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4. Widen the Proportional Band until only slightly unstable. This is the
Proportional Band’s Ultimate Sensitivity. The Proportional Band’s
Ultimate Sensitivity width will be defined as “P” when calculating
the actual Proportional Band.
5. Use the following coefficients in determining the correct PID settings
for your particular application.
Time
Constant
Time
PV
Control
P
I
D
Action
Setting
Setting
Setting
P Only
2P
*
*
PI
2.2P
.83T
*
PID
1.67P
.5T
.125T