© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Masoneilan SVI FF Instruction Manual
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Appendix H. Notes on Characterization
Valve Over/Under Reaction Near Endpoints
This section is intended to explain why at times the valve can appear to be either over-reacting
or under-reacting to the user-based configuration.
A principle point to understand is the difference between the
travel
domain and the
user
domain:
The
travel
domain is what is actually happening to the valve - the amount of movement
during operation. This reflects the state of the
working setpoint
.
The
user
domain is reflected in the output seen on the LCD, through a DTM or other
interface. This reflects the value of the
FINAL_VALUE
parameter.
How do these two relate to each other:
FINAL_VALUE
--> Characterization process --> Working Setpoint
Whichever user-selected characterization process occurs (based on valve type), dictates the
behavior that are seen during valve operation. Figure 64 shows the characterizations curves.
Figure 64 Characterization Curves
Содержание Baker Hughes Masoneilan SVI FF
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