Optronics PG11 - Abbreviations

14 Abbreviations
ATEX
Atmosphere Explosives
EC
Electrochemical detection technology.
EMC
Electromagnetic Compatibility
FS
Full Scale. Full gas range for the detector, for example 0 - 100 %LEL or 0 - 100
%vol.
HART
Highway Addressable Remote Transducer communication protocol
IR
Infrared light.
IECEx
International Electrotechnical Commission Explosion
LEL
Lower Explosive Limit
MODBUS
Master-slave messaging structure
SIL
Safety Integrity Level. This is used in accordance with the standard IEC 61508.
vol
Volume. Normal used as %vol for volume fraction.
1oo1
“One out of one”. Used in a SIL context, where only one detector is used to
decide if the detection of gas is valid.
1oo2
“One out of two”. Used in a SIL context. Two detectors are set up in a voting
configuration where if any of the two or just one detector are detecting gas,
the system will treat it as a Gas incident.
Document 022-80036-OM Revision R03 Page 47 of 48