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Troubleshooting
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12.2 The diagnostic windows of the PortaSonic 9000
Signal window
In the signal window you can see the signal packages of both sensors. The first
signal package (UP) indicates the ultrasonic signals in the flow direction; the second
signal package (DOWN) indicates the ultrasonic signals against the flow direction.
Diagnostic window 1 of 2:
Frequency:
These are the transmitting frequencies of 500kHz (XUDC05), 1000kHz (XUDC10)
and 2000kHz (XUDC20).
Signal:
Indicates the signal form, the standard is 233, i.e. 2 pulses, then phase
commutating, subsequently 3 pulses, then phase commutating, then 3 pulses. By
commutating the phases, the signal will receive a special form (coding) and
can, therefore, also be found during interferences.
T1:
Is the signal transit time of one direction (either in or against the flow direction),
depending on the connection mode of the signal cables with the meter.
T2:
Is the signal transit-time of the other direction (either in or against the flow direction,
depending on the connection mode of the signal cables with the meter).
dT:
Is the transit-time difference of the signals.
vF:
Indicates the flow velocity of the medium.
Vs:
Indicates the sound velocity of the medium.
Reynolds:
The Reynold’s number will indicate if the cross section of the flow is laminar (<1400)
or turbulent (>8000).
Transmission coding:
Coding of the ultrasonic signals (see above „Signal“).
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