Manuals & Procedures - Wilks Enterprise, Inc.

InfraRan ® Specific Vapor
Analyzer
User’s Guide
InfraRan is a registered trademark of Wilks Enterprise, Inc.
Copyright 2010 Wilks Enterprise, Inc., Norwalk, CT

1. InfraRan Specific Vapor Analyzer Overview ........................................................................................................ 4
1.1. Introduction .................................................................................................................................................. 4
1.2. Basic Measurement Concept ........................................................................................................................ 4
1.3. Analyzer Description ................................................................................................................................... 5
1.4. Analyzer Port Inlet/Outlet Fittings ............................................................................................................... 6
1.4.1. Reducing Pump Outlet Noise................................................................................................................... 6
1.4.2. Instrument Shoulder Strap ....................................................................................................................... 6
2. Getting Started ....................................................................................................................................................... 7
2.1. Analyzer Check ............................................................................................................................................ 7
2.2. Charging the Battery .................................................................................................................................... 7
2.3. Cleaning the Instrument ............................................................................................................................... 8
2.4. Instrument Warm-up .................................................................................................................................... 8
2.5. Power Source ............................................................................................................................................... 8
2.6. Quick Start Instructions ................................................................................................................................ 8
3. Keypad Operations ................................................................................................................................................ 8
3.1. Data Entry Keypad ....................................................................................................................................... 9
3.2. Keypad Menu Operations Map .................................................................................................................... 9
3.2.1. Top Menu ................................................................................................................................................ 9
3.2.2. Analyze Menu ........................................................................................................................................ 10
3.2.3. Run Menu .............................................................................................................................................. 10
3.2.4. Control Menu ......................................................................................................................................... 11
3.2.5. Files Menu ............................................................................................................................................. 12
3.2.6. Setup Menu ............................................................................................................................................ 13
3.2.7. Diag Menu ............................................................................................................................................. 13
3.2.8. Clock Menu ........................................................................................................................................... 14
3.2.9. Analysis Menu ....................................................................................................................................... 14
3.2.10. Log Menu .......................................................................................................................................... 15
3.2.11. Calibrate Menu .................................................................................................................................. 15
3.2.12. Download Menu ................................................................................................................................ 16
3.2.13. Control Menu .................................................................................................................................... 16
3.3. Analysis Modes .......................................................................................................................................... 17
3.3.1. Normal (Analysis) Mode ....................................................................................................................... 17
3.3.2. Fast (Survey) Mode ............................................................................................................................... 17
3.4. Display Operations ..................................................................................................................................... 17
3.4.1. System Indicator .................................................................................................................................... 17
3.4.2. Display Modes ....................................................................................................................................... 17
4. Communications Interface ................................................................................................................................... 18
4.1. USB Port Operation Test ........................................................................................................................... 19
4.2. Downloading Data with RS-232/USB ....................................................................................................... 19
2

4.2.1. Using Windows Hyperterminal Program ............................................................................................... 19
4.2.2. Using the Excel Spreadsheet Download ................................................................................................ 20
4.3. Serial Data Output ...................................................................................................................................... 21
5. Input/Output and Power Connectors .................................................................................................................... 23
6. Battery Removal .................................................................................................................................................. 23
7. Optional Accessory-Analog Output: ................................................................................................................... 24
8. Specifications....................................................................................................................................................... 25
8.1. Operating and Storage Conditions ............................................................................................................. 25
9. Troubleshooting ................................................................................................................................................... 26
10. Service and Customer Support ....................................................................................................................... 27
Figure 1 InfraRan Optical System with 16cm cell .................................................................................................. 4
Figure 2 InfraRan Optical System with 6m cell ................................................................................................... 5
Figure 3 InfraRan Controls and Connections ......................................................................................................... 5
Figure 4 InfraRan Gas Port Fittings ........................................................................................................................ 6
Figure 5 InfraRan Shoulder Straps ......................................................................................................................... 7
Figure 6 InfraRan Keypad and Display .................................................................................................................. 9
Figure 7 Excel Spreadsheet download screen ........................................................................................................ 20
Figure 8 Excel Spreadsheet download COM Port Setting .................................................................................... 21
Figure 9 Analyzer Connections ............................................................................................................................... 23
3

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1. InfraRan Specific Vapor Analyzer Overview
1.1. Introduction
The InfraRan Specific Vapor Analyzer is an analyzer that measures a particular gas or vapor in air at the
parts per million (ppm) level by infrared absorption. The gas or vapor absorbs infrared energy at specific
wavelengths and the amount of energy absorbed is proportional to the gas concentration. The analyzer is
calibrated to read out directly in the desired units.
