Technical Specifications

105
8
Calibration Services
Overview
Calibration Services provides tools to set valve stroke and tune the dynamic parameters for
position control. Each set of tools is grouped on a tab in the Calibration dialog box.
Range Tab
To calibrate the position sensor to match the actual valve travel:
1. Use the Auto Stop Limits ( “Auto Stop Limits” on page 106) or the Manual Stop Limits (
“Manual Stop Limits” on page 107) function to search for the mechanical stop limits of
the valve (Figure 87).
2. Use the Open Stop Adjust function ( “Open Stop Adjustment” on page 108) to correct for
over travel of the valve.
3. Check the calibration is done properly by:
a. Moving the valve from the fully closed to the fully open position using the IVI in
manual operating state.
b. Make a record of the valve's Actual Position indication at each stop. It is also useful
to record the Actual Position when the valve's mechanical position indicator reads
50%.