Table 7-17: Troubleshooting Chart (continued)
Symptom Possible cause Action
Surface pulse is detected, but
Level is incorrectly reported
as Full or Empty.
• Wrong Probe Type set
• Bad Reference Threshold value
View the Diagnostics window, see
Diagnostics, to check active messages and
check if the warning “Full Tank/Empty
Tank” is active. If this is the case, check
that:
• the transmitter is configured with
correct probe type
• the reference pulse is below the
reference amplitude threshold. If not,
adjust reference threshold to an
appropriate value
The reference pulse is not
detected.
• The tank is full
• The transmitter is configured with
wrong probe type
• Reference Amplitude Threshold is
incorrect
• Check the product level
• Check that correct probe type is
configured
• Check Reference Amplitude Threshold
Large coaxial probe is used No action
Incorrect Interface Level
reading.
• Interface threshold incorrect
• Upper Product Dielectric constant
incorrect
• Adjust Interface threshold, see Example
2: Interface peak not found
• Check the Upper Product Dielectric
constant, see Upper product dielectric
constant
Incorrect level reading. • Configuration error
• Disturbing objects in the tank
• Check the Tank Height parameter
• Check status information and
diagnostic information
• Check that the transmitter has not
locked on an interfering object, see
Disturbance echo handling
• Adjust the Surface amplitude
threshold, see Example 1: Product
surface peak not found
Both Surface pulse and
Interface pulse are detected,
but no interface is present in
the tank.
Double bounce handling does not work
properly.
Verify that the following parameters are
correctly configured:
• Nozzle Height
• Upper Product Dielectric Constant
• Lower Product Dielectric Constant
Integral display does not
work.
• Check the display configuration
• Check loop power
• Check Display connection
• Contact Emerson Service
Department
(1)
Reference Manual Service and troubleshooting
00809-0100-4530 April 2019
Reference Manual 185
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