OMNI 4000/7000 Operations and Maintenance Guide
– Rev F
6-30
Front Panel Operations
3.
a. Press
OK
to open the field for editing.
b. Make a known percentage step
change of output.
c. Press
OK
again to save the entry.
For example, from 20% to 22% equals a
10% change.
Note the percentage change of each process variable:
•
Primary Gain Estimate = 0.75 (Primary Loop Gain)
•
Secondary Gain = 0.75 (Secondary Loop Gain Estimate)
For example, 100 m
3
/hr to 110 m
3
/hr equals a 10% change in flow rate.
Estimate PID Repeats and Minutes
To estimate the repeats and minutes and fine-tune the gain, follow these instructions:
1.
a. In the
PID Control
screen, use the
arrow navigation keys to scroll down
and highlight
Pri Rpts/Min
.
b. Press
OK
.
c. Enter 40 as the new primary variable.
d. Press
OK
to save your changes.
2.
a. Scroll down and highlight
Sec Rpts/Min
.
b. Press
OK
.
c. Enter 40 as the new
secondary variable.
d. Press
OK
again to save the entry.
3.
Press the
Override
function key on the
bottom left to enter the
Manual Override
screen.
4.
Adjust the setpoints so that only the
primary variable is in control.
Go back to PID Control Tuning in Section
6.6.6 for instructions. When finished,
continue to Step 5.
5.
Press the
Return
button to go back to the
PID Control
screen.
Содержание 4000 Series
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