CEC C-CATS 8000 OM F

CEC 8000
Computer-Controlled Amplifier and
Tracking System
(C-CATS)
Operator’s Manual
CEC Vibration Products Inc.
746 Arrow Grand Circle
Covina, CA 91722
(800) 468-1345
FAX: (626) 938-0200
Internet: http://www.cecvp.com
E-mail: info@cecvp.com

Updated February 2007; Publication No. 0700270-25-0001, Rev. F.
CEC Vibration Products is a registered trademark. C-CATS Software, C-CATS System Test Program and CP 8000 are trademarks of
CEC Vibration Products.
Copyright 2007 CEC Vibration Products Inc. All rights are reserved including that to reproduce this book or parts thereof in any form
without permission in writing from CEC Vibration Products Inc.
WARNING
This manual and software are protected by United States Copyright Law (Title 17 United States Code).
Unauthorized reproduction and/or sale may result in imprisonment of up to one year and a fine of up to $10,000
(17 USC 506). Copyright infringers may be subject to civil liability.

Contents
How to Use this Guide.............................................................................. 3
Chapter 1: Introduction......................................................................... 5
Unpacking the CEC 8000 ......................................................................... 5
Inspecting the CEC 8000.......................................................................... 6
Chapter 2: CEC 8000 Components ...................................................... 8
Front Panel Components.......................................................................... 9
Back Panel Components ........................................................................ 13
Interior Components ............................................................................... 14
Chapter 3: Hardware Installation ....................................................... 15
Preparing Your Wiring Diagram.............................................................. 16
Transducer Input/Output board ........................................................... 17
Tachometer Board............................................................................... 24
Computer Interface.............................................................................. 25
Wiring Your Connectors.......................................................................... 27
Installing the CEC 8000.......................................................................... 28
Chapter 4: Testing and Configuring the CEC 8000 .......................... 30
Running the C-CATS System Test Program.......................................... 31
Using the C-CATS Software to Configure the CEC 8000 ...................... 32
The C-CATS User Interface ................................................................ 33
Configuring the C-CATS Program ....................................................... 37
Configuring the CEC 8000 Transducers.............................................. 39
Configuring the CEC 8000 Amplifiers.................................................. 42
Configuring the CEC 8000 Filters........................................................ 44
Configuring the optional CEC 8000 tachometers ................................ 53
Configuring the routing options............................................................ 55
Saving, initiating, and terminating a program ...................................... 56
Acknowledging alarms......................................................................... 56
Zeroing the peak frequency and vibration indicators........................... 57
Using your Own Software to Configure the CEC 8000 .......................... 58
Chapter 5: Interfacing without the C-CATS Protocol....................... 60
Format of CEC 8000 Messages .......................................................... 61
CEC 8000 Device Addresses .............................................................. 63
CEC 8000 Status Bytes....................................................................... 63
Command List......................................................................................... 65
CEC 8000
iii

System Commands (Format: SX, Sx) ................................................. 66
Transducer Commands (Format: TX, Tx)........................................... 71
Output Commands (OX, Ox) ............................................................... 73
Filter Commands (FX, Fx) ................................................................... 75
Alarm Commands (AX, Ax) ................................................................. 89
Tachometer Commands (PX, Px)........................................................ 90
Chapter 6: Calibrating the CEC 8000................................................. 92
The Calibration Program......................................................................... 93
The Calibration Procedure...................................................................... 94
Chapter 7: Troubleshooting ............................................................. 106
What to do if the CEC 8000 is Not Functioning.................................... 107
What to do if you get an Erratic Reading.............................................. 108
Period Calibration ................................................................................. 109
If You Need to Return the CEC 8000 for Repair .................................. 109
Appendix A: Specifications .............................................................. 110
Appendix B: Optional Hardware and Software............................... 117
Index..................................................................................................... 118
Figures
Figure 1-1. CEC 8000 (6-Channel Configuration) .................................. 6
Figure 2-1. CEC 8000 (14-Channel Configuration) ................................ 9
Figure 2-2. Optional Manual Operation Mode (M.O.M.)....................... 12
Figure 2-3. CEC Inputs/Outputs (Rear View) ....................................... 13
Figure 3-1. Transducer Input/Output Connectors................................. 17
Figure 3-2. J2 Transducer Inputs ......................................................... 21
Figure 3-3. J3 Transducer Inputs ......................................................... 22
Figure 3-4. Tachometer Inputs ............................................................. 24
Figure 3-5. RS-232 Connector ............................................................. 25
Figure 4-1. C-CATS Operations screen ............................................... 32
Figure 4-2. CEC 8000 Major User Interface Controls .......................... 33
Figure 4-3. Sample Channel Face Style-1 ........................................... 34
Figure 4-4. Face Selector Box.............................................................. 35
Figure 4-5. Sample Channel Face Style-2 ........................................... 36
CEC 8000
iv

Figure 4-6. System Settings Menu ....................................................... 37
Figure 4-7. Transducer Manager Screen ............................................. 39
Figure 4-8. Transducer Manager Entry Screen.................................... 41
Figure 4-9. Transducer Manger with Transducer Added...................... 41
Figure 4-10. Amplifier Setting Screen.................................................... 42
Figure 4-11. Filter Settings Screen........................................................ 44
Figure 4-12. Filter Settings Screen: Fixed Bandpass Mode................. 46
Figure 4-13. Filter Settings Screen: Variable Bandpass Mode ............ 47
Figure 4-14. Filter Settings Screen: Tracking Mode............................. 48
Figure 4-15. Tracking Mode Screen with Percentage Selected............ 49
Figure 4-16. Filter Settings Screen: Sweep Mode................................ 50
Figure 4-17. Optional – Balance Filter Settings..................................... 52
Figure 4-18. Tachometer Settings Screen............................................. 53
Figure 4-19. Tachometer Enabled......................................................... 54
Figure 4-20. Backplane Routing Screen................................................ 55
Figure 4-21. Alarm Indicator .................................................................. 56
Figure 4-22. Peak Indicator ................................................................... 57
Figure 6-1. Calibration Program Screen............................................... 93
Figure 6-2. Initial Calibration Screen .................................................... 94
Figure 6-3. Calibration Reference Signal input .................................... 95
Figure 6-4. Channel/Step Selection Screen .......................................... 96
Figure 6-5. Normalized Output Screen................................................. 97
Figure 6-6. Scaled Output Screen: No Integration .............................. 98
Figure 6-7. Scaled Output: Acceleration-to-velocity Integration.......... 99
Figure 6-8. Scaled Output: Velocity-to-Displacement Integration ..... 100
Figure 6-9. Scaled Output with Both Integrators ................................ 101
Figure 6-10. Filtered AC Output Screen.............................................. 102
Figure 6-11. Filtered DC Output Screen.............................................. 103
Figure 6-12. Calibration Save Screen ................................................. 104
Figure 7-1. Double Fuse Used in CEC 8000...................................... 107
CEC 8000
v

Tables
Table 2-1. Alarm Settings ..................................................................... 11
Table 2-2. Connector Inputs/Outputs ................................................... 13
Table 3-1. Output Connector Pins on J1 .............................................. 18
Table 3-2. Input Connector Pins on J2................................................. 20
Table 3-3. MS Connector Pins on J3.................................................... 22
Table 3-4. Alarm Connector Pins ......................................................... 23
Table 3-5. RS-232 Pins ........................................................................ 26
Table 5-1. Device Status Bits ............................................................... 64
Table 5-2. Filter Modes......................................................................... 77
Table 5-3. Filter Table A ....................................................................... 80
Table 5-4. Filter Table B ....................................................................... 83
CEC 8000
vi

How to Use this Guide
This user’s guide provides the information you need to unpack, inspect, test,
configure, and calibrate the CEC 8000. It also explains how to troubleshoot the
system.
Getting started
To receive maximum benefit from this guide, read the appropriate section as
identified below as you perform each task. The tasks are listed in the order in
which they should be performed.
Task
Unpack the CEC 8000 and any
optional equipment.
Inspect the CEC 8000 and any
optional equipment.
Prepare your wiring diagram.
Note: You can prepare your wiring
Diagram beforehand if you have the
information in Chapter 3.
Wire connectors for CEC 8000
Note: You can wire your connectors
beforehand if you have the
information in Chapter 3.
Install the CEC 8000
Run the C-CATS System Test
Program
Read
Chapter 1: Introduction
(Unpacking the CEC 8000,
page 5).
Chapter 1: Introduction
(Inspecting the CEC 8000,
page 6).
Chapter 3: Hardware
Installation
(Preparing your Wiring
Diagram, page 16).
Chapter 3: Hardware
Installation (Section, “Wiring
Your Connectors,” on page
27).
Chapter 3: Hardware
Installation (Installing the
CEC 8000, page 28).
Chapter 4: Testing and
Configuring the CEC 8000
(Running the C-CATS
System Test Program, page
31).
CEC 8000 3

Task
Configure the CEC 8000 using
the C-CATS software…
-or-
Configure the CEC 8000 using
your own software.
Calibrate the CEC 8000.
Resolve any problems.
Read
Chapter 4: Testing and Configuring
the CEC 8000 (Using the C-CATS
Software to Configure the CEC
8000, page 32)…
-or-
Chapter 5: Interfacing to CEC 8000
Without C-CATS Software, page
60.
Chapter 6: Calibrating the CEC
8000, page 102.
Chapter 7: Troubleshooting, page
116.
To learn more
To learn more about the CEC 8000, read the sections identified below.
Subject
Components
CEC 8000 specifications.
Optional accessories.
Read
Chapter 2: CEC 8000
Components, page 8.
Appendix A: Specifications, page
120.
Appendix B: Optional Hardware
and Software, page 127.
CEC 8000 4

Chapter 1
Introduction
Overview
CEC 8000 is an advanced Computer-Controlled Amplifier and Tracking System
(C-CATS) with the capability of providing up to 14 separate amplifier/filter
modules. It is used with various transducers primarily to measure and monitor
the vibration of rotating and reciprocating equipment and machinery.
Unpacking the CEC 8000
This chapter provides information on unpacking and inspecting the CEC8000.
Subsequent chapters provide information on testing, configuring, and
calibrating the CEC 8000, as well as information on troubleshooting the
system.
The CEC 8000 was thoroughly tested, inspected, and carefully packed prior to
shipping. Upon acceptance, the carrier assumes responsibility for safe
delivery.
When you receive the CEC 8000, examine the shipping box for signs of
damage. Then set the box on a stable, electrostatic-fee surface and carefully
remove the tape from around the outside of the box.
With the tape removed, you can open the box and slide the unit out. It is
helpful to have one person hold onto the box while another person slides the
unit out. In addition to the CEC 8000, there should be a power cord and a
user’s manual, and any optional equipment you may have purchased.
CEC 8000 5

Inspecting the CEC 8000
After removing the CEC 8000 from its shipping container, inspect the outside of
the unit and any optional equipment you have purchased for signs of shipping
damage.
Figure 1-1: CEC 8000 (6-Channel Configuration).
If, while examining the unit, you discover any concealed shipping damage,
keep all filling material and crate components. File a concealed damage claim,
and make a written or telephone request to the carrier for inspection within 15
days of delivery. The carrier will furnish an inspection report and all necessary
forms for completing a concealed damage claim.
As with all computer equipment, we recommend that you keep the shipping
container and all inside packaging in the event that for some reason you need
to return the unit to CEC.
CEC 8000 6

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CEC 8000 7

Chapter 2
CEC 8000 Components
Overview
Chapter Topics
The CEC 8000 is designed to be mounted in a standard 19-inch rack; a
desktop version is also available. This section describes the basic components
of the CEC 8000 system. For more detailed information, refer to Appendix A:
Specifications.
This chapter covers the following topics:
Topic
See Page
Front Panel Components 9
Back Panel Components 13
Interior Components 14
CEC 8000 8

Front Panel Components
Figure 1-1 on page 6 shows a view of the front panel of the CEC 8000 with 6
channels. The standard system includes a chassis with a power supply and
serial I/O card. Depending on the size of chassis ordered, the system can
accommodate from 6 to 14 channels. The 14-channel configuration is shown
in Figure 2-1.
Figure 2-1. CEC 8000 (14-Channel Configuration).
CEC 8000 9

Each channel is composed of two modules: an Amplifier/Filter module, which is
removable from the front of the unit, and a Transducer Input/ Output module,
which is removable from the back of the unit.
Indicator lamps
In Figure 2-1 on page 9, you can see the Amplifier/Filter module indicator
lamps. The lamps are described below:
Power:
Fault:
Test:
Data:
Run:
Tracking:
Alarm:
Indicates that the power is ON for that particular module.
Indicates the presence of a system fault/error such as an
invalid command.
Indicates test or calibration mode. When the CEC 8000 is
powered on, the system goes through an automatic self test.
During this time, the test lamp should be illuminated. If the test
fails, the fault lamp illuminates.
Flashes when data comes in over the link (normally, all the
time when the system is in use).
Indicates that the system is operating.
Indicates that the filter is in tracking mode and is locked to the
input signal.
Monitors the vibration level and illuminates when tripped (see
Table 2-1 on page 11).
Alarms
Alarm trigger levels are set from the keyboard, as are the settings for latching
status, delay, and hysteresis (see Table 2-1).
CEC 8000 10

Table 2-1 Alarm Settings
Setting
Ascending/
Descending Level
Normally Open/
Normally Closed
Latched/
Non-Latched
Description
Defines whether the alarm will trip when
the measured value rises above
(ascending) the trigger level, or when the
measured value falls below (descending)
the trigger level.
Defines the normal (non-tripped) state of
the alarm. If normally-open, the alarm trips
to the closed state; if normally closed the
alarm trips to the open state.
When set to Latched, the alarm, once
tripped, stays on until you acknowledge it,
either through the computer or M.O.M. If
you do not acknowledge it, the alarm will
remain on, even though the alarm condition
no longer exists.
When set to Non-latched, the alarm, once
tripped, will automatically turn off when the
alarm condition no longer exists.
Delay
Hysteresis
Defines the amount of time during which
the amplitude must stay below (or above)
the trip level before the alarm will trip. For
example, if you select a delay of 10
seconds, the alarm condition must last at
least 10 seconds before the alarm will trip.
Defines the value below or above the trip
level at which the alarm trips on the
ascending level, the deactivation level
equals the trip level minus the hysteresis.
If the alarm trips on the descending level,
the deactivation level equals the trip level
plus the hysteresis.
Power supply
The power supply is an independent module that plugs into the back-plane and
is removable from the front of the unit. It accommodates a wide variety of
commercial power sources, while providing protection from line noise and
voltage spikes (via an internal line-filter). The unit’s modular design and
construction facilitate troubleshooting and replacement.
CEC 8000 11

Operation Module The optional Manual Operation Module (M.O.M.) is a version of the
(M.O.M.) power supply which allows you to operate and reconfigure the system without
the use of a computer. The M.O.M. (see Figure 2-2 below) has a numeric
display and keypad that permits you to monitor and give instructions to the
CEC 8000 just as you would with a computer.
Figure 2-2. Optional Manual Operation Module (M.O.M.)
CEC 8000 12