The analyzer has a rechargeable internal battery pack with a 7 – 8 hr run time. It may also be run from
100 – 250 VAC 50/60 Hz using the charger/power supply.
1.2. Basic Measurement Concept
The InfraRan Specific Vapor Analyzer is an infrared fixed filter analyzer. A broad-band, pulsed infrared
source. The source illuminates the entrance window of a tubular, single pass transmission cell or a folded
path, multipass cell. A portion of the energy is absorbed by the sample. The infrared beam then passes
through an exit window and is focused on an optical filter(s) mounted on a detector that selects the
wavelength required for the analysis. The detector converts the infrared energy to an electrical signal
proportional to the intensity. The signal is processed by a microcomputer and is converted to a real-time
display of the gas concentration in parts per million (ppm). In addition to the display both the original
detector signal(s) and the calculated concentrations are transmitted as an ASCII string through an RS-232
serial or USB port. Figures 1 & 2 below illustrate the theory of operation.
Figure 1 InfraRan Optical System with 16cm cell
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Figure 2
InfraRan Optical System with 6m cell
1.3. Analyzer Description
The following diagrams show the basic components of the InfraRan
Figure 3 InfraRan Controls and Connections
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1.4. Analyzer Port Inlet/Outlet Fittings
The inlet fitting will accept the sample wand fitting and the fitting on the zero filter holder. The outlet
fitting is to reduce noise exiting the gas port block and it can be used to attach an exhaust tube to the
analyzer if the user wishes to purge the gas from the test area. All fittings to the gas analyzer are standard
1/4 NPT ports.
Note: If an analyzer is to be attached to long lengths of tubing for the inlet and outlet, it is advised that an
external pump be used. It is not recommended that an external pump be attached to the internal pump as
this may cause pressure or a vacuum differential that could affect the readings or cause a seal to fail.
Contact Wilks Enterprise if an external pump is needed, in that case an analyzer without an internal
pump can be supplied.
1.4.1. Reducing Pump Outlet Noise
Additional quieting of the pump output may be required for applications in hospitals or locations where
the noise of the outlet pump port may be a problem. A particulate filter, such as the type found on the
sample wand can be attached to the outlet with a short length of tubing.
Figure 4 InfraRan Gas Port Fittings
1.4.2. Instrument Shoulder Strap
The shoulder strap supplied with the instrument is rated for greater weight capacity than the total weight
of the InfraRan gas analyzer and should provide safe carrying of the InfraRan for the lifetime of the
instrument. Care should be taken to ensure that the strap is in good condition and properly used.
Occasionally check the strap hooks for cracks, tears, loose stitching and that the metal safety clip is intact
and operating properly. If there is any doubt about the condition of the strap, it should be replaced.
The strap hook is latched to
the safety clips slot and may
release upon lifting the analyzer.
The clip loop is correctly
engaged by the strap clip and
the safety clip is in its slot.
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Figure 5 InfraRan Shoulder Straps
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2. Getting Started
Customers who have already set up the InfraRan may want to go to section 2.6 below for the Quick
Start instructions. The following instructions are for the initial start up of the InfraRan.
2.1. Analyzer Check
When the instrument is received examine the container for damage. The following should be included in
the contents:
InfraRan Analyzer
Charger - AC Adapter – InfraRan Interconnect Cable
Sampling Hose & Particulate Filer
Zero Filter Assembly
Package of 2 zero filters
Set of Inlet/Outlet Fittings
Power Cord
USB Cable
Instruction Manual
Driver/Utilities CD
Wand Clip
2.2. Charging the Battery
After unpacking, the InfraRan Analyzer should be placed on the charger overnight. Connect charger to
charger port on instrument and allow to charge at least 12 hours. The battery charger is a “smart charger”
that will not overcharge the battery. Please see the charger for an explanation of indicator lights.
Note: The battery should be substantially discharged before recharging to avoid developing memory in
the battery that will reduce its capacity.
