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Maintenance
The Dräger CC-Vision PC software can be used to
configure whether a quick or advanced bump test should be
performed with the menu or in the bump test station.
Dräger recommends using the extended bump test for cross
calibrations (see the Dräger X-dock instructions for use).
For the CatEx sensor, we recommend methane as the test
gas, including for cross calibration, if methane is expected in
the target application.
X-am 5800: With a manual bump test, consideration must
be given to the influence of the H
An active H
added signal will be automatically temporarily
2
deactivated for the duration of a manual calibration, a PC
calibration or an automatic bump test.
The bump test can also be carried out in the password-
protected menu.
Prerequisites
– 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 (does not apply to bump test with X-
dock).
– The gas detector is switched on and warm-up phase 1 is
complete.
– A suitable test gas cylinder is available, e.g. test gas
cylinder (order number 68 11 130) with the following mixed
gas ratios: 50 ppm CO, 15 ppm H
18 Vol% O
(other test gas cylinders can be added on
2
request)
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).
Dräger recommends a test gas concentration of <60 %LEL
for CatEx sensors and a measuring range of 0 % to
100 %LEL.
1. Connect the test gas cylinder to the calibration adapter
(order no. 8318752).
2. Insert the switched-on gas detector into the calibration
adapter and press it down until it locks into place.
3. Call the bump test via the Quick menu. Failure to do so
means that the bump test is performed without
documentation.
4. Open the test gas cylinder valve, the volume flow must be
0.5 L/min and the gas concentration must be higher (lower
with O
) than the alarm threshold concentration that is to
2
be tested.
28
added signal.
2
S, 2.5 Vol% % CH4,
2
5. Wait until the detector displays the test gas concentration
with sufficient tolerance. (The evaluation is carried out
during the advanced bump test by the gas detector.)
Ex: ±20 % of the test gas concentration
IR Ex: ±20 % of the test gas concentration (X-am 5800
only)
IR CO
: ±20 % of the test gas concentration (X-
2
am 5800 only)
O
: ±0.6 Vol%
2
TOX: ±20 % of the test gas concentration
6. Close the test gas cylinder valve and remove the gas
detector from the calibration adapter.
7. If the concentrations have fallen below the A1 alarm
thresholds, the gas detector automatically switches back
to measuring mode after 30 s at the latest.
Further steps
If the displays are outside of the above-mentioned ranges,
have the gas detector calibrated by service personnel.
5.5
Check response time (t90)
The test can also take place in calibration mode in which
case the values are not displaced by alarms. If necessary, the
values can subsequently be discarded, if the gas detector
already has a valid calibration.
1. Carry out a bump test and conduct a simplified check of
the response time.
a. Connect the test gas cylinder to the calibration adapter
and open the valve on the test gas cylinder so that the
calibration adapter is purged with test gas.
b. Insert the switched-on gas detector into the calibration
adapter and press it down until it locks into place.
Record the starting time.
c. Determine the time until 90 % of the test gas
concentration is reached.
2. Compare the measured response time with the previous
bump tests and with the t90 values indicated in the
supplementary documentation (part number 9033890)
provided.
The determined t90 setting time may differ from the
certified setting time, as this simplified procedure does not
conform to the standard.
The X-dock maintenance station provides the option of
automatically checking the response time.
5.6
Calibrating the gas detector
5.6.1 Notes on calibration
WARNING
Incorrect measured values
Incorrect calibration means that alarms may not be triggered
or only with a delay.
► Always carry out the clean air/zero calibration prior to the
span calibration.
Instructions for use
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X-am
®
®
2600 / X-am
2800 / X-am
®
5800
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