Skip to content

Calibrate a Wireless Oxygen Gas Sensor

Improve the accuracy of a Wireless Oxygen Gas Sensor (PS-3217) by calibrating its measurement.

The Wireless Oxygen Gas Sensor should be calibrated on its first use. The sensor should also be calibrated if, at any point, its reading of the oxygen concentration in an atmospheric sample is ever more than ±1% away from 20.9%.

Obtaining a sample

Calibrating the Wireless Oxygen Gas Sensor requires a 250 mL Sample Bottle (SE-6938) or equivalent. This bottle will be used to collect a sample of atmospheric gas, which will provide you with your calibration value. This sample should be collected outdoors to ensure it contains fresh, uncontaminated air. To do so:

  1. In an outdoor environment, hold the sample bottle upright and open to the air.
  2. Insert the stopper of the sensor into the bottle to seal the bottle and create an atmospheric sample.

Calibration

  1. Connect the sensor to Chemvue.
  2. From any page, select one of the Displayed Measurement buttons and select O2 Concentration from the list of measurements.

  3. Select the same Displayed Measurement button again and select Calibrate.

    Calibrate Sensor option

  4. Select One Standard (1 point slope) from the dropdown list, then select Next.

    One Standard (1 point slope)

  5. The sample should contain a known concentration of 20.9% oxygen. Enter 20.9 into the Standard Value box, then select Set Current Value to Standard Value.

    Note

    Ignore the unit on the Sensor Value measurement. This is the raw sensor output number, which is proportional to the oxygen present at the sensor, and is not an actual percentage.

    Setting the Standard Value

  6. Review your new calibration, then select Apply.

    Review calibration