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APPENDIX C - CAM CHARACTERIZATION ............................................................................. C-1
INTRODUCTION ............................................................................................................................ C-1
CAM CHARACTERIZATION .......................................................................................................... C-1
CAM SELECTION .......................................................................................................................... C-3
CAM SHAPING METHOD.............................................................................................................. C-5
No.
1-1.
Capacity Data of Type AV3/4 Positioners (Exhaust to Atmosphere) ........................................1-8
1-2.
Air Consumption Data of Type AV3/4 Positioners ....................................................................1-8
2-1.
Type AV3/4 Positioner Operation Diagram...............................................................................2-1
2-2.
Block Diagram of a Typical Control System Utilizing a Positioner............................................2-1
3-1.
External and Mounting Dimensions for the Type AV Positioner ...............................................3-3
3-2.
Typical Positioner Mounting Using Linkage .............................................................................3-4
3-3.
Typical Positioner Mounting Using Direct Coupling .................................................................3-4
3-4.
Drive Arm Connections ............................................................................................................3-5
3-5.
Positioning Cam .......................................................................................................................3-6
3-6.
Cam Roller Alignment ..............................................................................................................3-7
3-7.
Type AV Positioner Port Locations ...........................................................................................3-9
3-8.
Tubing Examples of Single-Acting Actuators .........................................................................3-10
3-9.
Tubing Example of a Double-Acting Actuator ........................................................................ 3-11
3-10.
Type AV Positioner Wiring Connections................................................................................. 3-11
4-1.
Type AV Calibration Adjustment Locations ..............................................................................4-2
4-2.
Cam Roller Alignment ..............................................................................................................4-3
4-3.
Type AV4 Positioner Motor Speed Adjustments.......................................................................4-6
4-4.
Zero Adjustment Graph............................................................................................................4-7
4-5.
Span Adjustment Graph ...........................................................................................................4-8
4-6.
Pilot Valve Measurement for Maximum Speed.......................................................................4-10
4-7.
Speed Adjustment Screw Locations....................................................................................... 4-11
4-8.
Type AV3 Positioner EMI/Electronics Housing.......................................................................4-13
4-9.
Servo Adjustments (AV4) .......................................................................................................4-15
8-1.
Type AV Positioner with Manifold .............................................................................................8-1
8-2.
Manifold without Filter Cover....................................................................................................8-2
8-3.
Manifold (Rear View) Showing O-Rings...................................................................................8-3
8-4.
Servo and EMI/Electronics Assembly ......................................................................................8-6
8-5.
Stroke Adjustment Screw Locations.......................................................................................8-10
8-6.
Pilot Valve Measurement for Maximum Speed.......................................................................8-10
9-1.
Type AV3 Positioner (Interior, Wiring, and Tubing Details).......................................................9-5
9-2.
Type AV3 Positioner (Exploded View)......................................................................................9-6
9-3.
Type AV3 Positioner (Front, Side and Inside of Cover)............................................................9-7
9-4.
Type AV4 Positioner (Interior, Wiring, and Tubing Details).......................................................9-9
9-5.
Type AV4 Positioner (Front, Side and Inside of Cover)..........................................................9-10
9-6.
Type AV4 Positioner (Exploded View).................................................................................... 9-11
A-1.
Terminal Block Connections TB1-1 through TB1-5 ................................................................. A-2
A-2.
Schematic for Potentiometric Position Transmitter Example ................................................. A-4
A-3.
Potentiometric Position Transmitter Assembly (Exploded View)............................................. A-5
A-4.
Location of Calibration Features for 4 to 20 mA Position Transmitter.................................... A-6
Table of Contents
Title
(continued)
Page
List of Figures
Page
iii
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