Operation
Liquiline System CA80AM
132
Hauser
10.7.4 Mathematical functions
In addition to "true" process values provided by connected physical sensors or analog inputs, you
can have maximum 6 "virtual" process values calculated using mathematical functions.
The "virtual" process values can be:
• issued via a current output or fieldbus
• used as a control variable
• assigned as a measured variable to a limit switch
• used as a measured variable to trigger cleaning
• displayed in user-defined measuring menus.
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 their measured variables that are
to 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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