Siemens SITRANS F Mode D'emploi page 43

Error or Message
Low Signal - Press <ENTER>
Detection Fault
Note
If you receive a Detection Fault message, it is strongly recommended that the Technical
Service Department (http://www.automation.siemens.com/partner) be contacted.
FUH1010 IP65 NEMA 7 Interface Detector Quick Start
Operating Instructions, 06/2014, A5E02428148-AA
Probable Cause
During the Initial Makeup the flow
meter decides that the level of the
receive signal is insufficient for proper
operation.
If it appears that the flow meter cannot
complete an Initial Makeup it means
that the pipe and/or liquid conditions do
not permit a receive signal that meets
the flow detection standards.
The system will not operate.
Troubleshooting
4.1 Troubleshooting
Solution
Some reasons for low signal are:
Invoking [Install Complete?] on an
•
empty pipe.
Coupling compound insufficient not
•
applied or evaporated. Reapply
couplant.
A disconnected or broken sensor
•
cable.
The pipe needs to be conditioned at
•
the mounting location.
Flush out large air bubbles.
•
The sensor cables are defective or
•
not connected to the correct
channel.
The Set Empty routine performed
•
when pipe was NOT actually empty.
If you locate and correct the
•
improper condition immediately,
trigger <ENTER> to resume the
installation procedure. Otherwise,
trigger the <Left Arrow> to abort the
installation and conduct a thorough
investigation.
Attempt to improve operating
conditions by reinstalling the sensors at
a different spacing offset, or even at a
different location on the pipe.
Switching from Reflect to Direct Mount
may solve the problem. However,
operation may not be possible if there
is poor liquid, pipe wall sonic
conductivity or extreme liquid aeration.
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