31
Maintenance
— The current gas concentration values and
the special symbol » « (for bump test)
flash.
● Press the key to start the function test
with gas.
● Open the test gas cylinder valve to let test
gas flow over the sensor.
— If gas concentration exceeds the alarm
thresholds A 1 or A 2 the corresponding
alarm will occur.
Exit the function test with gas:
For the manual bump test:
After the set bump test concentration is
reached:
● Press the key.
— The display containing the current gas
concentration changes with the display
»OK«.
— The bump test that was carried out is do-
cumented with the result and date in the
device memory.
● Close the test gas cylinder valve and re-
move the device from the calibration cr-
adle.
— If the concentration values have now fal-
len under the A1 alarm setpoints, the de-
vice returns to the measuring mode.
— If during the function test no alarm occurs
within 1 minute and the gassing test was
not confirmed by pressing OK, the alarm
mode is activated to indicate failure.
— The fault message » « appears and
» « is displayed instead of the
measured value on the faulty measuring
channel.
● In this case, repeat the function test with
gas or calibrate the device, page 35.
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OK
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