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2.3. Cleaning the Instrument
Use damp soapy rag. Do not use solvent. Do not attempt to clean the gas cell. If the cell has become
fouled it will need to be returned to Wilks Enterprise for replacement.
2.4. Instrument Warm-up
The InfraRan should be run with the pump on for a minimum of 30 minutes for the most stable zero prior
to making measurements. Even though the detector voltage continues to vary significantly for about 4
more hours, the InfraRan compensates for this change using the temperature measured by a thermistor
attached to the detector housing. Each time the analyzer zero is determined, a new temperature origin is
recorded and the compensation applied from that point on. During this initial 4 hour period, it is wise to
rezero the InfraRan at least every hour.
2.5. Power Source
When changing the power source from battery to mains power or the reverse, the instrument zero should
always be re-determined.
2.6. Quick Start Instructions
Turn on power. (30 minute warmup)
Select CNTRL then select BATTERY to check battery status
ESCAPE then select ESCAPE
ANALYZE then select REZERO (Prompt for filter)
ZERO (30 second cell flush, 30 second Zero operation)
RUN then select RUN again (requires 2 key presses to avoid unintended start, 30 second
countdown before first reading)
YOU ARE READY TO SAMPLE!
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3. Keypad Operations
A majority of operations will only require the use of the Top Menu described in 3.2.1. For more detailed
operations, each function for each layer of operation is described in this section.
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3.1. Data Entry Keypad
Figure 6 InfraRan Keypad and Display
ENTER
Accepts the current selection and advances to the next item or if there are no more items, exits to
the next higher menu level
CLEAR
Erases data entered in user fields
The down arrow returns to the previous menu item.
The up arrow forwards to the next menu item.
The right arrow enters a text space.
This button toggles between SURVEY (fast) or ANALYZE (normal) modes. Survey
mode has a faster response but higher noise and is useful for detecting areas of high
concentration e.g. near a leak.
3.2. Keypad Menu Operations Map
3.2.1. Top Menu
The top menu display is shown below.
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3.2.2. Analyze Menu
When the ANALYZE key is selected from the top menu display the following Analyzer Menu is displayed
REZERO
Prompts user "INSTALL ZERO FILTER"
The label ZERO will appear after the REZERO key is pressed
Press ZERO key
Timer countdown 30 seconds to introduce fresh air
Timer countdown 30 seconds to zero instrument
Display zero voltage of detector
RUN
Prompts user " INSTALL PARTICULATE FILTER "
Press the RUN key
Timer countdown 30 seconds to introduce sample air then analyzer continues into run mode
LOCATION
Input site location names for the log report with the data entry keypad
Multiple locations can be entered by pressing the up or down arrow keys
Pressing ENTER at any of the location numbers exits the location entry menu
ESCAPE
Returns to prior menu
Note: Defined locations cannot be changed unless the current file is empty. See section 3.2.5 for erase
functions.
3.2.3. Run Menu
When the RUN key is selected from the Analyze Menu display the following Run Menu is displayed
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LOG ON
Toggles logging operations, LOG ON indicates that the logging operation is currently off.
Pressing LOG ON will change the softkey to LOG OFF and display a LOG ON indication on the
top left of the display.
Pressing the LOG OFF softkey toggles the logging functions off and turns off the LOG OFF
indicator on the display. See section 3.2.10 for additional logging functions.
CONTROL
Toggles pump and alarm on/off or displays battery charge condition.
Note: the pump and alarm functions are toggled on/off for the current run. Starting a new run resets these
functions to their normal defaults as set in section 3.2.10 ).
3.2.4. Control Menu
When the CONTROL key is selected from the Run Menu display the following Control Menu is displayed
WILKS INFRARAN
18NOV07
14:30:55
PUMP ON
PUMP OFF
ESCAPE
PUMP
Pump can be turned ON or OFF
WILKS INFRARAN
18NOV07
14:30:55
ALARM ON
ALARM OFF
ESCAPE
ALARM
Alarm can be turned ON or OFF
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WILKS INFRARAN
BATTERY = 100%
18NOV07
14:30:55
ESCAPE
BATTERY
Shows percent of battery power left
WILKS INFRARAN
18NOV07
14:30:55
25% 50% 75% 100%
ESCAPE
BRIGHTNESS
Allows for screen brightness adjustment
ESCAPE
Returns to prior menu
3.2.5. Files Menu
When the FILE key is selected from the top menu display the following Files Menu is displayed
NEW
Enter file name with the alpha numeric keypad.
