Dräger X-am 7000 Technisches Handbuch Seite 58

The Menu » Calibration «
Step 2 – Sensitivity for thermal conduction:
Select » Span cal. « and press the »

- The values for the calibration gas are displayed, for example:
Cal. gas : CH
4
Concentr. : 50
Unit : Vol%
- The calibration gas, concentration and unit can be changed:
If the settings agree with the available calibration gas:
Select » Next « and press the »

- The message » Gas flow on: CH4 with 500 ml/min «
Apply calibration gas (see the details in the section "Maintenance"

page 78) to the sensor.
Select » Next « and press the »

When the displayed measured value has settled:
Select » Adjust « and press the »

- The message » Remove Gas ! « is displayed
Disconnect the flow of calibration gas.

Select » Next « and press the »

The calibration of the CatEx sensor is complete.
The PID sensor can undergo a sensitivity calibration with the selected
measured gas or a cross-calibration with isobutene. In the case of an
isobutene calibration, all gases that are entered in the data base are
also included in the calibration. In the case of a calibration with the
selected measured gas, only the gas in question is calibrated.
Channels calibrated with isobutene are not included in the subsequent
calibration with isobutene.
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If, during the calibration of the PID sensor, a sensitivity is measured
that falls short of the warning setpoint, the device outputs a warning
message. This can be rectified by cleaning the lamp of the PID sensor.
If the sensitivity does not improve although the lamp has been cleaned
repeatedly, it must be replaced (instructions for lamp cleaning
procedure and replacement: see sensor data sheet).
For the IR, EC and PID sensors, calibration of the sensitivity is executed
in a single step. The calibration gas, calibration-gas concentration and
the unit are set in the same manner as for the CAT sensor.
Dräger X-am 7000