SPECTROTILT IItm â Dual Axis Inclinometers - DJ Stork Drives AB

SPECTROTILT II tm – Dual Axis Inclinometers 

The SPECTROTILT tm II family of Dual Axis Inclinometers combine 

the SP 5000 Series sensor with CMOS or custom designed 

hybrid signal conditioning circuitry. The result is a high 

performance / low cost dual axis inclinometer which can tackle 

the most demanding applications. All models are temperature 

compensated to the full industrial range, and feature null 

and scale adjustments (factory set). The open architecture 

construction makes them ideal for OEM applications, and 

for easy installation into custom enclosures. An optional flame 

retardant, molded ABS plastic enclosure is available for the 

SSY0090P and SSY0091P models (*see note below). 

Specifications 

Model #SSY0091P shown above 

Characteristic 

Model 

SSY0090 SSY0091 SSY0090C SSY0091C SSY0090P SSY0091P 

Range (arc degrees) +/-45 +/-20 +/-45 +/-20 +/-45 +/-20 

Output (Vdc, referenced to input common) +/-7 +/-7 +1 to +4 +1 to +4 +1 to +4 +1 to +4 

Input Voltage (Vdc, unregulated) +/-11 to +/-16 +/-11 to +/-16 +5, +/-5% +5, +/-5% +4.85 to +16 +4.85 to +16 

Input Current (mA) 12 12 1.5 1.5 1 1 

Resolution (arc degrees) 0.02 0.005 0.01 0.01 0.01 0.01 

Repeatability (arc degrees) 0.01 0.01 0.01 0.01 0.01 0.01 

Output Ripple 

% of signal value 0.2 0.2 0.2 0.2 - - 

mV RMS - - - - 0.5 0.5 

Accuracy (arc degrees) 

at 10 degrees - +/-0.06 - +/-0.06 - +/-0.06 

at 20 degrees - +/-0.6 - +/-0.6 - +/-0.6 

at 30 degrees +/-2 - +/-2 - +/-1 - 

at 45 degrees +/-5 - +/-5 - +/-5 - 

Settling Time (mSec @ 20 degrees C) 500 

Temperature Range (degrees C) 

Operating -20 to +70 

Storage -40 to +80 

Temp. Coefficient of Null (arc seconds / deg.C) 20 10 20 10 20 20 

Temp. Coefficient of Scale (%/deg.C typ.) 0.1 0.1 0.1 0.1 0.1 0.1 

Null Adjustment Range +/-1 +/-1 +/-0.2 +/-0.2 +/-0.2 +/-0.2 

Weight (grams/approx.) 36 34 36 34 15 15 

*Note: Part numbers for available models with ABS plastic housing are as follows. 

• SSY0090P w/housing = p/n SSY0194 


SPECTRON SYSTEMS TECHNOLOGY INC. 

595 OLD WILLETS PATH 

HAUPPAUGE NY 11788 

PHONE: 631 582-5600 

FAX: 631 582-5671 

Specifications are subject to change without notice! 

www.spectronsensors.com 

Doc.# SDS-122-5208


Dimensions, Electrical Connections, and Adjustments 

SSY0090 and SSY0091 

SSY0090C and SSY0091C 




PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SDS-122-5208


SSY0090P and SSY0091P 

ABS Plastic Housing version 






PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SDS-122-5208

SPECTROTILT tm II 

MICRO-50 – Dual Axis Digital Inclinometer 

The Spectrotilt tm II – MICRO 50 is a Dual Axis Digital 

Inclinometer, which delivers an RS232 output. It 

combines the quality and reliability of the SP 5000 

Series tilt sensor, with a microprocessor and 12 bit A 

to D converter. It features the same open architecture 

as the rest of the Spectrotilt tm II family, which 

facilitates easy mounting and installation. The output 

easily interfaces with most PLC and PC controllers, 

and is ideal for noisy environments and long cable 

runs. The MICRO-50 is available in three standard 

angular ranges, and also with custom fluid viscosities 

and calibration. 

Applications 

• Safety Systems (Manlifts, Roll-over protection) 

• Wheel Alignment (Caster and Chamber measurement) 

• Platform Monitoring and Control 

• Machine Leveling 

General Specifications 

Input voltage ………………………….+7.0 to +30Vdc 

Input current …………………………. 5mA @ +12Vdc 

Settling time ……………. …..…….. 500 mSec 

Null offset adjustment …………….... programmable 

Operating Temp range …………….. -20 to +70 degC 

Storage Temp Range ………….…... -40 to +90 degC 

Temp. Coefficient of Null ……….. 10 arc sec / deg C 0 

Temp Coefficient of Scale ……… 0.1% / deg C o (typ) 

Model# 

Linear Range 

(degrees) 

Total Range 

(degrees) 

