OPERATION
MSA
If the "
9
" does not appear and "
ERR
" is displayed, check:
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 (
Æ
Section 3.10).
(7) Repeat the bump-test after the calibration.
Fig. 6 Conducting the bump-test
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