Additional functions Liquistation CSF48
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6.3 Mathematical functions
In addition to "real" process values which are delivered by analog inputs or physical sensors
connected to the device, you can also calculate a maximum of 6 "virtual" process values using
mathematical functions.
The "virtual" process values can be:
• Output via a current output or a fieldbus
• Used as a controlled variable
• Assigned as a measured variable to a limit contactor
• Used as a measured variable to trigger cleaning
• Displayed in user-defined measuring menus
6.3.1 Difference
You can subtract the measured values of two sensors and use the result to detect incorrect
measurements, for example.
To calculate a difference, you must use two measured values with the same engineering unit.
Path: Menu/Setup/Additional functions/Mathematical functions/MF 1 to 6/Mode/Difference
Function Options Info
Calculation Options
•Off
•On
Factory setting
Off
On/off switch for the function
Y1 The options depend on the
sensors connected
Select the sensors and the measured variables that
should be used as the minuend (Y1) or subtrahend (Y2).
Measured value
Y2
Measured value
Difference value Read only View this value in a user-defined measuring screen or
output the value via the current output.
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