GE Baker Hughes PanaFlow LC XMT1000, User Manual

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Chapter 4. Error Codes and Troubleshooting
76 PanaFlow™ LC User’s Manual
Table 21: Flow Error description and Recommended Actions
Error Code Problem Cause Recommended Action
E1: SNR The Signal to Noise
ratio is low The acoustic signal from
the process is very weak.
This could be due to
bubbles, other fluid
conditions, an empty pipe,
broken cables,
transducers, couplant or
buffers Check if the Active Tw
measurement on upstream and
downstream transducers is valid. If
Active Tw measurement is valid
then this error is an indication of
the problem with the process
conditions.
If Active Tw measurement is not
valid then check the value entered
in SNR Min Error Limits option
(Refer Programming Chapter). Also,
refer to “
Fluid and Pipe Problems ”
and “ Transducer Problems ”
sections to correct for any issues
E2: Soundspeed The measured sound
speed exceeds
programmed limits The error may be caused
by incorrect
programming, poor flow
conditions or poor
transducer orientation. It
may also occur if signal
quality is poor Compare the measured sound
speed to programmed nominal
values for the process fluid and
correct any programming errors.
Refer to “
Fluid and Pipe Problems ”
and “ Transducer Problems ”
sections to correct for any issues.
In case you are unable to clear the
errors, gather the required
diagnostics before contacting
BHGE
E3: Velocity
Range The measured
velocity exceeds
programmed limits This error may be caused
by incorrect
programming, poor flow
conditions and/or
excessive turbulence Make sure the actual flow rate is
within the programmed Error
limits (Refer Programming
Chapter). Refer to
“Fluid and Pipe
Problems” and “Transducer
Problems” sections to correct any
issues
E4: Signal
Quality The signal quality is
lower than the
programmed limits This means the signal
shape, upstream to
downstream reciprocity,
or signal correlation value
has fallen below the
correlation peak limit. The
cause is usually the same
as E6 or E5 Make sure the Signal Quality is
greater than the programmed Error
limits (Refer Programming
Chapter). Refer to
“Fluid and Pipe
Problems” and “Transducer
Problems” sections to correct any
issues. Gather required diagnostics
data before contacting BHGE