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A3 ALPHA Meter Technical Manual Contents A3 ALPHA® Meter Electronic Meter for Electric Energy Measurement Technical Manual TM42-2190B US English (en) © 2003 by Elster Electricity, LLC. All rights are reserved. No part of this software or documentation may be reproduced, transmitted, processed or recorded by any means or form, electronic, mechanical, photographic or otherwise, translated to another language, or be released to any third party without the express written consent of Elster Electricity, LLC. Printed in the United States of America. Notice The information contained in this software and documentation is subject to change without notice. Product specifications cited are those in effect at time of publication. Elster Electricity, LLC shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. Elster Electricity, LLC expressly disclaims all responsibility and liability for the installation, use, performance, maintenance and support of third party products. Customers are advised to make their own independent evaluation of such products. ALPHA and ALPHA Plus are registered trademarks and Metercat and AlphaPlus are trademarks of Elster Electricity, LLC. Other product and company names mentioned herein may be the trademarks and/or registered trademarks of their respective owners. A3 ALPHA Meter Technical Manual Contents TM42-2190B A3 ALPHA Meter Technical Manual Contents FCC Compliance . vii Class B Devices. vii Class A Devices . vii Telephone Regulatory Information . viii Disclaimer of Warranties and Limitation of Liability. .ix Safety Information. x Revisions to This Document . .xi 1. Introduction . 1-1 The A3 ALPHA Meter . 1-2 Standards Compliance. 1-3 Benefits . 1-4 Reliability. 1-4 Maintainability . 1-4 ANSI Standard Communication . 1-4 Adaptability . 1-4 Economy . 1-5 Security . 1-5 Accuracy . 1-5 Features . 1-6 Standard Features . 1-6 Advanced Features . 1-6 Option Boards . 1-7 Meter Types . 1-8 Demand Meters . 1-8 TOU Meters . 1-8 kVA Meters . 1-8 Reactive Meters . 1-9 Meter Types Suffixes . 1-10 Alpha Keys. 1-10 2. Product Description . 2-1 System Overview . 2-2 System Architecture. 2-2 General Theory of Operation . 2-2 Power Supply . 2-2 Current and Voltage Sensing. 2-2 Meter Engine . 2-3 2003.February.28 TM42-2190B i Contents A3 ALPHA Meter Technical Manual Microcontroller . 2-3 EEPROM . 2-3 Billing Data . 2-4 Metered Energy and Demand Quantities. 2-4 Average Power Factor . 2-5 Demand Calculations . 2-5 Maximum Demand . 2-7 Demand Forgiveness . 2-9 Primary and Secondary Metering . 2-9 TOU Data . 2-10 Power Fail Data . 2-10 Logs and Data Sets . 2-10 Event Log . 2-11 History Log . 2-11 Self Reads . 2-11 Load Profiling . 2-12 Instrumentation Profiling . 2-13 PQM Log . 2-14 Voltage Sag Log . 2-15 User Defined Tables . 2-15 Physical Description . 2-16 Cover Assembly . 2-16 Electronic Assembly . 2-16 Base Assembly. 2-17 Physical Dimensions . 2-19 3. Operating Instructions . 3-1 Indicators and Controls. 3-2 LCD. 3-2 Quantity Identifier . 3-2 Display Quantity . 3-2 Potential Indicators . 3-3 EOI Indicator. 3-3 Real Energy Indicators . 3-3 Alternate Energy Indicators . 3-3 Power/Energy Units Identifier . 3-4 Operating Mode Indicator . 3-4 Display Identifiers . 3-5 Using the Push Buttons . 3-5 RESET Button . 3-6 ALT Button . 3-7 RESET/ALT Mechanism . 3-8 TEST Button . 3-8 Clearing Billing Data . 3-9 Operating Modes . 3-11 Normal Mode. 3-11 Alternate Mode . 3-11 Test Mode . 3-12 Optically–Initiated Test Mode. 3-13 Demand Reset . 3-14 Demand Reset Lockout . 3-15 Demand Reset Data Area . 3-15 ii TM42-2190B 2003.February.28 A3 ALPHA Meter Technical Manual Contents 4. Meter Tools . 4-1 System Instrumentation . 4-2 System Service Tests . 4-7 Service Voltage Test. 4-7 Overview. 4-7 System Service Locking . 4-7 Initiating Service Voltage Tests . 4-10 Restarting the Service Voltage Test in Diagnostic Mode4- 13 Service Current Test. 4-14 Initiating the Service Current Test . 4-15 System Service Error Codes . 4-16 PQM. 4-18 Voltage Sags . 4-19 Voltage Sag Counter and Timer . 4-19 PQM Tests. 4-20 PQM Event Counters and Timers . 4-20 Service Voltage Test . 4-21 Low Voltage Test. 4-21 High Voltage Test . 4-22 Reverse Power Test & PF Test . ..
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