9 Measurement
9.3 Start of the measurement FLUXUS F501
2020-06-30, UMFLUXUS_F501V1-3EN
80
Profile correction
If With disturbance is selected in the menu item Special Funct.\SYSTEM settings\
Measuring\ProfileCorr 2.0, it has to be checked whether the measurement arrangement is appropriate.
If the number of sound paths is odd and more than one measuring channel is activated, the following display appears:
• Select no if there are 2 transducer pairs in X arrangement or displaced X arrangement at the measuring point
(appropriate measurement arrangement). The profile correction 2.0 at non ideal inflow conditions will be used.
Transverse flow effects will be compensated.
• Select yes if there is only one transducer pair at the measuring point (inappropriate measurement arrangement). The
profile correction 2.0 at non ideal inflow conditions cannot be used. The profile correction 2.0 at ideal inflow conditions
will be used. Transverse flow effects will not be compensated.
• Press ENTER.
If yes is selected, the following menu messages are displayed:
Adjustment of the transducer distance
The recommended transducer distance will be displayed.
• Mount the transducers on the pipe adjusting the transducer distance.
• Press ENTER.
Reflec – reflection arrangement
Diagon – diagonal arrangement
The transducer distance is measured between the inner edges of the transducers.
In case of a measurement in diagonal mode on very small pipes, a negative transducer distance is possible.
The diagnostics window is displayed, see Fig. 9.1.
Fine adjustment of the transducer distance
• If the displayed transducer distance is adjusted, press ENTER.
The measuring run for the positioning of the transducers is started.
The bar graph S= shows the amplitude of the received signal, see Fig. 9.1.
• Shift one of the transducers slightly within the range of the recommended transducer distance until the bar graph reaches
the max. length (6 squares).
• ■<>■ transducer distance
• time: transit time of the measuring signal in μs
• S: signal amplitude
• Q: signal quality, bar graph has to have max. length
If the signal is not sufficient for a measurement, Q= UNDEF will be displayed.
Measuring\...\Transd. Distance
Notice!
The accuracy of the recommended transducer distance depends on the accuracy of the entered pipe and fluid
parameters.
A: Alone at measp
>NO< yes
Disturb correct.
not applicable!
I assume ideal
inlet conditions
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