YSI IQ SensorNet DIQ/CR3 - Manual (Page 47)

MIQ/CR3; DIQ/CR3 Settings
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By activating or deactivating the Integral (ti) and Derivative (td)
controller part, the following controller types can be configured:
Characteristic curve of
the proportional
controller
For a P controller, the interrelationship between the measured value
and current I at the controller output forms the following characteristic
curve:
Fig. 4-18 Proportional controller (negative characteristic curve)
The proportional band Xp is limited by the measuring range of the
linked sensor. If a value is entered for the parameter Xp that is greater
than zero, the controller has a negative characteristic curve (example
Fig. 4-18). To obtain a positive characteristic curve, a negative value
must be entered for Xp .
Controller type td [s] ti [s]
P controller 0 0
PI controller 0 1 to 9999
PD controller 1 to 9999 0
PID controller 1 to 9999 1 to 9999
0
Imin
Imax
Current I [mA]
Measured value Nominal value
Io
Xp