The calibration of the SDA O2 is a simple, straight-forward procedure, the steps are as follows:

  1. Apply power to the SDA
  2. The intended application will determine the zero and span gas values required. Refer to the SDA User Manual for guidance.
  3. Ensure the SDA is in normal operation mode prior to starting calibration.
  4. Expose the sensor to an appropriate zero gas.
  5. Mute the alarm as necessary (pressing the red 'Mute' button).
  6. Allow the sensor to settle for a period of time so the readings stabilise.
  7. Update the low calibration gas value to reflect the zero gas used.
  8. Press the calibration toggle downwards and rotate the adjustment knob until the O2 content is correct to the zero gas
  9. To abort the procedure, press the red 'Mute' button or simply release the calibration toggle.
  10. To carry out the low calibration adjustment, press the black 'Set' button.
  11. The 'Calibration OK' and green tick icon will indicate a successful calibration.
  12. Press the red 'Mute' button to clear this message.
  13. The display will return to normal operation mode.
  14. Apply a span gas to the SDA sensor.
  15. Allow the sensor to settle for a period of time so the readings can stabilise.
  16. Update the high calibration gas value to reflect the span gas used.
  17. Lift the calibration toggle switch upwards and rotate the adjustment knob until the O2 content is correct to the span gas.
  18. To abort the procedure, press the red 'Mute' button or simply release the calibration toggle.
  19. To carry out the low calibration adjustment, press the black 'Set' button.
  20. The 'Calibration OK' and green tick icon will indicate a successful calibration.
  21. Press the red 'Mute' button to clear this message.
  22. The display will return to normal operation mode.
  23. Congratulations on successfully completing a full calibration adjustment of your SDA device.


The video below demonstrates the Calibration Adjustment Procedure