Press CLEAR to delete current file name.
Press ENTER to accept changes.
ERASE
Prompts user to delete file, press ENTER key to erase data in current file.
ESCAPE
Cancels erase operation and return to prior menu.
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3.2.6. Setup Menu
When the SETUP key is selected from the top menu display the following Setup Menu is displayed
DIAG
Opens up the diagnostic menu which allows the user to check current calibration by injecting a
calibrated gas standard.
Displays system energy and gain number.
CLOCK
Set system time and date.
ANALYSIS
Global settings for the log functions and audible alarm high/low toggles on or off.
Sets system display.
CALIBRATE
Settings containing information on current calibrated gas(s).
ESCAPE
Returns to prior menu.
3.2.7. Diag Menu
When the DIAG key is selected from the Setup Menu display the following Diag Menu is displayed
VERIFY
Prompts calibration standard concentration.
Press ENTER to start verification.
Prompts user to inject standard gas, press RUN to continue.
Press ESCAPE at any time to cancel.
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ENERGY
Prompts user to install zero filter.
Press BEGIN key to continue.
ESCAPE
Returns to prior menu
3.2.8. Clock Menu
When the CLOCK key is selected from the Setup Menu display the following Clock Menu is displayed
DATE
TIME
Set Year - Month - Date with keys on keypad.
Set Hour - Minute - Second with keys on keypad.
ESCAPE
Returns to prior menu.
3.2.9. Analysis Menu
When the ANALYSIS key is selected from the Setup Menu display the following Analysis Menu is
displayed
LOG
Settings for logging functions on/off status, mode and interval.
DISPLAY
Display selection for concentration, %T, and ABS.
ESCAPE
Returns to prior menu.
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3.2.10. Log Menu
STATUS
Global selection to turn logging function on/off.
Selectable log interval, 1 second to 1 minute using the up/down arrows on keypad.
MODE
Select CONTINIOUS or SINGLE logging mode.
INTERVAL
Selectable by up/down arrows on keypad from 1 second to 1 minute.
ESCAPE
Returns to prior menu.
Note: The InfraRan records the maximum, minimum and average concentrations for each logged interval.
3.2.11. Calibrate Menu
When the CALIBRATE key is selected from the Setup Menu display the following Calibration Menu is
displayed
EDIT
Step thru calibration values with the ENTER key on the keypad.
To change values, press CLEAR to erase current value and enter new values thru the alpha
numeric keypad.
Press ENTER to accept the new values.
Calibration Values
Name
y0 #
alpha1 #
k1 #
alpha2 #
k2 #
Factory Set
Factory Set
Factory Set
Factory Set
Factory Set
Factory Set
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Scale Fact # Factory Set
Range # Factory Set
Temp Slope # Factory Set
Precision # User Select
High Alarm # User Select
Low Alarm # User Select
ID Number # User Select
When all the calibration values have been entered or after the last item has been selected with the ENTER
key, the menu will proceed to the prior menu and SAVING CHANGES should visible on the display.
SEL GAS
Using the up/down arrows on keypad step thru gases available and press ENTER to select gas for
measurement. (This menu item is available on multi gas analyzers only).
ESCAPE
Returns to prior menu.
3.2.12. Download Menu
When the DWNLD key is selected from the top menu display the following Download Menu is displayed
FILE
Selecting FILE allows the user to download the current log file to the host computer.
Press ENTER to download file
ESCAPE
Cancels operation and returns to prior menu.
3.2.13. Control Menu
When the CNTL key is selected from the top menu display the following Control Menu is displayed
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PUMP
Toggles analyzer pump on or off.
ALARM
Toggles alarms on or off.
BATTERY
Displays percent of charge on analyzer battery.
BRIGHT
Selectable display brightness from 25% to 100% (set to 25% for best battery life)
ESCAPE
Returns to prior menu.
Note : Setting the pump or alarms either on or off, effects their operation at all times. If the pump or
alarms are turned off, they will not operate until they are turned on in RUN mode using the CONTROL
softkey.
3.3. Analysis Modes
3.3.1. Normal (Analysis) Mode
In normal analysis mode, reported data are the result of a rolling average of 16 measured values over a
period of about 24 seconds. The display is updated at each data point. The value will lag the sample
concentration by a few seconds but noise will be reduced.
