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
159
Service and maintenance
9
9.1
Maintenance
The radar device requires no maintenance or cleaning under normal operating conditions,
although periodic inspection and retightening of the attachment hardware may be required as
the gasket material will relax over time (dependant upon process conditions).
Under severe operating conditions, the antenna may require periodic cleaning. If cleaning
becomes necessary:
● Note the antenna material and the process medium, and select a cleaning solution that will
not react adversely with either.
● Remove the device from service and wipe the antenna clean using a cloth and suitable
cleaning solution.
9.2
Unit repair and excluded liability
All changes and repairs must be done by qualified personnel, and applicable safety regulations
must be followed. Please note the following:
● The user is responsible for all changes and repairs made to the device.
● All new components must be provided by Siemens Milltronics Process Instruments.
● Restrict repair to faulty components only.
● Do not re-use faulty components.
9.3
Part replacement
If the antenna, lens, secondary o-ring, and spring washers require replacement due to damage
or failure, they may be replaced without the need for re-calibration if of the same type and size.
Replacing the antenna
Changing to a different antenna type may be performed by a Siemens authorized repair center
or personnel.
If the electronics or enclosure require replacement due to damage or failure, please ensure the
correct antenna version is used, otherwise a re-calibration will need to be performed by Siemens
authorized personnel.