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Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
F. 31 (0) 10 521 19 41
E-mail: [email protected]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
Bank account no.: Rabobank 16 01 00 046
Chamber of commerce 27 16 95 41
IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
7.3
Manual tuning
The temperature control of the bath is based on a digital
PID system. When using different fluids in the bath each
with their own heat capacity, the use of external cooling
and external connected processes(circulation), or
working at different set point temperatures requires new
settings of the PID parameters. These parameters have
to be optimised after changes to the system when
optimal and accurate temperature control of the bath
liquid is required.
Tuning of the bath results in:
•
Stable temperature control of the bath,
•
No over- or undershoot of the temperature set point,
•
Quick response to deviations from the set point caused
by external disturbances.
Tuning can be done automatically or manually.
Parameter
Description
Display
Proportional band
The bandwidth in display-units over which the output power is
proportional between minimum and maximum
Prop
Integration time
Determines the time taken by the controller to remove steady state error
signals
Integ
Derivative time
Determines the time taken by the controller to react on error signals.
Diff
Table 1 Parameters influencing the temperature control