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
Service and maintenance
9.2 Part replacement
SITRANS LR250 (HART)
170 Operating Instructions, 01/2014, A5E32220602-AB
Replacing the lens
1. Remove existing lens by turning it counter-clockwise until it separates from the unit.
2. Replace the O-ring between the lens and process connection with a new one.
3. Carefully thread the replacement lens, and turn it clockwise until resistance is encountered.
Do not over-tighten the lens, as this will permanently damage it.
4. For flange installation instructions, see Flange bolting, Flanged encapsulated antenna only
(Page 22).
Note
After installation, some lenses may not appear to lie flush on the device, but t
his will not
impact performance.
Raised-Face flange kits
Description
Process
connection
size
Part number
Replacement TFM
TM
1600 PTFE Lens and Spring Washer
Kit for ASME B16.5 Class 150 raised faced
2"
A5E32462817
3"
A5E32462819
4"
A5E32462820
6"
A5E32462821
Replacement TFM
TM
1600 PTFE Lens and Spring Washer
Kit for JIS B 2220 10K raised Face
50A
A5E32462822
80A A5E32462823
100A
A5E32462824
150A
A5E32462825
Replacement TFM
TM
1600 PTFE Lens and Spring Washer
Kit for EN 1092-1 PN10/16 type B1 raised face
DN50
A5E32462826
DN80
A5E32462827
DN100
A5E32462828
DN150
A5E32462829