GE PanaFlow XMT1000, User Manual

Page: 38 / 96

Chapter 3. Error Codes and Troubleshooting
26 PanaFlow™ XMT1000 User’s Manual
3.1.3 Flow Error String
Flow errors are errors detected by the Flow PCB in the course of making a flow measurement. These errors can be
caused by disturbances in the fluid, such as excessive particles in the flow stream or extreme temperature gradients.
The errors could also be caused by an empty pipe or other such issue with the fluid itself. Flow errors are typically not
caused by a malfunction of the flow measurement device, but by an issue with the fluid itself.
Note:
For troubleshooting tips, see “Diagnostics” on page 27 .
Table 4: Flow Error String
Error Code Error Message Description
E1
: SNR The Signal to Noise ratio is
low. The acoustic signal from the process is very low. This could
be due to bubbles, other fluid conditions, an empty pipe,
broken cables, transducers, couplant or buffers.
E2
: Soundspeed The measured soundspeed
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.
E3 : Velocity Range The measured velocity exceeds
programmed limits. This error may be caused by incorrect programming, poor
flow conditions and/or excessive turbulence.
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
.
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, or
transducer/buffer/couplant issues.
E6
: Cycle Skip A cycle skip is detected while
processing the signal for
measurement. This is usually due to poor signal integrity, possibly because
of bubbles in the pipeline, sound absorption by very viscous
fluids, or cavitation.
E15
: Active Tw The Active Tw measurement is
invalid. A transducer or cable is damaged, or a transducer needs to
be re-coupled. This may also be due to incorrect
programming, or extreme process temperatures.
E22
: Single Channel
Accuracy
One of the measurement
channels is in error. One measurement channel is in error; accuracy of the
measurement may be compromised because the meter might
be using a sister chord substitution.
E23
: Multi Channel
Accuracy
Two or more measurement
channels are in error. Two or more measurement channels are in error; accuracy of
the measurement may be compromised because the meter is
using a sister chord substitution.
E28
: Software Fault There is a software malfunction This is a software malfunction. Try power cycling the meter.
If the error persists after power cycle, contact GE factory.
E29 : Velocity Warning The measured velocity exceeds
programmed warning limits.
This error may be caused by incorrect programming, poor
flow conditions and/or excessive turbulence.
E31
: Not Calibrated The flow meter has not been
calibrated. The flow meter has not been calibrated and hence is not
making measurements.