Back Panel Components
All cabling is at the back of the CEC 8000. The connector inputs/outputs are
illustrated in Figure 2-3 and described beginning on page 16.
Figure 2-3. CEC 8000 Inputs/Outputs (Rear View).
Table 2-2: Connector Inputs/Outputs.
Module Connector Function
Transducer
I/O Module
Alarm: Currently, two alarm contacts are
available.
Output: Generates processed signal from
incoming data.
Input: Receives incoming data.
BNC: Normalized output used to perform
spectral analysis of incoming
signal, whereby spikes and noise
are not processed or filtered out.
Tachometer
Module
(Optional) Handles up to 4 tachometer inputs;
can be manipulated via computer
Remote
Control
Module
Power
Supply
RS-232:
IEEE:
Universal
or M.O.M.
Provides interface between the
CEC and computer
Currently not available. Will
provide an alternate interface for
connecting the CEC 8000 to a
computer
The same power supply is used for
both the standard 6-channel
system and the 14-channel
system.
CEC 8000 13

Interior Components
Backplane
Signal Filters
Digital Filter
Line Filter
Fuse
Software
The backplane is located inside the chassis and forms the interface between
the Amplifier/Filter modules (located in the front of the chassis) and the
Transducer Input/Output modules (located in the back of the chassis). The
backplane provides all of the connections, including signal and power, between
the modules.
Various signal filters are available; they are all controlled and programmable
from the computer. The filters operate in one of five modes: fixed, variable,
tracking, sweep, and balance. See Chapter 5: Interfacing with the CEC 8000
without the C-CATS Software for details.
All digital filter processing is accomplished with an internal microprocessor.
Error codes and a context-sensitive HELP file further aid the user operating the
system.
The line filter is located inside the CEC 8000 and is connected to the
backplane.
There are two system fuses in the back of the CEC 8000. See Figure 7-1 on
page 117.
The CEC 8000 can be programmed using either CEC’s C-CATS software or
the user’s own customized software via CEC’s serial command protocol.
The computer can remain connected to the system for monitoring purposes or
it can be turned off or disconnected at the discretion of the user. Once
configured, the CEC 8000 can operate as a stand-alone system without the
computer.
CEC 8000 14

Chapter 3
Hardware Installation
Overview In preparation for wiring your equipment so that you can install the CEC 8000,
you will need to prepare a wiring diagram. The wiring diagram describes how
to get the relevant inputs and outputs from your equipment to the CEC 8000
and from the CEC 8000 to your equipment.
Unless you are using only the optional Manual Operation Module (M.O.M.), you
will need to include in your wiring diagram information on connecting the CEC
8000 to your computer (via a serial RS-232 connector).
Once you have prepared your wiring diagram, you are ready to wire your
connectors, plug them into the back of the CEC 8000, and, finally, install the
CEC 8000 into your system.
Chapter topics
This chapter covers the following topics:
Topic
See Page
Preparing your Wiring Diagram 16
Wiring your Connectors 27
Installing the CEC 8000 28
CEC 8000 15

Preparing your Wiring Diagram
This section describes all pins located on the connector input/outputs found on
the following CEC 8000 boards:
CEC 8000 Board Type of Connector Used to Connect
Transducer
Input/Output (I/O)
Tachometer
J1 Outputs
J2 Inputs
J3 Inputs
Alarm
BNC (Normalized Output)
Tach 1 Input
Tach 2 input
Tach 3 Input
CEC 8000 channels
to equipment being
monitored
CEC 8000 to up to
four tachometer
inputs
Tach 4 Input
Computer Interface RS-232 CEC 8000 to
computer
Use the information in this section to prepare your wiring diagram.
Note: You can prepare your wiring diagram before the CEC 8000 arrives
provided you have the information contained in this section.
CEC 8000 16

Transducer I/O Board
The input and output connectors for the Transducer I/O board are illustrated in
Figure 3-1. The pins associated with each connector are described in Table 3-
1 through Table 3-4.
Figure 3-1: Transducer Input/Output Connectors.
Alarm
Contacts
J1
J2
Mate = MS3116F14-19S
CEC P/N 700469-90-0002
Mate = MS3116F12-10S
CEC P/N 700469-90-0001
Normalized
Output
BNC
J3
Mate = MS3106F10SL-3S
CEC P/N 525033-0001
CEC 8000 17

J1 connector The mating connector for J1 is MS3116F14-19S. The twelve assigned pins are
described in the following table.
Table 3-1: Output Connector Pins on J1.
Signal Pin Description
AGND
J1-A & Analog Ground. This common is used with all analog
J1-G outputs.
BAC J1-B
Filtered AC Output. This is the actual vibration signal
after it has been conditioned by the user selected filters.
The value is scalable from 0-10 VAC Peak, using the
CCATS or M.O.M. software. If the channel is set up to
read RMS or Peak to Peak, the maximum 10 VAC
would be scaled accordingly.
Note: The AC output on this pin will only show the
waveform information that is present between the high
and low pass filters or within the bandwidth of the
Sweep, Tracking and Variable Mode filters of that
channel.
FREQ J1-C
Center Frequency of Sweep, Tracking or Variable Mode
Filters. This is a 0-10 VDC output that is proportional to
the center frequency of the selected filter. The 0-10
Volts frequency equivalents are selected by the user
and are assigned by setting appropriate Min. and Max.
frequency values within the filter set-up screen.
This output is useful when operating in Tracking Mode
and the center frequency or operating speed of the
engine under test is required for external processes.
DGND J1-D
Digital Ground. Only used in conjunction with J1-E, Pen
set output.
PEN J1-E
X-Y Plotter Pen Set output. Used to tell plotter when to
raise and lower pen. (0 = pen up; 1 = pen down)
SO J1-F
1 Volt Peak, Full Scale Output. This is an AC output
equal to the integrated, but unfiltered signal input,
conditioned to the desired units and scaled to 1 Volt
Peak. This output may be viewed on an o-scope or
spectrum analyzer to see the entire signal stream being
processed by the 8000 system.
NO J1-H
Normalized Output. Also known as broadband output,
this signal is the buffered transducer input converted to
50 mV per (g or ips) depending on the transducer type.
This signal is unfiltered and represents direct transducer
data, no signal conditioning. This signal is also located
on the BNC connector of each channel.
PHASE J1-L
This is a 0 to 10-VDC proportional output. It is
proportional to 0 to 360 degrees, phase. It is active only
during balance mode, which is an option on the CEC
8000.
BDC J1-M
Buffered DC Output. This is the True RMS equivalent of
the integrated filtered waveform. The value is scalable
from 0-10 VDC, and is proportional to the actual
vibration level of all filter modes.
CEC 8000 18

Signal Pin Description
PK VIB J1-N
Peak (Maximum) Vibration Level. Active only during
Sweep and Balance filter modes, this 0-10 VDC
proportional output represents the peak or maximum
vibration level encountered during the sweep process.
The 0-10 VDC output is proportional to the range set for
this channel, i.e. 0-5 ips, g’s or mils.
Peak Frequency. Active only during Sweep and
Balance filter modes, this 0-10 VDC proportional output
represents the frequency at which the peak or maximum
PK
J1-P vibration level encountered during the sweep process
FRQ
occurred. The 0-10 VDC proportional output is set by
entering the appropriate Min. and Max. frequency within
the Sweep Filter set-up screen.
CEC 8000 19

J2 connector
The Mating connector for J2 is MS3116F12-10S. The pins are described in the
following table.
Table 3-2: Input Connector Pins on J2.
Signal Pin Description
ICP+ J2-A
This input is hooked up to a constant current
transducer (ICP). It is set for 3.75 milliamps. If
you are hooking up to an ICP, the signal or (+)
would go to this pin, and the (-) would go to J2-B.
AGND
J2-B & Analog ground. This is used as a reference for a
J2-E millivolt input device or ICP.
SHIELD J2-C Earth ground shield connection.
VEL+ J2-F
The (+) side of a velocity coil input.
See Note following table.
VEL- J2-G
The (-) side of a velocity coil input.
See Note following table.
Calibration input used for a local (that is, singlechannel)
calibration.
CAL J2-H
+24V J2-J
MILLI J2-K
Note: You can also do a system calibration and
inject a calibration signal into the system all at
once, rather than doing the calibration channel by
channel.
This is a 20-24 VDC @ 50 mA power source for
powering remote connectors or transducers, such
as the 4-155.
This is a millivolt input. You can hook one side of
any device that generates a millivolt signal into
this pin. The other side you would hook to J2E.
Note:
If, for example, you had a velocity coil such as CEC’s 4-137 transducer, you
would hook one side to VEL+ and the other side to VEL-. Because the system
is self-generating, these are the only two connections you would need.
CEC 8000 20

Figure 3-2: J2 Transducer Inputs.
ICP
6 mA Constant Current
(CEC series 4-160)
Signal +
Common
Shield
A
B
C
Velocity
Self Generating Coil Type
(CEC series 4-102, 4-103,
4-118, 4-123, 4-125, 4-126,
4-128, 4-130, 4-131,
4-137, 4-138)
Signal +
Signal -
Shield
F
G
C
AC mV
Remote Charge Amp,
Displacement Probe, etc…
Signal +
Common
Shield
+24 VDC
K
E
C
J
Note: To avoid alternate current paths,
Shield should be connected at signal
processor side only.
CEC 8000 21

J3 pins The mating connector for J3 is MS3106F10SL-S. It is used exclusively for lowlevel
picocoulomb-type inputs. Because these inputs are very susceptible to
noise, they are put on a separate connector.
Table 3-3: MS Connector Pins on J3
Signal Pins Description
CHG+ J3-A
This pin is for the (+) end of a single-ended
device or a differential, piezo transducer.
CHG- J3-B
Only when you have a differential piezo-type
transducer would you hook the CHG- up, and it
would be hooked to the other side of the
differential accelerometer.
AGND J3-C
Analog Ground. This should be hooked up either
to the shield or a common.
Figure 3-3:
J3 Transducer Inputs.
Piezoelectric
Accelerometer
Single Ended
non-integrated pC
Signal +
Shield
A
C
Piezoelectric
Accelerometer
Differential
non-integrated pC
Signal +
Signal -
Shield
A
B
C
Note: To avoid alternate current paths,
Shield should be connected at signal
processor side only.
CEC 8000 22

Alarm pins There are two sets of alarm pins. They are shown in Table 3-4. The alarms
can be normally open or normally closed, depending on how you configure
them.
Note: You must provide the voltage for the alarms.
Table 3-4: Alarm Connector Pins.
Signal Pin Description
Alarm 1 contacts 1 and 2 Solid state switch.
Alarm 2 contacts 3 and 4 Solid state switch.
BNC pins
The BNC connector contains the Normalized Output (NO). This is an
unfiltered, broadband buffered transducer output that has been normalized to
50 mV per ips or 50 mV per g.
CEC 8000 23

Tachometer Board
The Tachometer Board (see Figure 3-4) handles up to four tachometer inputs.
Pins 1 (+) and 2 (-) are for tachometer 1; pins 3 (+) and 4 (-) are for tachometer
2; pins 5 (+) and 6 (-) are for tachometer 3; pins 7 (+) and 8 (-) are for
tachometer 4.
Figure 3-4: Tachometer Inputs.
TACH 1
TACH 2
TACH 3
TACH 4
CEC 8000 24

Computer Interface
If you did not purchase the Manual Operation Module (M.O.M.), you must
interface the CEC 8000 with your computer. Currently, this is accomplished
with a serial RS-232 connector (see Figure 3-5).
Figure 3-5: RS-232 Connector.
RS232 Port
Std. 9 Pin D-Sub
CEC 8000 25

Table 3-5: RS-232 Pins.
Signal Pin Description
1 Not used.
RX 2
Receives data transmitted from the CEC 8000
to the computer.
TX 3
Sends data from the computer to the CEC
8000.
DTR 4
Data Terminal Ready. This is a busy signal
from the computer to the CEC 8000. This
signal comes on when the buffers on the
computer are full. It tells the CEC 8000 to stop
transmitting until the information in the buffers
is processed.
GND 5 Ground.
DSR 6
Data Set Ready. This is a busy signal from the
CEC 8000 to the computer. This signal comes
on when the buffers on the CEC 8000 are full.
It tells the computer to stop transmitting until
the information in the buffers is processed.
7 Not used.
8 Not used.
9 Not used.
CEC 8000 26

Wiring Your Connectors
After you prepare your wiring diagram, use the diagram to wire your
connectors. Assuming that the wiring diagram is sufficiently detailed, this
should be a fairly simple and straight-forward procedure.
Note: You can wire your connectors before the CEC 8000 arrives, provided
you have prepared a wiring diagram.
Once you have wired your connectors, you are ready to install the CEC 8000
into your system.
CEC 8000 27

Installing the CEC 8000
Grounding
The CEC 8000 comes with a three-conductor AC power cable. The power
cable must be connected to an approved three-contact electrical outlet that has
its grounded conductor connected to an electrical ground (safety ground).
Do the following to install the CEC 8000 into your system.
1. For each channel, plug in the appropriate pre-wired transducer
input/output connectors.
2. If you are using one or more tachometers, plug in the tachometer
inputs.
3. If you did not purchase the optional Manual Operation Module
(M.O.M.) and are connecting the CEC 8000 to your computer, plug in
the RS-232 serial connector.
Note: A nine-pin male connector is required. If you have a 25-pin connector,
you must modify it using a 25-pin to 9-pin D-shell adapter, available at
most computer stores.
4. Plug in the power cable.
5. Once you have plugged in all of your pre-wired connectors and the
power cable, slide the CEC 8000 into position on its rack and secure
the bolts.
You are not ready to run the test program and configure the CEC 8000.
WARNING:
For protection from electrical shock, the power cord ground must not be
defeated.
CAUTION:
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
CEC 8000 28

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CEC 8000 29

Chapter 4
Testing and Configuring the CEC 8000
Overview
Chapter topics
After the CEC 8000 is hooked up to your system, you must run a configuration
program to test the CEC 8000 in order to make sure that all the connections
have been made and the CEC 8000 is working properly. Then you must
configure the transducers, amplifiers and filters – in addition to any
tachometers you may have. You can configure the CEC 8000 using either the
C-CATS software or your own customized software.
This chapter covers the following topics:
Topic
See Page
Running the C-CATS System Test Program 31
Using the C-CATS Software to Configure the
CEC 8000
32
Using Your Own Software to Configure the
CEC 8000.
58
CEC 8000 30

Running the C-CATS System Test Program
Note: This program is currently in development.
To run the C-CATS System Test Program under Windows, insert the CD into
the appropriate drive, click Run and type the following:
D:\test
The program will look at the CEC 8000 and report back on how many channels
it sees, what the serial numbers are, and what your configuration is. The
program will let you know if there are any problems – for example, if the serial
port is not properly configured. If you wish, you can print out this information.
The CEC 8000 was configured at the factory to your specifications. However,
if the configuration does not match, you must re-configure your system using
either the C-CATS software or your own customized software.
CEC 8000 31

Using the C-CATS Software to Configure the CEC 8000
If you are using the C-CATS software to configure your system, insert the disk
into your CD drive, run the Setup.exe program.
The C-CATS software will prompt you for the information it needs on where to
install the software.
When you have successfully installed the software, double-click the C-CATS
software icon. The C-CATS Operations screen appears.
Figure 4-1. C-CATS Operations screen.
The C-CATS Operations screen is used to configure the CEC 8000
transducers, amplifiers, filters, and optional tachometers.
Note: You must configure the transducers first.
CEC 8000 32

