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Installation Instructions | Users Manual | 87.39 KiB | July 03 2007 | |||
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User Manual | Users Manual | 969.57 KiB | July 03 2007 | |||
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| 1 | Test Setup Photos | July 03 2007 |
| 1 | Installation Instructions | Users Manual | 87.39 KiB | July 03 2007 |
August 2005 IL42-4026D IL42-4026D REX Meter Installation Instructions General This leaflet contains installation instructions for the REX residential electronic watthour meter with the following form factors:
self-contained: Forms 1S, 2S, and 12S transformer-rated: Forms 3S and 4S All meters are calibrated and sealed before shipment. For proper installation, accuracy, and maximum life of the meters, use the following procedures.
WARNING Use authorized utility procedures to install and service metering equipment. Dangerous voltages are present. Equipment damage, personal injury, or death can result if safety procedures are not followed.
WARNING When using the REX meter with the internal service control switch, follow authorized utility procedures to reconnect electrical service. Property damage, personal injury, or death can result if safety precautions are not followed. Installing the REX Meter 1. Make sure the meter to be installed matches service type (that is, form), current class, capacity required, and service socket. 2. Check the socket and verify that the wiring is correct. See Internal Wiring Diagrams on page 2 and Installation Wiring Diagrams on page 3 for all wiring diagrams. 3. Make sure that the voltage disconnect or test link on the back of the meter is closed, if installed. 4. Line up the meter blades to the socket jaws and rock the meter into place. Make sure that the meter is in the upright position. 5. Make sure the LCD turns on and the energy use indicator flashes if load is present. If load is applied, check that the pulse arrows on the LCD are blinking. The LCD has two pulse arrows. The arrow pointing to the left indicates energy received; the arrow pointing to the right indicates energy delivered. For more information, see the technical manual for your meter. 6. Apply all seals and record any necessary information. Elster Electricity, LLC Raleigh, North Carolina USA
+1 800 338 5251 (US Technical Support)
+1 800 257 9754 (US Sales Support)
+1 919 212 4800 (US Main)
+1 905 634 4895 (Canada Main) support@us.elster.com www.elsterelectricity.com IL42-4026D August 2005 Internal Wiring Diagrams
WARNING Use circuit-closing devices on current transformer secondaries used with Form 3S and Form 4S meters. Dangerous currents and voltages are present. Equipment damage, personal injury, or death can result if circuit-closing devices are not used. PS PS Form 1S Form 3S PS Alternate positions of movable potential terminal Form 2S PS Form 4S Form 12S PS 5 0 H 1 3 Alternate positions of movable potential terminal 2 August 2005 IL42-4026D Installation Wiring Diagrams
WARNING Use circuit-closing devices on current transformer secondaries used with Form 3S and Form 4S meters. Dangerous currents and voltages are present. Equipment damage, personal injury, or death can result if circuit-closing devices are not used. 1 N 1 N 1 N 2 1 2 N N 1 L O A D Form 1S 1 0 E 0 2 1 phase, 2 wire selfcontained 1 2 N L O A D 1 0 E 0 2 Form 2S 1 phase, 3 wire selfcontained 1 1 N N CIRCUIT CLOSING DEVICE 1 N 2 1 2 N CIRCUIT CLOSING DEVICE 1 2 N 1 2 N Service side voltage Load side voltage Service control switch 1 2 N L O A D 3 0 L 6 1 Form 2S 1 phase, 3 wire with service control swith (open) selfcontained 1 N 2 1 2 N CIRCUIT CLOSING DEVICE 3 0 G 1 1 Form 3S 1 phase, 2 wire 1 CT, no VTs 3 0 G 1 1 Form 3S 1 phase, 3 wire 1 CT, no VTs 3 0 G 1 1 Form 4S 1 Phase, 3 Wire 2 CTs, no VTs 3 August 2005 IL42-4026D 2 N 1 1 2 N 1 2 N L O A D 120/208 service voltage only 5 0 H 9 2 Form 12S 2 phase, 3 wire wye selfcontained 2 N 1 1 2 N Service side voltage Load side voltage 120/208 service voltage only 5 0 H 5 2 Form 12S 2 phase, 3 wire wye selfcontained Service control switch 1 2 N L O A D FCC and Industry Canada Compliance Compliance Statement (Part 15.19): The REX meter complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1) This device may not cause harmful interference, and 2) This device must accept any interference received, including interference that may cause undesired operation. Warning (Part 15.21): Changes or modifications not expressly approved by Elster Electricity, LLC could void the users authority to operate the equipment. RF Radiation Safety Guidelines per Part 2 of FCC Rules and Regulations: The meter should be installed in a location where there will be a separation greater than 20 cm from locations occupied by humans. User Information (Part 15.105): The REX meter has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Move the receiving equipment farther away from the REX meter. Consult the dealer or an experienced radio/TV technician for help. Industry Canada Statement: The term IC before the certification/registration number only signifies that the Industry Canada technical specifications were met. DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY There are no understandings, agreements, representations, or warranties either express or implied, including warranties of merchantabil-
