User's Manual

National (Lancaster) Meter Installation
4. Remove the screw completely after the index is free of the meter.
5. Set the index aside where it will not be damaged or fill with dirt, rain, or snow. You will mount the index
in the ERT module later in this procedure.
6. Discard the index mounting screws. The 100G for National (Lancaster) meters includes new, different-
sized index mounting screws (see Installation Prerequisites on page 14 for screw information).
7. Remove the old gasket, gasket residue, and dirt from the meter (if applicable). The meter face must be free
of gasket residue or dirt before you install the 100G assembly.
Assembling the Gas ERT Module and Index
Continue ERT module installation by assembling the ERT module and index.
To assemble the 100G series gas ERT module and index
1. Separate the 100G housing from the cover by pulling the cover straight out from the housing.
TDC-0823-014 100G Series Gas ERT Module Installation Guide, Direct Mount 50
Proprietary and Confidential