"Determine thermodynamics" menu
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2.13.2018
5.1.1. "Self-tune" menu
Select setting
During self-tuning, the controlled process's
parameters Xp, Tn, and Tv will be
automatically determined and stored.
Available parameters:
Off
- no self-tuning
The control parameters of the most recent identification are
stored and will be used for control purposes.
Once
- one-time self-tuning
The unit will perform a one-time identification of the controlled
process each time the unit is started with the
button or via
the start command through the interface.
Always
- continuous self-tuning
The circulator will identify the controlled process at each
setpoint jump.
Select this option only if the controlled system changes
continuously.
5.1.2. Bandlimit Selftune
During self-tuning, it is important to prevent the speed of the
temperature change in the rapid internal system (
) from
greatly exceeding the speed of the temperature change in the
slower external application.
A bandlimit during self-tuning ensures that temperature changes in
the unit (small mass) and in the application (usually larger masses)
proceed uniformly. This applies to the heat up and cool down
phases.
The maximum permissible temperature difference is defined with
the value >Bandlimit selftune<.
As long as >Bandlimit selftune< is engaged, the bandlimit will
be switched off during external control (see >Lower/upper
bandlimit<, page 29).
Set value
Example: 50 K
Setting range see display of unit.