PanaFlow™ XMT1000 User’s Manual 67
Chapter 4. Error Codes and Troubleshooting
Table 23: 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 to
Chapter 3, Programming). 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
Panametrics
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
(Referto 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 to Programming Chapter).
Refer to “Fluid and Pipe Problems” and
“Transducer Problems” sections to
correct any issues. Gather required
diagnostics data before contacting
Panametrics
E5: Amplitude The signal amplitude
exceeds the
programmed limits
This error may occur due to
high signal attenuation or
amplification due to
changes in fluid properties,
transducer, buffer and/or
couplant issues
Make sure the amplitude is within the
programmed limits.
If the gain is negative and Amplitude
> 32, change the Transmit Voltage to
“Low”. If it is still negative, enable
Attenuator. Do not enable Attenuator
if the Transmit Voltage is high.
If the gain is greater than 35 dB,
change the Transmit Voltage to
“High” (Refer to Programming
Chapter). Refer to “Fluid and Pipe
Problems” and “Transducer Problems”
sections to correct any issues. Gather
required diagnostics data before
contacting Panametrics
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