MSA PrimaX IR Manuel D'utilisation page 24

Start-up and Calibration
Calibration Cap Procedure
(1) Remove the environmental guard from the device.
(2) The calibration cap is equipped with a slot for an optional tether retention sys-
tem. The figure below shows the location of the tether slot.
Fig. 11 Calibration cap
1 Tether slot
(3) If the user can confirm that the ambient air is free of combustible gas, ambient
air can be used in place of the zero gas cylinder. See fig. 14 for a visual rep-
resentation of the calibration process.
(4) Install the calibration cap. Press firmly to ensure cap is properly seated.
The calibration process will start automatically when the cap is fully seated

on the sensor housing.
Under normal conditions, the display will show all icons steady at power-up.

(5) The calibration cap display indicates the zero gas cylinder symbol and flashes,
indicating that the device is in Zero Calibration mode.
The initial 30 seconds is intended to give the user time to apply gas to the

sensor. During this time, the user can abort the process by removing the
calibration cap.
After the initial 30 seconds, the device will start the Zero calibration adjust-

ment. The Zero Calibration is indicated by the whi t e cylinder [ fig. 12] and
the word "Zero".
Removal of the calibration cap after the initial 30 seconds will result in a cal-

ibration fault. This will abort the present calibration and the device will con-
tinue to operate with the previous calibration settings.
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PrimaX IR
MSA
US