Operation
MSA
ALTAIR 4X
GB
39
The
symbol will be displayed in the Measure mode for 24 hours after a successful
Bump Test.
3.9
Calibration
The device can be calibrated either manually using this procedure or automatically
using the GALAXY GX2 Test Stand.
Calibration must be performed using a flow regulator with a flow rate set to
0.25 litres per minute.
If a battery charging cycle is interrupted before it is completed [4 hours for a fully
discharged battery], allow the device’s internal temperature to stabilise for
30 minutes before performing a Calibration.
(5) Press the
ON/OFF
button to start the bump test
then open the valve on the regulator. The hour-
glass will flash and the sensors will respond to
the gas.
(6) Close the valve after bump testing.
After the Bump Test completes, the device momen-
tarily displays “
BUMP PASS
” or “
BUMP ERROR
” along
with the label of any sensor that failed before return-
ing to Measure mode. If the device fails the
Bump Test, perform a calibration as described in
chapter 3.9.
COMB/EX
O2
Under normal circumstances MSA recommends calibration at least
every six months, however, many European countries have their own
guidelines. Please check your national legislation.
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