Emerson Rosemount 5408 Reference Manual page 106

Service and troubleshooting
March 2023
Level is stuck in full tank
Figure 7-3: Symptom
A. Level
B. Time
C. Actual level
D. Reported level
Possible cause
Disturbing object near the antenna.
Recommended actions
•
•
•
•
•
•
Possible cause
Product build-up on the antenna.
Recommended actions
•
•
Possible cause
Cone antenna does not extend below the nozzle.
Recommended actions
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106
A
C
D
Use the suppress false echoes function to manage strong disturbance echoes.
Analyze the echo curve and check amplitude thresholds.
For process seal antenna installed in a nozzle taller than 10-in. (25 cm), adjust the
pre-configured amplitude threshold.
Increase the Upper Null Zone.
Remove the disturbing object.
Move the transmitter to another position.
Clean the antenna.
Use transmitter with air purging connection.
Use the extended cone antenna.
Reference Manual
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00809-0100-4408
Reference Manual