11 Advanced Measuring Functions
106
UMFLUXUS_F7V4-6-2EN, 2017-10-01
11.8.1
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.
A calculation channel cannot be attenuated. The damping factor has to be set separately for each 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
for measuring channels. Instead, it is defined in the unit of measurement of the physical quantity selected for the calcula-
tion 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.
11.8.2
Parametrization of a Calculation 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.
Three scroll lists are displayed in the upper line:
• selection of the first measuring channel (
ch1
)
• selection of the calculation function (
funct
)
• selection of the second measuring channel (
ch2
)
Select a scroll list with key
or
.
The list items are displayed in the lower line.
Scroll with key
and
through the scroll list. All measuring channels and their abso-
lute values can be used as input channels for the calculation.
The following calculation functions are available:
• -: Y = ch1 - ch2
• +: Y = ch1 + ch2
•(+)/2: Y = (ch1 + ch2)/2
•(+)/n: Y = (ch1 + ch2)/n
•|-|: Y = |ch1 - ch2|
Press ENTER.
This message will be displayed after the parametrization of the calculation channel if the
calculation function
(+)/2
is selected. The measured values of the calculation channel
(here:
Y
) will be valid if the measured values of both measuring channels (here:
A
and
B
) are
valid. If only one measuring channel provides valid measured values, the measured values
of the calculation channel will be invalid.
This message will be displayed after the parametrization of the calculation channel if the
calculation function
(+)/n
is selected. The measured values of the calculation channel
(here:
Y
) will be valid if the measured values of at least one measuring channel (here
A
or
B
)
are valid. If only one measuring channel provides valid measured values, these measured
values will be used for the calculation channel.
Parameter
↕
for Channel
Y:
Calculation:
Y= A - B
>CH1< funct ch2
↕
A - B
4
6
8
2
Y: is valid if
A: and B: valid
Y: is valid if
A: or B: valid
Summary of Contents for FLUXUS F704**-A2 Series
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