Siemens ULTRAMAT 23 Series - Page 224

Abbreviation/symbol Description
PA Process Analytics
PA Polyamide, a plastic
PC Personal Computer, a stationary single-user computer
PCS Process Control System
PDM Process Device Manager, software for operating devices
PE Polyethylene, a plastic
PE Protective Earth (conductor)
PI PROFIBUS International
ppm parts per million (≙ 10
-6
)
PROFIBUS Process Field Bus
psi pounds per square inch; 1 psi ≈ 69 hPa
PTB Physikalisch-Technische Bundesanstalt (German technical inspectorate)
PTFE Polytetrafluoroethylene, a plastic, tradename e.g. Te󹪞on
PVDF Polyvinylidenefluoride, a plastic, tradename e.g. Kynar
QAL Quality Assurance Level
R22 Common name for chlorodi󹪞uoromethane, CHClF
2
RAM Random Access Memory
rel. relative
RH Relative Humidity
ROM Read Only Memory
RS Recommended Standard
RS 232 (also EIA-232) Identi󹪝es an interface standard for a sequential, serial data
transmission
RS 485 (also EIA-485) Identi󹪝es an interface standard for a di󹪜erential, serial data
transmission
s Second(s)
s. Refer to
SELV Safety Extra Low Voltage
SF
6
SF
6
= sulfur hexa󹪞uoride
SIPROM GA Siemens Process Maintenance for Gas Analyzers
SO
2
SO
2
= sulfur dioxide
SW Software
t time
T Temperature
TA Luft Technical Instructions on Air Quality Control (Germany)
TCP/IP Transmission Control Protocol/Internet Protocol; a reference model for Internet
communication
TÜV Technischer Überwachungsverein, German Technical Inspectorate
U Symbol for electric voltage
LEL Lower Explosion Limit
USB Universal Serial Bus
UV Ultraviolet
V Volt
List of abbreviations
C.1 List of abbreviations
ULTRAMAT 23
224 Equipment Manual, 04/2022, A5E37100388-012