GasAlertMicro 5/PID/IR
User Manual
48
Start Calibration
Note
Verify that the calibration gas being used matches the span
concentration value(s) that are set for the detector. Refer to
Span Gas Value
. Correction factors are not applied during cali-
bration. Correction factors that were set prior to calibration are
restored when the detector returns to normal operation.
a
Caution
Calibrate only in a safe area that is free of hazardous gas
in an atmosphere of 20.9% oxygen.
1. To enter calibration, press and hold
C
and
H
simultane-
ously as the detector beeps, flashes, and vibrates to the
corresponding countdown.
Auto Zero and Oxygen (O
2
) Sensor Calibration
2.
flashes while the detector automatically zeroes the
toxic and combustible sensors, and calibrates the O
2
sensor.
Depending upon the detector being calibrated, the auto zero
screens display differently.
Note
Do not apply calibration gas during this process, otherwise the
auto zero step will fail.
Zero CO
2
(GasAlertMicro 5 IR only)
If calibrating using the GasAlertMicro 5 or the GasAlertMicro PID, pro-
ceed to
Auto Span
step #5. If the detector is passcode protected, pro-
ceed to
Passcode Protect
step #4.
3. For GasAlertMicro 5 IR models, there is a second auto zero
that is performed for the CO
2
sensor.
When auto zero for the other sensors is complete, the following
screen displays.
GasAlertMicro 5/PID
GasAlertMicro 5 IR
Summary of Contents for GasAlertMicro 5IR
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