Siemens FIDAMAT 6 - Page 189

List of abbreviations
B.1 List of abbreviations
FIDAMAT 6
Operating Instructions, 01/2019, A5E00222135-04
187
Abbreviation/symbol
Explanation
mm
millimeter
mm²
Square millimeter
SV
Solenoid valve
mΩ
m
illiohm
MΩ
Megaohm
NAMUR
N
ormen
a
rbeitsgemeinschaft für
M
ess-
u
nd
R
egeltechnik in der
chemischen Industrie
(standardization body for instrumentation
and control technology in the chemical industry)
n. g.
If requried
NC
Not Connected
No.
Number
p
Symbol for pressure
O
2
Chem. formula for oxygen
o. Ä.
Or similar
PA
Process Analytics
PC
Personal Computer
pF
picofarad (10
-12
farad)
PNO
PROFIBUS-Nutzer-Organisation (PROFIBUS user organization)
ppb
parts per billion
ppm
parts per million
PROFIBUS
Process Field Bus, a standard for fieldbus communication
PTFE
Polytetrafluoroethylene, a plastic, tradename e.g. Teflon
QAL
Q
uality
A
ssurance
L
evel
RAM
Random Access Memory
rel.
relative
RJ 45 RJ =
R
egistered
J
ack, standard plug connection for telecommuni-
cation cables
ROM
Read Only Memory
RS 232 (also EIA-232) Identifies an interface standard for a wired serial
data transmission
RS 485 (also EIA-485) Identifies an interface standard for a wired differen-
tial, serial data transmission
RxD, RD
Received exchange Data
s
second
SIPROM GA
Siemens Process Maintenance for Gas Analyzers
SW
Software
t
Symbol for time
TA Luft
Technical Instructions on Air Quality Control (Germany)
TCP/IP
T
ransmission
C
ontrol
P
rotocol/
I
nternet
P
rotocol; a reference model
for Internet communication
THC
Total hydrocarbons
TC
Temperature compensation
TÜV
Technischer Überwachungsverein, German Technical Inspectorate