User's Manual

APPENDIX
VRT Gas Transponder ― User Guide Page 37
AMCO Automated Systems • P/N 52870T010 Rev 1 May 2003
Appendix
VRT Direct Gas-meter Transponders can be programmed (at the
factory or in the field) with values specified by the utility.
This Appendix highlights some of the types of data that can be
programmed at the factory and the range of selections within each
type.
For comprehensive discussion of all programmable transponder
data, please refer to the applicable interrogator/programmer user
guide.
Pre-Divider
The number of subcounts recorded with each revolution of the drive
dial on 1-ft
3
and 2-ft
3
indexes is one. A 1-ft
3
index requires 100
revolutions to yield 100 ft
3
(1 count) and a 2-ft
3
index requires 50
revolutions to yield 100 ft
3
(1 count). Therefore, the pre-divider for a
1-ft
3
index is 100 and for a 2-ft
3
index it is 50.
Pressure-Compensation Factor
When a transponder is used in conjunction with a pressure-
compensated index, a pressure-compensation factor can be
programmed into the transponder memory by the utility at the time
of installation to ensure that the electronic index reading agrees with
the mechanical index.
Pressure-compensation factors are unique for specific indexes and
can be obtained by contacting AMCO Automated Systems’
Customer Service Department at [phone].
Time-of-Use (TOU) Registers
Time of use registers, if activated, accumulate consumption
recorded by the transponder between the start and stop time set for
each TOU register. Certain rules apply to the TOU values,
including:
• If activated, the TOU register must be active for a minimum of
00:29:59 (hh:mm:ss) and a maximum of 23:59:59 (hh:mm:ss).
• TOU registers can start on the hour or in 15-minute intervals
after the hour. For example: 12:00:00 PM and 12:15:00 PM are
valid start times, while 12:07:00 PM is not a valid time.
• TOU registers must also end at the end of the hour or in 15-
minute intervals thereafter. Thus, 01:59:59 PM and 02:14:59 are
valid stop time, while 02:13:59 is not.