The C-CATS User Interface
Just below the Menu bar are the major controls for the CEC 8000 user
interface:
Figure 4-2: CEC 8000 Major User Interface Controls.
CEC C-CATS X.XX
File Settings Windows Tachometers Help
Line Up
STOP
Snap To
RUN
COM
RUN
Channels
1 2 3
There are four buttons on the left side (Line Up, Snap To, Stop, and Run).
Line Up and Snap To are used to arrange instrument panels on the desktop.
Run and Stop are used to initiate and terminate a program. To the right of
these four buttons are the Com and Run indicators.
The Com indicator lets you know that the C-CATS program is communicating
properly with the CEC 8000. It is green when communication is successful and
flashes red and orange when no communication has been established. The
Run indicator lets you know whether a program is being run on the CEC 8000
or not. It is red when no program is running and green when a program has
been initiated.
To the right of these indicators are the Channel Selector checkboxes.
The Channel Selector checkboxes allow you to select which channels will be
displayed. They are disabled until either a program is loaded (File.Open) or a
new program is created (File.New). Once a program has been loaded or
created, the Channel Selector checkboxes become enabled, allowing you to
check a channel for display and bring up its channel face:
CEC 8000 33

Figure 4-3. Sample Channel Face Style -1.
Selecting a Face
for Display
There are several optional display faces for each instrument channel.
By clicking the instrument face below its associated drag bar, you will bring up
the face selector box:
CEC 8000 34

Figure 4-4. Face Selector Box.
There are several methods you can use to display information for each
channel. The Face Selector Box allows you to choose between small,
medium, and large display faces. Additionally, you may choose to display
vibration information, vibration and center frequency information, or vibration,
center frequency, peak vibration, and peak center frequency information.
When you select a face style and click OK, the associated face style will
change:
CEC 8000 35

Figure 4-5. Sample Channel Face Style -2.
Each channel displayed can be configured. By using Line Up or Snap To, you
can arrange how instrument faces are arranged on the desktop.
CEC 8000 36

Configuring the C-CATS Program
The System Settings menu (see below) allows you to select the communication
port, the baud rate for communication, the default units of display (whether
English or Metric) and the Poll Interval (the period between instrument screen
updates).
Note:
The program will permit you to configure only a minimum
number of settings under the System Settings menu unless a
program is loaded or a new program is created.
Figure 4-6. System Settings Menu.
The procedure is outlined below:
Step Action
Select 19200 as the baud rate. This determines the
1 speed at which information gets transferred between
your computer and the CEC 8000.
Select the comm port to which your CEC 8000 is
connected. Consult a technician if you are unsure.
2 Although systems vary, most computers use Port 1
for the serial mouse and Port 2 is available for
communicating with your CEC 8000.
Select poll interval. In most cases, you will want the
fastest setting (0.25); however, if you have a slower
3
system with a 486 CPU, you will want to use the
slower poll intervals (e.g.) 1.00).
4 Select English or Metric as the Default Unit.
5 Click OK to save your selections.
CEC 8000 37

There are two new options under Settings.
1) Used to lock/unlock settings options so only authorized users can make
changes.
The first time this option issued the User will be prompted to set a password.
The password can be reset by using the File-Reset Password command.
If the password is forgotten, the default password “Snowball” can be used to
reset the password.
2) Read settings from 8000: This command reads the current configuration
settings from the 8000 amplifiers.
CEC 8000 38

Configuring the CEC 8000 Transducers
There are a minimum number of settings available to you unless you load or
create a new program. Once you do so, then, when you select transducers
from the Settings menu on the Operations screen, the Transducer Manager
screen appears:
Figure 4-7. Transducer Manager Screen
The above screen permits you to add, delete, or modify parameters for
different transducers. Follow the instructions below.
Step
1
2
3
Action
Press the ADD button to display the screen shown in
Figure 4-8.
In the Name field, enter the name of your transducer.
You can use any appropriately descriptive name.
In the Type field, select the type of transducer you
have from the pop-up menu. For more information
on transducer types, refer to Chapter 5: Interfacing
to CEC 8000 without the C-CATS Software
CEC 8000 39

Step
4
5
Action
Enter the sensitivity of the transducer. This
information is usually provided by the manufacturer.
Note: The system displays the appropriate
units for sensitivity based on the
transducer type you entered in the
preceding field.
Click the SAVE button to add the information to the
Transducer Manager listing (see Figure 4-9).
Connections Menu: Connect: Connects host to 8000
Disconnect: Terminates connection to 8000
CEC 8000 40

Figure 4-8. Transducer Manager Entry Screen.
Figure 4-9. Transducer Manager with Transducer Added.
CEC 8000 41

Configuring the CEC 8000 Amplifiers
When you select Amplifiers from the Settings menu on the Operations screen,
the following screen appears:
Figure 4-10. Amplifier Setting screen.
The above screen is used to configure your amplifiers. The procedure is
outlined on the following page.
Note: Before you can configure your amplifier, you must configure its
associated transducer (refer to page 39).
CEC 8000 42

Step
Action
Enter the information for the transducer associated with this
amplifier as specified below.
1 Ch No.
2
Transducer
Type
3 Mode
Note:
4 Range
5 Units
6
DC
Full Scale
Output
Represents the channel position within the rack
assembly. Channels are numbered from left to
right when viewed from the display side of the
unit. For 14 channel systems, channel one is
located at the top left.
Select the type of transducer to be connected to
this channel. You may select “none”, a route
number if you have previously defined a route,
or a transducer previously entered within the
Transducer Manager.
For more information, refer to page 81 in
Chapter 5.
Values in the Sensitivity and Description fields
are automatically entered when you enter the
Transducer Type.
The mode for which vibration will be measured
[e.g., acceleration (g’s), velocity (ips),
displacement (mils)].
The full scale range for which you are interested
in measuring vibration (e.g., 0-5 ips).
The unit of measurement. This describes the
manner in which you desire to measure
vibration. The options are Root Mean Square
(RMS), Average, Peak, or Peak-to-Peak.
This field is used to scale your output units. As
you change the units, the upper end of the scale
changes. E.g., say your units are expressed in
peak, and scaled at 0 to 10 volts peak. If you
then change the units to RMS, and keep the
scale at 0 to 10 volts peak, the maximum you
can select will change to 7.1 volts – which is
equivalent to 10 volts peak.
7 Enter the alarm settings described in detail in Table 2-1 (see
page 11).
8 Repeat steps 1 thru 7 for each amplifier you desire to
configure.
9 When you have finished configuring your amplifiers, click OK.
The program will prompt you to save the information you
entered.
10 Enter Y to save the information. The system will return to the
Operations menu.
You are now ready to configure your filters. To access the appropriate screen,
click the button on the screen shown in Figure 4-10.
CEC 8000 43

Configuring the CEC 8000 Filters
When you click the Filter button on the screen shown in Figure 4-10, the
following screen appears:
Figure 4-11. Filter Settings Screen.
The above screen is used to configure your filters. The procedure is outlined
on the following page.
CEC 8000 44

Step Action
1 Select the filter desired from the drop-down menu:
• Off
• Fixed Bandpass
• Variable Bandpass
• Tracking
• Sweep
Note:
To turn off all filters and their associated functions,
you would select the OFF.
2 Refer to the appropriate instructions below for the mode you
selected.
Instructions for
Fixed Bandpass
Mode
To configure a filter for Fixed Bandpass mode, refer to Figure 4-12, and
follow the instructions below:
Step
Note:
Action
There are two filter ranges for the low pass and high pass
filters. The ranges for each table are:
Table A
Table B
Low Pass 50-5000 Hz 1000 – 25,000 Hz
High Pass 5-1000 Hz 1000 – 25,000 Hz
1 Using the Low Pass Filter drop menu, select either OFF or a
frequency from one of the ranges specified.
2 Using the High Pass Filter drop menu, select either OFF or a
frequency from one of the ranges specified.
3 Click OK to save your choice. The Amplifier Settings screen
will reappear.
Note:
See Table 5-2 on page 87 for a detailed explanation of Fixed
Bandpass mode.
CEC 8000 45

Figure 4-12. Filter Settings Screen: Fixed Bandpass Mode.
CEC 8000 46

Instructions for
Variable Bandpass
The screen that appears when you select Variable Bandpass mode is
shown on the following page.
Figure 4-13. Filter Settings Screen: Variable Bandpass Mode.
Do the following to complete the screen:
Step Action
1 Type the bandwidth. Valid values range from 2 – 100 Hz.
2 Type the center frequency. Valid values range from 5 – 5000.0
Hz.
3 Click the OK to save your choices. The Amplifier Settings
screen will reappear.
Note:
See Table 5-2 in page 87 for a detailed explanation of Variable
Bandpass mode.
CEC 8000 47

Instructions for
Tracking Mode
The screen that appears when you select Tracking mode is shown
below:
Figure 4-14. Filter Settings Screen: Tracking Mode.
Do the following to complete the screen:
Step Action
1 Select the Fixed or Percentage radio button.
2 If you selected the Fixed button, type the fixed bandwidth.
Valid values range from 2 – 100 Hz.
3 If you selected the Percentage radio button, the screen in
Figure 4-14 will appear. Type the percentage bandwidth. Valid
values range from 1-5%.
4 If you selected the Percentage radio button, enter the
bandwidth minimum. Valid values range from 1 – 100 Hz. The
value that you enter in this field must be less than the value that
you enter for Bandwidth Maximum.
5 If you selected the Percentage radio button, enter the
bandwidth maximum. Valid values range from 2 – 100 Hz. The
value that you enter in this field must be greater than the value
that you enter for Bandwidth Minimum.
6 Select the source tachometer (1-4) from the drop down list.
CEC 8000 48

Step Action
7 Enter the minimum frequency of the tracking range in the
Frequency Minimum text box. Valid values range from 5 –
5000 Hz. The minimum frequency must be less than the
maximum frequency.
8 Enter the maximum frequency of the tracking range in the
Frequency Maximum test box. Valid values range from 5 –
5000 Hz. The maximum frequency must be greater than the
minimum frequency.
9 When you are finished, click the OK to save your choice. The
Amplifier Settings screen will reappear.
Note:
See Table 5-2 on page 87 for a detailed explanation of Tracking mode.
Figure 4-15. Tracking Mode Screen with Percentage Selected.
CEC 8000 49

Instructions for The screen that appears when you select Sweep mode is shown
Sweep Mode below:
Figure 4-16. Filter Settings Screen: Sweep Mode.
Do the following to complete the screen:
Step Action
1 Select the Fixed or Percentage radio button.
2 If you selected the Fixed radio button, type the fixed bandwidth.
Valid values range from 2 – 100 Hz.
3 If you selected the Percentage radio button, type the
percentage bandwidth. Valid values range from 1 – 5%.
4 If you selected the Percentage radio button, enter the
bandwidth minimum. Valid values range from 2 – 100 Hz. The
value that you enter in this field must be less than the value that
you enter for Bandwidth Maximum.
5 If you selected the Percentage radio button, enter the
bandwidth maximum. Valid values range from 2 – 100 Hz. The
value that you enter in this field must be greater than the value
that you enter for Bandwidth Minimum.
6 Select the Sweep Sequence.
CEC 8000 50

Step Action
7 Enter the Step Size. Valid values are from 1.0 – 100.0 Hz.
8 Enter the Delay. Valid values are from 1 – 60,000 msec.
9 Enter the Start Frequency. Valid values are from 5 – 5000 Hz.
The value that you enter in this field must be less than the value
you enter for the Stop Frequency.
10 Enter the Stop Frequency. Valid values are from 5 – 5000 Hz.
The value that you enter in this field must be greater than the
value you enter for the Start Frequency.
11 Click OK to save your choices. The Amplifier Settings screen
will reappear.
Note:
mode.
See Table 5-2 on page 87 for a detailed explanation of Sweep
CEC 8000 51

Note:
Only model 8217 is programmed with the Balance Mode enabled.
Figure 4-17. Optional - Balance Filter Settings
Polar: Outputs amplitude on (Peak Vibration) and phase angle on (Phase)
Rectangular: Outputs the Cosine value on (Actual Frequency) and the Sine
value on (Phase)
CEC 8000 52

Configuring the Optional CEC 8000 Tachometers
When you select Tachometer from the Amplifier Settings screen, the following
screen appears:
Figure 4-18. Tachometer Settings screen.
Do the following to enable a tachometer:
Step Action
1 Click the Enabled box to enable the appropriate tachometer
input. (When you enable a tachometer, the screen shown in
Figure 4-19 appears).
2 For the tachometer you enabled, select either Leading or
Trailing to indicate the edge you want to use as a reference.
3 For the tachometer you enabled, enter the tachometer ratio.
The ratio can be any number between 0.01 to 999.99.
Note: This number must be entered in order for the system to
properly calculate the frequency.
4 Repeat steps 1 through 3, if desired, to enable another
tachometer.
5 Click the OK to save your choice. You will be returned to the
Operations screen.
CEC 8000 53

Figure 4-19. Tachometer Enabled.
CEC 8000 54

Configuring the Routing Options
When you select the Routing menu item from the Settings menu bar, the
following screen appears:
Figure 4-20. Backplane Routing screen.
To configure the routing, do the following:
Step Action
1 Choose the route over which you want a transducer channel’s
signal to be driven.
2 Select a source channel’s number from your chosen route’s
channel drop menu. Only one channel may drive one route.
You may not drive two routes with the same channel.
3 Repeat steps 1 and 2 for any additional routes you want driven.
4 When you are finished, click OK to save your choices. The
Operation screen will reappear.
CEC 8000 55

Note: To receive a signal from a route, make sure that a source channel is
assigned to a route on the screen shown in Figure 4-20, and make
sure that the destination channel’s Transducer Type selects the
desired source route selected from the Amplifier menu item of the
Settings bar.
Saving, Initiating, and Terminating a Program
Saving a program
Initiating a program
Terminating a program
Once you have configured your program, you can save it by selecting the Save
or Save As menu item under the File menu bar. This will permit you to
immediately load all of the settings you have saved at a future time.
Once a program has been configured, you may run your program by selecting
the Run button on the Operations screen.
Once a program has been initiated with the Run button, you may terminate it
by pushing the Stop button.
Acknowledging Alarms
When alarms have been enabled (under the Amplifier menu item of the
Settings bar), and a program is running, you may get an alarm condition,
depending on the configuration of the alarms. You may acknowledge the
alarm, thus putting that channel back into a non-alarm status, by clicking the
left mouse button on top of the associated alarm’s indicator.
Figure 4-21. Alarm Indicator.
Ch 4
Accel g RMS
0 0.25 0.5
0.00
1 2
The alarm indicators are the green circular display indicators with alarm
numbers underneath. They flash red during an alarm condition. (The
background of the instrument face also flashes red.)
All faces have alarm indicators which, when pressed during program execution,
acknowledge the associated alarm status.
CEC 8000 56

Zeroing the Peak Frequency and Vibration Indicators
For those display faces with Peak Vibration and Peak Frequency indicators,
you may want to zero the peak values to permit the sweep to capture a more
recent value. To do so while running a program, click inside the numerical
indicator for the peak frequency or peak vibration.
Figure 4-22. Peak Indicator
Peak
0
You must click within the white box delineating the numerical peak value to
zero out the associated peak value.
CEC 8000 57

Using Your Own Software to Configure the CEC 8000
If you will be using your own software to configure the CEC 8000, refer to
Chapter 5, Interfacing to CEC 8000 Without the C-CATS Software, for
information on the commands needed to set the CEC 8000 parameters.
CEC 8000 58

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CEC 8000 59

Chapter 5
Interfacing to CEC 8000 Without the
C-CATS Software
Overview
Chapter topics
If you elect not to use the C-CATS software, you can write your own program
from scratch.
This chapter covers the following topics:
Topic
See Page
Writing Your Own Program 61
Command List 65
CEC 8000 60

