Flexim PIOX S704 NN Series User Manual

12 Advanced Measuring Functions PIOX S70x
UMPIOX_S7V4-6-3EN, 2018-10-10 113
12.8 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.
12.8.1 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.
12.8.2 Parametrization of a Calculation Channel
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.
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

Flexim PIOX S704 NN Series Specifications

General

Brand	Flexim
Model	PIOX S704 NN Series
Category	Measuring Instruments
Language	English