Koehler K87170, Operation And Instruction Manual

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“Hidden” Parameters
There are some parameters that rarely need adjustment. These are normally
“hidden” from view to avoid clutter and confusion. To view or edit the parameters,
click the Show Tunig Parameters button. Then these parameters will be visible.
There are 3 sets of PID control parameters for the automatic vacuum
control. The first set is for pressures above 10 mmHg, the second for
1-10 mmHg and the third for pressures below 1 mmHg.
a. Vacuum KP: This is the proportional control constant for the vacuum
control. The default value is normally adequate and should not need to
be changed. If you are having problems with vacuum control contact
your local representative for advice.
b. Vacuum KI: This is the integral control constant for the vacuum
control. The default value is normally adequate and should not need to
be changed. If you are having problems with vacuum control contact
your local representative for advice.
c. Distillation Rate KP: This is the proportional control constant for the
distillation rate control. Normally this value does not need to be
changed. If you are having problems with distillation rate control
contact your local representative for advice.
d. Distillation Rate KI : This is the integral control constant for the
distillation rate control. Normally this value does not need to be
changed. If you are having problems with distillation rate control
contact your local representative for advice.
e. Distillation Rate KD: This is the differential control constant for the
distillation rate control. Normally this value does not need to be
Operating the Microprocessor Controller 4-7