ABB TZIDC-110 Operating Instruction page 40

40 TZIDC-110, TZIDC-120 DIGITAL POSITIONER | OI/TZIDC-110/TZIDC-120-EN REV. H
... 6 Installation
... Mechanical mounting
Mounting on a cast iron yoke
Figure 11: Mounting on a cast iron yoke
1. Fasten the mount bracket
to the cast iron yoke 1
Mounting on a columnar yoke
Figure 12: Mounting on a columnar yoke
1. Hold the mount bracket
columnar yoke 2 .
2. Insert the U-bolts from the inside of the columnar yoke
1
through the holes of the mount bracket.
3. Apply washers 4 and nuts
4. Tighten the nuts so that they are hand-tight.
2 with screw 4 and washer
.
3 in the suited position on the
.
5
Note
Adjust the height of the positioner on the cast iron yoke or
columnar yoke until the lever is horizontal (based on a visual
check) at half stroke of the valve.
3
1 Increase linkage
Figure 13: 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
sensor. Moving the link point outwards reduces the rotation
angle of the 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:
40°
Minimum angle:
25°
Note
2
After mounting, check whether the positioner is operating within
the measuring range.
2 Decrease linkage