AquaTrans™ AT600 User’s manual
75
Chapter 5. Error codes and troubleshooting
Chapter 5. Error codes and troubleshooting
5.1
Error display in the user interface
The bottom line of the LCD displays a single, top priority error message during operation. This line, called the error line,
includes two parts: error header and error string. The error header indicates the error pattern and error number, while
the error string gives a detailed description of the error information.
5.1.1
Error header
5.1.2
Flow error string
Flow errors are errors that occur during 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. Flow errors are typically not caused by a malfunction of the flow measurement
device, but by a problem with the fluid itself or with the process piping.
Error pattern
Error header
Flow error
En (n is error number)
Device error
Dn (n is error number)
Warning
Sn (n is error number)
Option Bar
Description
Good
Bad
Tup
Displays the upstream ultrasonic signal transit time.
NA
NA
Tdn
Displays the downstream ultrasonic signal transit time.
NA
NA
DeltaT
Displays the transit time difference between the upstream and
downstream signals.
NA
NA
Up signal quality
Displays the signal quality for the upstream transducer.
≥1200
<400
Dn signal quality
Displays the signal quality for the downstream transducer.
≥1200
<400
Up amp disc
Displays the value for the signal amplitude of the upstream
transducer.
24±5
<19 or >29
Dn amp disc
Displays the value for the signal amplitude of the downstream
transducer.
24±5
<19 or >29
SNR up
Display the value for the signal-to-noise of the upstream signal. ≥4
<4
SNR Dn
Display the value for the signal-to-noise of the downstream
signal.
≥4
<4
Gain up
Display the value for the gain of the upstream transducer.
9-85
<9 or >85
Gain Dn
Display the value for the gain of the downstream transducer.
9-85
<9 or >85
Up peak
Displays the first value in the upstream correlation signal, which is
more than the positive threshold or is less than the negative
threshold.
NA
NA
Dn peak
Displays the first value in the downstream correlation signal,
which is more than the positive threshold or is less than the
negative threshold.
NA
NA
PeakPctUp
Displays the percentage of peak of the upstream signal.
NA
NA
PeakPctDn
Displays the percentage of peak of the downstream signal.
NA
NA
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