9 Measurement
FLUXUS F501 9.3 Start of the measurement
81
UMFLUXUS_F501V1-3EN, 2020-06-30
In case of large deviations, check if the entered parameters are correct or repeat the measurement at a different point on
the pipe.
After the precise transducer positioning, the recommended transducer distance is displayed again.
• Enter the current (exact) transducer distance.
• Press ENTER.
Afterwards, the measurement will be started automatically.
Consistency check
If a wide range for the sound speed has been entered in the program branch Parameter or the exact parameters of the
fluid are unknown, a consistency check is recommended.
The transducer distance can be displayed during the measurement by scrolling the key .
The optimum transducer distance is displayed in brackets (here: 50.0 mm) in the upper line, followed by the entered transducer
distance (here: 54.0 mm). The latter value has to correspond to the adjusted transducer distance.
• Press ENTER to optimize the transducer distance.
The optimum transducer distance is calculated on the basis of the measured sound speed. It is therefore a better approximation
than the first recommended value which had been calculated on the basis of the sound speed range entered in the program
branch Parameter.
If the difference between the optimum and entered transducer distance is less than specified in Tab. 9.4, the measurement is
consistent and the measured values are valid. The measurement can be continued.
• If the difference is greater, adjust the transducer distance to the displayed optimum value.
• Afterwards, check the signal quality and the signal amplitude bar graph.
• Press ENTER.
Fig. 9.1: Diagnostics window
Measuring\...\Transd. Distance\54 mm
Tab. 9.4: Standard values for signal optimization
transducer frequency max. difference between the optimum and the entered transducer distance [mm]
K 15
M 10
P 8
Q 6
Notice!
If the transducer distance is changed during the measurement, the consistency check has to be repeated once again.
S=■■■■■■
Q:■■■■■■■■■■■■
time= 94.0 µs
Q:■■■■■■■■■■■
L=(50.0) 54.0 mm
54.5 m3/h
To Next Page
Loading...
Need help?
General