Format of CEC 8000 Messages
Writing Your Own Program
If you elect not to use the standard CCATS 8000 software provided with your
8000 system, you will need to write your own program interface for the CEC
8000. The protocol (or language) that you must use is discussed in this section.
The format of any message that is sent to or from the CEC 8000 has three
components: a preamble, a data packet, and a postamble.
ADR CMD DATA SP RS ETX CHK
▲ ▲ ▲
Preamble Data Packet Postamble
Note: There is no space between any of the seven fields shown above. The
spaces are inserted for clarity.
Preamble (ADR)
The preamble contains the address byte (ADR), which consists of a number
between 0 and 63 (plus 128). The address byte tells the system controller (for
example, the RS-232) which channel the message is going to or coming from.
When a message is being sent to the CEC 8000, the address byte is the
destination address. When a message is being sent from the CEC 8000, the
address byte is the destination address. When a message is being sent from
the CEC 8000 the address byte is the source address.
For more information on device addresses, refer to page 63, CEC 8000 Device
Addresses.
Data Packet
The data packet contains the substance of the message. It has four parts,
which are described in the following table on page 62.
CEC 8000 61

Data Packet
Component
Command (CMD)
Data
Space
Delimiter (SP)
Record
Separator (RS)
Description
All commands consist of a 2-byte ASCII code. The first
byte specifies the class of commands (for example,
alarm commands). The second byte further defines the
command. For example, the second byte in the alarm
command AT tells us that this command is used to set
the alarm trip level.
The data area specifies want you want the CEC 8000 to
do with the command. For example, AT1.25 is used to
set the alarm trip level to 1.25.
Note: The data may contain more than one field of
information, depending on the command. Each
data field must be separated by a space delimiter
(32).
An ASCII space (32).
An ASCII record separator. Marks the end of a data
packet. As many CMD DATA SP RS strings as
necessary can be included in the same message
provided an entire message does not exceed a
maximum of 250 characters. The command packets, for
course, must all be destined for the same address.
Note: Although in a normal message, you would usually
have only one command, in an initialization string
you might have multiple commands.
Post amble
The post amble marks the end of the message. It consists of an ASCII End of
Text (ETX) character (3) and a checksum (an 8-bit sum of all message
characters including the address). Bit 7 is masked to prevent false address
detection. Possible values of the checksum therefore range from 0 to 127.
Note:
A COMM ERROR status bit is set whenever a checksum error is
detected, and the associated message is ignored.
CEC 8000 62

CEC 8000 Device Addresses
CEC 8000 Status Bytes
Internally, the CEC 8000 uses a 6-bit address; there are therefore 64 address
possibilities (that is, 2 6 ). The standard, or permanent, fixed addresses are
listed below:
Address Device
63 (+128) System Controller (that is, the RS-232)
61 (+128) M.O.M.
60 (+128) Tachometer Control Board
0 (+128) Broadcast
The remaining available addresses possibilities are 1 through 59 (+128),
although, currently, we use only 1 through 6 (in a 3U configuration) or 1
through 14 (in a 6U configuration).
The position in which you plug an amplifier into the backplane determines its
address. In a 3U configuration, for example, the address of the first board you
plug in (starting from the left) would be 1 (+128), the address of the second
board would be 2 (+128), and so on.
The Broadcast address (0 +128) enables you to send a message to all
channels at the same time.
Note: 128 is added to the addresses above because all addresses have bit 7
set. (128 is bit 7 in the binary system).
A status byte tells the host (that is, the computer or M.O.M.) what state a
device is in. Status bytes are transmitted to the host when a device’s state
changes. For example, if Alarm 1 on an Amplifier/Filter board comes on, the
Amplifier/Filter board will send out a status byte informing the host that Alarm 1
is on.
The status bytes are ASCII numbers (for example, 36) which translate to the bit
maps shown in Table 5-1.
CEC 8000 63

Table 5-1: Device Status Bits
Device Bit Value Meaning
Amplifier/Filter
13 8192 Sweep
(Type ‘1’)
12 4096 Track
11 2048 Alarm 4
10 1024 Alarm 3
9 512 Alarm 2
8 256 Alarm 1
Manual
Module
(Type ‘6’)
Operation
Tachometer Module
(Type ‘3’)
5 32 Run Mode
4 16 Off Line
3 8 Power Up
2 4 Error
0 1 Comm Error
5 32 Run Mode
4 16 Off Line
3 8 Power Up
2 4 Error
1 2 Remote
0 1 Comm Error
5 32 Run Mode
4 16 Off Line
3 8 Power Up
2 4 Error
0 1 Comm Error
Device Bit Value Meaning
Remote Control 5 32 Run Mode
(Type ‘5’)
4 16 Off Line
3 8 Power Up
2 4 Error
1 2 Remote
0 1 Comm Error
The weight, or value, of the bit is equal to 2 [bit] ---for power up in the M.O.M.
device, for example, this would be 2 3 or 8.
CEC 8000 64

Command List
This section covers all the various commands that the C-CATS software can
send to and receive from the CEC 8000.
There are six basic classes of command. They are listed below.
• System commands
• Transducer commands
• Output commands
• Filter commands
• Alarm commands
• Tachometer commands
As noted previously, all commands consist of a 2-byte ASCII code. If the
second byte is in lower case, the command is a read command. If the second
byte is in upper case, the command is a write command. For example, the TT
command is used to write the transducer type, and the Tt command is used to
read the transducer type. Most commands have both a write and a read
version.
This section discusses in detail the individual commands provided in all six
classes listed above. For the sake of clarity, only one version (read or
write) for each command is discussed.
CEC 8000 65

System Commands (Format: Sx, SX)
System commands are used to send system-related information back and forth
between the devices in the CEC 8000 and the host (that is, the computer or
M.O.M.).
System Sync (Sy) Data: None
Response: SY (once all buffers are cleared)
(Example- SY)
When the controlling software sends messages to the System Controller (SC),
the SC queues the messages up in its buffers. Then as it has time, and as the
channels to which the messages are addressed become available to receive
messages, the SC sends the messages out. As a result, there is no control
over the order in which messages are sent out.
By sending out a Sy command after a block of messages, however, you can
ensure that all of those messages are sent ahead of any further messages.
The SC, when it sees a Sy command, waits until all its buffers are empty
before it responds to the host. The ADR should always be address 63 (+128)
for the Sy command.
(53 ‘9s’)
System shot (Ss) Data: None 0 without Tach Card
Response: ‘0’. ‘1’. ‘3’. ‘6’, ‘8’, or ‘9’ 0 without M.O.M.
↓ ↓↓
(Example – SS11111199… 93687)
When you power up the CEC 8000, the first thing the controlling software
needs to know is the configuration of your system. The System Snapshot
command (Ss) is used to ascertain the configuration. The ADR should always
be address 63 (+128) for the Ss command.
In response to the command, the CEC 8000 will return one data byte for each
board address in the system. The data bytes tell the controlling software how
many slots are available, how many slots are in use, and which boards are in
which slots.
CEC 8000 66

The possible data bytes that can be returned for a slot are listed below:
‘0’ – Off Line (there is no board in this slot)
‘1’ – Amplifier
‘3’ – Tachometer PCB
‘6’ – M.O.M.
‘7’ – System Controller
‘8’ – Ignore (filler
‘9’ – Not Possible (See following Note)
Note: If you have a 3U configuration, which provides channels for up to 6
amplifiers, a ‘9; will be returned for channels 7 – 59, indicating that it is not
possible to populate them because they do not exist.
Status Acknowledge Data: Appropriate ASCII status bit
(SA) (Example – SA 256)
Response: None
All status bytes have to be acknowledged. The value is the ASCII number
indicated in Table 5-1. on page 75, regardless of whether the system is
sending out a status or acknowledging a status. The value for Alarm 1, for
example, is always 256. If Alarm 1 is latched and is tripped, the controller must
send a status acknowledge byte with a bit weight of 256 to clear the alarm.
Once the alarm is acknowledged, a new status byte is sent out from the
controller indicating that the status of the alarm has again changed.
Read Error Code Data: None
(Se) Response: ‘0’, ‘1’, ‘2’. ‘3’, ‘4’, ‘5’, ‘6’, or ‘7’
(Example - SE1)
This command is used to read an error when an error bit appears in the status
of a device. The value for an error in the status byte is always 4, regardless of
the device.
Any errors that are encountered are stored in a queue. Up to 16 error codes
can be stored for each device. To increment the queue pointer - that is, to
move it to the next code - the host must first read the error, then
CEC 8000 67

send out a status acknowledge with the error bit set. The error bit will remain
on if there are more error codes in the queue; otherwise, the error bit will clear.
The appropriate responses to possible error codes are listed below:
‘0’ – No Error
‘1’ – Self-Diag Error
‘2’– Communication Error
‘3’ – EE Recall Error
‘4’ – I/O EE Recall Error
‘5’ – I/O Connection Error
‘6’ – DSP Error
‘7’ – Transducer Connect Fault
Status (St) Data: None
Response: Status Message
(Example – ST256)
A status message is sent to the host any time a status change is detected.
The status can also be read at any time by the host. Refer to page 73, CEC
8000 Status Bytes.
Configuration (Sc) Data: None
Response: TYPE{TYPE}
(Example – SC 1 2)
This command is used to ascertain the type of device at a particular address.
Valid device types are listed below:
‘1’ – Amplifier, #0700141
‘2’– Input/Output Board, #0700140
‘3’– Tachometer Board, #0700302
‘5’– Serial/EEE488 Remote Control Card, #0700143)
‘6’– M.O.M.
CEC 8000 68

Note: Because an amplifier board and an input/output board are associated
with the same address, the software will return two device types for
that address (Type ‘1’ and Type ‘2’).
Extended Data: None
Configuration (Sx) Response: TYPE VER REV SERIAL LEVEL
(Example– SX1 3 A 123 1)
This command is used to ascertain the extended configuration of a device at a
particular address. This information includes not only the device type (which
can be obtained using the Sc command) but the version, revision, serial
number, and board level.
TYPE
VER
REV
SERIAL
LEVEL
Note:
Same as ‘Sc’ command.
version (int)
Version of the board. All boards have version numbers. One
version of a board (for example, version- 1) may have more
features than another version (for example, version 1),
depending on the customer’s needs.
revision (char string)
From time to time, CEC makes changes to a board in the form
of enhancements (for example, we might change the value of
a resistor). When this happens, CEC bumps the revision level
(For example, from REV A to REV B).
serial number (long int)
Every board has a long integer (that is, 32-bit) electronicallystored
serial number that is read out and stored when the
board is tested (for example, during the initialization routine).
This is particularly useful in making a correlation between a
bad run and a board that may be developing a problem.
board level (int)
From time to time, CEC adds an additional feature to a board,
thereby enhancing its capability. When this happens, CEC
bumps the board level.
An enhancement that requires a change to a board’s revision
number does not change the overall capability of the board,
whereas an enhancement that requires a change to a board’s
level number does note change its overall capability.
CEC 8000 69

System Mode (SM) Data: Run or Stop
(Example of Write Command – SMS)
Response: None
This command is used to start and stop the system. ‘R’ = Run, ‘S’ = Stop.
Status Interval (SI) Data: 0 – 100
(Example of Write Command – S15)
Response: None
This command is used to set the time (in seconds) between an auto status. An
interval of 0 disables this function. Any other number will cause the addressed
device to transmit a status every n number of seconds.
Default Load (SD) Data: None
(Example of Write Command – SD)
Response: None
The addressed device will load the defaults which are stored on each amplifier.
Software Version (Sv) Data: None
(Example of Read Command – Sv)
Response: ASCII text describing software type and version.
This command returns a brief description of the software running on the
addressed device. There is no Write Sv command.
Balance Option Data: None
(So)
(Example of Read Command - So)
Response: Bit 4=1 if balance option available.
Bit 4=0 if balance option not available.
System GO (SG) Data: None
(Example of Write Command – SG)
Response: None
This command is used to do a balance cycle. Results can be read out using
the Ob command.
CEC 8000 70

Transducer Commands (Format: TX, Tx)
Transducer commands are used to control any parameter having to do with
transducers. The transducer commands have both a read and a write version.
For the sake of clarity, only one version (read or write) for each command
is discussed.
Transducer (TR) Data: ‘V’, ‘S’, ‘D’, ‘T’, ‘B’, ‘J’, ‘C’, ‘R’, ‘G’
(Example – TRV)
Response: None
TR selects the transducer type. Valid values are listed below.
‘V’
‘S’
‘D’
‘I’
‘B’
‘J’
‘C’
‘R’
‘G’
‘M’
Velocity Coil Input – mV/ips (self-generating)
Acceleration Input – single-ended, pc/g (self-generating)
Acceleration Input – differential, pc/g (self-generating)
Velocity Input – mV/ips (constant current)
Velocity Input – mV/ips (voltage excitation)
Acceleration Input – mV/g (constant current)
Acceleration Input – mV/g (voltage excitation)
Velocity Input – backplane route (see TO command)
Acceleration Input – backplane route (see TO command)
Displacement Input - mV/mil
Sensitivity (TS) Data: ‘Sensitivity number’ (floating point number)
(Example – TS10.7)
Response: None
Every transducer has a sensitivity (for example, 10.7) that the manufacturer
supplies. This command is used to enter the sensitivity.
Transducer Units (TU) Data: ‘R’, ‘A’, ‘P’, ‘T’
(Example- TUR)
Response: None
This command is used to specify the input units. If the specified input units are
different from the output units, the software does a mathematical conversion.
Valid parameters associated with this command include:
‘R’
‘A’
‘P’
‘T’
RMS
Average
Peak
Peak-to-Peak
CEC 8000 71

Transducer Units of Data: ‘F’, ‘E’, ‘M’ or ‘N’
Measurement (TM)
(Example- TMF)
Response: None
‘F’
‘E’
‘M’
‘N’
Transducer is English and display is English send ‘TMF’
Transducer is Metric and display is English send ‘TME’
Transducer is English and display is Metric send ‘TMM’
Transducer is Metric and display is Metric send ‘TMN’
This command sets the output unit of measurement for the addressed device.
The choices are metric or standard (English units).
Backplane Route Data: 1 – 8, valid when TR =’G’ or ‘R’, or TD = ‘N’
Number (TO)
(Example- TO1)
Response: None
We can read to or write from the backplane. This command specifies the route
to read to or write from. There are eight possible routes. If you wish, you can
have all thirteen channels read from the same route. The command used to
establish a channel to drive a route in read mode is TR (+ R or G). The
command used to establish the channel to drive a route in write mode is TD +
N.
Note:
Only one channel can drive any one route.
Drive Backplane (TD) Data: ‘O’ (Off) or ‘N’ (On)
(Example- TDN)
Response: None
The command is used to establish a route in write mode. Although multiple
channels can be on the same route, only on channel can drive the route.
Transducer Filter (TF) Data: ‘O’ (Off) or ‘N’ (On)
(Example- TFO)
Response: None
This command turns on or off the 2-pole 16 kHz prefilter for the accelerometer
input. The filter applies only if the TR selection is ‘S’ or ‘D.’
CEC 8000 72

