MSA ALTAIR CO Operating Manual page 22

OPERATION
(4) If the equalisation is successful ("
begin the calibration.

CAL
"
(5) During the "
mode.

The value for the test gas in ppm is displayed.
(6) To change the value, press and hold the [TEST] key, until the desired value
is set.

The new value for the test gas in ppm is displayed.

After 3 s, the instrument returns to the calibration mode.
(6) Feed test gas into the instrument (possible test gases  "Test gases" table
in Section 5.2).
Attention!
The concentration of the test gas used must match the stipulated
value in the "Test gases" table in Section 5.2 for the relevant
instrument.
Otherwise, the calibration is not carried out correctly. If there is a fault,
it can lead to serious damage to health or even to death.

The gas value, hour glass and "

If calibration is successful, after approx. 90 s "
instrument returns to normal operating mode after 5 s.

If calibration fails, "
normal operating mode after 5 s.
The current values were not changed.
(7) If calibration fails, check:

whether the correct test gas was used,

whether the test gas cylinder is empty or the date has expired,

whether the test gas hose was connected to the sensor,

whether the flow governor is set to 0.25 l/min.
(8) If necessary, repeat steps (1) to (7).

"OK" is displayed. Otherwise ("
of use.
(9) Conduct a self-test to confirm the calibration.

If the self-test is successful, a "
22
?
" " " is displayed.
CAL ?
" " " display, press the [TEST] key and start the calibration
ERR
ALTAIR Operating Manual
OK
" display), press the [TEST] key and
CAL
" are displayed alternately.
" is displayed and the instrument returns to
ERR
"), the instrument must be taken out

" is displayed.
OK
" is displayed and the
MSA
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