Initial operation
58
7.9.3 Adjusting actual value limits
The actual value limits “internal minimum” and “internal maximum” are
effective in the external control operating mode. They define limits for the
expected temperature in the internal bath. The temperature controller cannot
exceed these limit values. Under certain circumstances, the external setpoint will
not be reached.
The device is switched on.
1. Bring up the
<Main menu>
.
2. From the
<Thermodynamics>
submenu, select the menu option
<Adjust
controller>
.
The dialog box for setting the controller appears on the display.
3. Switch to the submenu
<Limits>
.
4. Set the values for internal minimum and internal maximum in the dialog
window displayed.
The actual value limits are set and immediately active.
7.9.4 Band limit for external control
If an external system is being controlled then there is a temperature difference
both during the heating phase and the cooling phase due to inertia. The curve
illustrates the connection between the internal and external temperature
sequence.
Schematic temperature sequence internal/external
[1] Temperature sequence internal
[2] Temperature sequence external system
[3] Band limit upper
[4] Band limit lower
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