User's Manual

Sensus Meter Installation
Attaching the 100G Gas ERT Module Assembly to the Sensus
Meter
After 100G series gas ERT module programming is complete, attach the ERT module assembly to the Sensus
meter.
To attach the ERT module assembly to the meter
1. Place the ERT assembly against the front of the meter at angle.
Warning Failure to correctly align the meter drive gears and ERT module drive gears can cause binding
and lead to poor registration or meter failure. If there is a gap between the ERT module gasket and the
meter, it may be the drive gears of the ERT module assembly's wriggler are not correctly aligned with the
meter drive gears. Remove the 100G assembly and repeat the alignment procedure. You must engage
ERT module wriggler with the meter drive gears.
2. Install and tighten the ERT-to-meter mounting screws in an alternating pattern. Use the original mounting
screws if they were the correct size and not corroded. If you discarded the original screws, use the correct
replacement screws (see Installation Prerequisites on page 14).
Caution As the ERT module assembly is secured into its final position on the meter, shifting may occur
due to existing tolerances within the mounting screw holes. To ensure full ERT wriggler gear to meter
gear engagement, push the ERT module to the right while tightening the screws in the following pattern.
• Align the top right mounting screw hole on the meter with the top right screw hole on the ERT
module.
• Insert the top right cover mounting screw and tighten the screw enough to hold the ERT module
assembly in place. Do not completely tighten the screw.
• Rotate the ERT module assembly counterclockwise until the remaining three ERT screw holes line up
with the holes in the meter.
TDC-0823-014 100G Series Gas ERT Module Installation Guide, Direct Mount 29
Proprietary and Confidential