Technical Specifications

233
Custom Characterization
Configure
Custom Characterization
When mounted on a reciprocating valve, a small non linearity in the reported valve position
versus actual valve position may result from the linkage configuration. This non linearity can
be corrected using a custom characterization that matches the specific linkage used.
Custom characterization must be the selected configuration option to use the generated
curve. Custom characterization is accomplished using the Figure 35 dialog.
Figure 35 Custom Characterization
Input Signal (%)/Position
(%)
Activated by selecting Custom in Characterization.
A custom characterization defines the relationship between the input signal and the output
position of the valve. The characterization may contain up to nine XY pairs and the position
is linearly interpolated between the pairs. The first position is always 0, 0 and the last
position is always 100,100. Both first and last positions indicate 0 and 100 percent and are
not counted as any of the nine points allowed.