38
Maintenance
● Open the test gas cylinder valve to let test
gas flow over the sensor.
— The currently displayed measured values
start to flash.
The flashing stops after a static measured
value has been reached.
— The calibration is now carried out
automatically.
— The displayed measured values change
to the values according to the gas
supplied.
When the calibration is completed and
the displayed measured values are stable:
— The display containing the current gas
concentration changes with the display
» OK «.
● Press the key to confirm the
calibration.
— The device changes to the measuring
mode
● Close the test gas cylinder valve and
remove the device from the calibration
cradle.
If a fault has occurred during the 1-button
calibration.
— The fault message » « appears and
» « is displayed for the respective
sensor instead of the measured value
● In this case, repeat the 1-button
calibration or carry out a single gas
calibration (Span cal), refer to page 39.
● If necessary, replace the sensor,
page 45.
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