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7 Technical data
7.9
Technical information
Identification sticker
The pictogramme on the identification sticker (back of device)
signifies that the battery must only be opened outside the poten
-
tially explosive area!
Gas application
/
inerting
Gas application (increasing concentration to 100
% vol.) and in
-
erting (decreasing concentration to 0
% vol.) must be carried out
in the
Measuring
VOL%
application.
Unambiguous monitoring of the measurement is possible only
in this application.
Sensitivity of the catalytic combustion sensor
The sensitivity of the catalytic combustion sensor can be distorted
under the following conditions:
– Oxygen-deficient atmospheres lead to indication of lower values
(sensor suffocation).
–
Operation of the device in oxygen-enriched atmospheres is
impermissible to ensure explosion protection.
Gaseous components of
silicones, oils and phosphate esters, for
example, are harmful to the sensor. They cause an irreversible
decrease in sensitivity.
Impurities in the measuring environment, for example,
due to
halogens, burned neoprene, PVC or trichlorethylene, also de
-
crease the sensitivity of the sensors; in this case, however, the
sensitivity can be restored.
