Dräger MQG 0020, Instructions For Use Manual

Page: 21 / 288

Dräger X-am 5100 21
Use
3.3 Performing the bump test
1. Prepare a test gas source (e.g., cylinder, permeation oven);
the volume flow must be 0.5 L/min and the gas concentration must
be higher than the alarm threshold concentration to be tested.
2. Fit the calibration adapter
(68 06 291) to the sensor cap.
3. Connect the test gas source
to the calibration adapter.
4. 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).
5. Switch on the instrument.
6. Open the valve on the test
gas source to let test gas flow
over the sensor.
7. Recommendation: Wait until
the instrument displays the test gas concentration with acceptable
tolerance.

However, wait at least until alarm threshold A1 or A2 has been
exceeded.

If the alarm thresholds are exceeded, the instrument displays the
gas concentration alternately with
» A1 « or » A2 « depending on
the test gas concentration.
8. Close the valve on the test gas source.

If the concentration has now fallen below the A1 alarm threshold:

Acknowledge the alarm.

If gas concentration display is of acceptable tolerance:

Calibrate the instrument, see “Calibrating the instrument” on
page 25.
WARNING
Never inhale the test gas. Danger to health!

Observe the hazard warnings in the relevant Safety Data
Sheets.
NOTICE
Sensor-specific features affecting the bump test are
described in the respective sensor data sheets.
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