User's Manual

Sensus Meter Installation
2. Place the index drive gear (1) in the shaft gear cup (2) of the ERT. The example shows an 11-tooth drive
gear. Your index may be a 16- or 18-tooth gear. Use the appropriate ERT module for your specific meter.
See the 100G Gas ERT Module Meter Compatibility List for more information.
Warning Indexes have varying drive mechanism styles. Failure to align the 100G DLS shaft with the
index drive post can cause binding and lead to poor registration or meter failure. To verify proper
engagement of the index to the 100G ERT module shaft, spin the wriggler one clockwise rotation, then
one-counterclockwise rotation. Do not spin the shaft more than one complete rotation. The shaft should
spin freely, with little or no resistance.
3. After the index drive gear is aligned and inserted into the shaft gear cup, the mounting holes will line up.
4. Using the original index mounting screw or a replacement screw (if necessary), place one 6 - 32 x 5/8-inch
screw into the index right mounting screw hole.
5. Attach the screw to the ERT housing right-index mounting post just enough to hold the screw and the
right end of the index in place.
6. Install and tighten the left index mounting screw.
7. Tighten the right index mounting screw completely. Install and tighten both index mounting screws
evenly.
TDC-0823-014 100G Series Gas ERT Module Installation Guide, Direct Mount 26
Proprietary and Confidential