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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. Avoid
putting the pump adapter at the wrong angle.
Alternatively the pump adapter can be used with an on-
demand valve.
2. Connect the hose to the test gas cylinder and the inlet on
the calibration adapter.
3. If needed, connect a second hose (max. length: 2 m) to
the outlet on the calibration adapter to direct the test gas
to an exhaust or outside. Make sure that these is sufficient
ventilation in room or vehicles.
4. Open the bump test (depending on the configuration).
a. Select
> Maintenance > Bump test (if configured
using the Dräger CC-Vision PC software).
b.
> Login
Enter and confirm the password.
Select Maintenance > Bump test.
5. Open the valve on the test gas cylinder, the volume flow
must be 0.5 L/min and the gas concentration must be
higher (lower with oxygen) than the alarm threshold
concentration that is to be tested.
6. Select
to start the bump test.
All measuring channels which are included in the
bump test flash, and all others are greyed out. When a
measuring channel successfully passes the test,
appears.
7. The bump test is complete when all measuring channels
included in the test successfully passed or failed the test.
8. Close the valves on the test gas cylinder.
● Select
and then confirm the dialog to discard the
result.
●
Select
to confirm the result.
9. Remove the calibration adapter.
10. After completing the measurement, make sure that the
seal on the calibration adapter is clean and that there are
no chips of metal on the seal.
Instructions for use
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X-am
®
3500
Plug the protective cap onto the calibration adapter to
protect the seal from damage and being deformed.
If there was an error during the bump test:
1. An error is displayed for the measuring channel.
2. Repeat the bump test.
3. If necessary, replace the sensor.
5.4.2 Checking response time (t90)
!
1. Carry out a bump test and a simplified check of the
response time.
a. Connect the test gas to the calibration adapter and
open the test gas cylinder valve to flush the calibration
adapter with the test gas.
b. Place the calibration adapter on the gas detector and
determine the start time.
c. Determine the time until up to 90 % of the test gas
concentration has been reached.
2. Compare the measured response time with that of
previous bump tests and with the t90 values indicated in
the enclosed supplementary documentation (part no.
9033655).
The T90 setup time determined may deviate from the
certified setup time, as this simplified process is not standard-
compliant.
5.5
Calibrating the gas detector
WARNING
Incorrect measured values!
An incorrect calibration may prevent alarms from triggering, or
alarms may trigger late.
► Do not close the outlet of the calibration adapter / exhaust
gas hose.
► Always carry out the fresh air / zero calibration before the
span calibration.
NOTICE
Damage to the sensors!
When using the exhaust gas hose, the sensors may be
damaged in the case of direct suction on the exhaust gas
hose.
► If necessary, lead the exhaust gas hose (max. length 2 m)
to an exhaust of outside.
If measurement gas or calibration gas is changed, the
affected channel must be calibrated.
Observe the following notices for the calibration:
● For the fresh air calibration of Dräger IR sensors for
explosive hydrocarbon, it is assumed that the change in
the zero-point leads to a change of less than or equal to
±5 %LEL of the measured value at 50 %LEL. If the
deviation is greater than ±5 %LEL, the span calibration is
invalid.
● For the zero-point calibration of Dräger IR sensors, it is
assumed that the change in the zero-point leads to a
change of less than or equal to ±5 %LEL or 0.05 Vol%
CO
of the measured value at 50 %LEL or 0.5 Vol% CO
2
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