Flowserve PM15E Electro-Pneumatic Valve Positioner - Manual (Page 5)

6. SPAN AND ZERO ADJUSTMENT
Span is adjusted with the brass-colored (upper) thumb wheel (1)
located on the feedback spring.
To adjust the span, always return to minimum input signal first, then
loosen the locking screw (2) and turn thumb wheel (1). Tighten screw
(2) when span is set. Do not allow the top of the spring to contact the
spring guide (3).
Always check zero after adjusting span.
Zero is adjusted by turning the silver (lower) thumb wheel (4) located
on the lower arm (5), or externally with a screwdriver (7) through the
zero adjustment opening. Remember to install cover (6) to ensure the
unit seals.
7. INDICATOR ADJUSTMENT
To adjust the indicator, take off front cover and pull the indicator
upwards until it comes off the Allen screw.
Before installing the indicator make sure that the Allen screw is
tightened. Press the indicator on the screw and adjust it by rotating
clockwise to desired position.
8. CAM ADJUSTMENT
With the cover and indicator removed, loosen the screw (1) and turn
the cam locking nut (2) counterclockwise until the cam loosens.
Adjust the cam (3) as desired, making sure that the ball bearing (4) is
always riding on an active lobe on the cam. To secure the cam, make
sure that screw (1) is backed out from the locking nut (2), then finger-
tighten the locking nut and tighten screw (1). Install and adjust the
indicator and reinstall cover.
Flow Control Division
Worcester Controls
WCAIM2017 Model PM15E Electro-Pneumatic Valve Positioner 5
1
2
1
3
1 5 4 3
2
4
5
3
4
1-2 mm (
1 /
16
")
1
2
6
7
Correct
Incorrect