DeZurik PMV P36C Manual - Page 9

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Cam Adjustment

1. With the cover and indicator removed, loosen the screw (1) and turn the cam locking nut (2)

counterclockwise until the cam loosens. See Figure 5.

2. Adjust the cam (3) as desired, making sure the ball bearing (4) is always riding on an active lobe

on the cam.

3. Finger tighten the locking nut and tighten the screw (1).

Note: Ensure screw (1) is loose from the cam before tightening locking nut (2).

4. Install and adjust the indicator, and install cover.

Zero and Span Adjustment

Span Adjustment

Span is adjusted with the yellow (upper) thumb wheel (1)

located on the feedback spring. See Figure 6. To adjust

the span, loosen the locking screw (2) and turn the yellow

thumb wheel. Do not allow the top of the spring to contact

the spring guide (3). When span is set, tighten the locking

screw. Always check Zero after adjusting Span.

Zero is adjusted by turning the silver (lower) thumb wheel

(4) located on the lower arm (5). It can also be adjusted

externally with a screwdriver (7), through the zero adjust

opening. Remember to re-install the zero adjust cover (6)

to keep the unit clean.

August 2012

PMV P36C and P41C Positioners

used with DeZURIK Pneumatic Actuators

Figure 5 – Cam Adjustment

Page 9

Figure 6 – Zero and Span Adjustment

DeZURIK

D10327