10 Basic measurement FLUXUS WW
UMFLUXUS_WWV1-1EN, 2018-02-28 75
10.4 Input of the sound path number
10.5 Transducer distance
The transducer distance is the distance between the inner edges of the transducers (see section 4.3 and Fig. 7.5).
In case of a measurement in diagonal mode on very small pipes, a negative transducer distance is possible.
10.5.1 Fine adjustment of the transducer distance
In case of large deviations, check if the entered parameters are correct or repeat the measurement at a different point on
the pipe.
Repeat the steps for all channels on which a measurement is made. The measurement will be started automatically.
A value for the number of sound paths corresponding to the connected transducers and the
entered parameters is recommended. Change the value, if necessary. Press ENTER.
For the definition of the sound paths, see section 4.3.
A value for the transducer distance is recommended. Fix the transducers (see chapter 7.3).
Adjust the transducer distance.
Press ENTER.
A - measuring channel
Reflec - reflection arrangement
Diagon - diagonal arrangement
Note! The accuracy of the recommended transducer distance depends on the accuracy of the entered pipe
and fluid parameters.
If the displayed transducer distance is adjusted, press ENTER.
The measuring run for the positioning of the transducers is started.
• Shift one transducer slightly within the recommended transducer distance range until the
bar graph reaches the max. length (max. 6 squares).
The following quantities can be displayed in the upper line by pressing key and in the
lower line by pressing key :
• ■ <>■ =: 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.
After the precise transducer positioning, the recommended transducer distance is dis-
played again.
Enter the current (exact) transducer distance. Press ENTER.
A:
2NUM
A: Sound Path
2 NUM
Transd. Distance
A:53.9 mm Reflec
Transd. Distance
A: 53.9 mm !
S=■ ■ ■ ■ ■ ■
A:■ < >■ =53.9 mm!
S=■ ■ ■ ■ ■ ■
Q=■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
time= 94.0 μs
Q=■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
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