Operating Information; Valve Positioner Cam Information - Emerson Fisher 3582i Instruction Manual

3582, 582i, and 3583
January 2013
When the positioner is correctly attached to the mounting plate, proceed with the installation by taking the control
valve/actuator/positioner package out of service.
2. Properly vent the actuator loading pressure and the supply pressure. Disconnect the pressure tubing connections to
the valve positioner.
3. Remove the two screws (key 105 in figures 24 or 25) holding the bypass block (key 34A in figures 24 or 25) to the
valve positioner case and remove the bypass block. Save the screws to reattach the 582i converter.
4. Remove and discard the existing gasket (key 104 in figures 24 or 25) between the bypass block and valve positioner
case.
5. Unpack the 582i converter to be installed.
6. Position the new gasket on the 582i converter as shown in figure 26. Insert the existing screws (key 105 in
figures 24 or 25) through the appropriate holes in the 582i converter housing and new gasket.
7. Mate the converter and new gasket to the side of the valve positioner case using the alignment pins on the
converter housing.
8. Tighten the screws.
9. Reconnect the pressure connections according to the instructions given in the pressure connections section of this
manual.
10. Make the electrical connections according to the instructions given in the electrical connections section of this
manual.
11. Complete the standard calibration procedure described in the calibration section of this manual.
12. Return the control valve package to service.

Operating Information

Instructions for setting the zero and span are found in the calibration section.

Valve Positioner Cam Information

Note
The small arrow on the valve positioner cam must point in the direction of stem movement with increasing actuator diaphragm
pressure. If the arrow is pointing in the wrong direction, remove, reverse, and re‐install the cam. Refer to the Changing Cam
Position section of this manual.
Refer to figure 21 for key number locations. Unhook the spring (key 38), and remove the cam bolt and locking nut
(keys 6 and 45). Remove the cam (key 4) and spring retainer bracket (key 43). To install the cam, screw the locking nut
all the way onto the cam bolt. Attach the cam and spring retainer bracket with the cam bolt. Tighten the bolt to secure
the cam. Then, tighten the locking nut against the spring retainer bracket. Hook the spring into the spring retainer
bracket.
When shipped from the factory, 3582 valve positioners and the 3582i valve positioner have a linear cam, Cam A,
installed in the operating position. Two characterized cams, Cams B and C, are available. These characterized cams
may be used to modify the valve flow characteristics.
Figure 12 shows resultant stem travel due to an incremental instrument pressure change for each cam. In figure 12,
the curves are based on 60 degrees cam rotation for 100 percent stem travel. At 50 percent of the input signal span,
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Instruction Manual
D200138X012