Dräger MQG 0020, Instructions For Use Manual

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26 Dräger X-am 5100
Maintenance
6. Enter the password (password when delivered = 001).
7. Using the
key, select the standard sensitivity calibration
function » «.

The symbol for standard sensitivity calibration flashes.
8. Press the key to start the sensitivity calibration.

The name of the gas flashes.
9. Confirm with the key.

The calibration gas concentration is displayed
10. Press the key to confirm the calibration gas concentration or
use the key to change the calibration gas concentration and
complete the process by pressing the key.

The set calibration gas concentration flashes.
11. Press the key to confirm the set value.
12. Open the valve on the test gas source 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 displayed measured values change to the values
according to the gas supplied.
When the calibration is complete and the displayed measured
values have stabilized:

The display of the current gas concentration alternates with the
» OK « display.
13. Press the key or wait for 5 seconds to quit the calibration.

The instrument changes to the measuring mode
14. Close the valve on the test gas source.
If a fault has occurred during the sensitivity calibration:

The fault message » « appears and » « is displayed for the
respective sensor instead of the measured value.

Repeat the sensitivity calibration.

If necessary replace the sensor; see the Technical Handbook.
6 Maintenance
6.1 Maintenance intervals
The instrument should be inspected and maintained by suitably
qualified persons annually (consult: EN 60079-29-2 – Guide for the
selection, installation, use and maintenance of apparatus for the
detection and measurement of combustible gases or oxygen;
EN 45544-4 – Electrical apparatus used for the direct detection and
direct concentration measurement of toxic gases and vapours - Part 4:
Guide for selection, installation, use and maintenance and national
regulations).
Calibration intervals: see Instructions for Use for the respective
DrägerSensors.
6.2 Cleaning

The instrument does not need any special care.

If the instrument is very dirty, clean it with a cloth.
OK
OK
OK
OK
OK
OK
CAUTION
Abrasive cleaning implements (brushes etc.), cleaning agents
and cleaning solvents can destroy the dust and water filters.
!