MSA ALTAIR Manuel D'utilisation page 20

OPERATION
If this display 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 self-test if necessary.
(6) If the self-test fails, calibrate the instrument ( Section 3.6).
(7) Repeat the self-test after the calibration.
(IF PASSED BUMP TEST)
Fig. 6 Conducting the self-test

20
ERR
WAIT (24 h)
(IF 02)
WAIT (3 s)
IF GAS DETECTED
(< 20% THEN 50%)
OF TOXIC CAL VALUE
OR > 20.2% 02
THEN < 19.3% 02
WAIT (5 s)
ALTAIR Operating Manual
" is displayed, check:
PRESS
PRESS
PRESS
NO GAS (90 s)
WAIT 5 s)
MSA
GB