122
Proportional action YP
Setpoint - Meas. value
Measuring range
YP =
*
Controller output Y =
I action
with:
YP
Proportional
action
TN
Reset
time
[s]
TD
Rate
time
[s]
KC
Controller
gain
[%]
D action
dYP
dt
1
TR
P action
Controller Equations
YP +
YPdt
+ TD
KC
PID Controller
Neutral Zone (Y=0)
Tolerated deviation from setpoint.
With the setting “1 mS/cm”, for example, a deviation of ± 0.5 mS/cm from the setpoint does not
activate the controller.
100 %
50 %
Xw
Con
tr
oller
output
Y
KC = 500 %
KC = 200 %
KC = 100 %
KC = 50 %
Proportional Action (Gradient K
C
[%])
Deviation
Process variables: Cond, Conc, SAL
MR*0.2
MR*0.4
MR*0.6
MR*0.8
Measuring
range (MR)
Summary of Contents for Stratos Evo A402
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