Linearity 

(typ. @ 50% lin. range) 

MICRO-50-D20 +/-20 +/-35 1% 

MICRO-50-D45 +/-45 +/-50 4% 

MICRO-50-D70 +/-45 +/-60 consult factory 

(cont’d) 

Model 

Scale Factor 

(factory calibration) 

Output at Null 

(counts) 

MICRO-50-D20 800 cts @ 10 degrees 2048 

MICRO-50-D45 1,800 cts. @ 45 degrees 2048 

MICRO-50-D70 1,900 cts. @ 60 degrees 2048 

Communication Protocol 

Baud rate ……………………..…… 19200 

Parity ……………………………….... none 

Data width …………….…………….. 8 bits 

Flow control ………………………… none 

Stop bit ……………………………… 1 

* Consult factory for detailed communication protocol information! 

Ordering Information 

Linear Range [Total Range] Model# 

+/-20 0 [+/-35 0 ] MICRO-50-D20 

+/-45 0 [+/-50 0 ] MICRO-50-D45 

+/-45 0 [+/-60 0 ] MICRO-50-D70 




PHONE: 631 582-5600 

FAX: 631 582-5671 

Specifications subject to change without notice! 

Doc.# SDS-102-2104

SPECTROTILT tm II 

MICRO-50 – Dual Axis Digital Inclinometer 

Dimensions, Electrical Connections, and Adjustments 




PHONE: 631 582-5600 

FAX: 631 582-5671 


Doc.# SDS-102-2104

Application Note 

SSY0135 - RS232 (MICRO-50) Signal Conditioner Operating 

Instructions 

The following Application Note details the process for connecting an .SH. Series (Ceramic) Electrolytic Tilt 

Sensor to the SSY0135-XX Signal Conditioning Module, and the communication protocol. The .XX at the end 

of the part number will denote the actual type sensor used. 

General Specifications 

Resolution 

Current supply 

Stability over temperature 

Temperature resolution 

Operating temperature 

Response Time 

Clock Speed 

12 bits 

5 mA @ 12VDC 

+/- 2bits 

1 Deg Celsius 

-20C + 70C 

25 ms 

10Mhz 

Sensor Connections 

The sensor leads should be soldered to the circuit board in the following manner. 

SINGLE AXIS SENSOR 

3 

1 

2 

connector 

1 

pot 




PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SAN-207-0607



Instructions 

Input/Output Connections 

Circuit Board 

Connection JP3 

Function 

Corresponding PC 

Serial Port 

connection * 

Pin # Pin # 

1 Input = +7 to +30Vdc none 

2 Ground 5 

3 Output Data 2 

4 Input Command 3 

* A DB9 type connector is required to connect to the PC serial port (not supplied) 

Communication Protocol 

All functions are available in the single axis configuration. The serial port is setup for the following protocol. 

RS232C 

Baudrate 19200 

Data width 8 bits 

Stop bit 1 

Parity none 

Flow Control none 

Commands 

All the commands have to be sent in the upper case mode in ASCII format. 

A 

B 

C 

D 

E 

F 

G 

H 

I 

Reset board 

Read Pitch ( not used in single axis configuration) 

Read Roll 

Read Temperature 

Reserved 

Stores offset for the roll and pitch 

Reserved 

Send calibration data 

Turn off excitation 

When the A command is sent to the SSY0135, it resets itself, and sends back the ASCII character 'R' when it is ready to 

accept a new command. 

B and C command will be followed by 4 bytes. The first 3 bytes will be ASCII characters, representing the angle in 

Hexadecimal (to translate into an angle see the calibration sheet). The last byte is the Line Feed 10 (A in hexadecimal). 




PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SAN-207-0607



Instructions 

When F is received the unit turns off the sensor excitation. It stores the next 4 characters (ASCII format) as an offset for 

the pitch axis (not used in single axis configuration), and then stores the next four characters for the roll axis. The values 

are stored in the nonvolatile memory of the microcontroller in hexadecimal format. Once the microcontroller has stored the 

values in its memory, it restarts the excitation and sends .R. to the host. It will take 20 seconds to read a stable output 

from the time the excitation is turned back on. This is equivalent to turning the unit power on. 

The microcontroller will do a two.s complement addition with the reading from the analog to digital converter. It should be 

noted that when the offset is added to the result of the analog to digital converter the output on the end of the scale can 

change the sign. 

H tells the signal conditioner to send to the host, in the following order, the pitch offset, the roll offset and the temperature 

coefficient. The temperature coefficient is set to 1 and is reserved for future extensions. 

I command turns off the excitation to the microcontroller. This allows the user to save power. It will take 20 seconds for the 

measurement to be stable once the excitation is turned on. The excitation is turned back on when the microprocessor is 

reset with the command A or the power is turned off and on. 

