User's Manual

National/Lancaster Meter Installation
TDC-0823-005 100G Datalogging Installation Guide - Direct Mount 50
Proprietary and Confidential
To attach the 100G Datalogging gas endpoint to the meter
1. Align the white wriggler (1) so one of its four drive slots lines up with the meter's drive dog (2).
2. Carefully place the 100G Datalogging gas endpoint on the meter.
Warning Failure to correctly align the meter drive post and endpoint drive slot
can cause binding and lead to poor registration or meter failure. If there is a
gap between the endpoint gasket and the meter, it may be the drive slot of the
endpoint assembly's wriggler is not correctly aligned with the meter drive slot.
Remove the 100G Datalogging gas endpoint assembly and repeat the
alignment procedure. You must engage endpoint wriggler in the meter drive
dog.
3. Install endpoint to meter mounting screws in an alternating fashion. 100G Datalogging gas endpoints for
National/Lancaster meters come with new, different-size endpoint mounting screws (SCR-0014-004 - see
Installation Prerequisites on page 7 for screw information.) Insert the right index cover mounting screw
and tighten the screw enough to hold it in place. Do not completely tighten. Install the left index cover
mounting screw and tighten to a snug fit. Finish by tightening the right mounting screw to a snug fit.
Tighten each endpoint mounting screw evenly.
Important Meter manufacturers should torque the mounting screws 15 to 20 inch-pounds.
4. Place new tamper seals over the screws. Press the new tamper seals into place using the 11/32-inch nut
driver or similar blunt tool.