MSA PrimaX IR Manuel D'utilisation page 25

MSA
(6) Apply zero gas to the calibration port at an approximate flow rate of 1.5 LPM
while the cylinder symbol is flashing. Zero gas can be supplied as ambient air
or from the zero gas cylinder in the calibration kit as noted in chapter 4.3.
Fig. 12 Zero Gas Cylinder Symbol
(7) When the Zero calibration is successful, the checkmark symbol "" will
appear. If only performing a Zero calibration, remove the calibration cap.
Following a successful zero, the span process will automatically begin within
30 seconds following the zero "".
(8) If the Zero calibration fails, the display will show an X for approximately
2 minutes, and will then power down.
If the Zero calibration fails, remove the calibration cap and reinstall to start

another zero attempt. If multiple failures occur, contact an authorized
MSA service center.
(9) When the display flashes the span gas symbol, apply the span gas through the
calibration cap port [ figure 11].
The unit must see gas within 30 seconds after the span symbol starts to

flash or a calibration fault may occur. The initial 30 seconds are intended to
give the user time to apply gas to the sensor. During this time, the user can
abort the Span process by removing the calibration cap.
The display will then flash at a faster rate to indicate active calibration by

the sensor.
Fig. 13 Span Gas Cylinder Symbol
(10) When the Span calibration is successful, the checkmark symbol "" will ap-
pear. If the Span calibration fails, an X will be displayed for approximately
2 minutes, and the device will then power down.
See chapter 5 for subsequent action upon calibration failure.

(11) When calibration is complete, stop the gas flow and remove the calibration
cap. Reconnect the environmental guard or flow cap to the sensor. The cali-
bration cap will automatically power down once removed from the sensor. The
US
PrimaX IR
Start-up and Calibration
25