Ultraflux UF 801-P, Руководство пользователя

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NT228B GB2 30 / 98
------- PIPE -------
-------Chord1-------
Velocity = *****m/s
Sp.Sound = *****m/s
Time = ******µs
DeltaT = ******ns
Gain=**dB IQ =**
%

--------PIPE--------
Flow = ****m
3
/h
KH = *******
Rey = ******mm
Velocity = *****m/s

The flow velocity informs you about actual conditions compared to the typical
flow range of a flow meter (0.5 to 5 m/s).
A low velocity value signifies that actual conditions are more likely to have errors.
The Reynolds Number (see NT122) shows the flow turbulence coefficient.
If its value is less than 4000, you are informed that the laminar flow transition
could be very near.
The KH shows the applied automatic correction coefficient for the typical flow
profile.
It considers that the probe measurement section is chosen to have a fully
developed flow profile (available straight lengths).
In different conditions, this coefficient can be manually set via the Normal or
Advanced modes.
Speed of Sound value (Ultrasonic wave velocity) permits correlations with water
temperature.
Transit time is the raw transit time measurement.
Actual Delta T (given in nanosecond) is very important to estimate the possible
flow measurement error due to possible offset influence. The UF 801-P time
measurement resolution is smaller than 0.05 ns. Probe time accuracy depends on
their frequency. For instance, SE 1586 can offer better than 0.1 ns. But, if this
Delta T is very small and if actual flow zero has not been checked, you must
question yourself about the actual accuracy limits.
The amplification gain (in dB ) shows the signal strength. Lower amplification
means a stronger signal. This strength depends on probe choice and pipe
conditions.
I.Q (%) shows the signal rejection ratio. IQ=100 % means that all
measurements are accepted.