Proximity Switches

Instructions for setting proximity switches in a rotary enclosure to trip at the proper positions

Instructions to adjust

Follow the instructions below properly setting the cams on the shaft assembly. Be sure to heed all cautions and warnings.

Warning

WARNING: To prevent the possibility of personal injury or property damage, turn off electrical power before inspection, adjustment, or removal of the valve position transmitterCAUTION: Keep clear of all moving components.

Note

To properly set switches, an ohm meter or equivalent devices will be required.

Setting the Switches

1. Remove VPT cover from the housing by loosening the screws holding the housing and cover assembly together.
   
2. 
   Move the valve or valve actuator assembly to a position where one or more of the switches will be required to operate noting the direction of VPT shaft rotation.
   
3. Determine which switch is to be set and lift or depress the corresponding cam as required. Using the arrow only as a guide, rotate the cam in the direction of shaft rotation until the circle on the cam and the arrow on the switch are aligned with
   each other. IMPORTANT – To be sure the normally open contact is now closed, you must use an ohm meter or equivalent device to check the setting.
4. Repeat Steps 2 and 3 until all of the switches are set
   

Re-assembly

1. Replace the VPT cover and tighten the screws. To ensure that the shaft alignment is secured, bring all of the screws in contact with the cover and then tighten them in stages moving from one screw to its diagonal counterpart.