Sabio 2010D, Operation Manual

Page: 167 / 182

Internal UV Ozone Photometer Page 9-17
Figure 9-8 Photometer Parameters, Page 3 of 3
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CAUTION
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Making changes to these parameters could
cause
the ozone generator to operate
improperly or even to oscillate wildly when
the ozone servo mode is selected. Be sure to
record the original factory settings before
attempting changes.
Following are brief descriptions of the PID Servo Loop Constants:
Proportional Term Constant
The Proportional constant is multiplied
by the proportional term of the PID
equation. This term is the difference,
or error, between the current measured
value and the desired setpoint. The
Proportional constant will normally be
less than 1 for Photometer servo
control.
Integral Term Constant
The Integral constant is multiplied by
the integral term of the PID equation.
This term represents the integral or
accumulated sum of all the errors since
the PID loop was activated. This
constant will also normally be less than
1 for photometer servo control.