Zero Cal. for GasAlertMax XT II
Why We need Zero Calibration?
- The sensor of the gas detector will automatically drifting over time, it will faster drift when use unit in much toxic environment.
- Gas sensors can be poisoned when the user use this unit in an over-range concentration.
How to Zero calibration GasAlertMax XT II
- In normal use, press and hold Power button until countdown to 0 and unit Turn OFF. Keep hold Power button to countdown to Calibration function. Unit will be indicated “Auto Zero” within 30s. Then unit required “Apply Gas” for Span calibration. Press Power button to ignore Span calibation. Then, We finish Zero calibration, if have Gas cylinder, We also should be Span calibration in this drift case.
WE STRONG RECOMENT THAT USER SHOULD BE DOING BOTH ZERO AND SPAN CALIBRATION FOR THIS ISSUE!