Dräger X-am 2500 Gebrauchsanweisung Seite 25

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.

Dräger X-am 2500
) are set to 0.
2
, the display is set to 20.9 vol. %.
2
appears and is displayed for the
Allowed test gas concentration:
Ex: 40 to 100 %LEL
O 10 to 25 vol. %
2
CO: 20 to 999 ppm
H S:5 to 99 ppm
2
Test gas concentrations of other gases: see Instructions for Use of
the respective DrägerSensors.
1. Connect the test gas cylinder with the calibration cradle.
2. Vent the test gas into a fume cupboard or into the open air (with a
hose connected to the second connector of the calibration cradle).
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.
4. Press the [+]-key and keep it pressed for 5 seconds to open the
calibration menu, enter the password (password on delivery = 001).
5. Use the [+]-key to select the single gas calibration function.
The symbol for span calibration
6. Press the OK-key to start the channel selection.
The display flashes the gas of the first measuring channel,
e. g. CH4 - %LEL.
7. Press the OK-key to start the calibration function of this measuring
channel, or use the [+]-key to select another measuring channel
(O - vol. %, H S - ppm or CO - ppm, etc.).
2 2
The calibration gas concentration is displayed.
8. Press the OK-key to confirm the calibration gas concentration or
use the [+]-key to change the calibration gas concentration and
complete the process by pressing the OK-key.
The measurement value flashes.
Operation
flashes.
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