MSA ALTAIR PRO Manuel D'utilisation page 30

OPERATION
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If the " " does not appear and "
! whether the sensor is dirty,
! whether the correct test gas was used,
whether the test gas cylinder is empty or the date has expired,
!
! whether the test gas was fed in at the right moment,
! whether the test gas hose was connected to the sensor.
(5) Repeat the bump-test if necessary.
(6) If the self-bump-fails, calibrate the instrument (" Section 3.10).
(7) Repeat the bump-test after the calibration.
Fig. 6 Conducting the bump-test
30
ERR
" is displayed, check:
ALTAIR PRO - Operating Manual
MSA
GB