Output Commands (Format: OX, Ox)
Output commands are used to control any parameter having to do with output.
Output commands have both a read and a write version. For the sake of
clarity, only one version (read or write) for each command is discussed.
Output Range (OR) Data: Range Number (Floating point number between 0 and
200)
(Example- OR100)
Response: None
This command is used to establish the full-scale output. You enter the number
for the upper end, which is the maximum output range. The units are
engineering units. If, for example, you are in velocity mode, the units are in
inches per second (ips). If you are in acceleration mode, the units are in g's. If
you are in displacement mode, the units are in mils.
Output Mode (OM) Data: ‘A’, ‘V’, or ‘D’
(Example- OMA)
Response: None
This command is used to establish the output mode. If, for example, you have
acceleration in and you want velocity out, you can select ‘V’, and onboard
integrators will do the conversion for you.
Valid parameters are:
‘A’ –Acceleration
‘V’—Velocity
‘D’—Displacement
Note:
To be in acceleration mode when you have a velocity transducer is
illegal. It is also illegal to be in acceleration mode (or velocity mode)
when you have a displacement input. In other words –
- ‘A’ is invalid if the transducer type in is in velocity or displacement,
and
- ‘V’ is invalid if the transducer type coming in is displacement.
AC Output Full Scale Data: Full scale AC output number (floating point number
Range (OA)
between 0 and 10 V Peak or the equivalent)
(Example- OA10)
Response:
None
This command is used to set the voltage for the full scale AC output. The
system assumes 0 for the lower end, and you enter a value for the upper end –
which is the maximum AC output voltage range.
The value that you enter using this command should never be greater than the
equivalent of 10 V peak (which is the maximum AC output voltage if the output
units are in peak). If, for example, the output units are in RMS, the maximum
value should not exceed 7.7 RMS—which is equivalent to 10 V peak.
CEC 8000 73

DC Output Full scale Data: Full scale DC output number (floating point number
Range (OD)
between 0 and 10 V DC or the equivalent)
(Example—OD 10)
Response: None
This command is used to set the voltage for the full scale DC output. The
system assumes 0 for the lower end, and you enter a value for the upper end –
which is the maximum DC output voltage range.
Output Units (OU) Data: ‘R, ‘A’, ‘P’, or ‘T’
(Example – OUR)
Response: None
This command is used to specify the output units. If the specified output units
are different from the input units, the software does a mathematical conversion.
Valid parameters associated with this command include:
‘R’
‘A’
‘P’
‘T’
RMS
Average
Peak
Peak-to-peak
Frequency Output Data: Frequency minimum (a floating point number)
Minimum (0 Volts) (ON)
(Example – ON500.00)
Response: None
This command is used to establish the frequency at which 0 V is achieved.
Given a range of 0 to 10 Volts, for example, it is not necessary to have 0 Hz
equal 0 Volts (which is the default). If you choose, you can have 500 Hz (or
any other value) equal 0 Volts. The software will then appropriately span the
voltage range between the two points – that is, between 500 Hz and the upper
limit of the frequency range (which you can specify using the OX command).
Frequency Output Data: Frequency maximum (a floating point number)
Maximum (10 Volts)
(Example – OX1500.00)
(OX) Response: None
This command is used to establish the frequency at which the maximum output
voltage is achieved. Given an output voltage range of 0 to 10 Volts, for
example, the default is to have 10 Volts equal 5k Hz. It is just as valid,
however, to set the maximum to another value, for example 1500 Hz.
Adjusting your minimum and maximum frequency outputs to span a smaller
range (for example, between 500 and 1500 Hz) provides a higher resolution
output.
Vibration Level (Ov) Data: None
Response: OV xxx.xx (a floating point number)
(Example – OV505.39)
This command is used to read the vibration level. The number that is returned
is in engineering units. In order, therefore, for the number to be meaningful,
CEC 8000 74

you must know what mode you are in (which tells you what the engineering
units are).
If, for example, you are in acceleration mode, this command will return the
number of g’s; if you are in velocity mode, this command will return the number
of inches per second; and, if you are in displacement mode, this command will
return the number of mils.
Peak Vibration Data: None
(Sweep or Balance Mode) Response: OK xxx.xx (a floating point number)
(Ok)
(Example—OK505.39)
In Sweep or Balance mode, this command is used to read the peak vibration
level. The number that is returned is in engineering units. In order, therefore,
for the number to be meaningful, you must know what mode you are in (which
tells you what the engineering units are).
If, for example, you are in acceleration mode, this command will return the
number of g’s; if you are in velocity mode, this command will return the number
of inches per second; and, if you are in displacement mode, this command will
return the number of mils.
Frequency Data: None
(Tracking, Sweep or Response: OF xxx.xx (a floating point number)
Balance Mode) (Of)
(Example – OF250.00)
The Of command reads the center frequency of the filter during Tracking,
Sweep, or Balance mode.
Phase (Balance Mode) Data: None
(Op) Response: OP 0 – 360 degrees
(Example – OP182)
In Balance mode, this command is used to read the phase (which will be a
number between 0 and 360 degrees). Refer to Table 5-2 on page 77 (under
Balance Mode) for detailed information.
Frequency (of peak Data: None
Vibration) (Oq) Response: OQ xxxx.x (a floating point number)
(Example – OQ5437.2)
In Sweep or Balance mode, this command is used to determine the frequency
at which the peak vibration occurs.
Note:
The Ok command is used to determine the peak vibration.
Refer to Table 5-2 on page 77 for detailed information.
CEC 8000 75

Reset peaks (OK) Data: None
Response: None
(Example – OK)
This write command clears the peak frequency and peak vibration registers.
Batch Output (Ob) Data: None
Response: Ob xxx.x xxx.x xxxx xxxx xx.x (all floating point)
(Example – OB 1.00 1.22 537 555 36.0)
This command is used to read (in this order) vibration, peak vibration,
frequency, peak frequency, and phase. Not all data is valid in all modes. For
example, phase is only valid in the balance mode and a ‘SG’ command has
been issued. See the specific commands (Ov, Ok, Of, Oq, and Op) for detailed
description of each data field.
Filter Commands (Format: FX, Fx)
Filter commands are used to control any parameter having to do with filters.
Filter commands have both a read and a write version. For the sake of clarity,
only one version (read or write) for each command is discussed below.
Filter Enable (FE) Data: ‘O’ or ‘N’
(Example – FEN)
Response: None
The command , FE, Filter Enable, is used to enable a filter. There are two data
values associated with this command, ‘O’ (Off) and ‘N’ (On).
Filter Mode (FM) Data: ‘F’, ‘V’, ‘T’, ‘S’, or ‘B’
(Example – FMT)
Response: None
The filter mode must be specified. A filter can have one of five possible
modes:
‘F’ – Fixed Bandpass mode
‘V’ – Variable Bandpass mode
‘T’ – Tracking
‘S’ – Sweep mode
‘B’ – Balance mode
The modes are described in Table 5-2.
CEC 8000 76

Table 5-2: Filter Modes
Mode
Fixed Bandpass mode
Variable Bandpass mode
Tracking mode
Sweep mode
Balance mode
(Optional)
Function
In this mode, you select the low pass frequency from a list of
low pass frequency cutoffs and the high pass frequency from
a list of high pass frequency cutoffs. The filter then passes
everything that falls between the low and high pass cutoffs
and attenuates all other frequencies at a rate of 60 dB/octave.
The high and low pass frequency cutoffs are listed in Tables
5.3 and 5.4 on pages 80 and 83, respectively.
In this mode, you set the center frequency (anywhere
between 5 Hz and 5 kHz) and the bandwidth. The filter will
then pass everything on both sides of the center frequency
equal to ½ or less of the bandwidth.
This is similar to Variable mode. The only difference is that a
tachometer input sets the center frequency. In tracking
mode, therefore, the filter follows or tracks the tachometer
input.
The user still sets the bandwidth. The bandwidth can either
be a fixed value or a percentage of the center frequency – in
the latter case, the bandwidth increases as the center
frequency increases.
In sweep mode, the software sweeps through a range of
frequencies specified by the user. The user also specifies the
sweep increments and the length of time the software will
examine each increment.
Generally, in this mode, the engine speed and therefore
vibration input are constant. The purpose of sweep mode is
to look for the source of a problem.
Like Tracking mode, this optional mode also runs off a
tachometer. The user provides a single reference point from
0 to 360 degrees. Using the reference point, the software
can then provide the number of degrees relative to the
reference point at which a peak vibration occurs. This mode
is used for balancing blades within the engine.
In addition to the two filter commands already discussed, there are a number of
filter commands which are mode-dependent – that is, valid only for a particular
mode specified in Table 5-2.
CEC 8000 77

Fixed Mode Filter The fixed mode filter commands are used to enable the high and low
Commands pass filters, then to select their fixed cutoff values. This second task is
accomplished in two steps. First, you specify the table from which you want to
select the high and low pass filter cutoffs. Then you select the cutoffs.
The fixed mode filter commands are summarized below.
Filter 1 Enable (FH) Data: ‘O’, ‘N’
(Example – FHN)
Response: None
This command enables the filter 1 cutoff set by the FI command. Valid values
are:
‘O’ – Off
‘N’ – On
Filter 2 Enable (FL) Data: ‘O’, ‘N’
(Example – FLN)
Response: None
This command enables the filter 2 cutoff set by the FO command. Valid values
are:
‘O’ – Off
‘N’ – On
Filter Table Select (FR) Data: ‘A’, ‘B’
(Example – FRA)
Response: None
This command is used to specify the Table (either Table A or Table B) from
which you want to select the low pass and high pass filter cutoffs. Tables A
and Table B are listed on pages 80 and 83, respectively.
Balance Offset (FU) Data: (0-360)
Example-FU25)
Response: None
Used to add fixed offset to balance (in degrees).
CEC 8000 78

Filter 1 Cutoff (FI) Data: Select from Filter Table A or Table B (see pages 80 and
83).
(Example – FI20)
Response: None
After you enable the filter (using the FH command), the FI command is used to
select the cutoff.
Note:
The FI command – as well as the F2 command – can be used to select
either the low pass or the high pass filter cutoff. The software does not
care which command you use to select which cutoff. Also, if desired,
you can select a high pass cutoff without selecting a low pass cutoff,
and vice versa.
To select a high pass cutoff, of – say, 500 Hz – from Table A, you would enter
236. This instructs the system to attenuate frequencies that are less than 500
Hz.
Note:
It does not make sense, of course, to select low pass/high pass filter
cutoffs that do not define a range of values. Therefore, the high pass
cutoff should always be less than the low pass cutoff.
Nor does it make sense to define two low pass filter cutoffs or two high
pass filter cutoffs (although the software will allow you to do so). If you
enter two low pass cutoffs (for example, 80 Hz and 85 Hz), the
software will read the 80 Hz cutoff.
Filter 2 Cutoff (FO) Data: Select from Filter Table A or Table B (see pages 80 and
83, respectively)
(Example – FO210)
Response: None.
This command is the same as the FI command, except if FI is used to select
the low pass filter cutoff, FO is used to select the high pass filter cutoff, and
vice versa – if FI is used to select the high pass filter cutoff, FO is used to
select the low pass filter cutoff. Refer to the Filter 1 Cutoff (FI) command.
CEC 8000 79

Table 5-3: Filter Table A
Command Type Cutoff Response
1 Low Pass 50 Hz Inverse Chebyshev
2 Low Pass 55 Hz Inverse Chebyshev
3 Low Pass 60 Hz Inverse Chebyshev
4 Low Pass 65 Hz Inverse Chebyshev
5 Low Pass 70 Hz Inverse Chebyshev
6 Low Pass 75 Hz Inverse Chebyshev
7 Low Pass 80 Hz Inverse Chebyshev
8 Low Pass 85 Hz Inverse Chebyshev
9 Low Pass 90 Hz Inverse Chebyshev
10 Low Pass 95 Hz Inverse Chebyshev
11 Low Pass 100 Hz Inverse Chebyshev
12 Low Pass 110 Hz Inverse Chebyshev
13 Low Pass 120 Hz Inverse Chebyshev
14 Low Pass 130 Hz Inverse Chebyshev
15 Low Pass 140 Hz Inverse Chebyshev
16 Low Pass 150 Hz Inverse Chebyshev
17 Low Pass 160 Hz Inverse Chebyshev
18 Low Pass 170 Hz Inverse Chebyshev
19 Low Pass 180 Hz Inverse Chebyshev
20 Low Pass 190 Hz Inverse Chebyshev
21 Low Pass 200 Hz Inverse Chebyshev
22 Low Pass 225 Hz Inverse Chebyshev
23 Low Pass 250 Hz Inverse Chebyshev
24 Low Pass 275 Hz Inverse Chebyshev
25 Low Pass 300 Hz Inverse Chebyshev
26 Low Pass 325 Hz Inverse Chebyshev
27 Low Pass 350 Hz Inverse Chebyshev
28 Low Pass 375 Hz Inverse Chebyshev
29 Low Pass 400 Hz Inverse Chebyshev
30 Low Pass 425 Hz Inverse Chebyshev
31 Low Pass 450 Hz Inverse Chebyshev
CEC 8000 80

Command Type Cutoff Response
32 Low Pass 475 Hz Inverse Chebyshev
33 Low Pass 500 Hz Inverse Chebyshev
34 Low Pass 600 Hz Inverse Chebyshev
35 Low Pass 700 Hz Inverse Chebyshev
36 Low Pass 800 Hz Inverse Chebyshev
37 Low Pass 900 Hz Inverse Chebyshev
38 Low Pass 1000 Hz Inverse Chebyshev
39 Low Pass 1250 Hz Inverse Chebyshev
40 Low Pass 1500 Hz Inverse Chebyshev
41 Low Pass 1750 Hz Inverse Chebyshev
42 Low Pass 2000 Hz Inverse Chebyshev
43 Low Pass 2250 Hz Inverse Chebyshev
44 Low Pass 2500 Hz Inverse Chebyshev
45 Low Pass 2750 Hz Inverse Chebyshev
46 Low Pass 3000 Hz Inverse Chebyshev
47 Low Pass 3250 Hz Inverse Chebyshev
48 Low Pass 3500 Hz Inverse Chebyshev
49 Low Pass 3750 Hz Inverse Chebyshev
50 Low Pass 4000 Hz Inverse Chebyshev
51 Low Pass 4250 Hz Inverse Chebyshev
52 Low Pass 4500 Hz Inverse Chebyshev
53 Low Pass 4750 Hz Inverse Chebyshev
54 Low Pass 5000 Hz Inverse Chebyshev
201 High Pass 5 Hz Inverse Chebyshev
202 High Pass 10 Hz Inverse Chebyshev
203 High Pass 15 Hz Inverse Chebyshev
204 High Pass 20 Hz Inverse Chebyshev
205 High Pass 25 Hz Inverse Chebyshev
206 High Pass 30 Hz Inverse Chebyshev
207 High Pass 35 Hz Inverse Chebyshev
208 High Pass 40 Hz Inverse Chebyshev
209 High Pass 45 Hz Inverse Chebyshev
CEC 8000 81

Command Type Cutoff Response
210 High Pass 50 Hz Inverse Chebyshev
211 High Pass 55 Hz Inverse Chebyshev
212 High Pass 60 Hz Inverse Chebyshev
213 High Pass 65 Hz Inverse Chebyshev
214 High Pass 70 Hz Inverse Chebyshev
215 High Pass 75 Hz Inverse Chebyshev
216 High Pass 80 Hz Inverse Chebyshev
217 High Pass 85 Hz Inverse Chebyshev
218 High Pass 90 Hz Inverse Chebyshev
219 High Pass 95 Hz Inverse Chebyshev
220 High Pass 100 Hz Inverse Chebyshev
221 High Pass 110 Hz Inverse Chebyshev
222 High Pass 120 Hz Inverse Chebyshev
223 High Pass 130 Hz Inverse Chebyshev
224 High Pass 140 Hz Inverse Chebyshev
225 High Pass 150 Hz Inverse Chebyshev
226 High Pass 160 Hz Inverse Chebyshev
227 High Pass 170 Hz Inverse Chebyshev
228 High Pass 180 Hz Inverse Chebyshev
229 High Pass 190 Hz Inverse Chebyshev
230 High Pass 200 Hz Inverse Chebyshev
231 High Pass 250 Hz Inverse Chebyshev
232 High Pass 300 Hz Inverse Chebyshev
233 High Pass 350 Hz Inverse Chebyshev
234 High Pass 400 Hz Inverse Chebyshev
235 High Pass 450 Hz Inverse Chebyshev
236 High Pass 500 Hz Inverse Chebyshev
237 High Pass 600 Hz Inverse Chebyshev
238 High Pass 700 Hz Inverse Chebyshev
239 High Pass 800 Hz Inverse Chebyshev
240 High Pass 900 Hz Inverse Chebyshev
241 High Pass 1000 Hz Inverse Chebyshev
CEC 8000 82

