Technical manual | X-am® 3500/8000 43
Maintenance
Requirements:
– Fresh air calibration can only be carried out if at least one sensor supports the
fresh air calibration.
– The fresh air must be free of measurement or interfering gasses.
– The gas detector is switched on and warm-up phases 1 and 2 are complete.
To carry out a fresh air calibration:
1. Switch on the gas detector.
2. Open the fresh air calibration (depending on the configuration):
If the fresh air calibration was released for user level 0 by the Dräger CC-Vision
PC software:
● Select > Maintenance > Fresh air cal..
If the fresh air calibration was not released for user level 0 by the Dräger CC-
Vision PC software:
a. > Login
b. Enter and confirm the password.
c. Select Maintenance > Fresh air cal..
3. Select to start the fresh air calibration.
All measuring channels which are included in the fresh air calibration flash,
and all others are greyed out.
The result is displayed as follows for every measuring channel:
fresh air calibration successful.
fresh air calibration failed.
4. If necessary, press to overrule the stability control. In this case, a calibration
happens immediately.
Dräger recommends using the automatic stability control (wait until the gas
detector has automatically carried out the calibration).
The new measured value is displayed for confirmation.
The result is displayed as follows:
fresh air calibration successful.
fresh air calibration failed.
5. The fresh air calibration is complete when all measuring channels included in
the calibration have successfully passed or failed the calibration.
► Select and then confirm the dialog to discard the result.
► Select to confirm the result.
If there was an error during the fresh air calibration:
– Repeat the fresh air calibration.
– If necessary, replace the sensor.
6.4.2 Carrying out a single-gas calibration
For a single-gas calibration, you can choose either the zero-point calibration and
span calibration.
With a zero-point calibration, the zero-point of the selected sensor is set to zero.
With a span calibration, the sensitivity of the selected sensor is set to the defined
value of the test gas used.
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