3.3.2. Fast (Survey) Mode
Fast mode is entered and exited by pressing the light bulb button on the lower right corner of the keypad.
The display shows “Fast Response” when this mode is enabled. The fast mode is intended for detecting
leaks or “hot” spots. The measurements are not signal averaged. In this mode the display is considerably
noisier than in the normal mode but response is faster.
3.4. Display Operations
3.4.1. System Indicator
LOW BAT
This warning appears in the indicator area when the battery is low and will soon require a charge
3.4.2. Display Modes
The concentration display changes depending on the relationship between the measured concentration and
the control parameters.
Concentration in normal range
Concentration above alarm level
Concentration above Calibrated Range
Concentration above Mathematical Range
Normal Display
Flashing Display
Inverted Display
Asterisks replace digits
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4. Communications Interface
The InfraRan has both USB and RS-232 serial interfaces. In the Run mode the current readings are
transmitted as comma delimited strings every second. See Section 4.3 for the data format. Data recorded
internally using the logging functions, Sections 3.2.3 and 3.2.10, are downloaded using the same interface
and communications protocol. See Section 4.2.
Note: For XP or earlier versions.
1. Plug in the USB cable from the host computer to the InfraRan USB mini B port.
2. The host computer will come up with a dialog box, noting that it has found new hardware and asking
where to find the driver.
3. Place the driver/utilities CD into the host computer CDROM drive and continue with the driver
installation by directing the Windows driver dialog box to the driver directory on the CDROM
4. After the installation of the driver, confirm that a new COM port has been added to the host computer.
In the Control Panel on your computer, select the SYSTEM icon.
Click on the Hardware Tab and then click on the Device Manager Button.
Confirm that an additional COM port has been added the host computer. It will be identified as a "USB
Serial Port".
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4.1. USB Port Operation Test
To confirm the proper operation of the USB COM port, start the Windows Hyperterminal program in the
Start - Programs - Accessories - Communications menu. Configure Hyperterminal to communicate with
the COM port allocated to the USB serial port.
The port configuration is as follows:
9600 Baud
1 Stop bit
No Parity
No Flow Control
With the InfraRan USB cable plugged in and the analyzer on, press ANALYZE then RUN. After the
analyzer has started the RUN cycle, a continuous stream of data should be now displayed on
hyperterminal. This will confirm the proper operation of the USB port.
4.2. Downloading Data with RS-232/USB
Download Data Report After recording data using the SETUP - ANALYSIS - LOG - STATUS selection
you can download the data file to a host computer in one of two ways.
4.2.1. Using Windows Hyperterminal Program
Start the Hyperterminal program on your computer, by clicking on Start – Programs – Accessories and
Communications.
1. Configure 9600 Baud Rate, 8 Bits, No Parity, 1 Stop Bit
2. Select Transfer (computer)
3. Select Capture Test, name file then hit start
4. Select DWNLD on the InfraRan keypad, select FILE then hit ENTER for the download. Observe
the data transfer on your computer
5. Select transfer on your computer
6. Select Capture Test then hit stop
7. Escape to hyperterminal File List, select File Saved from the name chosen in #3, and notepad will
be opened
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4.2.2. Using the Excel Spreadsheet Download
Note: Before using the spreadsheet program, the cheapcomm program (available on the CD provided
with the InfraRan) must be loaded first.
Open the spreadsheet data log report by starting EXCEL and then using File - Open from the
EXCEL menus. Or the data logger can be started by double clicking on the
InfraRan_log_report_xxx.xls file on the CDROM.
Always use “Save As” to save completed log files, so as not to over write the master
InfraRan_log_report_xxx.xls file.
Once the data logger has loaded, click the Enable Macros button.
COM Port
Download Button
Figure 7 Excel Spreadsheet download screen
Change the COM port number to the correct port that the InfraRan USB port is assigned.
Click on the current COM port assignment in the "Enter Serial Port" box.
Change the COM number in the fx formula bar and press ENTER.
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Change COM port number here
COM3
Click here
Figure 8 Excel Spreadsheet download COM Port Setting
Start the download process clicking on the Download Report button.
Click OK on the next dialog box, Excel will now wait for the InfraRan to start the download.
