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Maintenance
4. To adopt the new setting, turn the gas detector off and
back on.
Dräger recommends that you activate the capture ranges
feature.
5
Maintenance
CAUTION
Danger to health
Electrochemical sensors contain corrosive liquids.
► In the event of leaking, avoid contact with the skin and
eyes. In case of contact, rinse thoroughly with plenty of
water.
For further information about how to use the Dräger sensor,
click on the following link:
www.draeger.com/sensorhandbook.
5.1
Maintenance intervals
Test
Inspection and maintenance
by specialists.
Check signalling elements
with the signal test
For inspections and maintenance, see:
– EN/IEC 60079-29-2 – Gas detectors - Selection,
installation, use and maintenance of detectors for
flammable gases and 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
– National regulations
5.2
Calibration intervals
Observe the relevant specifications in the Sensor Handbook
or in the instructions for use/data sheets of the DrägerSensors
installed.
Recommended calibration intervals for DrägerSensors:
DrägerSensor
CatEx, O
, O
PR, H
S, H
2
2
2
LC, CO LC, SO
, NO
2
2
Replacing, retrofitting or removing sensors, see technical
manual.
5.3
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 O
sensors.
36
Interval
Every 12 months
Automatically each time the
device is started or manually
Calibration interval
S
Every 6 months
2
Different test gases are used depending on the type of
calibration.
5.4
Carrying out bump tests
The bump test can be performed as follows:
– Bump test with the wizard (quick bump test)
– Bump test with X-dock (quick or extended bump test)
Dräger recommends using the extended bump test for
cross calibrations (see the Dräger X-dock instructions for
use).
For bump tests with the wizard and the X-dock, the results are
saved in the device memory.
5.4.1 Carrying out bump tests with the wizard
WARNING
Health hazard from test gas
Breathing in of test gas can be harmful to health or lead to
death.
► Do not inhale the test gas.
► Observe risks connected with the test gas, hazards notes
and safety advice (see for example safety data sheets,
instructions on the testing media).
WARNING
Incorrect alarm behaviour!
A closed gas path causes incorrect measured values. This
may cause alarms to be triggered incorrectly.
► Never close the outlet of the calibration adapter.
Dräger recommends a test gas concentration of <60 %LEL
for CatEx sensors and a measuring range of 0 % to
100 %LEL.
Dräger recommends selecting a test gas concentration in
the middle of the respective measuring range or close to the
expected measured value.
A bump test with the wizard is always carried out with the
measured gas configured on the gas detector.
Requirements:
– A bump test can only be carried out if at least one sensor
has been configured for the bump test with the Dräger CC-
Vision PC software.
– The gas detector is switched on and warm-up phase 1 is
complete.
– The thread port and sealing surfaces of the pump and
calibration adapter need to be clean and undamaged.
– A suitable test gas cylinder is available, e.g. a test gas
cylinder (order no. 68 11 130) with the following mixed gas
ratios: 50 ppm CO, 15 ppm H
O
2
Other test gas cylinder can be added upon request.
2
S, 2.5 Vol% CH4, 18 Vol%
2
Instructions for use
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