Manual Calibration

 

  1. Ensure the Mini-OX is configured for manual calibration. Refer to Setting the Output Type section.

  2. Place the sensor probe in the calibration gas, typically fresh air.

  3. Allow the output tostabilize for at least 5 minutes (10 minutes if powering from cold).

  4. Referring to page 9; Apply GND to the CALIBRATE input (pin 3) for a minimum 5s or until the CYCLE output and green LED blink at a steady 1Hz. Remove GND from pin 3. Manual Calibration is now initialised.

  5. Adjust the MANUAL CAL POT until the output equals the correct value of the calibration gas concentration (see page 18).

  6. Re-apply GND to pin 3 for a minimum 5s. During the 5s the CYCLE output/LED will blink rapidly, go high/on, go low/off then return to cycling normally to indicate normal operation has resumed. At this point remove GND from pin 3.

    NOTE:The output will now track to the correct value for the calibration gasc.

  7. Calibration is complete.

 

NOTE: New calibration values are stored in memory and retained on power loss.