Carrying Out Manual Bump Test - Dräger X-am 2500 Instrucciones De Uso

4.9.3

Carrying out manual bump test

NOTICE
i i
The automatic bump test with the Bump Test Station is
described in the Technical Handbook.
1. Prepare a test gas cylinder, the volume flow must be 0.5 l/min and
the gas concentration must be higher than the alarm threshold
concentration that is to be tested.
2. Connect the test gas cylinder with the calibration cradle (order
no. 83 18 752).
CAUTION
!
Never inhale the test gas. Health hazard!
Observe the hazard warnings of the relevant safety data sheets.
3. Switch on the instrument and insert it into the calibration cradle –
press downwards until it engages.
4. Open the test gas cylinder valve to let test gas flow over the sensors.
5. Wait until the instrument displays the test gas concentration with
sufficient tolerance –
Ex: ±20 % of the test gas concentration
1
O : ±0.6 vol. %
2
TOX: ±20 % of the test gas concentration
If the alarm thresholds are exceeded, the instrument displays the
gas concentration in alternation with A1 or A2 depending on the
test gas concentration.
6. Close the test gas cylinder valve and remove the instrument from
the calibration cradle.
If the displays are outside of the above-mentioned ranges:
Have the instrument calibrated by the service personnel.

1) Upon application of the Dräger mixed gas (order no. 68 11 130) the displays should be
within this range.
Dräger X-am 2500
1
1
4.9.4 Calibration
Calibration may not be possible due to instrument and channel errors.
Carrying out the fresh air calibration
Calibrate the instrument to fresh air, free of measured gases or other
interfering gases. During the fresh air calibration the zero point of all
sensors (with the exception of the DrägerSensor XXS O
In the case of the DrägerSensor XXS O
1. Switch on instrument.
2. Press the [+]-key 3 times, the symbol for fresh air calibration
appears.
3. Press the OK-key to start the fresh air calibration function.
The measured values flash.

When the measured values have stabilized:
a. Press the [OK] key to perform the calibration.
The display containing the current gas concentration changes
with the display OK.
b. Press the OK-key to exit the calibration function or wait for
approx. 5 seconds.
If a fault has occurred during the fresh air calibration:
a. The fault message
respective sensor instead of the measured value.
b. In this case, repeat the fresh air calibration. If necessary,
have the sensor replaced by qualified personnel.
Calibrating/adjusting the sensitivity for an individual
measuring channel
The span calibration/adjustment can be carried out selectively for

individual sensors.
In the case of the span calibration/adjustment, the sensitivity of the

selected sensor is set to the value of the test gas used.
Use a standard test gas.

Operation
) are set to 0.
2
, the display is set to 20.9 vol. %.
2
appears and is displayed for the
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