3.10. Calibrating The Instrument - MSA ALTAIR PRO Manual De Operación

MSA

3.10. Calibrating the Instrument

The ALTAIR PRO must be calibrated if it does not pass a bump-test.
Under normal circumstances MSA recommends calibration at least
every six months, however, many European countries have their own
guidelines. Please check your local legislation.
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 (" Section 5.1),
!
! if the bump-test failed,
! at certain intervals by local procedures.
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 bump-test failed,
! at certain intervals by local procedures.
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 the button.
TEST
! "
(2) Press and hold the button for 3 seconds.
TEST
! "
! After 3 seconds, "
fresh air equalisation.
(3) During the "
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 ?
" "
FAS ?
" " " display, press the button to do a fresh air equalisation.
ERR
ALTAIR PRO - Operating Manual
" is displayed which prompts the user to do a
FAS
" display), the instrument returns to normal
OPERATION
S), calibration must be
2
" are displayed.
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