MSA AUER ALTAIR, Руководство по эксплуатации

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GB
MSA OPERATION
ALTAIR
TM
Operating Manual
21
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:
ƒ any change in the air pressure (including height above sea-level change),
ƒ any extreme changes in the atmospheric temperature,
ƒ if the self-test failed.
For instruments used to monitor toxic gases (CO and H
2
S), calibration must be
carried out in the following cases:
ƒ after major shocks,
ƒ any extreme changes in the atmospheric temperature,
ƒ after use under high gas concentrations,
ƒ 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
ƒ "
TEST
" "
GAS
" "
?
" is displayed.
(2) Press and hold [TEST] key for 3 s.
ƒ "
TEST
" "
CAL
" is displayed.
ƒ After 3 s, "
FAS
" "
?
" is displayed which prompts the user to do a fresh air
equalisation.
(3) During the "
FAS
" "
?
" display, press the [TEST] key to do a fresh air
equalisation.
If no fresh air equalisation is carried out, the instrument returns to
normal operating mode.
ƒ During the equalisation, the hour glass and "
FAS
" are displayed.
ƒ
If the equalisation fails ("
ERR
" display), the instrument returns to normal
operating mode after 5 s.