30
Maintenance
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
documented with the result and date in
the device memory.
● Close the test gas cylinder valve and
remove the device from the calibration
cradle.
— If the concentration values have now
fallen under the A1 alarm setpoints, the
device 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 34.
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