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FLUXUS WW 12 Advanced measuring functions
88 UMFLUXUS_WWV1-1EN, 2018-02-28
12.9.3 Output options for a calculation channel
Make sure that the physical quantity selected for the calculation channel can be calculated from the physical quantities of
the selected measuring channels. Possible combinations are shown in Tab. 12.2.
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.
Press key
and
to scroll through the scroll list. All measuring channels and their
absolute values can be used as input channels.
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 parameterization 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 parameterization 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 mea-
sured values will be used for the calculation channel.
Select a calculation channel in the program branch
Output Options
.

Press ENTER.
Select the physical quantity to be calculated. Press ENTER.
Tab. 12.2: Physical quantity of the calculation channel
physical quantity of the

calculation channel
possible physical quantity of the
first measuring channel (CH1) possible physical quantity of the
second measuring channel (CH2)
flow velocity vo
lumetric
flo
w
ra
te
mass flow rate flow velocity vo
lumetric
flo
w
ra
te
mass flow rate
flow velocity x x x x x x
volumetric flow rate x x x x
mass flow rate x x x x
Example: The difference of the volume flow rates of the channels A and B is to be calculated.
The physical quantity of the measuring channel A and B can be the volumetric flow rate or the mass
flow, but not the flow velocity. The physical quantities of both measuring channels do not need to be
identical (channel A = mass flow, channel B = volumetric flow rate).
>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
Output Options ↕

for Channel Y:
Physic. Quant. ↕

Mass Flow