Sensus Metering Systems 520C User Manual
Model 520C User’s Guide
Revision 1.0, 13 September, 2004
Sensus Metering Systems-North America Inc.
This document contains proprietary information. It may not be copied,
transmitted or distributed, in whole or in part, without the consent of Sensus
Metering Systems-North America Inc.
Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
REVISION SUMMARY
Date Author Change Description
12 August, 2004 GM/CP/AN Baseline
13 September, 2004 GM Removed references to Register wiring. Cleanup.
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Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
TABLE OF CONTENTS
1. INTRODUCTION ......................................................................................................................................3
1.1 REFERENCE DOCUMENTS.....................................................................................................................3
1.2 OPEN ISSUES........................................................................................................................................3
1.3 GLOSSARY ...........................................................................................................................................4
2. CELLNET WATER MTU OVERVIEW..................................................................................................5
2.1 FEATURES............................................................................................................................................5
2.1.1 Field Configurable.....................................................................................................................................5
2.1.2 Magnetic Switch Controlled Activation/Deactivation...............................................................................5
2.1.3 Magnetic Switch Forced Transmission......................................................................................................5
2.1.4 Touch Coupled Register Interface.............................................................................................................5
2.1.5 Battery Life................................................................................................................................................5
2.1.6 FCC ...........................................................................................................................................................6
2.2 FUNCTIONAL DESCRIPTION ..................................................................................................................7
2.2.1 Overview ...................................................................................................................................................7
2.2.2 Description ................................................................................................................................................7
2.2.2.1 Installing the Endpoint.........................................................................................................................7
2.2.2.2 Activation...........................................................................................................................................12
2.2.2.3 Operation............................................................................................................................................15
2.2.2.4 Diagnostics.........................................................................................................................................16
2.2.2.5 Forcing a Meter Read.........................................................................................................................16
2.2.2.6 Deactivation.......................................................................................................................................16
2.2.3 Summary..................................................................................................................................................18
2.3 CONFIGURATION ................................................................................................................................19
2.3.1 Configuration as Shipped ........................................................................................................................19
2.3.2 Supported Encoders.................................................................................................................................20
2.3.3 Re-Configuring In the Field ....................................................................................................................20
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Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
1. Introduction
This document describes how to install, activate, operate and deactivate the
CellNet Meter Transponder Unit (MTU).
1.1 Reference Documents
The following documents are referenced by this document:
[1] RF LAN1 Air Interface Specification (95-1501Rev. A), CellNet,
5 May 2004
[2] Preliminary – Protocol Data Unit Specification, PID 0x02, 0x03, 0x04
–
Electric, Gas and Water Meter Packets Rev. C, CellNet, 5 May 2004
1.2 Open Issues
•
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Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
1.3 Glossary
BPSK Binary Phase Shift Keying
CRC Cyclic Redundancy Check
ECR Electronically Controlled Register
FCC Federal Communications Commission
JEA Jacksonville Electric Authority
kHz Kilohertz
LAN Local Area Network
LED Light Emitting Diode
MHz Megahertz
MTU Meter Transmitter Unit
OOK On-Off Keying
RAD-40 CellNet proprietary compression scheme
RF Radio Frequency
TRPL Touch Read Pit-Lid
TX Transmit
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Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
2. CellNet Water MTU Overview
The sections which follow provide a high-level functional description of the
CellNet Water MTU.
2.1 Features
The CellNet Water MTU provides the following features:
2.1.1 Field Configurable
The CellNet Water MTU can be configured via the programming interface using
the Touch Gun. Configurable parameters are as specified in [ref 2]. Note that
configuration is limited to parameter settings that are consistent with the
Marketing Specification – particularly with respect to battery life.
Field re-configurability is not supported for this release, but will be supported in
subsequent releases of this product.
2.1.2 Magnetic Switch Controlled Activation/Deactivation
The CellNet Water MTU can be “activated” and “deactivated” by passing a
magnet over a magnetic switch present on the endpoint.
2.1.3 Magnetic Switch Forced Transmission
Once the CellNet Water MTU has been activated, it can be forced to transmit
meter readings by passing a magnet over the magnetic switch.
2.1.4 Touch Coupled Register Interface
The CellNet Water MTU communicates with the register via an inductive
interface, making the endpoint/register connection easier to install and less
prone to water damage due to incorrect installation.
2.1.5 Battery Life
The CellNet Water MTU, when deployed as configured at the factory, will
operate for [TBD] years.
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Sensus Metering Systems-North America Inc. CellNet Water MTU User’s Guide
2.1.6 FCC
The CellNet Water MTU is FCC Approved. The CellNet Water MTU transmits
using frequencies in the 900MHz ISM band and as such deployment of the
CellNet Water MTU does not require an FCC license.
Changes or modifications not expressly approved by Sensus Metering
Systems could void the user's authority to operate the equipment.
To meet FCC RF exposure requirements a distance of at least 20 cm (8
inches) must be maintained between the transmit antenna and all
persons.
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