Siemens Set CEM CERT, Operating Instructions Manual, Page: 126 / 128

List of abbreviations
C.1 List of abbreviations
Set CEM CERT
124
Operating Instructions, 06/2021, A5E34491309-12
Abbreviat
ion/
Character Meaning
NDIR N on- d ispersive i nfra r ed
NE 107 ⇒ NAMUR Recommendation concerning guidelines for self-monitoring and diagnosis
of field devices
NH
3
Chem. formula for ammonia
NO Chem. formula for nitrogen monoxide
NO
2
Chem. formula for nitrogen dioxide
NO
x
Generic designation for different nitrogen oxides
O
2
Chem. formula for oxygen
PVDF P oly v inyli d ene f luoride, a plastic
PTFE P oly t etra f luoro e thylene, a plastic; Teflon
TM
is one of its trade names
QAL Q uality A ssurance L evel
RAL RAL - Deutsches Institut für Gütesicherung und Kennzeichnung
(German Institute for Quality Assurance and Certification)
RH R elative h umidity
SO
2
Chem. formula for sulfur dioxide
PLC P rogrammable l ogic c ontroller
TA Luft Technical Instructions on Air Quality Control (Germany)
TDLAS T unable D iode L aser A bsorption S pectroscopy
TÜV T echnischer Ü berwachungs v erein, monitoring and certification authority in Germany
UPS U ninterruptible p ower supply
V V olt, unit of voltage
VA V olt- a mpere, unit of apparent power S
VDE
V erband d er E lektrotechnik, Elektronik und Informationstechnik (German
Association for Electrical, Electronic and Information Technologies)
Vol. Vol ume