ity or fitness for a particular purpose, other than those specifically set out by any existing contract between the parties. Any such con-
tract states the entire obligation of the seller. The contents of this document shall not become part of or modify any prior existing agreement, commitment, or relationship. The information, recommendations, descriptions, and safety notices in this document are based on Elster Electricity, LLC experience and judgment with respect to operation and maintenance of the described product. This information should not be considered as all-
inclusive or covering all contingencies. If further information is required, Elster Electricity, LLC should be consulted. No warranties, either expressed or implied, including warranties of fitness for a particular purpose or merchantability, or warranties arising from the course of dealing or usage of trade, are made regarding the information, recommendations, descriptions, warnings, and cau-
tions contained herein. In no event will Elster Electricity, LLC be responsible to the user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental, or consequential damage or loss whatsoever, including but not limited to: damage or loss of use of equipment, cost of capital, loss of profits or revenues, or claims against the user by its customers resulting from the use of the informa-
tion, recommendations, descriptions, and safety notices contained herein. Elster Electricity, LLC Raleigh, North Carolina USA
*IL42-4026D*
*IL42-4026D*
2005 by Elster Electricity, LLC. All rights reserved. Printed in the United States.
| 1 | User Manual | Users Manual | 969.57 KiB | July 03 2007 |
Technical Manual TM42-2210C REX Meter 3UHOLPLQDU\Contact Elster Electricity for information 2006 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. ALPHA, ALPHA Plus, and EnergyAxis are registered trademarks, and REX, 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. DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY There are no understandings, agreements, representations, or warranties either express or implied, including warranties of mer-
chantability or fitness for a particular purpose, other than those specifically set out by any existing contract between the parties. Any such contract states the entire obligation of the seller. The contents of this document shall not become part of or modify any prior existing agreement, commitment, or relationship. The information, recommendations, descriptions, and safety notices in this document are based on Elster Electricity, LLC expe-
rience and judgment with respect to operation and maintenance of the described product. This information should not be con-
sidered as all-inclusive or covering all contingencies. If further information is required, Elster Electricity, LLC should be consulted. No warranties, either expressed or implied, including warranties of fitness for a particular purpose or merchantability, or warran-
ties arising from the course of dealing or usage of trade, are made regarding the information, recommendations, descriptions, warnings, and cautions contained herein. In no event will Elster Electricity, LLC be responsible to the user in contract, in tort (including negligence), strict liability or other-
wise for any special, indirect, incidental, or consequential damage or loss whatsoever, including but not limited to: damage or loss of use of equipment, cost of capital, loss of profits or revenues, or claims against the user by its customers resulting from the use of the information, recommendations, descriptions, and safety notices contained herein. 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual Contents Contents FCC and Industry Canada Compliance . v Compliance Statement (Part 15.19) . v Warning (Part 15.21) . v RF Radiation Safety Guidelines per Part 2 of FCC Rules and Regulations . v User Information . v Industry Canada Statement . v Disclaimer of Warranties and Limitation of Liability . vi Safety Information . vii Revisions to This Document . viii 1. Introduction . 1-1 The REX Meter . 1-1 Standards Compliance . 1-2 Benefits . 1-3 Reliability . 1-3 Maintainability . 1-3 Adaptability . 1-3 Economy. 1-3 Security. 1-3 Accuracy. 1-3 Features . 1-4 Meter Forms. 1-4 2. Product Description . 2-1 System Overview . 2-1 System Architecture. 2-1 General Theory of Operation . 2-2 Power Supply . 2-2 Current and Voltage Sensing . 2-2 Meter Engine. 2-3 Microcontroller . 2-3 EEPROM. 2-3 Billing Data. 2-3 Metered Energy. 2-3 Demand Calculation . 2-4 Maximum Demand . 2-4 Demand Forgiveness. 2-4 TOU Data . 2-5 Load Profiling. 2-5 Kh pulse divisor . 2-6 Physical Description . 2-6 Meter Cover. 2-7 30 November 2006 i 3UHOLPLQDU\Contact Elster Electricity for information Contents REX Meter Technical Manual Nameplate . 2-7 Inner Housing . 2-7 Main Circuit Board . 2-8 Circuit Board Support Frame . 