User Manual

Table Of Contents
Chapter 9 - Sprague Mini Switch Kit Installation Landis+Gyr
58 98-1357 Rev AA Installation Guide
7. Verify that the pulse wheel rotates freely without rubbing the index surface. Rotate the wheel
several times as shown in the next figure to verify that the wheel does NOT contact adjacent
index pointers.
Figure 9 - 7. Pulse Wheel Must Not Contact Adjacent Pointers As It Rotates
A CAUTION: The installed pulse wheel shall not move from the installed position, and cannot
physically contact the index face or other pointers on the index.
If contact occurs, Landis+Gyr recommends replacing the metal pointer index with an index
using plastic pointers so that the Dual Set-Screw Balanced Pulse Wheel can be used.
If pulse wheel contact with the adjacent proving pointer tip is unavoidable, 1/4 of the
adjacent proving pointer tip may be removed with diagonal cutters, but only with permission
from the utility customer.
8. Install the index onto the meter using the original screws that were placed aside in the first step
of this process. If the index has a brass mounting bracket, tighten the index screws to a torque
value of 6 - 12 inch-pounds. If the index uses a plastic mounting bracket, tighten the index
screws to a torque value of 15 - 20 inch-pounds.
A CAUTION: Use caution when tightening the index screws to prevent damage to the index.
9. Confirm that the index’s center of rotation is aligned with the meter dog’s center of rotation.
Adjust the index alignment as needed. The magnet wheel center of rotation must be aligned
with the meter index drive mechanism center of rotation, shown by RED ARROWS in the
following photos.
Figure 9 - 8. Wheel Center Of Rotation Must Align With Meter Drive Center Of Rotation