51
Maintenance
Calibrating the sensitivity for an individual measuring channel
The span calibration can be carried out specifically for individual sensors.
In the case of the span calibration, 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:
Connect the test gas cylinder with the
calibration cradle.
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).
Switch on the device and insert it into the calibration cradle.
Press and hold the [+] key for 5 seconds to call the calibration menu, enter the
password and select the single gas calibration function, page 20.
Press the key to start the channel
selection.
The display flashes the gas of the first
measuring channel, e.g., » Ex -
%LEL «.
Press the key to carry out the
calibration of this measuring channel,
or
Use the key to select another
measuring channel (O
2
- vol. %, H
2
S
- ppm or CO - ppm).
Ex: 40 to 100 %LEL
O
2
: 10 to 25 vol. %
CO: 20 to 999 ppm
H
2
S: 5 to 99 ppm
NO
2
: 5 to 99 ppm
Test gas concentration of other gases:
refer to the Instructions for Use of the
respective DrägerSensors.
CAUTION
Health hazard!
Do not inhale the test
gas. Risk to health!
Observe the hazard warnings of the
relevant Safety Data Sheets.
02723999_01_en.eps
0
0.5 L/min
CH4
%LEL
O
2
Vol%
CO
ppm
H
2S
ppm
X-am 5000
03523999_01_en.eps
ch
4
%LEL
CO
2
ppm
O
2
Vol%
CO
ppm
H
2
S
ppm
NH
3
ppm
OK
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