Table 5-4: Filter Table B
Command Type Cutoff Response
1 Low Pass 1000 Hz Inverse Chebyshev
2 Low Pass 2000 Hz Inverse Chebyshev
3 Low Pass 3000 Hz Inverse Chebyshev
4 Low Pass 4000 Hz Inverse Chebyshev
5 Low Pass 5000 Hz Inverse Chebyshev
6 Low Pass 6000 Hz Inverse Chebyshev
7 Low Pass 7000 Hz Inverse Chebyshev
8 Low Pass 8000 Hz Inverse Chebyshev
9 Low Pass 9000 Hz Inverse Chebyshev
10 Low Pass 10000 Hz Inverse Chebyshev
11 Low Pass 11000 Hz Inverse Chebyshev
12 Low Pass 12000 Hz Inverse Chebyshev
13 Low Pass 13000 Hz Inverse Chebyshev
14 Low Pass 14000 Hz Inverse Chebyshev
15 Low Pass 15000 Hz Inverse Chebyshev
16 Low Pass 16000 Hz Inverse Chebyshev
17 Low Pass 17000 Hz Inverse Chebyshev
18 Low Pass 18000 Hz Inverse Chebyshev
19 Low Pass 19000 Hz Inverse Chebyshev
20 Low Pass 20000 Hz Inverse Chebyshev
21 Low Pass 21000 Hz Inverse Chebyshev
22 Low Pass 22000 Hz Inverse Chebyshev
23 Low Pass 23000 Hz Inverse Chebyshev
24 Low Pass 24000 Hz Inverse Chebyshev
25 Low Pass 25000 Hz Inverse Chebyshev
201 High Pass 1000 Hz Inverse Chebyshev
202 High Pass 2000 Hz Inverse Chebyshev
203 High Pass 3000 Hz Inverse Chebyshev
204 High Pass 4000 Hz Inverse Chebyshev
205 High Pass 5000 Hz Inverse Chebyshev
206 High Pass 6000 Hz Inverse Chebyshev
CEC 8000 83

Command Type Cutoff Response
207 High Pass 7000 Hz Inverse Chebyshev
208 High Pass 8000 Hz Inverse Chebyshev
209 High Pass 9000 Hz Inverse Chebyshev
210 High Pass 10000 Hz Inverse Chebyshev
211 High Pass 11000 Hz Inverse Chebyshev
212 High Pass 12000 Hz Inverse Chebyshev
213 High Pass 13000 Hz Inverse Chebyshev
214 High Pass 14000 Hz Inverse Chebyshev
215 High Pass 15000 Hz Inverse Chebyshev
216 High Pass 16000 Hz Inverse Chebyshev
217 High Pass 17000 Hz Inverse Chebyshev
218 High Pass 18000 Hz Inverse Chebyshev
219 High Pass 19000 Hz Inverse Chebyshev
220 High Pass 20000 Hz Inverse Chebyshev
221 High Pass 21000 Hz Inverse Chebyshev
222 High Pass 22000 Hz Inverse Chebyshev
223 High Pass 23000 Hz Inverse Chebyshev
224 High Pass 24000 Hz Inverse Chebyshev
225 High Pass 25000 Hz Inverse Chebyshev
CEC 8000 84

Variable Mode Filter There are two variable filter commands, FB and FC. They are discussed
Commands below.
Tracking Filter Data: Type = ‘P’ or ‘F’
Bandwidth (FB)
Bandwidth = 2 to 100 Hz if F; 1 to 5% if P
(Example – FBP 5)
Response: None
FB is used to set the tracking filter bandwidth. The bandwidth can be either a
fixed number or a percentage of the center frequency. If it is a fixed number,
the bandwidth can be from 2 to 100 Hz, and you can set it in 1 Hz increments.
If it is a percentage of the center frequency, the bandwidth can be 1% through
5% of the center frequency.
Center Frequency (FC) Data: 5.0 – 5000.0 Hz (this is a floating point number)
(Example – FC100.7)
Response: None
FC is used to set the center frequency. The center frequency can be set
anywhere from 5.0 Hz to 5 kHz, and you can set it in .1 Hz increments.
Tracking Mode Filter
Commands
There are four tracking mode filter commands, FB, FN, FX, and FT.
Data:
Response:
Type: ‘F’ or ‘P’
(Bandwidth: 2 to 100 Hz if F; 1 to 5% if P)
(Example – FBF 100)
None
FB is used to set the tracking filter bandwidth. This can be either a fixed value
or a percentage of the center frequency. If it is a fixed value, the bandwidth
can be from 2 to 100 Hz, and you can set it in 1 Hz increments. If a
percentage of the center frequency, the bandwidth can be 1% through 5% of
the center frequency.
Bandwidth Minimum (FN) Data: 2 – 100 Hz
(Applies to percentage bandwidth only)
(Example – FN25)
Response: None
This command is used to set the minimum bandwidth when the tracking filter
bandwidth is calculated as a percentage of the center frequency. If you set the
minimum bandwidth to 5 Hz, for example, the CEC 8000 will not narrow the
bandwidth less than 5 Hz.
CEC 8000 85

Bandwidth Maximum (FX) Data: 2 – 100 Hz
(Applies to percentage bandwidth only)
(Example – FX 75)
Response: None
This command is used to set the maximum bandwidth when the tracking filter
bandwidth is calculated as a percentage of the center frequency. If you set the
maximum bandwidth to 25 Hz, for example, the CEC 8000 will not widen the
bandwidth to more than 25 Hz.
Tachometer Number (FT) Data: 1 – 4
(Example—FT1)
Response: None
This command is used to select the tachometer you are using.
Filter Order (FF) Data: Filter Order (1—4)
(Example—FF3)
Response: None
This command sets the tracking filter order. This is the tracking filter multiple.
The tracking filter frequency is set at the RPM rate times this number.
Sweep Mode Filter
Commands
There are eight sweep mode filter commands. Each is discussed below.
Tracking Filter Data: Type – ‘F’ or ‘P’
Bandwidth (FB)
Bandwidth – 2 to 100 Hz if F; 1 to 5% if P
(Example – FBF 75)
Response: None
FB is used to set the tracking filter bandwidth. The tracking filter bandwidth
can be either fixed value or a percentage of the center frequency. If it is a fixed
value, the bandwidth can be from 2 to 100 HZ, and you can set it in 1 Hz
increments. If it is a percentage of the center frequency, the bandwidth can be
1% through 5% of the center frequency.
Bandwidth Minimum (FN) Data: 2 – 100 Hz
(Applies to percentage bandwidth only)
(Example – FN50)
Response: None
This command is used to set the minimum bandwidth when the sweep filter
bandwidth is calculated as a percentage of the center frequency. If you set the
minimum bandwidth to 5 Hz, for example, the CEC 8000 will not narrow the
bandwidth to less than 5 Hz.
CEC 8000 86

Bandwidth Maximum (FX) Data: 2 – 100 Hz
(Applies to percentage bandwidth only)
(Example – FX50)
Response: None
This command is used to set the maximum bandwidth when the sweep filter
bandwidth is calculated as a percentage of the center frequency. If you set the
maximum bandwidth to 25 Hz, for example, the CEC 8000 will not widen the
bandwidth to more than 25 Hz.
Steps (FP) Data: 1 – 100.0 Hz (a floating point number)
(Example – FP25)
Response: None
This command is used to specify how many Hz you want to jump each time
while sweeping the bandwidth. Refer to Table 5-2 on page 87 for an
explanation.
Delay Between Steps (FD) Data: 1 – 60000 (1000=1 sec delay)
(Example – FD1000)
Response: None
This command is used to specify how many milliseconds you want to stay at
each level in sweep mode. Refer to Table 5-2 on page 87 for an explanation.
Sequence (FS) Data: ‘M’, ‘X’, ‘R’, ‘S’, ‘U’, ‘D’
(Example – FSM)
Response: None
This command is used to select the sweep mode sequence. Valid values
include:
‘M’ – Once after each filter enable, min to max
‘X’ – Once after each filter enable, max to min
‘R’ – One full cycle, min to max and then back
‘S’ – One full cycle, max to min and then back
‘U’ – Continuous, min to max
‘D’ – Continuous, max to min
Refer to Table 5 – 2 on page 88 for an explanation.
Sweep Frequency Data: 5 – 5000 Hz
Minimum (FA)
(Example – FA100)
Response: None
This command is used to select the minimum frequency at which to begin in
sweep mode. Refer to Table 5-2 on page 87 for an explanation.
CEC 8000 87

Sweep Frequency Data: 5 – 5000 Hz
Maximum (FZ)
(Example – FZ1000)
Response: None
This command is used to select the maximum frequency at which to stop in
sweep mode.
Balance Mode Filter
Commands
As in Tracking mode, there are four valid commands in Balance Mode:
FB, FN, FZ, and FT. Refer to Table 5-2 on page 87 for an explanation.
Tracking Filter Data: ‘P’ or ‘F’
Bandwidth (FB)
2 to 100 Hz if F; 1 to 5% if P
(Example – FBF 50)
Response: None
FB is used to set the tracking filter bandwidth. This can be either a fixed value
or a percentage of the center frequency. If it is a fixed value, the bandwidth
can be from 2 to 100 Hz, and you can set it in 1 Hz increments. If it is a
percentage of the center frequency, the bandwidth can be 1% through 5% of
the center frequency.
Bandwidth Minimum (FN) Data: 2 – 100 Hz
(Applies to percentage bandwidth only)
(Example – FN50)
Response: None
This command is used to set the minimum bandwidth when the Balance mode
filter bandwidth is calculated as a percentage of the center frequency. If you
set the minimum bandwidth to 5 Hz, for example, the system will not narrow
the bandwidth to less than 5 Hz.
Bandwidth Maximum Data: 2 – 100 Hz
(FX) (Applies to percentage bandwidth only)
(Example – FX100)
Response: None
This command is used to set the maximum bandwidth when the Balance mode
filter bandwidth is calculated as a percentage of the center frequency. If you
set the maximum bandwidth to 25 HZ, for example, the system will not widen
the bandwidth to more than 25 Hz.
Tachometer Number Data: 1 – 4
(FT)
(Example – FT2)
Response: None
This command is used to select the tachometer you are using.
CEC 8000 88

Filter Order (FF) Data: Filter Order (1-4)
(Example – FF3)
Response: None
Alarm Commands (Format: AX, Ax)
This command sets the tracking filter order. This is the tracking filter multiple.
The tracking filter frequency is set at the RPM rate times this number.
The commands used to set the alarm parameters are discussed below. There
are four software alarms but only alarms 1 and 2 have hardware output. Some
of the commands, as indicated below, can be used with all four alarms, and
some can be used with only alarm 1 or alarm 2.
Alarm commands have both a read and a write version. For the sake of clarity,
only one version (read or write) for each command is discussed.
Enable (AE) Data: Alarm Number (1—4) +
‘O’ Off
‘N’ On
(Example – AE2 O)
Response: None
This command enables/disables a specified alarm.
Form (AF) Data: Alarm Number (1 or 2) +
‘O’ normally open
‘C’ normally closed
(Example – AF2 O)
Response: None
This command defines the normal (non-tripped) state of alarm. If normallyopen,
the alarm trips to the closed state; if normally closed, the alarm trips to
the open state.
Latching (AL) Data: Alarm Number (1 – 4)
‘Y’ latched
‘N’ not latched
(Example – AL2 Y)
Response: None
This command defines whether an alarm will be latched or non-latched. When
set to latched, the alarm, once tripped, stays on until you acknowledge it, either
through the computer or M.O.M. If you do not acknowledge it, the alarm
remains energized, even though the alarm condition no longer exists.
When set to Non-latched, the alarm, once tripped, will automatically turn off
when the alarm condition no longer exists.
CEC 8000 89

Ascending Value (AD) Data: Alarm Number (1 – 4) +
‘Y’ ascending value trigger
‘N’ descending value trigger
(Example – AD2 Y)
Response: None
This command defines whether the alarm will trip when the amplitude rises
(ascending) above the trigger level, or when the amplitude falls (descending)
below the trigger level.
Trip Level (AT) Data: Alarm Number (1 –4) +
Trip level data (a floating point number)
(Example – AT1 1.25)
Response: None
This command defines the level (in engineering units) at which the alarm will
trip.
Alarm Delay (AW) Data: Alarm Number (1—4) +
Delay value (a floating point number)
(Example – AW2 5.0)
Response: None
This command defines the amount of time during which the signal must stay
below or above the trip level (as the case may be) before the alarm will trip.
For example, if you select a delay of 2 seconds, the alarm condition must exist
for at least 2 seconds before the alarm will trip.
Hysteresis Level (AH) Data: Alarm Number (1 –4) +
Hysteresis Data (a floating point number)
(Example – AH2 5.0)
Response: None
This command defines the amplitude below or above the trip level at which the
alarm, once tripped, deactivates. If the alarm trips on the ascending level, the
deactivation level equals the trip level minus the hysteresis. If the alarm trips
on the descending level, the deactivation level equals the trip level plus the
hysteresis.
Tachometer Commands
(Format: PX, Px)
The ADR for a tachometer command should always be 60 ( i.e. 60 + 128).
Because there are four tachometers on the tachometer board, you must
specify with tachometer you are addressing when you send a command.
The tachometer commands have both a read and a write version. For the sake
of clarity, only one version (read or write) for each command is discussed
below.
CEC 8000 90

Tachometer Enable (PN) Data: Tachometer Number ( 1—4) +
‘O’ (Off) or ‘N’ (On)
(Example – PN1 N)
Response: None
This command enables the tachometer specified. Tachometers that are not
being used should be kept Off.
Tachometer Ratio (PR) Data: Tachometer Radio ( 1—4) +
Ratio (a floating point number)
(Example – PR1 43.0)
Response: None
Tachometers are not usually one pulse per revolution; rather, they are multiple
pulses per revolution or a fraction of a pulse per revolution. This command is
used to specify the tachometer ratio – that is, the approximate numbers of
pulses per one revolution. It can be any number between 0.01 to 9999.99.
This number must be entered in order for the system to properly calculate the
frequency.
Tachometer Edge (PE) Data: Tachometer Number (1 –4) +
‘L’ Leading, or
‘T’ Trailing
(Example – PE1 L)
Response: None
In cases where it matters (it may not matter), this command is used to specify
which tachometer edge will be tightly controlled – that is, which edge you want
to trigger from. If you specify leading edge, the leading edge will be used. If
you specify trailing edge, the trailing edge will be used.
Tachometer Frequency (Ps) Data: Tach Number ( 1—4)
Response: 1 – 4 (tach number)
PS xxx.xx (a floating point number)
(Example – PS1 155.56)
This command is used to read the tachometer speed. You can also read the
tachometer speed from its associated amplifier using the Of command.
Tachometer Frequencies (Pb) Data:
Response:
None
PB xxxx xxxx xxxx xxxx
(Example – PB 555 10001 0 0)
This command is used to read all 4 tachometer speeds with one command. All
tach speeds may not be valid depending on the enable status.
CEC 8000 91

