Flowserve ValveSight Diagnostics - Manual (Page 49)

ValveSight Diagnostics for HART User Manual FCD VSENSF0001-02-AQ 03/15
49 flowserve.com
Soft Limit Settings
The “Soft Limit Settings” box has two fields for setting the soft limits. The Low Setpoint field is the value below which the
positioner stops following the command signal and holds the position at the specified limit. The High Setpoint field is the
value above which the positioner stops following the command signal and holds the position at the specified limit.
Data Management
Select Apply to save the selections to the positioner. Retrieve can be used to view values currently stored in the positioner.
12.5 Stroke Characterization
The Characterization screen enables you to change the relationship between the command and the position of the valve.
This relationship is shown by the characterization curve. The characterization curve changes the command (or Input
Signal) into a corresponding Output Signal> The actual valve position corresponds to the Output Signal. Three types of
characterization curves are available: Linear, Equal Percent (=%), and Custom.
Linear Characterization Curve