Rev. 06/2012

Sensoric 4-20 mA Transmitter Board
Operation Manual

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

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ContentFeatures
Operation Manual
Technical Data
Mechanical Dimensions

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

Remarks & Contact information2

Features

Soldered sensor cell(non replaceable)

Button for reset andrecalibration ofzero and span

2 wire power supply;
screw terminal;
2 possible orientations

Potentiometer for
optional recalibration

Mounting hole(3 mm)

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

alternative:40-200 mV output

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Operation Manual - Introduction
The Transmitter is a small though robust device which converts the raw sensor signal of anelectrochemical sensor cell into a standard 4..20 mA output. Additionally, the output
signal is converted by an on-board resistor into a 40..200 mV voltage output.
The Transmitter board is available for all existing Sensoric electrochemical gas sensors.
The Transmitter Board has on-board temperature compensation and allows the use of an
optional external temperature sensor for temperature compensation.
In general, it is shipped fully calibrated including the sensor cell. There are two possibilities
for recalibration when appropriate:
by use of a small button for zero and/or span calibration andby use of a potentiometer for span calibration.

The Transmitter Board is equipped with 4 mounting holes and an LED for calibration
acknowledgement.

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

4

Operation Manual - Standard Operation
Please attach power supply to the screw-connector/plug, either polarity of the power supply
will do.
This connector also is the 4..20 mA 2-wire interface. It can be used in two orientations:either vertical or horizontal to the board.
Now the Transmitter Board is ready to operate and the sensor signal can be read from the4..20 mA interface and/or from the 40..200 mV voltage output.
Operational status can be retrieved by pressing the button for 0.5 to 3 seconds.
The blinking pattern of the LED shows the status:


1x factory settings (as delivered);
2x individual settings (recalibrated);
3x factory settings after reset.

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

5

Operation Manual - Error conditions
Error signalling:errors are signalled with the output signal going to 21.0 mA
only under the below circumstances

Error conditions the board can recognize are:

the output drops to less than 3.8 mA
the output rises obove 20.5 mA

the board is operated more than 5 K outside temperature specifications of the sensor.

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

Other errors are not automatically signalled.
For additional error recognition and signalling use the process control system.

6Operation Manual - Calibration with buttonZero Reading Calibration:
Before starting the calibration, please allow the signal to stabilize for at least 5 min during exposure
to zero gas.
Once output signal is stable, press the calibration button for 6 to 12 sec.
The LED acknowledges calibration by 6x blinking.
(Please note that warranty on calibration is lost once you perform a recalibration.)
Span Calibration – via calibration button:
The sensor cell is exposed to calibration gas in full-scale concentration. Please allow the signal tostabilize for at least 5 min.
Once output signal is stable, press the calibration button for 12 to 60 sec. The LED acknowledges
calibration by 8x blinking.
Remove gas. (Please note that warranty on calibration is lost once you perform a recalibration.)

For further technical support please contact us.
Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solelyfor consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

Reset:The zero and span parameters of the board can be resetted to the default factory values.
Press the button for 3 to 6 seconds. The LED acknowledges the reset by 4x blinking.

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Operation Manual - Calibration with potentiometer
Span Calibration – via potentiometer:
The sensor cell is exposed to calibration gas in full-scale concentration. Please allow thesignal to stabilize for at least 5 min.
Once output signal is stable, adjust the signal to the appropriate value by changing thepotentiometer setting.
Remove gas.
(Please note that warranty on calibration is lost once you change potentiometer setting.)

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

For further technical support please contact us.

8Technical Details – Transmitter board

Supply voltage :Maximum Loop Load :Protection :No power equivalent :Operating current range :Bias range :Minimal Resolution :Optional Zero Adjust :Recalibration :Temperature Range :Temp. Compensation :Special features :4..20 mA, 2 wire loop powered
40..200 mV
10 to 30 V DC
700 Ohms
Reverse polarity protection
Short circuit via FET, if applicable for sensor cells
0 .. 30 nA to 0 … 500 µA, bipolar operation
0 .. –1500 mV
0.01 mA
Button press (compensates negative or positive offsets)
Button press for full scale adjustment (span gas concentration),
optional manual calibration via potentiometer-40 .. +50 °C (transmitterboard)
For sensor operating conditions please see sensor data sheet.
-40 .. +50 °C via temperature sensor and microprocessor
if applicable by sensor specification.
10 Ohms on board for voltage output (200 mV = 20 mA),
Four mounting holes (3 mm)

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solelyfor consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

Output :9

Important Information Regarding the Use of Sensors
in Safety Critical Applications
The Sensoric transmitter has been designed to ensure a maximum reliability in the fieldat minimum cost.
Therefore, the sensor cell is soldered onto the board and cannot be replaced easily
in the field.
Should the sensor no longer fulfill its function of gas monitoring, Sensoric
recommends replacing the complete low cost transmitter rather than exchanging thesensor in the field.

Reliable calibration of gas sensors and transmitters in field applications requires
extensive training and experience in handling trace levels of calibration gasconcentrations.

Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Sensoric Sensors are designed and manufactured in
Justus-von-Liebig-Str. 22, D- 53121 Bonn, Germany
Tel: ++49 (0) 228 52 66 40 Fax: ++49 (0) 228 5266439

Rev. 06/2012

Designing gas detection solutions around the Sensoric transmitter may require
additional mounting tools for the transmitter. Sensoric offers technical support andcustomized solutions to ensure the correct and most effective integration.

10Safety Note
This sensor is designed to be used in safety critical applications. To ensure that thesensor and/or instrument in which it is used, are operating properly, it is arequirement that the function of the device is confirmed by exposure to target gas(bump check) before each use of the sensor and/or instrument. Failure to carry out
such tests may jeopardize the safety of people and property.
Attention
Use of the Sensoric range sensors requires complete understanding of theinstructions. Before using Sensoric range sensors please carefully read‘Application Notes’ which can be found at www.citytech.com under the heading‘Support’ -> ‘Application Notes’ -> ‘Sensoric’For further assistance on sensor selection and use, please contact a member of
the Technical Sales team.
Sensoric deems the data contained herein as factual, and the opinions expressed are those of qualified experts based on the results of tests conducted.
The above data can not be used as a warranty provision or representation for which SensoriC assumes legal responsibility. The data are offered solely
for consideration, investigation and verification. Any use of this information is subject to federal, state and local laws and regulations.

Rev. 06/2012

Product Safety Data Sheets (PSDS) can be obtained at www.citytech.com under
the heading ‘Support’ -> ‘Product Safety Datasheets’

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