Siemens LR 460 User Manual
7ML19985JM01
SITRANS LR 460 – INSTRUCTION MANUAL
Page B-77
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Appendix B: Troubleshooting
1.
Check the following:
• There is power at the instrument.
• The LCD shows the relevant data.
• Check whether any fault codes are being displayed (see
• The LCD shows the relevant data.
• Check whether any fault codes are being displayed (see
on page 80 for a detailed list).
• The device can be programmed using the handheld programmer.
2.
Verify that the wiring connections are correct.
3.
Check the HART (or PROFIBUS) address and make sure all devices are at unique
HART (or PROFIBUS) addresses.
4.
If you continue to experience problems, go to our website at:
www.siemens.com/processautomation, and check the FAQs for SITRANS LR 460, or
www.siemens.com/processautomation, and check the FAQs for SITRANS LR 460, or
contact your Siemens Milltronics representative.
Troubleshooting LR 460
Symptom
Possible cause
Remedy
LR 460 reads
100%
continuously
100%
continuously
False echo near antenna.
Move LR 460 to better location.
Rotate LR 460 to change polarization
field.
Shorten vessel nozzle to allow antenna
to project into vessel.
Aim LR 460 away from false echo.
Rotate LR 460 to change polarization
field.
Shorten vessel nozzle to allow antenna
to project into vessel.
Aim LR 460 away from false echo.
Antenna buildup.
Clean antenna.
Install PTFE dust cover.
Use Air Purge option.
Install PTFE dust cover.
Use Air Purge option.
Reading is
frozen
frozen
Antenna buildup.
Clean antenna.
Install PTFE dust cover.
Use Air Purge option.
Install PTFE dust cover.
Use Air Purge option.
Low dK and low bulk
density material.
density material.
Lower echo confidence threshold.