20 Advanced functions
20.2 Calculation channels
PIOX S72*
2022-05-15, UMPIOX_S72xV1-9EN
174
20.1.4
Totalizer behavior after the measurement is stopped
It is possible to define the totalizer behavior after the measurement is stopped or after a reset of the transmitter.
• Select the menu item
Totalizers
in the program branch
Special functions
.
• Press ENTER until the menu item
Keep totalizers
is displayed.
• Select
Yes
if the values of the totalizers are to be stored and used for the next measurement. Select
No
if the totalizers
are to be set to zero.
• Press ENTER.
20.1.5
Totalizer sum
The sum of the totalizers for both flow directions can be displayed in the status line during the measurement.
• Select the menu item
Totalizers
in the program branch
Special functions
.
• Press ENTER until the menu item
Show
Σ
Q
is displayed.
• Select
Yes
to display the totalizer sum. Select
No
if it is not to be displayed.
• Press ENTER.
20.1.6
Totalizer storing
The totalizer values can be stored now.
• Select the menu item
Special functions\Data logger\Configuration
.
• Press ENTER until the menu item
Store totalizers
is displayed.
• Select
Yes
.
• Press ENTER.
20.2
Calculation channels
In addition to the ultrasonic measuring channels, the transmitter has 2 virtual calculation channels Y and Z which calculate
the measured values of all measuring channels.
The result of the defined calculation function 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 measuring channel (totalizing, storing, outputs, etc.) can also be done with the measured values of a
calculation channel.
20.2.1
Characteristics of the calculation channels
The measuring channels to be used for calculation and the
calculation function have to be entered in the program
branch
Parameters
.
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.
Special functions\Totalizers\Keep totalizers
Special functions\Totalizers\Show
Σ
Q
Notice!
Calculation channels are only available if the transmitter has more than one measuring channel.
Parameters
Channel x
Calculation
Calculation type
see annex A
