PM400 Multi-Gas Personal Monitor
REV – 2.0
[34-2900-0206-2 ]
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P a g e
To perform a Fresh Air Calibration:
1.
From the Main screen, press the [Function] to cycle to the Calibration screen. The calibration icon and the
Calibration gas settings are displayed. Typical readings clockwise from the upper left are 50, 18.0, 25, and
100.
2.
Press and hold the [Function] key for five seconds to enter the Calibration menu. The first item in the
submenu is Fresh Air (Zero) calibration; CAL ZERO displays.
3.
Press and hold the [Function] key for five seconds to begin calibrating. A ten-second countdown displays in
the lower-right corner of the display while the device cycles through displaying detected gas levels.
4.
Upon a successful calibration, your device displays the Calibration Success screen (OK displays in each corner
of the screen) for five seconds, then returns to the Calibration submenu. Press the [Function] key to cycle
through the Calibration menu or wait ten seconds for the device to return to the Main screen.
5.
If calibration fails, the gas(es)/sensor(s) that failed are displayed. This failed calibration message continues to
flash on the display until a successful calibration is performed.
If calibration continues to fail, discontinue use and contact AimSafety Technical Support at
or 844-325-3050.
