Siemens Sitrans 사용자 설명서
7ML19985GE01
SITRANS LC 500 – INSTRUCTION MANUAL
Page 3
m
mmmm
Intr
oduct
oduct
io
n
Abbreviations and Identifications
Short form Long Form
Description
Units
A/D
Analog to Digital
CE / FM / CSA
Conformitè Europèene / Factory
Mutual / Canadian Standards
Association
Mutual / Canadian Standards
Association
safety approval
D/A
Digital to Analog
DAC
Digital Analog Converter
DCS
Distributed Control System
control room apparatus
ESD
Electrostatic Discharge
Ex
Explosion Proof
safety approval
Exd
Flame Proof
safety approval
FV
Full Vacuum
HART
Highway Addressable Remote
Transducer
Transducer
IS
Intrinsically Safe
safety approval
LRV
Lower Range Value
value for 0 %
4 mA
LSL
Lower Sensor Limit
below which no PV is
anticipated
anticipated
µ
F
micro Farads
10
-6
Farad
µ
s
micro Seconds
10
-6
Seconds
PED
Pressure Equipment Directive
safety approval
pF
pico Farads
10
-12
Farad
ppm
parts per million
PV
Primary Variable
measured value
Stilling Well
Grounded metal tube with
openings
openings
SV
Secondary Variable
equivalent value
SVLRV
Secondary Variable Lower
Range Value
Range Value
0% equivalent value
SVURV
Secondary Variable Upper
Range Value
Range Value
100% equivalent value
TV
Transmitter Variable
URV
Upper Range Value
value for 100%
20 mA
USL
Upper Sensor Limit
above which no PV is
anticipated
anticipated