Dräger X-am 2500 Instrucciones De Uso página 32

Operation
4.9.4 Adjustment
Adjustment may not be possible due to instrument and channel errors.
NOTICE
i i
Dräger recommends using the extended bump test for cross
calibrations (Dräger X-dock technical manual).
Carrying out the fresh air adjustment
Adjust the instrument to fresh air, free of measured gases or other
interfering gases. During the fresh air adjustment the zero point of all
sensors (with the exception of the DrägerSensor XXSO
In the case of the DrägerSensor XXS O
1. Switch on instrument.
2. Press the [+] key 3 times, the symbol for fresh air adjustment
appears.
3. Press the OK key to start the fresh-air adjustment 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 adjustment function or wait for
approx. 5 seconds.
If a fault has occurred during the fresh air adjustment:
a. The fault message
respective sensor instead of the measured value.
b. In this case, repeat the fresh air adjustment.
If necessary, have the sensor replaced by qualified personnel.
32
) are set to 0.
2
, the display is set to 20.9 vol. %.
2
appears and is displayed for the
Adjusting the sensitivity for an individual measuring channel
The span adjustment can be carried out selectively for individual

sensors.
In the case of the span adjustment, the sensitivity of the selected

sensor is set to the value of the test gas used.
Use a standard test gas.

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 adjustment function.
The symbol for span adjustment
6. Press the OK key to start the channel selection.
The display flashes the gas of the first measuring channel,
e.g. ch4 %LEL.
flashes.
Dräger X-am 2500