Publication 1763-RM001C-EN-P - October 2009
Process Control Instruction
307
2.
Enter the REM RUN mode and verify that PV=0.
3.
Type:
20
in CO%
4.
Record the PV = _______
5.
Type:
40
in CO%.
6.
Record the PV = _______
7.
Type:
60
in CO%.
8.
Record the PV = _______
9.
Type:
80
in CO%.
10.
Record the PV = _______
11.
The values you recorded should be offset from CO% by the same
amount. This proves the linearity of your process. The following
example shows an offset progression of fifteen.
–
CO 20% = PV 35%
–
CO 40% = PV 55%
–
CO 60% = PV 75%
–
CO 80% = PV 95%
If the values you recorded are not offset by the same amount:
•
Either your scaling is incorrect, or
•
the process is not linear, or
•
your equipment is not properly connected and/or configured.
Make the necessary corrections and repeat steps 2-10.
Determining the Initial Loop Update Time
To determine the approximate loop update time that should be used for
your process, perform the following:
1.
Place the normal application values in MinS and MaxS.
2.
Type:
50
in CO%.
3.
Type:
60
in CO% and immediately start your stopwatch.
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