O2I-FLEX Oxygen Sensor Interface Electronics

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The O2I-Flex Oxygen Sensor Interface Electronics provides the electronics necessary to power and control SST’s range of zirconium dioxide oxygen sensors.

The O2I-Flex oxygen sensor interface electronics can be user configured to output measuring ranges of 0-25% O₂ and 0-100% O₂. The entire measurement range is linear in both cases and offers three output options 0-10V, 4-20mA and RS232 comms interface.

The O2I-Flex can be calibrated in fresh air (20.7% O₂) or in any other known O₂ concentration by either an automatic or manual external trigger or via an on-board push button switch. The electronics offer power and sensor operating LEDs and removable polarised screw terminals for easy wiring.

The adaptive software filtering provides a fast sensor response coupled with a stable oxygen output.

TECHNICAL SPECIFICATIONS
Supply voltage 24VDC ± 10%
Supply current 600mA max. at 24VDC
Digital output RS232
Analogue output 4—20mA; load 100—600Ω
0—10VDC; load 10kΩ min
Temperature limits
Storage -10 to 70⁰C
Operating -10°C to +70°C
Oxygen pressure limits 1—1000mbar

OUTPUT VALUES
Oxygen range (analogue output) 0.12—25% O2
0.12—100% O2
Oxygen range (RS232 output) 0.12—100% O2
Accuracy after calibration 1% O2
Repeatability after calibration 0.5% O2
Output resolution:
0—10VDC: 0.01V
4—20mA: 0.01mA
RS232: 0.01% O2
Response time (step 10—90%)
Fast response sensor connected: < 4s
Standard response sensor connected: < 15s
Initial warm up time (till stable output) 5—10mins
Output inactive start up delay (heater warm up) 6

The O2I-Flex Oxygen Sensor Interface Electronics provides the electronics necessary to power and control SST’s range of zirconium dioxide oxygen sensors.

The O2I-Flex oxygen sensor interface electronics can be user configured to output measuring ranges of 0-25% O₂ and 0-100% O₂. The entire measurement range is linear in both cases and offers three output options 0-10V, 4-20mA and RS232 comms interface.

The O2I-Flex can be calibrated in fresh air (20.7% O₂) or in any other known O₂ concentration by either an automatic or manual external trigger or via an on-board push button switch. The electronics offer power and sensor operating LEDs and removable polarised screw terminals for easy wiring.

The adaptive software filtering provides a fast sensor response coupled with a stable oxygen output.

TECHNICAL SPECIFICATIONS
Supply voltage 24VDC ± 10%
Supply current 600mA max. at 24VDC
Digital output RS232
Analogue output 4—20mA; load 100—600Ω
0—10VDC; load 10kΩ min
Temperature limits
Storage -10 to 70⁰C
Operating -10°C to +70°C
Oxygen pressure limits 1—1000mbar

OUTPUT VALUES
Oxygen range (analogue output) 0.12—25% O2
0.12—100% O2
Oxygen range (RS232 output) 0.12—100% O2
Accuracy after calibration 1% O2
Repeatability after calibration 0.5% O2
Output resolution:
0—10VDC: 0.01V
4—20mA: 0.01mA
RS232: 0.01% O2
Response time (step 10—90%)
Fast response sensor connected: < 4s
Standard response sensor connected: < 15s
Initial warm up time (till stable output) 5—10mins
Output inactive start up delay (heater warm up) 6

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