User's Manual

CHAPTER 2 AUTOMATED METER READING OVERVIEW
VRT Gas Transponder ― User Guide Page 3
AMCO Automated Systems • P/N 52870T010 Rev 1 May 2003
Chapter Two
Chapter TwoChapter Two
Chapter Two
Automated Meter Reading Overview
The TRACE system uses radio frequency (RF) signals to allow
utility personnel to read meters from a distance while the reader is in
motion. This technology is called automated meter reading (AMR).
This technology greatly increases the speed at which routes can be
covered with a high degree of accuracy.
Basic AMR Components
An automated meter reading system requires the following basic
components:
 Transponder—The VRT Gas Transponder interfaces with the
meter index drive, counts the number of drive dial (proving dial)
rotations, receives commands from an interrogator and
transmits the index reading and other meter data.
 Interrogator—At its simplest, the interrogator remotely reads
meter data transmitted by transponders. At more sophisticated
levels an interrogator may also program transponders, store
route data and verify transponder conditions and data, among
other functions.
 Antennas—Both the transponder and the interrogator use
antennas to broadcast and receive RF signals. The
transponder’s antenna is typically located on the circuit board
inside the transponder housing. Some interrogators use
external antennas (as shown in the illustration below), one for
transmitting and one for receiving. Many handheld interrogators
use a single antenna for both transmitting and receiving
(antenna may be internal or external).
The interrogator sends out an RF signal to the desired transponders. Upon receiving an authorized
command the transponder transmits its stored meter data.
Transponder
METER
S/N 6501237
234 Maple Drive
Interrogator
Interrogator transmits commands
& queries to transponder(s)
Transponder transmits
the index reading and
other meter data to the
interrogator’s receiver