D command will connect the output of the temperature sensor to the amplifier.s input. The SSY0135 will send the data 

with the same format as for the pitch and roll. The gain adjustment does not affect the temperature measurement.. The 

scale factor is 1 counts per Degree Celsius (160 (0A0Hex) AT 25). 

Circuit Block Diagram 

VCC 

Tilt axis 

Enable Temperature 

t 

THERMISTOR 

JP1 

1 

2 

3 

4 

4 HEADER 

Voltage regulator 

VCC 

Sensor 

3 4 

1 2 

5 

Amplifier 

R20 

Gain 

5PIN 

Voltage converter 

Serial link adapter 

RS232 format 

Data in 

Data out 

Microprocessor Unit 

Data 

Ctrl. 

12 bits Analog to 

Digital 

Converter 

Note . Gain Adjustment is accomplished by adjusting the potentiometer (R20) on the circuit board. 




PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SAN-207-0607



Instructions 

Connecting to a PC 

The output of the MICRO-50 can be read directly with a PC by using Hyper-terminal. Setup Hyper-terminal the following 

way. HyperTerminal is located in the folder Programs\Accessories\Communications. The setup is found in the menu File 

‘Properties’. 

In the window "Connect using", select the serial port the MICRO-50 is attached to. Press the button to configure. 

Setup as follows: 

bits per second = 19200 

data bits = 8 

parity = none 

stop bits = 1 

Flow control = none 

The output of the SSY0135 is ASCII characters, in Hexadecimal format (see COMMANDS above). 

Example 

For instance at 0 degree tilt the output of the unit is 800(HEX). To convert it in decimal use this equation: 

First byte * 16^2 + Second byte * 16 + third byte 

8*16^2 + 0*16 + 0 = 2048 

If the unit is tilted and the output is A11 the conversion in decimal is : 

(10) A*16^2 + 1*16 + 1 = 2577 

The output can be converted to an angle the following way : 

(2577-2048)* (the scale factor provided with the unit calibration sheet). 

To linearize the SSY0135 for a dual axis sensor type SP50XX, use the following characteristic equation: 

Coeff3 X output^3 + Coeff2 X output^2 + Coeff1 X output 

The following are the coefficients: 

60 degrees angle 

Coeff1 = 0.0468 

Coeff2 = 0 

Coeff3 = -0.000000004 


Coeff1 = 0.03125 

Coeff2 = 0 

Coeff3 = -0.000000002 


Coeff1 = 0.0129 

Coeff2 = 0 

Coeff3 = -0.0000000003 

The output when the sensor is at 0 degrees is 2048. 2048 should be subtracted from the output before applying the 

equation. 




PHONE: 631 582-5600 

FAX: 631 582-5671 



Doc.# SAN-207-0607

SPECTROTILT tm II - Dual Axis Tilt Monitor / NEMA IV 

The SPECTROTILT tm II Dual Axis Tilt Monitor combines 

the popular SP5000 Series Dual Axis Tilt Sensor, with 

integral signal conditioning and a NEMA IV rated 

enclosure, to bring high precision tilt monitoring to the 

harshest of environments. Available in a variety of 

standard angular sensing ranges, performance levels, 

and input/output configurations, this extremely rugged 

waterproof enclosure provides the unparalleled 

protection required for year after year of worry free 

operation. The null position reference surface, to which 

the sensor is factory calibrated, eliminates installation 

guesswork, while the vast array of interface options 

facilitates easy system integration. 

Electrical Options 

Physical Dimensions mm (inches) 

Ranges 

• +/-20 degrees 



Input Voltage Ranges 

• +5Vdc, +/-5% 

• +4.85 to +16Vdc (unregulated) 

• +11 to +16Vdc (unregulated) 

Outputs 

• +/-1.5Vdc 

• +/-7Vdc 

• 4 to 20ma 

Electrical Termination 

• Standard = 6ft. cable 

(jacketed/shielded, 26awg conductors) 

• Optional = molded connector 

Note: some particular combinations may not be available. Consult factory. 

Specifications 

Repeatability ……………….…. 0.01 degrees 

Resolution ………………….…. 0.005 degrees 

Settling Time ……………….… 500ms 

Operating Temp. Range ……. 0 o to +80 o C 

Weight …………………………. 3 lbs. 

Ordering Information 

Part number = SSY0018 

Custom Designs 

Spectron can design a Tilt Monitor to meet your 

particular application. Custom sensing ranges 

(single or dual axis), and numerous other 

input/output configurations are available, including 

RS232. Please consult the factory for more 

details! 




PHONE: 631 582-5600 

FAX: 631 582-5671 


Doc.# SDS-121-1703

SPECTROTILT IItm â Dual Axis Inclinometers - DJ Stork Drives AB

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