Operation Liquistation CSF48
174 Endress+Hauser
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.
Redundancy
Use this function to monitor two or three sensors with redundant measurements. The
arithmetic average of the two closest measured values is calculated and output as the
redundancy value.
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.
Path: Menu/Setup/Additional functions/Mathematical functions/MF 1 to 6/Mode/Redundancy
Function Options Info
Calculation Options
•Off
•On
Factory setting
Off
On/off switch for the function
Y1 The options depend on the
sensors connected
You can select different types of sensor that output the
same measured value.
Example for temperature redundancy:
You have a pH sensor and an oxygen sensor at inputs 1
and 2. Select both as "Y1" and "Y2". For "Measured value"
select the temperature.
Measured value
Y2
Measured value
Y3 (optional)
Measured value
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