To start download, Click OK then on the InfraRan DWNLD >Files >ENTER.
OK
Cancel
Start the data transfer, by pressing the Download then Files key on the InfraRan followed by
ENTER on the keypad.
The Excel program should now display Transfer In Progress in the Download report button.
After the transfer is complete, the InfraRan can be disconnected from the host PC.
The data is now in the host PC and will be formatted in Excel.
Note : Large log files will take a few moments to transfer to the host PC. Very large log files could take
quite a long time for Excel to format. The process time will depend on the speed of the host PC used.
4.3. Serial Data Output
The InfraRan analyzer outputs a constant asci stream on the rs232 and USB ports when the RUN is
initiated via the ANALYZE Menu. The stream can be used to input specialized or custom applications
on a host PC to perform analysis functions external to the InfraRan analyzer. Or to perform
external logging functions.
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The data stream:
13MAR09, 12:29:11, 2.7553, 0, 0.0077, 2.7535, 20.67, 123
Field 1 2 3 4 5 6 7 8
1. Date, DDMMMYY.
2. Time, HH:MM:SS.
3. Buffered voltage value from detector.
4. Value displayed on InfraRan VFD display.
5. Absorbance value.
6. Unbuffered voltage value from detector.
7. Temperature value from internal thermistor (Celsius).
8. Analyzer I.D. (this field is only enabled when a value is entered via the SETUP - CALIBRATE
Menu on the InfraRan)
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5. Input/Output and Power Connectors
Figure 9 Analyzer Connections
_________________________________________________________________________________________
6. Battery Removal
1. Place the analyzer on its side,
remove the 4 retaining screws and
the battery door.
2. Loosen the two thumb screws on
the battery cover.
Swing the cover out and lift out
the cover from its retaining slot.
3. Press in on the bottom or top of
the battery and lift out of the battery
compartment.
Figure 10 Battery Removal
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7. Optional Accessory-Analog Output:
The InfraRan Specific Vapor Analyzer can be equipped with an optional analog output that is available
through a BNC connector on the end of the analyzer below the standard terminal block. The analog
signal range is 0 – 5 Vdc. This signal is proportional to the digital concentration value that is displayed
on the vacuum fluorescent display and reported in the serial data string. It is generated by an eight bit
digital-to-analog converter (DAC). The correspondence between the analog signal and the digital value is
determined by the Range setting found in the Setup->Calibrate->Edit menu. Some typical values are
shown below.
Selected Range Concentration @ 5V Concentration Step Size
2 ppm 2 ppm 0.0078 ppm
5 ppm 5 ppm 0.0196 ppm
10 ppm 10 ppm 0.0392 ppm
50 ppm 50 ppm 0.196 ppm
100 ppm 100 ppm 0.392 ppm
500 ppm 500 ppm 1.96 ppm
It is the responsibility of the user to keep track of the correspondence between the analog signal level and
the concentration.
Analog Output
Connector center conductor
(+) Pos.
0 - 5
V D C
Shell of connector
( - ) Gnd
24

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8. Specifications
ITEM
Instrument Type
Power Requirements(Battery Charger-external operating supply)
Battery Pack Rechargeable, Nickel Metal Hydride
Dimensions
Weight
Enclosure
Instrument Type
Optics:
Cell
Photometer
SPECIFICATION
Single Beam Infrared Spectrometer
100-250V AC 50/60 Hz
12V, 9 A mp-hr capacity
15 x 7.3 x 7.5 inches, 38 x 18.5 x 19 cm
18 lbs, 8.2 kg
High Impact Polymer
Single Beam Infrared Spectrometer
Polished aluminum tube or gold mirror
multiple pass
Fixed band pass
Filter
Pyroelectric detector
Cell Pathlength
16 cm or 6.0 meters (dependent on gas
and concentration range being measured
Sample Cell Volume 18.1cm3(16 cm)or .45 liters (6.5 m)
Sample Flow
3L/min Typical (16 cm cell)
10L/min Typical (6.0 m cell)
Gas Purge
5 cell volumes for 99% gas exchange
Measurement Cycle
Source
Communications
Communications protocol
Concentration Alarm
Key Pad
Display updated every 1.5 seconds
Pulsed thin-film element
RS-232, DB 9 connector
USB, Mini B connector
9600 baud, 8,N,1
Two level settable audible alarm and
visual display alarms
20 Key tactile keypad
8.1. Operating and Storage Conditions
OPTIMUM NORMAL STORAGE
Temperature 23±2 o C (73±4 o F) 5 - 40 o C (40-120 o F) -20 - +60 o C (5 - 140 o F)
Relative Humidity 50±10% 2 – 95% non-condensing 0-100% non-condensing
25

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9. Troubleshooting
1. Number Displayed at the End of a Zero Cycle
At the end of a zero cycle (initiated with Analyze->Rezero->Zero), the number displayed following
ZERO = is the voltage from the first detector. This value should be between 1 and 4.5 V.
