MSA AUER ALTAIR, Руководство по эксплуатации

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GB
MSA OPERATION
ALTAIR
TM
Operating Manual
25
Calibration – Oxygen
Attention!
The instrument must be calibrated if, during operation, a value different
from 20.8% oxygen in the ambient air is displayed.
In the event of extreme changes in the air pressure or the atmospheric
temperature, false alarms can be created.
Therefore, calibrate the instrument under the conditions of use. The
calibration must be carried out in clean, non-contaminated ambient air.
Carry out the calibration as follows:
(1) Press [TEST] key
ƒ The current oxygen concentration is displayed.
ƒ The display switches to "
TEST
" "
GAS
" "
?
".
(2) During the "
TEST
" "
GAS
" "
?
" display, press and hold the [TEST] key.
ƒ "
GAS
" "
CAL
“ is displayed.
ƒ After 3 s, "
FAS
" "
?
" is displayed which prompts the user to do a fresh air
equalisation.
(3) During the "
FAS
" "
?
" display, press the [TEST] key to do a fresh air
equalisation.
The fresh air equalisation must be carried out in clean, non-
contaminated ambient air.
During the process, do not breathe on the sensor.
If no fresh air equalisation is carried out, the instrument returns to
normal operating mode.
ƒ During the equalisation, the hour glass and "
FAS
" are displayed.
ƒ If the equalisation is successful, "
OK
" is displayed
ƒ If equalisation
fails
, "
ERR
" is displayed and the instrument returns to
normal operating mode after 5 s.
The current values were not changed.
(4) If calibration fails, check:
ƒ that the equalisation was carried out in clean ambient air,
ƒ that during the equalisation, you did not breath on the sensor.
(5) If necessary, repeat the steps (1) to (4).
ƒ "OK" is displayed. Otherwise ("
ERR
"), the instrument must be taken out
of use.
(6) Conduct sel f-test to confirm the calibration.
ƒ If the self-test is successful, a "
9
" is displayed.