User's Manual
Table Of Contents
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Threaded horn antenna
- 12.2 Threaded horn antenna with extension
- 12.3 Flanged horn antenna
- 12.4 Flanged horn antenna with extension
- 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.7 Threaded PVDF antenna
- 12.8 Threaded connection markings
- 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna
- 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.11 Flat-Face flange
- 12.12 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- B Appendix B: HART communications
- C Appendix C: Certificates and support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
SITRANS LR250 (HART)
Operating Instructions, 01/2014, A5E32220602-AB
245
List of abbreviations
13
Short form
Long form
Description
Units
CE / FM / CSA Conformité Européene / Factory Mutual
/ 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
FEA
Flanged encapsulated antenna
HART Highway Addressable Remote
Transducer
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
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
U
i
Input voltage
V
U
o
Output voltage
V