Lauda Integral T 1200 Operating Instructions Manual page 75

Integral T process thermostats
 
21/01/2019 / YAWE 0026
It is essential to ensure that there is optimal thermal coupling between heat
transfer liquid and external sensing point. Otherwise satisfactory control can not
be achieved. Under unfavourable conditions, simple outflow temperature control
may give better results.

Select here the reset time TN for the outflow controller.
Input range 1 - 200 sec. 200 is followed by OFF, i.e.
the integral function of the controller is switched off,
the controller operates as a proportional controller with
permanent control offset. OFF is normally not used.
Suitable values are 20 - 100 sec.

Small values produce rapid control action but lead also
to instability. Values around 50 sec usually give
adequate results.

The controller output can be indicated here, e. g. for
use during servicing.
With external control (CON E) switched on:

Proportional band Xp for outflow controller. When
working with the external controller the outflow
controller operates as proportional controller in the
cascade circuit.

The criteria are similar to internal control.

Control gain of the master controller of the cascade.
Larger values produce a faster reaction and possibly
instability.

Suggested value KPE = 3.0.

Reset time TN of the master controller.
KPE and TN depend largely on the conditions, i.e.
volume, heat transfers, pump output and location of
external controller.

Suggested value for TN = 100 sec.
Starting up
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