Siemens ULTRAMAT 23 Manual page 236

List of abbreviations
C.1 List of abbreviations
Abbreviation/symbol
PC
PCS
PDM
PE
PE
PI
ppm
PROFIBUS
psi
PTB
PTFE
PVDF
QAL
R22
RAM
rel.
RH
ROM
RS
RS 232
RS 485
s
s.
SELV
SF
6
SIPROM GA
SO
SW
t
T
TA Luft
TCP/IP
TÜV
U
LEL
USB
UV
V
V.
VA
236
Description
Personal Computer, a stationary single-user computer
Process Control System
Process Device Manager, software for operating devices
Polyethylene, a plastic
Protective Earth (conductor)
PROFIBUS International
parts per million (≙ 10
Process Field Bus
pounds per square inch; 1 psi ≈ 69 hPa
Physikalisch-Technische Bundesanstalt (German technical inspectorate)
Polytetrafluoroethylene, a plastic, tradename e.g. Teflon
Polyvinylidenefluoride, a plastic, tradename e.g. Kynar
Quality Assurance Level
Common name for chlorodifluoromethane, CHClF
Random Access Memory
relative
Relative Humidity
Read Only Memory
Recommended Standard
(also EIA-232) Identifies an interface standard for a sequential, serial data
transmission
(also EIA-485) Identifies an interface standard for a differential, serial data
transmission
Second(s)
Refer to
Safety Extra Low Voltage
SF
6
Siemens Process Maintenance for Gas Analyzers
SO
2 2
Software
time
Temperature
Technical Instructions on Air Quality Control (Germany)
Transmission Control Protocol/Internet Protocol; a reference model for Inter-
net communication
Technischer Überwachungsverein, German Technical Inspectorate
Symbol for electric voltage
Lower Explosion Limit
Universal Serial Bus
Ultraviolet
Volt
Version
Voltampere
)
-6
= sulfur hexafluoride
= sulfur dioxide
2
ULTRAMAT 23
Manual, 3/2016, A5E37100388-003