Operating Instructions

Table Of Contents
List of abbreviations
13
Short form Long form Description Units
3-A 3-A Sanitary Standards, Inc.
CE / FM / CSA Conformité Européene / Factory Mutu‐
al / Canadian Standards Association
safety approval
C
i
Internal capacitance F
D/A Dialog to analog
DCS Distributed Control System control room apparatus
dK dielectric constant
EDD Electronic Device Description
EHEDG European Hygienic Engineering Design
Group
FEA Flanged encapsulated antenna
FDA Food and Drug Administration
HEA Hygienic Encapsulated Antenna
HART Highway Addressable Remote Trans‐
ducer
I
i
Input current mA
I
o
Output current mA
IS Intrinsically Safe safety approval
L
i
Internal inductance mH
mH milliHenry 10
-3
H
μF microFarad 10
-6
F
μs microsecond 10
-6
s
NPS Nominal Pipe Size
PED Pressure Equipment Directive safety approval
pF pico Farads 10
-12
F
ppm parts per million
PV Primary Variable measured value
PVDF Polyvinylidene fluoride
SV Secondary Variable equivalent value
TB Transducer Block
TVT Time Varying Threshold sensitivity threshold
TFM1600 PTFE Modified PTFE polytetrafluoroethylene
with perfluoropropyl vi‐
nyl ether (PPVE) modifi‐
er
U
i
Input voltage V
U
o
Output voltage V
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 253