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Calibration; Start Calibration; Auto Zero; Auto Zero Fail - Honeywell GasAlert Extreme User Manual

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GasAlert Extreme
User Manual

Calibration

Calibration requires several steps, some of which can be bypassed. A
note is added to each option that can be bypassed.

Start Calibration

To quit calibration at any point, press
any saved values and the detector beeps and vibrates four
times before returning to normal operation.
Calibrate O
in clean air only.
2
1. To enter calibration, in a safe area free of hazardous gas, press
C
E
and hold
and
vibrates four times, and the LEDs flash four times.
After the CAL. screen displays, the detector beeps one time and
the auto zero screen displays.

Auto Zero

The auto zero function automatically zeroes the detector.
34
Note
A
. The detector retains
simultaneously as the detector beeps and
2. The LCD flashes
the sensor. When the auto zero is complete the detector beeps
twice.
Do not apply the calibration gas until the LCD displays the
flashing gas cylinder icon; otherwise, the detector auto zero will
fail.

Auto Zero Fail

If the sensor fails auto zero, the following screen displays.
The detector then bypasses the sensor span and automatically proceeds
to the alarm setpoints.
A
1. Press
to exit the alarm setpoint screens and to return to nor-
mal operation.
2. Restart the calibration procedures in a safe area that is free of
hazardous gas. If auto zero fails a second time, deactivate and
then reactivate the detector to test the sensors.
3. If the auto zero is successful and the passcode protection is dis-
abled, the detector automatically proceeds to the auto span func-
tion.
while the detector automatically zeroes
Note

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