Calibrating The Instrument - MSA ALTAIR Manuel D'utilisation

MSA
3.6.

Calibrating the instrument

Although the instrument is maintenance-free, it must be calibrated if the self-test
has failed. Similarly, certain national regulations may stipulate the calibration of
the instrument.
For instruments used to monitor oxygen calibration must be carried out in the
following cases:
any change in the air pressure (including height above sea-level change),

any extreme changes in the atmospheric temperature,

 if the self-test failed.
For instruments used to monitor toxic gases (CO and H
carried out in the following cases:
 after major shocks,
any extreme changes in the atmospheric temperature,

 after use under high gas concentrations,
if the self-test failed.

Calibration - Toxic gases
Make sure that the calibration is carried out in clean, non-contaminated
ambient air.
Carry out the calibration as follows (also see Fig. 7and Fig. 8):
(1) Press [TEST] key
TEST
 "
(2) Press and hold [TEST] key for 3 s.
TEST
 "
 After 3 s, "
equalisation.
(3) During the "
equalisation.
If no fresh air equalisation is carried out, the instrument returns to
normal operating mode.
 During the equalisation, the hour glass and "
 If the equalisation fails ("
operating mode after 5 s.
GB
GAS ?
" " " " " is displayed.
CAL
" " " is displayed.
FAS ?
" " " is displayed which prompts the user to do a fresh air
FAS ?
" " " display, press the [TEST] key to do a fresh air
ERR
ALTAIR Operating Manual
2
FAS
" display), the instrument returns to normal
OPERATION
S), calibration must be
" are displayed.
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