2-8 Meter Base . 2-8 Physical Dimensions . 2-10 3. Operating Instructions . 3-1 Indicators and Controls . 3-1 LCD. 3-1 Display Quantity . 3-2 Real Energy Indicators. 3-2 Power/Energy Unit Identifier . 3-3 Operating Mode . 3-3 Resetting the REX Meter . 3-4 Demand Reset. 3-4 Demand reset data area . 3-4 Clear Billing Data . 3-5 Clear Data . 3-5 Reading the REX Meter . 3-6 4. Outputs . 4-1 Optical Pulse Outputs. 4-1 5. Testing . 5-1 Meter Self Test . 5-1 Error and Status Codes . 5-1 Error codes . 5-1 Status codes. 5-3 Meter Shop Testing . 5-5 Test Equipment . 5-5 Test Setup . 5-6 General test setup . 5-6 Formulas Used in Testing . 5-7 Watthour constant. 5-8 Calculating meter accuracy . 5-8 Determining the power . 5-8 Meter Testing . 5-8 Watthour Testing . 5-9 Installation Site Testing . 5-10 Accuracy Tests . 5-10 6. Installation and Removal . 6-1 Preliminary Inspection. 6-1 Placing the Meter into Service . 6-2 Installing the REX Meter . 6-2 Initial Setup . 6-3 Removing the Meter from Service. 6-4 Removing the REX Meter. 6-4 Disassembling and Reassembling the Meter . 6-5 Removing the Meter Cover . 6-5 Removing the Inner Housing . 6-5 Removing the Electronic Components . 6-6 Removing the Main Circuit Board . 6-7 ii 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Contents Reassembling the Meter . 6-7 A. Glossary . A-1 B. Display . B-1 Display Format . B-1 Display Items . B-2 LCD Test . B-2 Error Codes and Status Codes . B-2 Current Time and Rate. B-3 Metered Quantities. B-3 Energy Quantities . B-3 Demand Quantities . B-4 Received Energy Quantity . B-4 Per Phase Voltage Present Indicators. B-5 Network Registration Status . B-6 C. Nameplate Information . C-1 REX Meter Nameplate . C-1 Transformer Rated Meter Information. C-1 Lower Portion . C-2 D. Wiring Diagrams. D-1 Internal Wiring Diagrams . D-1 Installation Wiring Diagrams . D-2 E. Technical Specifications . E-1 Absolute Maximums. E-1 Operating Ranges . E-1 Operating Characteristics . E-2 General Performance Characteristics . E-2 30 November 2006 iii 3UHOLPLQDU\Contact Elster Electricity for information Contents REX Meter Technical Manual iv 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual Contents FCC and Industry Canada Compliance Compliance Statement (Part 15.19) The REX meter complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation Warning (Part 15.21) Changes or modifications not expressly approved by Elster Electricity, LLC could void the users authority to operate the equipment. RF Radiation Safety Guidelines per Part 2 of FCC Rules and Regulations The meter should be installed in a location where there will be a separation greater than 20 cm from locations occupied by humans on other than an incidental or transitory basis. User Information The REX meter has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Move the receiving equipment farther away from the REX meter. Consult the dealer or an experienced radio/TV technician for help. Industry Canada Statement The term IC before the certification/registration number only signifies that the Industry Canada technical specification were met. 07 April 2006 v 3UHOLPLQDU\Contact Elster Electricity for information Contents Disclaimer of Warranties and Limitation of Liability REX Meter Technical Manual There are no understandings, agreements, representations, or warranties either expressed or implied, including warranties of merchantability or fitness for a particular purpose, other than those specifically set out by any existing contract between the parties. Any such contract states the entire obligation of the seller. The contents of this technical manual shall not become part of or modify any prior or existing agreement, commitment, or relationship. The information, recommendations, descriptions, and safety notices in this technical manual are based on Elster Electricity, LLC experience and judgment with respect to the operation and maintenance of the described product. This information should not be considered as allinclusive or covering all contingencies. If further information is required, Elster Electricity, LLC should be consulted. No warranties, either expressed or implied, including warranties of fitness for a particular purpose or merchantability, or warranties arising from the course of dealing or usage of trade, are made regarding the information, recommendations, descriptions, warnings, and cautions contained herein. In no event will Elster Electricity, LLC be held responsible to the user in contract, in tort (including negligence), strict liability, or otherwise for any special, indirect, incidental, or consequential damage or loss whatsoever, including but not limited to: damage or loss of use of equipment, cost of capital, loss of profits or revenues, or claims against the user by its customers from the use of the information, recommendations, descriptions, and safety notices contained herein. vi 07 April 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Safety Information Contents Installation, operation, and maintenance of this product can present potentially hazardous conditions (for example, high voltages) if safety procedures are not followed. To ensure that this product is used safely, it is important that you:
