Product Manual

Table Of Contents
47
GasAlertMaxXT II
Calibration
After the span is complete, the following calibration due date screens
display before returning to normal operation.
The number of days that displays in the CAL DUE XXX DAYS screen is
the earliest date (overall of all sensors) a calibration must be performed.
Example: The H
2
S sensor has the earliest date. The H
2
S sensor must
be calibrated in 65 days.
If a sensor fails to span successfully and it is past the calibration due
date, the following screens display.
The example above shows the CO sensor is 6 days past due.
8. Press C to acknowledge the warning before returning to
normal operation. Refer to Troubleshooting
and calibrate
the failed sensor again.
Verification
1. After calibration is complete and the detector returns
to normal operation, verify the calibration using a gas
cylinder other than the one used for calibration.
2. The gas concentration should not exceed the sensor's
detection range. Confirm that the LCD shows the
expected concentration values.