Hach-Lange SI794 C User Manual - Manual (Page 84)

84
Setpoint
Controller
output Y
p
[%]
+100 %
-100 %
mS/cm
Neutral zone Y
p
= 0
P controller
Application in integrating systems
(e.g. closed tank, batch processes).
PI controller
Application in non-integrating systems
(e.g. drains).
PID controller
The additional derivative action compensates for
measurement peaks.
Controller characteristic
Controller functions
PID controller