How often do I need to recalibrate my gas analyzer?

The sensors within your gas analyzer are calibrated with a two-point calibration, with verification at a third point using certified standard gases. These three points include:

1. A set zero or baseline calibration for the sensor;

2. a span or gain calibration of the sensor; and

3. verification with a third standard gas concentration between the baseline and gain points.

The sensor response will naturally drift over time. To make sure you are getting accurate readings it is essential that you keep up with the calibration schedule of the instrument. Set zero or baseline calibration The set zero calibration should be completed once a week. The gas analyzers are supplied with external conditioning chambers and the proper solids to perform this process. No standard gases are required for this, please see your corresponding user manual for more details.

Span or gain calibration

A span calibration should always be preceded by setting the baseline response of the sensor. If performing a span calibration, please review the ‘How do I calibrate the instrument?’ FAQ. Ethylene sensor - should be performed every 3 months. CO2 sensor - should be performed annually. O2 sensor - should be performed biannually.