Watlow Controls 8LS, User Manual

Page: 89 / 140

Tuning and Control
8LS User’s Guide 81
Integral Term (TI) Settings
This table shows TI settings vs. Reset settings.
As a general rule, use 60, 120, 180, or 240 as a starting value for the TI.
Derivative Term (TD) Settings
This table shows Derivative term (TD) versus Rate Minutes (RM);
Rate=TD/60.
As a general rule, set the TD to 15% of TI as a starting value.
TI
(secs./repeat)
Reset
(repeats/min)
TI
(secs./repeat)
Reset
(repeats/min)
30 2.0 210 0.28
45 1.3 240 .25
60 1.0 270 .22
90 .66 300 .20
120 .50 400 .15
150 .40 500 .12
180 .33 600 .10
TD
(secs./repeat)
Rate
(repeats/min)
TD
(secs./repeat)
Rate
(repeats/min)
5 .08 35 .58
10 .16 40 .66
15 .25 45 .75
20 .33 50 .83
25 .41 55 .91
30 .50 60 1.0