ABB PositionMaster EDP300 Operating Instruction page 20

20 PositionMaster EDP300 DIGITAL POSITIONER | OI/EDP300-EN REV. D
... 7 Installation
... Mechanical mounting
1 Increase linkage
Figure 11: Positioner linkage
The scale on the lever indicates the link points for the various
stroke ranges of the valve.
Move the bolt with the follower pin in the oblong hole of the
lever to adjust the stroke range of the valve to the working range
for the position sensor.
Moving the link point inwards increases the rotation angle of the
position sensor. Moving the link point outwards reduces the
rotation angle of the position sensor.
Adjust the actuator stroke to make use of as large an angle of
rotation as possible (symmetrical around the center position) on
the position sensor.
Recommended range for linear actuators:
30° to 30°; minimum range: 25°
Note
After mounting, check whether the positioner is operating within
the sensor range.
1 2
M10420-02
2 Decrease linkage
Position of actuator bolt
The actuator bolt for moving the potentiometer lever can be
mounted permanently on the lever itself or on the valve stem.
Depending on the mounting method, when the valve moves the
actuator bolt performs either a circular or a linear movement
with reference to the center of rotation of the potentiometer
lever. Select the chosen bolt position in the HMI menu in order to
ensure optimum linearization. The default setting is as follows:
1
5
1 Potentiometer lever
2 Actuator bolts
3 Valve stem
Figure 12: Actuator bolts on the lever (rear view)
1
5
1 Potentiometer lever
2 Actuator bolts
3 Valve stem
Figure 13: Actuator bolts on the valve (rear view)
2 3
4
M11031
4 Valve yoke
5 Positioner
2 3
4
M11032
4 Valve yoke
5 Positioner