If it is:
Between 0.5 and 1 V and the sample is known to be anesthetic-free air then cell contamination, probably
due to dust or lint, is likely. Useful measurements should still be possible for a short time but instrument
noise can be expected to increase. The analyzer should be returned to Wilks Enterprise for service and
recalibration as soon as possible.
Between 0.1 and 0.5 V and the sample is known to be anesthetic-free air then either the cell has suffered
severe contamination or some optical components have moved due to a severe mechanical shock.
Instrument noise will be high and measurements will be of questionable value. The analyzer must be
returned to Wilks Enterprise for repair and recalibration.
Between 0 and 0.1 V and the sample is known to be anesthetic-free air then either some optical
components have been dislodged by a severe mechanical shock, optical components (source, detector, gas
cell) or electronic components have failed. Useful measurements will not be possible. The analyzer must
be returned to Wilks Enterprise for repair and recalibration.
2. Negative Readings for an Anesthetic are Displayed
Negative readings for an anesthetic indicate that a zero was performed with a sample that contained an
anesthetic or another material that absorbs the infrared wavelengths used for the analysis. The most likely
reasons for this are that either a zero gas filter was not used or the filter that was used is saturated with
anesthetic. Replace the filter with one from a new package and repeat the zero cycle.
For nitrous oxide analysis, the zero gas filter is not effective. In this case a zero sample must be collected
in an area that is free of nitrous oxide. A suitable location is often a hallway outside the operating suite
and well away from the recovery room. If nitrous oxide analysis continues to give trouble, it is a good
idea to establish the analyzer zero in an area far removed from the operating suite, recovery room and any
rooms occupied by post surgery patients and then to measure the nitrous oxide levels in the hallways
closer to the operating suite in order to identify well ventilated areas that can reliably be expected to be
free of nitrous oxide.
3. The InfraRan is Unresponsive to Anesthetics
Remove the sample wand and filters. Cover first the inlet and then the outlet fitting with a finger. Verify
that you can feel a slight vacuum at the inlet and a slight positive pressure at the outlet. If there is no
indication of either pressure or vacuum, check that the InfraRan is in Run mode. Press Control->Pump.
If Pump Off is highlighted press the key under Pump On to turn the pump on. You should be able to
hear the pump and feel vacuum at the inlet and pressure at the outlet.
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If the pump fails to operate or if there is either no vacuum at the inlet or pressure at the outlet, the
InfraRan must be returned to Wilks Enterprise for repair.
4. Display is Blank or Garbled
If the display is not functioning properly the InfraRan must be returned to Wilks Enterprise for repair.
5. Some or All Keypad Keys Do Not Function
The InfraRan must be returned to Wilks Enterprise for repair.
_________________________________________________________________________________________
10. Service and Customer Support
Your InfraRan ® Specific Vapor Analyzer may have been purchased either directly from Wilks
Enterprise or from a local dealer or representative. For help with any difficulties or problems associated
with operation you are recommended to contact your local representative or dealer first. If the analyzer
was purchased direct, or if there are problems that are unanswered by the local representative, or you have
a technical question about the operation of the instrument or to the analysis, please contact Wilks
Enterprise at the contact address provided below:
Customer Services Department
Wilks Enterprise, Inc.
25 Van Zant Street, Suite 8F
Norwalk, CT 06855
USA
Telephone : (203) 855 - 9136
FAX : (203) 838 - 9868
E-mail : tech@wilksir.com
Wilks Enterprise, Inc. . 25 Van Zant Street, Suite 8F . East Norwalk, CT 06855 . www.WilksIR.com
Tel: 203-855-9136 . Fax: 203-838-9868 . info@wilksir.com . tech@wilksir.com
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