To calibrate the sensor:
1. Attach a regulator to the zero gas cylinder (if using) and the calibration cylinder.
2. Attach the plastic sensor guard to the bottom of the sensor housing if not already installed.
3. Place the green calibration cap over the sensor guard inlet so that it is flush with the bottom of the sensor guard and
completely covers the sensor guard inlet.
4. Attach the tubing to the plastic stem protruding through the green calibration cap.
5. Push the other end of the tubing over the zero cylinder regulator. Ensure the tubing completely covers the gas outlet.
6. Press EZ touch until Calibration is displayed, and release.
If a password is enabled, you will need to enter it to access the menu system.
NOTICE
If the calibration cap cannot be used (such as for a remote sensor application), ambient wind conditions must be minimized
during calibration to avoid a calibration with increased sensitivity.
7. Select Sensor#1 or Sensor#2, and then select “Finished?” to start the calibration process.
8. Once the screen displays Zero in Progress, turn on zero gas flow by turning knob on the regulator (if using).
9. Wait while the device displays Zeroing.
10. Once the Zero Calibration is complete, remove the tubing from the sensor guard inlet.
11. The display will show Apply Gas. Attach tubing for calibration gas and turn on the regulator
Display will show “Calibration in Progress”.
“Calibration Complete Remove Gas” will show when span is complete.
If “PASS” displays, the procedure is complete.
If “FAIL” displays, the procedure was unsuccessful. See 6.5 Troubleshooting.
12. Remove the calibration equipment from the device, including the sensor guard and calibration cap.
Sensors with TruCal and have Diffusion Supervision enabled can go into Diffusion Supervision Fault if the green
calibration cap is left on after completing a calibration.
WARNING!
The green calibration cap must be removed from the sensor after calibration. Failure to do so could restrict gas flow to the
sensor and result in erroneously low readings.
Failure to follow this warning can result in serious personal injury or death.
5.7 How to Calibrate an Oxygen XCell Sensor
An oxygen span gas cylinder is not needed if the sensor is in an area that maintains ambient air conditions. Follow the same
process for XCell sensors as described in 5.6 How to Calibrate XCell Sensors. When the display prompts "Apply Span Gas",
simply allow the countdown to occur without applying gas.
If the sensor is located in an area of normally low or enriched oxygen, then a 20.8%oxygen sample must be applied.
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US 5 Calibration
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