Generic Sensor Board for Oxygen Sensors by SENSORE Electronic - GSB

  • Generic Sensor Board for Oxygen Sensors by SENSORE Electronic
  • Generic Sensor Board for Oxygen Sensors by SENSORE Electronic
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• Microcontroller based interface circuit
• Compatible O2-Sensor-types: SO-zz-xxx, SP-zz-xxx
• Typical current consumption 200mA @ 12Vdc
• Linear sensor output signal according to O2-concentration
• External voltage supply: 12Vdc
• Configurable sensor operation parameters
• Heater temperature control

  • Model Number: GSB
  • Data Sheet: Date Sheet File
Quantity:
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Product Specification

Generic Sensor Board
"GSB" (Generic Sensor Board) is a universal electronic module for all sensor types. It can be used both for controlling the amperometric and potentiometric sensors.

At this module, sensor temperature is precisely controlled to a constant temperature by microcontroller. The linearized output signal is available as a voltage signal (0-5V), current signal (4-20mA) or digital via RS232.

Ele
ctronic sensor interface for oxygen sensors

• Sensor interface board for direct integration in customer application
• Demonstration board for laboratory sensor evaluations

GSB - Generic Sensor Board Main Features
• Microcontroller based interface circuit
• Compatible O2-Sensor-types:
      Standard: SO-zz-xxx (amperometric sensor type)
      On request: SP-zz-xxx (ampero-potentiometric sensor type)
• External voltage supply: 12Vdc (possible range 6-25Vdc)
      typical current consumption 200mA @ 12Vdc
• Sensor calibration
      Single point calibration at specified O2-concentration
      heater resistance calibration to ensure correct sensor temperature
      Calibration values are stored in nonvolatile memory
      possibility to purchase a factory calibrated set (GSB+sensor)
• Linear sensor output signal according to O2-concentration:
      analog 0-5V (Vout)
      analog 4-20mA (Iout)
      digital via RS232
• Configurable sensor operation parameters
      6 preinstalled settings for different sensor types
      optional: customized parameters, e.g. :
             ▪ heatup time and heater operation mode
             ▪ sensor voltage
             ▪ Measurement range and corresponding output signals
• Heater temperature control:
      4-wire heater resistance measurement
      constant heater resistance control for temperature compensation
      optional: constant heater voltage or constant power control
• Sensor connection:
      connection via 6pol RAST 2.5
      connection via screw terminal
      optional: directly soldered on GSB-PCB

GSB - Generic Sensor Board Advanced options on request
• Configurable digital I/Os, e.g.:
      Open collector outputs to switch external loads
              ▪ based on programmable O2-concentration thresholds
              ▪ programmable switching hysteresis
      customized sensor status indication, e.g. error indicator
•  Configuration via RS232
      flexible configuration of sensor operation parameters
      configuration interface for Windows-OS
• Customized GSBs
      to implement customer specific digital or analog interfaces
      customer specific terminals as replacement for screwed terminals
      cost optimization for higher volumes
• Customized firmware

GSB - Generic Sensor Board Basic Specification
Absolute maximum ratings
Values beyond these limits might cause permanent damage

Symbol Parameter min. max Unit
Vcc External power supply voltage 6 25 V
Top GSB operating temperature range 0 50 °C
RIout Load on Iout 0 270 Ω
IVout load current on Vout 0 1 mA
Ioc Open collector sink current (each) 0 50 mA
Voc Open collector voltage 5 30 V
VinR232 Input voltage range R232 -25 25 V
* Only tested at 25 °C with soldered sensor.

Recommended operating conditions
For optimal measurement performance the GSB should be operated at recommended conditions
Symbol Parameter min. max Unit
Vcc External power supply voltage 11 12 V
Top GSB operating temperature range 15 25 °C
RIout Load on Iout 0
Ω
IVout load current on Vout 0
mA
Iocsum Open collector sink current (sum) 1
mA
Remarks:
    ▪ Top refers only to the GSB ambient temperatures, an external connected sensor is not affected by this limitation
    ▪ Iout refers to the 4-20mA analog output and Vout refers to the 0-5V analog output
    ▪ Ioc and Voc are only of relevance, if the open collector outputs are used

Analog output levels
Symbol Output level Condition min. typ. max Unit
Vout Full scale recommended conditions, calibrated at full scale 4.975 5 5.025 V

Zero point 0 0.01 0.025 V
Iout Full scale 19.95 20 20.05 mA

Zero point 3.95 4 4.05 mA

Preinstalled sensor settings for SO-zz-xxx
The basic GSB configuration contains the following preinstalled sensor settings, to be selected via DIP switch. SP-zz-xxx configurations on request


DIP Switch Bit sensor 
description
GSB full scale O2 calibration 
concentration
sensor
voltage
heater
control
       sensor type 1 2 3
0 reserved ON ON ON - - - -
1 SO-zz-001 OFF ON ON ppm 1000 vol.-ppm O2 1000 vol.-ppm O2 0,70 Volt Rconst
2 SO-zz-010 ON OFF ON 1% 1 vol.-% O2 1 vol.-% O2 0,75 Volt Rconst
3 SO-zz-020 OFF OFF ON 2% 2 vol.-% O2 2 vol.-% O2 0,75 Volt Rconst
4 SO-zz-050 ON ON OFF 5% 5 vol.-% O2 5 vol.-% O2 0,80 Volt Rconst
5 SO-zz-250 OFF ON OFF 25% 25 vol.-% O2 209 vol.-% O2 0,85 Volt Rconst
6 SO-zz-960 ON OFF OFF 96% 100 vol.-% O2 209 vol.-% O2 1,60 Volt Rconst
7 reserved OFF OFF OFF - - - -
* The specified sensor full scale concentration is 96%

Measurement accuracy – sensor characteristic
If operated at recommended conditions the measurement accuracy will be primarily limited by the sensor accuracy. Also the dynamic sensor characteristic will not be significantly changed by the GSB. See Sensor data sheet for more details.

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