FLUXUS F808, F809 12 Advanced measuring functions
118 UMFLUXUS_F808_8091V1-2-1EN, 2019-08-23
12.9.1 Enabling/disabling the FastFood mode
Enter HotCode 007022 (see section 9.5).
12.9.2 Storage rate of the FastFood mode
12.9.3 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 data set will be created and the storing of measured values will be started. If the Fast-
Food mode is deactivated or the measurement is interrupted, the storing will be stopped.
12.10 Calculation channels
In addition to the ultrasonic measuring channels, the transmitter has 2 virtual calculation channels Y and Z. The measured
values of the measuring channels A and B 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 which are possible with the measured values of a measur-
ing channel (totalizing, online transmission of data, storing, outputs, etc.) can also be done with the values of a calculation
channel.
12.10.1 Characteristics of the calculation channels
The measuring channels to be used for the calculation and the calculation function have to be entered in the program
branch Parameter.
A calculation channel cannot be attenuated. The damping factor has to be set separately for each of the two measuring
channels.
Two cut-off flow values for each calculation channel can be defined. The cut-off flow is not based on the flow velocity as is
the case with measuring channels. Instead, it is defined in the unit of measurement of the physical quantity selected for
the calculation channel. During the measurement, the calculated values are compared to the cut-off flow values and set to
zero if necessary.
A calculation channel provides valid measured values if at least one measuring channel provides valid measured values.
Select yes to enable the FastFood Mode, no to disable it.
If the FastFood mode is enabled, a time t has to be entered. When the FastFood mode is
started a search run will always be started after expiration of time t.
The search run is used to optimize the amplification settings.
Enter 0 if no search run is to be carried out.
If the FastFood mode is enabled, a Storage Rate in ms has to be entered in the program
branch Output Options.
Press ENTER.
During the measurement, select the command →Toggle FastFood in the upper line to
activate/deactivate the FastFood mode on the channel whose values are currently dis-
played. Press ENTER.
The activated measuring mode can be displayed in the upper line.
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<
FF-check (0=OFF)
0 min
Storage Rate
70 ms
A:Volume flow
54.5 m3/h
A:Mode=FastFood
54.5 m3/h
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