Dräger MQG 02 0 Series - 6.2 Calibration intervals; 6.3 Test gases; 6.4 Performing the bump test

Technical manual | X-am
®
2800 / X-am
®
5800 23
Maintenance
6.2 Calibration intervals
Observe the relevant specifications in the DrägerSensor
®
& Gas Detectors Manual
and in the instructions for use/data sheets of the Dräger sensors installed.
Recommended calibration intervals for DrägerSensors:
National regulations may stipulate shorter intervals and must be applied.
6.3 Test gases
Test gas properties (e.g. relative humidity, concentration) can be found in the
relevant sensor data sheet.
The relative humidity of the test gas is not relevant for O2 sensors.
Different test gases are used depending on the type of calibration.
6.4 Performing the bump test
The bump test can be performed as follows:
– Manual bump test
– Bump test with the bump test station
– Bump test with X-dock
DrägerSensor
®
Calibration interval
CatEx SR, XXS O
2, XXS H2S LC, XXS
CO LC, XXS SO2, XXS NO2
Every 6 months
1)
1) The recommended calibration interval can be extended to 12 months if it is ensured that an
advanced bump test (tolerance: max. ±20 %) is carried out and passed before use in safety-
relevant measurements. The advanced bump test checks the existing sensitivity.
CatEx SR, measured gas: H2
Every 4 months
1)
PID HC neo
2)
2) If the gas detector is used with the PID HC neo sensor in the X-zone 5500/5800, a bump test
must be carried out after no more than 7 days. This applies in particular if the X-
zone 5500/5800 is continuously powered by the Ex power supply. A bump test must always be
carried out when using the gas detector in the X-zone if the location of the X-zone changes.
Depending on the conditions of use,
daily calibration may be necessary. The
interval may be extended in increments
to up to 30 days
3)
if no deviations occur
during calibration in successive tests.
3) Alternatively, a calibration interval of 6 months may be implemented. This requires the use of
the X-dock maintenance station to conduct a reading test of the type ‘Extended bump test’
every working day with a tolerance of 10 % based on the target concentration. If the gas detec-
tor fails this test, it must be calibrated.
Other DrägerSensors See the special data sheets for the
respective sensors.