Process Unit 73 LF - Knick

Trilinear Output Curve
output current [%]
100
80
60
40
20
0
0 20 40 60 80 100
conductivity [mS/cm]
To determine the span corresponding to a current
range of 0 (4) to 20 mA, set an initial and an end
value for the process variable.
In addition, you can define two corner points. They
divide the output curve into three regions of different
slopes.
Example:
beginning:
0 mS
1st corner X: 20 mS/cm
1st corner Y: 40 %
2nd corner X: 80 mS/cm
2nd corner Y: 60 %
end:
100 mS
Bilinear Output Curve
output current [%]
100
80
60
40
20
0
0 20 40 60 80 100
conductivity [mS/cm]
To define a bilinear output curve, set the same X
and Y values for the two corner points of a trilinear
curve.
To determine the span corresponding to current
range 0 (4) to 20 mA, set an initial and an end value
for the process variable.
In addition, you can define a corner point. It divides
the output curve into two regions of different
slopes.
Example:
beginning:
0 mS
1st corner X: 20 mS/cm
1st corner Y: 40 %
2nd corner X: 20 mS/cm
2nd corner Y: 40 %
end:
100 mS
Capabilities 9–19