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12 Advanced measuring functions FLUXUS WW
UMFLUXUS_WWV1-1EN, 2018-02-28 87
12.8.2 Storage rate of the FastFood mode
12.8.3 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.
12.9 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 calculated via 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 functions which are possible with the measured values of a measuring
channel (totalizing, online transmission of data, storing, outputs, etc.) can also be done with the values of a calculation
channel.
12.9.1 Characteristics of the calculation channels
In the program branch
Parameter
, the measuring channels to be used for the calculation and the calculation function
have to be entered.
It is possible to define 2 cut-off flows for each calculation channel. The cut-off flow is not based on the flow velocity as is
the case with the measuring channels. Instead, it is defined in the unit of measurement of the physical quantity selected
for the calculation channel. During the measurement, the calculation values are compared with the cut-off values and set
to zero, if necessary.
A calculation channel provides valid measured values if at least one measuring channel provides valid measured values.
12.9.2 Parameterization of a calculation channel
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:Mode=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.
Select a calculation channel (Y or Z) in the program branch Parameter . Press ENTER.
The current calculation function is displayed. Press ENTER to edit the function.
Storage Rate

70 ms
A:Volume flow

54.5 m3/h
A:Mode=FastFood

54.5 m3/h
Parameter ↕

for Channel Y:
Calculation:

Y= A - B