Calibrating And Adjusting The Instrument; Adjustment With Test Gas - Dräger X-am 7000 Technisches Handbuch

10.2

Calibrating and adjusting the instrument

- Allow the sensor to be calibrated to warm up before starting
calibration! See the sensor data sheet and the display for the
required warming-up times.
- For some sensors (such as oxygen sensors), the function » Zero
point « is actually a test of the sensor. The function does not
execute calibration since the zero point of these sensors does not
need to be calibrated.
- For critical applications:
Define the calibration interval in accordance with EN 60079-29-2
2)
and/or EN 45544-4 and any applicable national regulations.
Note the calibration sequence!
First check the zero point and, if corrected, immediately after this

check the sensitivity and adjust it as necessary.
- Never adjust the sensitivity before calibrating the zero point.
- First calibrate the EC sensors, then the IR sensors and finally the
CA sensor.
For the EC sensors:
Adjust zero point and sensitivity.

For the CatEx sensor 100 Vol.-% only:
- Calibrate the zero-point, then the sensitivity for thermal conduction.
For the CatEx sensor 100 % LEL only:
- Calibrate the zero-point, then the sensitivity for heat of reaction.
1) EN 60079-29-2 – Guidelines for selection, installation, use and
maintenance of instruments for the detection and measurement of
flammable gases and oxygen.
2) EN 45544-4 – Electrical instruments for the direct detection and direct
concentration measurement of toxic gases and vapours – Part 4: Guide for
selection, installation, use and maintenance.
Dräger X-am 7000
- Calibration cannot be carried out if the date and time are not set.
Set date and time, page 60.

- Menu for calibration, page 55 to page 58.
10.2.1

Adjustment with test gas

Use a test-gas cylinder with

pressure-reduction valve
(a stainless-steel valve in the
case of aggressive gases) –
see the information in the
1)
sensor data sheet.
1 Mount the calibration adapter
(with 2 hose sleeves) on the
Dräger X-am 7000 and secure
it with 2 screws. Do not bend
the adapter. Visually check for
leaks.
Vent the test gas into a fume

cupboard or into the open air
(with a hose connected to the
second connector of the
calibration adapter).
Maintenance
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