Chapter 6
Calibrating the CEC 8000
Overview
Calibrating the CEC 8000 is a simple and straight-forward procedure. Using an
input signal of known frequency and voltage, you measure selected outputs,
then enter them into the system. Based on the value of the known input, the
calibration program calculates expected outputs, and compares them with the
actual, measured values.
The program then determines the percentage of error and makes any
necessary adjustments. The adjustments are not made permanent, however,
until you instruct the program to save them.
Chapter topics
This chapter covers the following topics:
Topic
See Page
The Calibration Program 93
The Calibration Procedure 94
CEC 8000 92

The Calibration Program
The calibration program is a stand-alone program that does not require the C-
CATS or any other software. Before you can calibrate the CEC 8000, you
need to install the calibration program (CP 8000).
Installing the To install the Calibration Program under Windows, insert the CP 8000
Calibration Program CD into the appropriate drive, click Run and type the following:
D:\install
The program will prompt you for the information it needs to proceed.
Starting Up the
Calibration Program
Once you have installed the calibration program, you are ready to
start it up. To do so, click the CP 8000 icon. The following screen appears:
Figure 6-1. Calibration Program Screen.
File Setup Help
CP-8000
CEC C-CATS
CP-8000
START
Next, click the Start button. The program will display a series of screens for
calibrating the CEC 8000.
CEC 8000 93

The Calibration Procedure
After you start the calibration program, a series of screens is displayed. Each
screen provides detailed instructions on how to proceed.
Initial Calibration
Screen
The initial screen is shown below.
Figure 6-2. Initial Calibration Screen.
File Setup Help
CP-8000
Calibrate
Apply a reference sinusoidal signal at the BNC connector of the
8000 and enter the reference frequency and millivolt level.
Recommended frequency is 250 Hz.
Frequency (Hz):
250.1
Voltage (mV):
354.73
Ok
Cancel
The above screen explains how to start the calibration procedure. The
instructions are outlined in the following table.
CEC 8000 94

Step Action
1 First, inject a reference sinusoidal signal into the BNC connector
(located at the rear of the CEC 8000 above the power cord input.
See Figure 6-3 below). The recommended frequency is 250 Hz;
and the recommended voltage is 350 mV.
2 Using a meter you know to be accurate and stable, measure the
frequency of the reference signal. Then type the frequency into
the Frequency (Hz) field.
Note: It is important that you type in the exact frequency.
3 Next, measure and type in the voltage of the reference signal.
Again, it is important that you type in the exact frequency.
4 Click OK.
Figure 6-3. Calibration Reference Signal Input.
Calibration Signal Input
CEC 8000 95

Selecting Channels After you complete the initial calibration screen and click OK, the
and Steps calibration program polls the CEC 8000 to ascertain which channels are
available. The following screen appears.
Figure 6-4. Channel/Step Selection Screen.
File Setup Help
CP-8000
Calibrate
Select the channels and steps for the calibration:
Channels:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Select all channels
Steps:
Normalized Output
No Integration
Acceleration to Velocity Integration
Velocity to Displacement Integration
Both Integrators
Filtered Output
DC Output
Select all steps
Ok
Cancel
Referring to above screen, notice that, in this example, only two channels (that
is, channels 2 and 6) are available. The remaining channels have been
dimmed to indicate that they are empty. Notice, also, that there are seven
calibration steps. The above screen is used to select the channels to be
calibrated and the calibration steps.
Do the following to complete the screen:
Step Action
1 Select each channel you desire to calibrate, or click the Select
All Channels button to calibrate all available channels.
2 Select each calibration step you desire to use in the calibration
procedure, or click the Select All Steps button to use all steps
in the calibration procedure.
3 Click OK.
CEC 8000 96

Measuring
Normalized Output
Voltage
If you selected the step, Normalized Output, the following screen
appears.
Figure 6-5. Normalized Output Screen.
File Setup Help
CP-8000
Calibrate
Channel 6
Normalized Output
Monitor the Normalized Output (typically J1-H
on the standard I/O card). Enter reading in AC
millivolts (xxx.xx).
Voltage (mV):
176.87
Ok
Exit
Do the following to complete the screen:
Step Action
1 If you are using the standard CEC I/O board, measure the
normalized output voltage at J1-H, and enter the result in AC mV
(xxx.xx)
2 If you are using a custom I/O board from CEC, measure the
normalized output voltage at the location specified in the board’s
manual, and enter the result in AC mV (xxx.xx).
3 Click OK.
CEC 8000 97

Measuring Scaled
Output: No Integration
If you selected the step, No Integration, the following screen appears.
Figure 6-6. Scaled Output Screen: No Integration.
File Setup Help
CP-8000
Calibrate
Channel 6
No Integration
Monitor the Scaled Output (typically J1-F on the
standard I/O card). Enter reading in AC millivolts
(xxx.xx).
Voltage (mV):
353.59
Ok
Exit
The above screen is used to measure the scaled output when all integrators
are turned OFF. Do the following to complete the screen:
Step Action
1 If you are using the standard CEC I/O board, measure the
scaled output voltage at J1-F, and enter the result in AC mV
(format: xxx.xx)
2 If you are using a custom I/O board from CEC, measure the
scaled output voltage at the location specified in the board’s
manual, and enter the result in AC mV (format: xxx.xx).
3 Click OK.
CEC 8000 98

Measuring Scaled
Output:
Acceleration-to-
Velocity Integration
If you selected the step, Acceleration-to-Velocity Integration, the
following screen appears.
Figure 6-7. Scaled Output: Acceleration-to-Velocity Integration.
File Setup Help
CP-8000
Calibrate
Channel 6
Acceleration to Velocity Integration
Monitor the Scaled Output (typically J1-F on the
standard I/O card). Enter reading in AC millivolts
(xxx.xx).
Voltage (mV):
86.59
Ok
Exit
The above screen is used to measure the scaled output when the velocity-todisplacement
integrators are turned ON. Do the following to complete the
screen:
Step Action
1 If you are using the standard CEC I/O board, measure the
scaled output voltage at J1-F, and enter the result in AC mV
(format: xxx.xx)
2 If you are using a custom I/O board from CEC, measure the
scaled output voltage at the location specified in the board’s
manual, and enter the result in AC mV (format: xxx.xx).
3 Click OK.
CEC 8000 99

Measuring Scaled If you selected the step, Velocity-to-Displacement Integration, the
Output: Velocity-to- following screen appears.
Displacement
Integration
Figure 6-8. Scaled Output: Velocity-to-Displacement Integration.
File Setup Help
CP-8000
Calibrate
Channel 6
Velocity to Displacement Integration
Monitor the Scaled Output (typically J1-F on the
standard I/O card). Enter reading in AC millivolts
(xxx.xx).
Voltage (mV):
223.9
Ok
Exit
The above screen is used to measure the scaled output when the accelerationto-velocity
integrators are turned ON. Do the following to complete the screen:
Step Action
1 If you are using the standard CEC I/O board, measure the
scaled output voltage at J1-F, and enter the result in AC mV
(format: xxx.xx)
2 If you are using a custom I/O board from CEC, measure the
scaled output voltage at the location specified in the board’s
manual, and enter the result in AC mV (format: xxx.xx).
3 Click OK.
CEC 8000 100

Measuring Scaled If you selected the step, Both Integrators, the following screen appears.
Output: Both Integrators
Figure 6-9. Scaled Output with Both Integrators.
File Setup Help
CP-8000
Calibrate
Channel 6
Both Integrators
Monitor the Scaled Output (typically J1-F on the
standard I/O card). Enter reading in AC millivolts
(xxx.xx).
Voltage (mV):
59.9
Ok
Exit
The above screen is used to measure the scaled output when BOTH the
acceleration-to-velocity integrators AND the velocity-to-displacement
integrators are turned ON.
Step Action
1 If you are using the standard CEC I/O board, measure the
scaled output voltage at J1-F, and enter the result in AC mV
(format: xxx.xx).
2 If you are using a custom I/O board from CEC, measure the
scaled output voltage at the location specified in the board’s
manual, and enter the result in AC mV (format: xxx.xx).
Note: Because the signal is double-integrated and has been
significantly attenuated at this point, it may be difficult to obtain
an accurate reading. If you are not using a meter that has
filtering, you may need to filter the signal.
3 Click OK.
CEC 8000 101

AC Filtered Output: If you selected the step, Filtered, the following screen appears.
Figure 6-10. Filtered AC Output Screen.
File Setup Help
CP-8000
Calibrate
Channel 6
Filtered Output
Monitor the AC Filtered Output (typically J1-B on
the standard I/O card). Enter reading in AC
millivolts (xxx.xx).
Voltage (mV):
353.6
Ok
Exit
The above screen is used to measure the AC filtered output. Do the following to
complete the screen:
Step Action
1 If you are using the standard CEC I/O board, measure the AC
filtered output voltage at J1-B, and enter the result in AC mV
(format: xxx.xx).
2 If you are using a custom I/O board from CEC, measure the
AC filtered output voltage at the location specified in the
board’s manual, and enter the result in AC mV (format:
xxx.xx).
3 Click OK.
CEC 8000 102

DC Filtered Output: If you selected the step, DC Output, the following screen appears.
Figure 6-11. Filtered DC Output Screen.
File Setup Help
CP-8000
Calibrate
Channel 6
DC Output
Monitor the DC Filtered Output (typically J1-M
on the standard I/O card). Enter reading in AC
millivolts (xxx.xx).
Voltage (mV):
348.9
Ok
Exit
The above screen is used to measure the DC filtered output. This is the main
vibration output. Do the following to complete the screen:
Step Action
1 Set your meter to DC Output.
2 If you are using the standard CEC I/O board, measure the DC
filtered output voltage at J1-M, and enter the result in DC mV
(format: xxx.xx).
3 If you are using a custom I/O board from CEC, measure the
DC filtered output voltage at the location specified in the
board’s manual, and enter the result in DC mV (format:
xxx.xx).
4 Click OK.
CEC 8000 103

Calibration Save The final calibration screen is shown below.
Screen
Figure 6-12. Calibration Save Screen.
File Setup Help
CP-8000
Calibrate
Channel 6
Calibration
Error Percent For Calibration Step(s)
-0.01% :
0.03% :
-0.15% :
0.02% :
-9.42% :
0.03% :
1.36% :
Save Calibration ?
Normalized Output
No Integration
Acceleration to Velocity Integration
Velocity to Displacement Integration
Both Integratots
Filtered Output
DC Output
Yes
No
Ok
Exit
The above screen shows the percent of error for each measurement you
entered. With all integrators OFF, the error percent should be around 0.1% or
less. If you have an integrator on, the error percentage should still be well
within 1%.
Step Action
1 If the error percentages are slight (for example, around .05%),
you will probably want to click NO, then click OK, to avoid
saving them. Small errors are to be expected.
2 If the error percentages are high (for example, 10% or
greater), something is wrong. Usually, this means that either
you misread the meter, or you entered the wrong
measurement. Click NO, then click OK, and run the calibration
program again.
3 If the error percentages are not extremely high, but are of
concern (for example, 1-2%), you may want to save them.
Click YES, then click OK.
CEC 8000 104

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CEC 8000 105

Chapter 7
Troubleshooting
Overview
Chapter topics
The CEC 8000 is designed for optimal trouble-free performance. If, however,
the CEC 8000 does not appear to be functioning, or functioning properly, follow
the instructions in this chapter.
This chapter covers the following topics:
Topic
See Page
What to do if the CEC 8000 is Not Functioning 107
What to do if you get an Erratic Reading 108
Periodic Calibration 109
If You Need to Return the CEC for Repair 109
Technical Assistance
If you need technical assistance, contact:
Customer Service
CEC Vibration Products Inc.
746 Arrow Grand Circle
Covina, CA 91722
Tel: (626) 938-0200
Fax: (626) 938-0202
Within continental US: (800) 468-1345
CEC 8000 106

What to do if the CEC 8000 is Not Functioning
If the CEC 8000 does not appear to be functioning, follow the procedure
outlined below.
Step Action
1 Make sure that the power cord and all cables are
securely plugged in.
2 Make sure that the power is ON.
3 Turn the power OFF, and check the fuses. The CEC
8000 uses a double-fuse, both parts of which must be
operational. See Figure 7-1.
4 With the power still OF, loosen the screws and pull
out and reseat all boards.
5 If none of the above steps resolves the problem, call
Technical Support at (626) 938-0200.
Figure 7-1. Double Fuse Used in CEC 8000.
Fuse Replacement
Always replace the fuse with the same type and rating. The 8000 uses a
double fuse system. Each fuse is a 1.6A SB (5mm x 20 mm) CEC Part #
0700033-90-1008.
CEC 8000 107

What to do if you get an Erratic Reading
If you get an erratic reading for and I/O board, you can do one of two things.
First Alternative
You can turn the power OFF and try swapping the board with that in another
channel.
• If the erratic reading stays on the same channel, then you probably
have a bad transducer or bad cable.
• If the erratic reading moves with the board, then you probably have a
bad board or the board needs to be re-calibrated. (See Chapter 6,
Calibrating the CEC 8000).
Second Alternative
Alternatively, you can run the C-CATS System Test Program (see page 31) to
test the input/output characteristics and isolate the problem.
CEC 8000 108

Periodic Calibration
It is strongly recommended that at least once a year, you run the Calibration
Program (Refer to Chapter 6, Calibrating the CEC 8000) in order to check your
normalized output, your integrators, and so on.
If You Need to Return the CEC 8000 for Repair
If you need to return the CEC 8000 for repair, follow the procedure outlined
below:
Step
Obtain RMA
Number
Describe the
Problem
Give Special
Instructions
If not under
warranty,
specify
invoicing
procedure
Indicate
return
address
Pack
securely and
label
Action
Call the factory for a Return Merchandise
Authorization (RMA) number
Type the RMA number on a sheet of paper and
describe the nature of the problem encountered.
Be as specific and as complete as possible. Too
much information is far better than too little.
If any changes to the equipment have been made,
and you desire to retain the modifications, indicate
this and describe the changes in detail.
If the equipment is not under warranty, indicate
whether repair work may begin immediately or
whether CEC Vibration Products should secure
price approval before proceeding with the repair.
The price will be the same in both cases, but
delay will be minimized by permission to start
work immediately. The order acknowledgement
copy will show the price.
Indicate the exact address to which the equipment
should be returned once it has been repaired.
Carefully pack the CEC 8000 in its original
shipping container, using the original foam inserts.
Make sure that the address label is legible.
Note: If the equipment is not under warranty, all
shipping costs are the responsibility of the owner
of the equipment and not CEC Vibration Products.
CEC 8000 109

Appendix A
Specifications
General Specifications
Electrical
AC voltage range
AC frequency range
Power requirements
3U Chassis
6U Chassis
85 – 265 VAC universal input
47 – 63 Hz
100 watts maximum
150 watts maximum
Mechanical
Mounting
Size
19” Rack Mount
3U – 1 to 6 Channels;
6U – 1 to 14 Channels
Environmental
Operating
Temperature
Humidity
Non-Operating
Temperature
Humidity
0 to 70 o C
0 to 95% RH non-condensing
-55 o C to + 150 o C
0 to 95% RH non-condensing
Vibration and Shock
Normal levels encountered in transporting and handling bench-type laboratory
equipment.
Installation
Installation (over voltage) Category II
Pollution Degree 2
Communications
Standard
RS-232
CEC 8000 110

