Maintenance; Maintenance Intervals; Calibration Intervals; Test Gases - Dräger X-am 3500 Gebrauchsanweisung

5

Maintenance

5.1

Maintenance intervals

Test
Inspection and maintenance
by specialists.
Check signalling elements
with the signal test
For inspections and maintenance, see:
– EN 60079-29-2 – Guidelines for selection, installation, use
and maintenance of instruments for the detection and
measurement of 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 , H S, H S LC, CO
2 2 2
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.
Different test gases are used depending on the type of
calibration.
5.4

Perform bump test

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 (Dräger X-dock instructions for use).
For bump tests with the wizard and the X-dock, the results are
saved in the device memory.
Instructions for use |
X-am
Interval
Every 12 months
Automatically each time the
device is started or manually
Calibration interval
Every 6 months
®
3500

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.
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 for the pump adapter and calibration
adapter must be clean.
– A suitable test gas cylinder is available, e.g. a test gas
cylinder (order number 68 11 130) with the following mixed
gas ratios: 50 ppm CO, 15 ppm H
18 vol. % O
2
Other test gas cylinder can be added upon request.
To carry out a bump test with the calibration adapter:
1. Mount the calibration adapter to the gas detector. Make
sure that both guide pins are in the correct grooves.
2
|
Maintenance en
S, 2,5 vol. % CH4,
2
35