Elster Solutions URF01 URFI User Manual

Elster Solutions, LLC URFI

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User Manual

UNIVERSAL RADIO FREQUENCYINTERROGATOR (URFI) USER’S MANUAL(PRELIMINARY VERSION)AMERICAN METER COMPANYAUTOMATED SYSTEMS BUSINESS UNIT107 ERSKINE LANESCOTT DEPOT, WEST VIRGINIA 25560
OverviewThe Universal Radio Frequency Interrogator® (URFI®) is a portable radio transceiverused in conjunction with any customer-supplied handheld or portable computer toprovide remote meter reading of Trace® system transponders. The Trace system isdesigned to convert the mechanical index reading of a utility meter to a duplicateelectronic register reading. This electronic register reading is transmitted via radiofrequency (RF) signals to the URFI. The URFI reads each transponder by means of anRF interrogation that consists of a unique serial number along with a commandrequesting the contents of the electronic register. The meter reading route data, whichcontains the street address and serial number of each transponder that is to be read, isstored by the computer, as is the actual meter reading following a successfulinterrogation; no data is stored in the URFI itself.The URFI is controlled by a number of commands sent from the computer. Primaryfunctions controlled by the computer’s route-reading application are: initiation ofinterrogation; setting of receiver channel; and setting of power up/down modes.A typical interrogation sequence consists of the following.1. The computer powers up the URFI and the URFI performs its initialization routine,which includes programming the receiver and transmitter frequency synthesizers.2. The computer sends the serial number of the transponder to be interrogated to theURFI through a serial port connection.3. The URFI transmits a synchronization data pattern followed by the transponder serialnumber. This transmission is approximately 1.5 seconds in length.4. A transponder ‘wakes up’ at some point during the URFI’s synchronization datapattern transmission, hears the serial number and replies with the meter reading dataif the serial number heard matches its own. Otherwise, the transponder goes back tosleep.5. The URFI receiver listens for the transponder reply. If no valid data is detected, thereceiver scans a range of adjacent channels for valid data. In this way, the receiverfinds a drifted transponder signal, and the URFI sends the transponder channel to thecomputer; the URFI then re-interrogates with its receiver set to the new channel.6. When the URFI receiver receives a valid transponder reading, this data is passed fromthe URFI to the computer for storage.
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Document ID16497
Application IDhD6TMakjO1YsXbbz+ony6Q==
Document DescriptionUser Manual
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize1.13kB (14079 bits)
Date Submitted1998-12-16 00:00:00
Date Available1999-02-09 00:00:00
Creation Date2001-07-10 09:10:40
Producing SoftwareAcrobat Distiller 4.0 for Windows
Document Lastmod2001-07-10 09:10:42
Document TitleUser Manual
FCC ID Filing: G8JURF01

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