Channel Specifications
Transducer Inputs
Accelerometers
Input Type
Velocity Coil
Type
Voltage maximum
Input resistance
Calibration
Type
Input resistance
Maximum input
Differential or single-ended for sensitivities
of 1 to 110 pc/g
Differential input for sensitivities of
6 to 1100 mV/ips
10 volts peak
10k ohms
Single-ended sinusoidal signal
50 k ohms, minimum
10 volts peak
Constant Current (ICP)
Single-ended for sensitivities of 6 to 1100 mV
Constant current 6 mA @ 24 VDC provided
Input type resistance
Maximum input
100 k ohms, minimum
10 volts peak
Millivolt
Single-ended input for sensitivities between 6 to 1100 mV
Input type resistance
Maximum input
100 k ohms, minimum
10 volts peak
Tachometer inputs
4 inputs maximum per system
Input Levels
Frequency range
Input impedance
Tachometer ratios
1.0 volt peak, minimum;
(Optional 0.5 volt peak, minimum)
100 volt peak, maximum
5 Hz to 25 kHz
100 k ohms, minimum
0.01 to 999.9999, user-selectable
Amplifier/Filter Outputs
Broadband output
(Normalized to 50 mV/g, ips or mils)
Maximum output voltage 10 volts peak
Maximum load
10 k ohms
Frequency response
2 Hz to 50 kHz ±0.5 db
Amplitude Accuracy ± 0.5%
CEC 8000 111

Channel Specifications
Continued
Scaled Output
Output Voltage
1 Volt peak full scale
Maximum Load
10 k ohms
Accuracy
Frequency & Amplitude Response
Acceleration In /
Acceleration Out:
Velocity In /
Velocity Out:
Acceleration In /
Velocity Out:
Velocity In /
Displacement Out:
Acceleration In /
Displacement Out:
±1% 5 Hz - 5 kHz (32 kHz sample rate)
±1% 5 Hz - 25 kHz (192 kHz sample rate)
±1% 5 Hz - 5 kHz (32 kHz sample rate)
±1% 5 Hz – 25 kHz (192 kHz sample rate)
±1.5% 10 Hz - 5 kHz (32 kHz sample rate)
±1.5% 10 Hz - 25 kHz (192 kHz sample rate)
±2% 20 Hz - 1.5 kHz (32 kHz sample rate)
±2% 20 Hz - 1.5 kHz (192 kHz sample rate)
±2% 20 Hz - 1.5 kHz (32 kHz sample rate)
±2% 20 Hz - 1.5 kHz (192 kHz sample rate)
AC output
Full scale
Maximum output voltage
Maximum load
Accuracy
Scaled 1 – 10 volts in 0.1 volt increments
Full scale selectable from 0.5 – 150 units
(g, ips, mils)
10 volts peak
10 k ohms
See Filtered Specifications
DC output
(Output is a true RMS conversion of the AC output)
Output scale range
Maximum output voltage
Maximum load
Accuracy
1 – 10 VDC in 0.1 increments
10 VDC
10 k ohms
See Filtered Specifications
CEC 8000 112

Channel Specifications
Actual Frequency DC Output
Output is a 1-10 VDC proportional to actual frequency in tracking, sweep, and
optional balance modes.
Minimum frequency
Maximum frequency
Maximum load
0 volts, user selectable
10 volts, user selectable
10 k ohms
Peak Frequency DC Output
Output is a 0 -10 VDC proportional to peak frequency in sweep and optional
balance modes.
Minimum frequency
Maximum frequency
Maximum load
0 volts, user selectable
10 volts, user selectable
10 k ohms
Peak Vibration DC Output
Output is a 0 – 10 VDC proportional to peak vibration in sweep and optional
balance modes.
Minimum vibration
Maximum vibration
Maximum load
0 volts, user settable
10 volts, user settable
10 k ohms
Phase DC Output
Output is a 0 -10 VDC proportional to phase of the peak vibration in optional
balance mode. Output is scaled from 0 o (at 0 volts) to 359 o (at 10 volts)
Maximum load
10k ohms
Alarms
Type
Levels
Delay
Hysteresis
2 alarms per amplifier
SPST: 100mA @ 200 VAC/DC
0 to full scale; ascending or descending
Latching or non-latching
Programmable 0 – 10 seconds in 1 second increments
Programmable (0 to full scale)
CEC 8000 113

Programmable Filter Fixed Filters
Specifications
Type
Pass-Band Ripple
7 th Order Inverse Chebyshev response
Impulse Response; (IIR) filters
Less than 0.2 db
Cutoff Frequency Range
Low pass
High pass
Band pass
Sampling rate
Attenuation
50 Hz to 5 kHz, user-selectable, Table A
1 kHz to 25 kHz, user-selectable, Table B
5 Hz to 1 kHz, user-selectable, Table A
500 Hz to 25 kHz, user-selectable, Table B
Any combination of the above (select one lowpass and
one highpass cutoff from the same sample rate only).
32 kHz, Table A
192 kHz, Table B
>60 db/octave
Variable Filters
Type
Band pass filter
Attenuation
Center freq. operation
Bandwidth
Sampling rate
Pass band ripple
Attenuation
Variable frequency digital FIR multi-rate band pass
Digital Finite Impulse Response
>60 db/octave
5 Hz to 5 kHz, in 0.1 increments
Adjustable
Fixed: 2 Hz to 100 Hz in 1-Hz increments
Percentage: 1% to 5%
32 kHz
60 db/octave
Operating Modes
Variable
Tracking
Sweep
Balance (optional)
Center frequency and bandwidth set by user
Center frequency set by selected tachometer input
Frequency range programmable
Ascending and/or descending
Provides outputs for amplitude, frequency and phase
CEC 8000 114

Programmable Filter
Specifications Continued
AC/DC Output
Accuracy (Filter-Out)
Acceleration In /
Acceleration Out:
Velocity In /
Velocity Out:
Acceleration In /
Velocity Out:
Velocity In /
Displacement Out:
Acceleration In /
Displacement Out:
±1.5% of reading
±1.5% of reading
±2% of reading
±2.5% of reading
±2.5% of reading
AC/DC Output
Accuracy (Filter-In)
Filters can add ± 0.2 db to the reading within the pass band.
Frequency Range ±3db
Minimum Maximum
Acceleration 5 Hz 20 kHz
Velocity 10 Hz 5 kHz
Displacement 20 Hz 1.5 kHz
Full Scale Ranges
Units
Peak, Peak to Peak, RMS, Average
Full Scale Outputs
Acceleration
Velocity
Displacement
0.5 to 150 g
0.5 to 150 ips
0.5 to 150 mils
Tracking Outputs
Amplitude
Frequency
*Phase
*Balance (optional)
0 – 10 VDC = 0 to full scale (user adjustable)
0 – 10 VDC = 5 Hz to 5 kHz (user adjustable)
0 – 10 VDC; 0 o to 359 o
Cal Offset Correction (Pos° or Neg°, user adjustable)
Polar or Rectangular Outputs (user selected)
CEC 8000 115

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CEC 8000 116

Appendix B
Optional Hardware and Software
Overview
The optional hardware and software you can purchase with the CEC 8000 is
described in this appendix.
Optional Hardware Offering
Optional hardware includes the Manual Operation Module (M.O.M.) and the
Tachometer Module.
M.O.M.
Tachometer Module
The Manual Operation Module (M.O.M.) is a version of the power supply which
allows you to operate and reconfigure the system without the use of a
computer. The M.O.M. (see Figure 2-2 on page 12) has a numeric display and
keypad that permit you to monitor and give instructions to the CEC 8000 just as
you would with a computer.
The Tachometer board handles up to four tachometer inputs, and can be
manipulated via the computer or M.O.M.
Optional Software Offering
Additional Operating Mode
Enhanced Programmable
Filter Specifications
The standard offering includes three modes of operation: fixed, variable, and
sweep. The optional balance mode (used to balance the blades within an
engine) provides outputs for amplitude, frequency, and phase.
Optional software provides the ability for enhanced programmable fixed
filter specifications.
The standard, user-selectable frequency range for fixed filters is 50 Hz to 5 kHz
(low pass) and 5 Hz to 1 kHz (high pass).
With Option 1, the user-selectable frequency range for fixed filters is 1 kHz to
25 kHz (low pass) and 500 Hz to 25 kHz (high pass).
Optional Computer Interface The RS-232 board provides the standard interface between the CEC 8000 and
computer.
CEC 8000 117

Index
A
AC Output Full Scale Range (OA) ................................................................73
Address byte .................................................................................................61
Alarm ...........................................................10, 13, 17, 23, 43, 56, 62, 89, 113
Delay .....................................................................................................10, 11
Hysteresis..............................................................................................10, 11
Latched........................................................................................................11
Non-latched.................................................................................................11
Normally closed...........................................................................................11
Normally open .............................................................................................11
Trigger levels...............................................................................................10
Amplifier/Filter module ............................................................................10, 42
Analog ground...................................................................................18, 20, 22
B
Backplane...................................................................................................... 14
Backplane Route Number (TO)..................................................................... 72
Balance mode ............................................................. 18, 51, 75, 88, 113, 117
BNC connector...................................................................... 13, 16, 18, 23, 95
Broadcast address ........................................................................................ 63
C
Cabling .......................................................................................................... 13
Calibration ............................................................................................... 20, 92
Calibration reference signal input.................................................................. 95
C-CATS
Operations screen....................................................................................... 32
Software .............................................................................. 14, 30, 31, 32, 33
System Test Program ................................................................................. 31
CEC 8000...................................................................................... 6, 30, 31, 61
6-Channel System......................................................................................... 6
14-Channel System....................................................................................... 9
Calibration ............................................................................................ 92-104
CEC 8000 118

Calibration Save Screen ........................................................................... 104
Channel/Step Selection Screen .................................................................. 96
Filtered AC Output Screen ........................................................................ 102
Filtered DC Output Screen........................................................................ 103
Initial Calibration Screen ............................................................................. 94
Normalized Output Screen.......................................................................... 97
Scaled Output Screen, No Integration ........................................................ 98
Scaled Output with Both Integrators ......................................................... 101
Scaled Output, Acceleration-to-Velocity Integration ................................... 99
Scaled Output, Velocity-to-Displacement Integration ............................... 100
Commands
Alarm ...................................................................................................... 89-90
Filter ....................................................................................................... 76-89
Format of ..................................................................................................... 61
Output..................................................................................................... 73-75
System ................................................................................................... 66-70
Tachometer ............................................................................................ 90-91
Transducer ............................................................................................. 71-72
Commercial power source ............................................................................ 11
Concealed damage claim................................................................................ 6
Configuration................................................................................................. 30
Constant current transducer.......................................................................... 20
D
DC Output Full scale Range (OD)................................................................. 74
Digital ground ................................................................................................ 18
Digital output ................................................................................................. 18
Drive Backplane (TD).................................................................................... 72
E
Erratic readings ........................................................................................... 108
Extended Configuration (Sx) ......................................................................... 69
F
Filter
Balance modes.............................................................................. 52, 77, 114
CCATS Configuration.................................................................................. 44
Sweep modes................................................................................ 50, 77, 114
Tracking modes............................................................................. 48, 77, 114
Variable modes ............................................................................. 47, 77, 114
Filter Enable (FE) .......................................................................................... 76
Filter Mode (FM)............................................................................................ 76
Filter Table A............................................................................................ 80-82
Filter Table B............................................................................................ 83-84
Fixed Bandpass....................................................................... 45, 77, 114, 117
Frequency (of peak vibration) (Oq) ............................................................... 75
Frequency (Tracking, Sweep or Balance Mode) (Of) ................................... 75
Frequency Output Maximum (10 volts) (OX) ................................................ 74
Frequency Output Minimum (0 volts) (ON) ................................................... 74
CEC 8000 119

Fuses............................................................................................................. 14
H
Help file ......................................................................................................... 14
Hysteresis...................................................................................................... 11
I
ICP Sensor interface ..................................................................................... 20
Input / Output Connectors ........................................................... 17, 20, 21, 22
L
Latched / Non-Latched Alarm ....................................................................... 11
Line filter........................................................................................................ 11
M
Manual Operation Module............................................. 12, 15, 25, 28, 64, 117
Message
data packet.................................................................................................. 61
postamble.............................................................................................. 61, 62
preamble ..................................................................................................... 61
Millivolt input.................................................................................................. 20
N
Noise ................................................................................................. 11, 13, 22
Normalized output ......................................................... 13, 16, 18, 23, 97, 109
O
Output Connector Pins (J1)..................................................................... 18, 19
Output Mode (OM) ........................................................................................ 73
Output Range (OR) ....................................................................................... 73
Output Units (OU).......................................................................................... 74
P
Peak Vibration (Sweep or Balance Mode) (Ok) ............................................ 75
Phase (Balance Mode) (Op) ......................................................................... 75
Piezo transducer input .................................................................................. 22
Power supply................................................................................... 11, 12, 110
Pre-wired connectors .................................................................................... 28
R
Read Error Code (Se) ................................................................................... 67
RS-232 ...................................................................... 13, 15, 25, 26, 28, 61, 63
CEC 8000 120

S
Scaled output ................................................................................................ 18
Screen
Amplifier Setting .......................................................................................... 42
Backplane Routing ...................................................................................... 55
C-CATS Operations .................................................................................... 32
Filter Settings ........................................................................................ 44, 50
Filter Settings, Sweep Mode ....................................................................... 50
Filter Settings, Tracking Mode .................................................................... 50
Filter Settings, Variable Bandpass Mode.............................................. 46, 47
Tachometer Settings ............................................................................. 53, 54
Tracking Mode............................................................................................. 49
Transducer Manager............................................................................. 39, 41
Self test ......................................................................................................... 10
Sensitivity (TS) .............................................................................................. 71
Serial command protocol .............................................................................. 14
Shipping damage ............................................................................................ 6
Space delimiter.............................................................................................. 62
Specifications ....................................................................................... 110-116
Status (St) ..................................................................................................... 68
Status Acknowledge (SA) ............................................................................. 67
Sweep mode ....................................................................... 20, 45, 49, 76, 117
System fault/error.......................................................................................... 10
System Mode (SM)........................................................................................ 70
System Settings Menu .................................................................................. 37
System Snapshot (Ss) .................................................................................. 66
System Sync (Sy).......................................................................................... 66
T
Tachometer ..................................................................... 16, 24, 28, 30, 53, 63
Tachometer Module ...................................................................................... 13
Test lamp....................................................................................................... 10
Tracking mode............................................................................. 10, 45, 47, 76
Transducer .................................................................................................... 32
Transducer (TR)............................................................................................ 81
Transducer I/O Module ..................................................................... 13, 16, 17
Alarm ........................................................................................................... 13
BNC............................................................................................................. 13
Input ............................................................................................................ 13
Output.......................................................................................................... 13
Transducer Input/Output module .................................................................. 10
Transducer inputs.............................................................................. 20, 21, 22
Transducer Units (TU)................................................................................... 71
Transducer Units of Measurement ........................................................... 71
Troubleshooting.................................................................................... 106-109
CEC 8000 121

V
Variable band pass mode ....................................................................... 45, 76
Vibration level (Ov)........................................................................................ 74
Voltage spikes............................................................................................... 11
W
Wiring diagram ........................................................................................ 15, 27
CEC 8000 122