40
Maintenance
Calibrating/adjusting the sensitivity
for a single 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 used test gas.
— Use a standard test gas.
Allowed test gas concentration:
● Connect the test gas cylinder with the ca-
libration cradle.
● Vent the test gas leaving the adapter into
a fume cupboard or into the open air (with
a hose connected to the second connec-
tor of the calibration cradle).
● Switch on the device and insert it into the
calibration cradle.
● Press the [ + ] key and keep it depressed
for 5 seconds to call the calibration menu,
enter the password and select the "span
calibration" function, page 16.
● Press the key to start the span cali-
bration.
— The display flashes the gas of the first
measuring channel, e.g. » Ex - %LEL «.
● Press the key to carry out the calibra-
tion of this measuring channel.
or
● Use the key to select another measu-
ring 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
CAUTION
Do not inhale the test gas. Risk to health!
Observe the hazard warnings of the rele-
vant Safety Data Sheets.
02723854_01_en.eps
0
0.5 L/min
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