How to Calibrate an XIR PLUS Sensor

A full span calibration is not required for the XIR PLUS sensors. Any degradation of the sensor's performance is associated with slight drifts in its zero response. Restoring the sensor's zero is typically sufficient.

The XIR PLUS sensor guard comes attached to the XIR PLUS sensor. The XIR PLUS calibration cap is placed over the sensor guard so that it is completely covered. Line up the cap so that the sensor guard stem protrudes through the calibration cap. Zero or calibration gas tubing is then attached to the sensor guard via the stem.

WARNING! 

The green calibration cap must be removed from the XIR PLUS 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.

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.

 

The XIR PLUS sensor can be calibrated to a variety of other target gases. Calibrating to a different calibration gas will align the sensor's accuracy to that gas. Refer to Appendix: Calibration Guide for Additional Gases for calibration settings. Note that the XIR PLUS sensor is a general hydrocarbon sensor, and calibrating to another gas will not prevent it from seeing other hydrocarbons in the atmosphere.