55
7 Appendix
7.6
Technical information
7.6.1
Sensitivity of the gas-sensitive semiconductor (SC)
Low-oxygen atmospheres can reduce the sensitivity of the gas-
sensitive semiconductor (sensor suffocation).
Gaseous constituents of silicones, oils and phosphate esters for
example have a damaging effect on the sensor. They permanently
reduce the sensitivity.
Contamination of the measurement environment with halogens,
burnt neoprene, PVC or trichloroethene for example also lowers
the sensitivity of the sensors, but they can be regenerated.
7.6.2
Electrostatic charge
Avoid electrostatically charging the device. Electrostatically un-
earthed objects (e.g. including metallic housing without an earth
connection) are not protected against applied charges (e.g.
through dust or dispersed flows).
A
NOTICE!
To prevent electrostatic charging when working with hy-
drogen H
2
, always use the carrying bag TG8.
7.6.3
Identification sticker (back of device)
The symbols on the sticker mean the following:
Only ever open the battery compartment outside of
explosive areas.
Read the operating instructions.
