Technical Specifications

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Find Stops
To determine valve position, the PST controller must measure and save the closed and open
positions of the valve. This can be done automatically by running Find Stops procedure from
the Calibrate screen.
The SVI II ESD first exhausts the actuator and measures the position, then fills the actuator
and measures the position. From these measurements the valve position is determined.
Correction can be made for nominal valve travel if it is less than full travel. A progress screen
appears while the find stops process is running.
To start the Find Stops function:
1. Click Find Stops (Figure 131).
Figure 131 Starting Find Stops