Start Of Measurement; Installation - Emerson Flexim FLUXUS F721 Operating Instructions Manual

9 Measurement

9.3 Start of measurement

9.3 Start of measurement

Installation

Sound path
Transducer distance
Signal test
Transducer distance
Measurement display
see annex A
If the list item 2 meas. points (A|B) is selected in the menu item Parameters\Measuring point config., the
following settings are queried for each measuring point.
Calibration of the temperature calculation from the sound speed
The transmitter is able to calculate the temperature from the sound speed of the fluid during the measurement. The
accuracy of the measured sound speed of the fluid depends on the accuracy of the entered parameters or on the
mounting of the transducers.
If the temperature has to be calculated from the sound speed of the fluid during the measurement, a calibration based on
the actual fluid temperature is carried out when starting the measurement. It has to be measured and entered in the
transmitter. From the difference of the entered fluid temperature and the sound speed of the calculated fluid temperature
an offset is determined and stored in the transmitter.
If the measurement is started the first time with activated calculation of the fluid temperature from the sound speed, the
transmitter does not have stored any offset yet. The fluid temperature has to be entered.
Installation\Fluid temp.
• Enter the measured fluid temperature.
• Press ENTER.
This display will only be indicated if the calculation of the temperature offset is enabled in the menu item Miscellaneous\
Special settings\Fluid: c -> T.
Notice!
After starting the measurement the determination of the offset can last up to 2 minutes (100 sound speed
measurements are averaged).
Input of the sound path number
Installation\Sound path
• Enter the number of sound paths.
• Press ENTER.
Adjustment of the transducer distance
Installation\Transducer distance
The recommended transducer distance will be displayed. The transducer distance is measured between the inner edges
of the transducers. In case of a measurement in diagonal arrangement on very small pipes, a negative transducer distance
is possible.
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Start measurement
Before starting the measurement, the measuring point has
to be parameterized. If another measurement has already
been performed using the same measuring point
parameters, the measurement can be started immediately.
• Select the menu Start measurement.
• Press ENTER.
The measurement is started. The measured values are
displayed.
In case parameters or the measurement arrangement have
changed, the measurement has to be started via the menu
Installation.
• Select the menu Installation.
• Press ENTER.
FLUXUS F72*
2024-03-01, UMFLUXUS_F72xV2-2EN