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: PROFIBUS PA profile structure
- C Appendix C: Communications via PROFIBUS
- D Appendix D: Certificates and Support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB
247
List of abbreviations
13
Short form
Long form
Description
Units
AIFB
Analog Input Function Block
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
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
SELV
Safety extra low voltage
SV
Secondary Variable
equivalent value
TB
Transducer Block
TVT
Time Varying Threshold
sensitivity threshold
U
i
Input voltage
V
U
o
Output voltage
V