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Auto Find Stops
The process 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. To perform auto find stops:
1. Set the air action (0-7 for ATO or 8-F for ATC).
2. Press auto find stops button until green LED 1 illuminates, then release
(approximately 2 seconds to turn on and release before 7 seconds). The unit goes
into a Commission Process and green LED 1 blinks until the process completes.
The auto find stops process occurs. When the process is complete, the unit
automatically returns to Normal mode.
Press Cancel to abort the process and the green LED 1 goes off, the device returns
to Normal mode and no changes occur.
Open Stops Adjustments
In some valves the stem travel exceeds the nominal valve travel. The SVi1000 allows you to com-
pensate for this so that the valve position reads 100% at the nominal travel. The acceptable
range is between 60%-100% of possible mechanical travel.
To perform open stops adjustments:
1. Press the upper stop adjustment button for two to seven seconds, until green LED
2 illuminates, then release. Green LED 2 flashes.
2. Move the valve to the desired location via the Open Stop Adjustment Screw
(Figure 21).
Upper Stop
Button and
LED 2
Open Stop
Adjustment
Screw
Cancel
Button and
LED 4
3. Press the upper stop adjustment button for more than two seconds.
The green light goes off, the new stop is saved in the device and the unit is put into
Normal mode.
Press Cancel to abort the process and the green LED 1 goes off, the device returns
to Normal mode and no changes occur.
© 2016 General Electric Company. All rights reserved
Figure 21 Open Stop Adjustment Screw
.
Masoneilan SVi1000 Positioner Quick Start Guide =| 45
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