Flexim FLUXUS F704**-A2 Series, User Manual

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11 Advanced Measuring Functions FLUXUS F70x
UMFLUXUS_F7V4-6-2EN, 2017-10-01 105
11.7 Measurement of Highly Dynamic Flows (FastFood Mode)
The FastFood mode enables the measurement of flows with high dynamics.
A continuous adaptation to changing measuring conditions which takes place in the normal measuring mode is only par-
tially realized in the FastFood mode.
• The sound speed of the medium is not measured. Instead, the sound speed stored in the internal database is used, tak-
ing into account the medium temperature entered in the program branch
Parameter
(or the measured temperature if
the medium temperature is measured).
• A change of measuring channel is not possible.
• The inputs and outputs can still be used.
• The measured values are stored as usual.
• The FastFood mode has to be enabled and activated.
11.7.1 Enabling/Disabling the FastFood Mode
Press key C. Enter HotCode 007022 .
11.7.2 Storage Rate of the FastFood Mode
11.7.3 Activation/Deactivation of the FastFood Mode
If the FastFood mode is enabled and a measurement is started, the normal measuring mode will still be running (i.e. multi-
channel measurement with permanent adaptation to the measuring conditions). If the data logger is activated, the mea-
sured values will not be stored.
If the data logger is activated, a new series of measured values will be created and storing of measured values will be
started. If the FastFood mode is deactivated or if the measurement is interrupted, the storing will be stopped.
11.8 Calculation Channels
In addition to the ultrasonic measuring channels, the transmitter has two virtual calculation channels Y and Z. The mea-
sured values of the measuring all channels can be used for calculations by the calculation channels.
The result of the calculation is the measured value of the selected calculation channel. This measured value is equivalent
to the measured values of a measuring channel. All operations with the measured values of a measuring channel (totaliz-
ing, online transmission of data, storing, outputs, etc.) can also be done with the values of a calculation channel.
Select
yes
to enable the FastFood Mode,
no
to disable it.
If the FastFood mode is enabled, a
Storage Rate
in ms will have to be entered in the
program branch
Output Options
.
Press ENTER.
Press key to activate/deactivate the FastFood mode for the measuring channel cur-
rently displayed.
Press key to scroll through the upper line until the activated measuring mode
A:Mo-
de=FastFood
or
A:Mode=TransTime
is displayed.
Note! The values of the current series of measured values will be deleted if the FastFood mode is deacti-
vated and activated again without interrupting the measurement.
The values of the current series of measured values will be kept if the measurement is interrupted be-
fore the FastFood mode is activated again. A new series of measured values is created when the
next measurement is started.
Note! Calculation channels are only available if the transmitter has more than one measuring channel.
Enable FastFood
no
>YES<
Storage Rate
70 ms
A:Volume flow
54.5 m3/h
A:Mode=FastFood
54.5 m3/h