92
7 Appendix
7.11
Terminology and abbreviations
AL
●
Alarm
CENELEC
●
European Committee for Electrotechnical
Standardization
EC
●
Electrochemical sensor
Gas type
●
Hydrocarbon C
x
H
y
, which can be meas-
ured with the IR
●
One of the available gas types must al-
ways be set at a given time, as it is not
possible to measure more than one gas
type at the same time.
IR
●
Infrared sensor
LEL
●
Lower Explosion Limit
LTEL
●
Long time exposure limit
NiMH
●
Nickel metal hydride
OEL
●
Occupational exposure limit
ppm
●
Parts per million
Ring memory
●
Type of data storage in the device
●
If the available storage space is full, the
oldest file is automatically overwritten by
the current file.
SC
●
Gas-sensitive semiconductor
Stack memory
●
Type of data storage in the device
●
If the available storage space is full, you
are prompted to confirm whether the
oldest file should be overwritten by the
current file.
STEL
●
Short time exposure limit
% vol.
●
Percentage of a gas in a gas mixture
based on the volume