Technical Specifications

101
Custom Characterization Dialog
Configuration Services
Custom Linearization
Select the Custom Linearization menu item in the Characterization dialog box and the
Custom Linearization dialog box appears (Figure 85).
When an FVP is mounted on a reciprocating valve, a small non-linearity in the valve
position measured by the FVP position sensor versus actual valve position can result
from the linkage configuration. This non-linearity can often be insignificant in a closed
loop system and has the least effect on the closed loop performance.
Custom linearization cannot be used in combination with the equal percentage or quick
opening characteristics. If a non-linearity correction and equal percentage or quick
opening characteristics are both required, use the nonlinearity correction in the Travel
Calibration dialog box and adjust the 50% point.
Figure 85 Custom Linearization Dialog Box
A custom linearization method built into ValVueFF can be used to correct this
non-linearity. The method automatically generates a custom characterization that
matches the specific linkage used.
CAUTION Custom Linearization uses the same data as Custom
Characterization. Only one of these configuration options
can be used at one time. Custom Characterization data is
discarded if Custom Linearization is used.