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: Communications via Foundation Fieldbus
- C Appendix C: Certificates and support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
Parameter reference
SITRANS LR250 (FOUNDATION FIELDBUS)
Operating Instructions, 01/2014, A5E32221411-AB
143
Far Range (2.5.2.)
Note
Far Range can extend beyond the bottom of the vessel.
Allows the material level to drop below Low Calibration Point without generating a Loss of Echo
(LOE) state. See
Low Calibration Pt. (2.3.7.1.)
for an illustration.
Values
Range: Min. =
Low Calibration Pt.
Max. =
33
m (108.27 ft)
Default: Value for Low Calibration Pt. + 1 m (3.28 ft)
Related parameters
Unit (2.3.1.)
CLEF (Constrained Leading Edge Fit) Range (2.5.7.4.)
a)
a)
The value set for Far Range becomes the CLEF Range maximum. If the value for Far Range is
changed after a CLEF Range value is entered, CLEF Range is reset to its default (0.00 m).
Use this feature if the measured surface can drop below the Low calibration point in normal
operation.