User's Manual

This chapter provides instructions to install the 100G ERT module on 175 - 250 CFH National (Lancaster)
meters.
Removing the Meter Index
Begin the module installation by removing the index cover and index from the meter.
To remove the index from the meter
1. Remove any tamper seals from the index cover screws. Remove the index cover screws and the index
cover from the meter. Discard the index cover mounting screws and index cover. The 100G includes new,
different-size ERT module mounting screws
Note You may use the removed index cover as a temporary storage container for screws. Properly
dispose all unused screws, old index covers, gaskets, tamper seals, and other leftover materials. Do not
leave materials on customer premises.
2. Remove one index mounting screw completely. Hold one hand under the index to catch the screw.
3. While you remove the other mounting screw, pull the index away from the meter to keep the index
backplate against the back of the screw.
C HAPTER 5
N
ational (Lancaster) Meter Installation
TDC-0823-014 100G Series Gas ERT Module Installation Guide, Direct Mount 49
Proprietary and Confidential

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