JULABO Magnum 91 Temperature System - Manual (Page 43)

Temperature System Magnum 91
43
8.2. Control parameters
Configuration
>Control param.
Profile Start
Int.Programmer
Inputs/Outputs
Limits
Interface
Temp.Sensor
Control param.
>Xp = 2.5 K
Tn = 220 s
Tv = 1 S
Xp =
When performing an identification for the controlled system (temperature
applications system) (see page 40), the control parameters Xp, Tn, Tv and
Xpu will be automatically determined and stored.
Each parameter may be manually set via the keypad if necessary, to allow
optimum control performance.
 Press enter to select the submenu "control parameters".
 Use the up/down cursor keys to select the desired option. A
flashing segment indicates that a new value needs to be entered.
 Use the numerals to set the value and then set with enter
(example: Xp = 2.5 °C).
 or at >DynInt<
Press the P-key to select the parameter and press enter
.
 Press escape
ESC
to return to the previous menu level.
Proportional range >Xp<
The proportional range is the range below the selected temperature value
in wich the the control circuit reduces the heating power from 100 % to 0
%.
Resetting time >Tn< (Integral component)
Compensation of the remaining control deviation due to proportional
regulation. An insufficient resetting time may cause instabilities to occur.
Excessive resetting time will unnecessarily prolong compensation of the
control difference.
Lead time >Tv< (Differential component)
The differential component reduces the control settling time. An
insufficient lead time will prolong the time required to compensate for
disturbance effects and cause high overshooting during run-up. An
excessive lead time could cause instabilities (oscillations) to occur.
Proportional range >Xpu<
The proportional range Xpu of the cascaded controller is only needed for
external control.