Limit Switch Adjustment - Emerson Bettis SMART EHO G Series Service Instructions Manual

Section 4: Set-up/Start-up Procedure
September 2020
4.8

Limit Switch Adjustment

4.8.1
4.8.2
Figure 18
WARNING
!
If the actuator is being installed in a hazardous area, use extreme care. This procedure
requires the limit switch cover to be open while electrical power is connected to the unit.
Follow these steps only when the atmosphere is free of explosive gases.
4.8.3
32
To complete limit switch adjustment, the actuator will need to be stroked from
a fully closed position to a fully open position etc. several times. In the following
instructions, the electric motor is used to Power Stroke the actuator. If it is not safe
or possible to use the electric motor at this time, use the Hand pump to Power
Stroke the actuator.
The limit switch adjustments are found in a covered compartment in line with the
valve stem and on the opposite side of the control box. Remove the limit switch
compartment cover by loosening the four corner bolts retaining it. All covers have
tapped holes for jackscrews to aid in removing the cover. Use the retaining screws
in these holes to lift the cover evenly at each corner. Use caution to not allow the
cover to bind during removal.
Remove Cover for Limit Switch Chamber
Close Limit Switch Adjustment
4.8.3.1 The Open and Close Limit Switches, shown in Figure 20, are operated
by targets mounted in a plastic disk that rotates with the actuator
stroke. To adjust a Target, push down on it and slide it in a clockwise or
counterclockwise direction.
Service Instructions
MAN-02-08-77-0714-EN Rev. 2
Set-up/Start-up Procedure