28
Dräger X-am 2500
Operation
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
2
: ±0.6 vol. %
1
TOX: ±20 %. of the test gas concentration
1
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 adjusted by the service personnel.
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 XXSO
2
) are set to 0.
In the case of the DrägerSensor XXS O
2
, the display is set to 20.9 vol. %.
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 appears and
is displayed for the
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.
1)
During application of the Dräger mixed gas (order no. 68 11 130) the displays should be
within this range.
NOTICE
To check the measured value response times, apply t90 test
gas to the X-am via the calibration cradle. Check the results
in accordance with the information in the table in the enclosed
supplementary documentation (order no. 90 33 890) until
90 % of the end display is reached.
NOTICE
After the bump test (menu), the display shows a printer icon
even if there is no printer connected to the bump test station.
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NOTICE
Dräger recommends using the extended bump test for cross
calibrations (Dräger X-dock technical manual).
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Summary of Contents for X-AM 2500
Page 2: ......
Page 230: ...230 Dr ger X am 2500 1 245 5 Dr ger Dr ger Dr ger Dr ger 1 1 www draeger com ifu i i i i...
Page 237: ...Dr ger X am 2500 237 CatEx 125 PR Dr gerSensor CatEx 125 PR Gas...
Page 238: ...238 Dr ger X am 2500 4 6 4 6 1 A1 A1 O2 A1 A1 A1 A2 OK 4 6 2 A2 A2 O2 A1 A2 OK CatEx CatEx i i...
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