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9 Measurement
9.3 Start of the measurement
FLUXUS F502TE
2020-05-29, UMFLUXUS_F502TEV1-5EN
86
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.
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 with
.
The optimum transducer distance is displayed in brackets (here: 50.0 mm) in the upper line, followed by the entered trans
-
ducer 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 approxima
-
tion 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
S=■■■■■■
Q:■■■■■■■■■■■■
time=
94.0 µs
Q:■■■■■■■■■■■
L=(50.0) 54.0 mm
54.5
m3/h
Содержание FLUXUS F502BT
Страница 1: ...FLUXUS F502TE UMFLUXUS_F502TEV1 5EN Operating instruction...
Страница 6: ...Table of contents FLUXUS F502TE 2020 05 29 UMFLUXUSF502TEV1 5EN 6...
Страница 144: ...19 Thermal energy rate measurement 19 4 Steam in inlet FLUXUS F502TE 2020 05 29 UMFLUXUS_F502TEV1 5EN 144...
Страница 160: ...Annex D Conformity declarations FLUXUS F502TE 2020 05 29 UMFLUXUS_F502TEV1 5EN 160 D Conformity declarations...
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