24
Technical manual
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X-am
®
2800
Maintenance
b. Enter and confirm the password.
c. Select and confirm fresh air calibration .
All measurement channels involved in the fresh air calibration flash.
3. Press to start fresh air calibration manually.
All measurement channels involved in the fresh air calibration flash.
4. If necessary, press to override the stability check. In this case, a calibration
takes place immediately.
Dräger recommends using the automatic stability control (wait until the gas
detector has independently carried out the calibration).
The new measured value is displayed for control purposes.
The result is displayed as follows:
OK
fresh air calibration successful.
fresh air calibration failed.
5. The fresh air calibration is complete when all participating measurement
channels have passed or failed the fresh air calibration.
● Select to confirm the result.
● Select and then confirm the dialogue to discard the result.
● Select to return to the results.
6.7.3
Carrying out a single-gas calibration
Observe the following instructions for single-gas calibration:
● With a zero-point calibration, the zero-point of the selected sensor is set to zero.
● In the case of the span calibration, the sensitivity of the selected sensor is set to
the concentration value of the test gas used.
● Use a standard test gas.
Permitted test gas concentration:
Dräger recommends selecting a test concentration in the middle of the
respective measuring range or close to the expected measured value.
WARNING
Health hazard from test gas
Breathing in of test gas can be harmful to health or lead to death.
► Do not inhale the test gas.
► Observe risks connected with the test gas, hazards notes and safety advice (see
for example safety data sheets, instructions on the testing media).
1. Connect the test gas cylinder to the calibration adapter (order no. 8318752).
OK
OK
CatEx
O
2
The permitted test gas concentration is
displayed by the gas detector during sin
-
gle-gas calibration of the sensitivity.
The permitted test gas concentration of other gases can be read out of the gas
detector by the Dräger CC Vision PC software. The permitted concentrations
depend on the set parameters (e.g. alarm thresholds).