Review, understand, and observe all safety notices and recommendations within this manual. Do not remove or copy individual pages from this manual, as this manual is intended for use in its entirety. If you were to remove or copy individual pages, cross references and safety notices may be overlooked, possibly resulting in damage to the equipment, personal injury, or even death. Inform personnel involved in the installation, operation, and maintenance of the product about the safety notices and recommendations contained in this manual. Within this manual, safety notices appear preceding the text or step to which they apply. Safety notices are divided into the following 4 classifications:
Notice is used to alert personnel to installation, operation, or maintenance information that is important but not hazard related. Caution is used to alert personnel to the presence of a hazard that will or can cause minor personal injury, equipment damage, or property damage if the notice is ignored. Warning is used to alert personnel to the presence of a hazard that can cause severe personal injury, death, equipment damage, or property damage if notice is ignored. Danger is used to alert personnel to the presence of a hazard that will cause severe personal injury, death, equipment damage, or property damage if the notice is ignored. 07 April 2006 vii 3UHOLPLQDU\Contact Elster Electricity for information Contents Revisions to This Document Revision A B Date 12 August 2003 30 July 2004 C REX Meter Technical Manual The REX Meter Technical Manual can be referred to by its document number:
TM422210. Each revision of this manual is designated with a letter, with the first revision being A, the second being B, and so forth. The document number and its revision are located at the bottom of each page. The following table lists the revisions to this document, the date of the release, and any notes about the changes made. Brief Description First release of the document. Changed layout of the document. Changed name of service disconnect switch to service control switch in Chapter 1. Added information about firmware release 2.0 & 3.0 in Load Profiling (Chapter 2), Table 2-2, Table 3-
1, and Appendix B. Corrected the number of load profiling pulses REX meter can store in Chapter 2. Corrected entries in Table 2-2. Expanded Demand Reset section in Chapter 3. Added Clear Billing Data to Chapter 3. Corrected Chapter 4. Corrected caption in Figure C-3. Other minor edits were made to clarify the text already in the manual. Added information regarding Form 12S meters. viii 07 April 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 1 Introduction 1 Introduction The REX Meter The REX meter, manufactured by Elster Electricity, is an all-electronic meter focused exclusively on residential electricity revenue metering applications. This meter meets or exceeds ANSI C12.1, C12.10, C12.20, and other appropriate industry standards. While capable of operating as a stand-alone meter for certain functions, the REX meter is primarily designed to provide a flexible metering platform that can operate with a variety of communications technologies to provide remote or automated meter data collection, also referred to as automated meter reading
(AMR). The meter consists of a socket-mounted meter enclosure with current and voltage sensors connected to a powerful microprocessor-based metering calculation engine. The unit measures, processes, stores, and locally displays energy (kWh) and other related metering data via an integral liquid crystal display. Metering data is also made available to AMR communications modules that can either be mounted onto the main metering circuit board or added as optional separate circuit boards for which space is provided under the meter cover. The REX meter can include an integral Elster Electricity-designed radio frequency (RF) transmitter and receiver module that operates in the 900 MHz unlicensed spectrum. The 900 MHz module allows the REX meter to support two-way communications with other meters in an Elster Electricity-designed RF-
based local area network (LAN) for automated meter reading. The Elster Electricity RF LAN technology includes such functions as automatic registration upon installation, network time synchronization, downloading of time-of-use
(TOU) metering schedules, scheduled demand reset, reprogramming of REX functions, and numerous other features. The REX meter and its 900 MHz LAN module are part of the Elster Electricity EnergyAxis System for meter data collection and management, which is designed to support full two-way AMR capability to every REX meter. By using the full capabilities of its meter engine and the Elster Electricity 900 MHz RF LAN, the REX meter offers a highly flexible metering platform, allowing implementation of metering functions such as basic energy measurement (kWh), power (kW demand), TOU metering, load profile interval recording, and critical tier pricing. With the Elster Electricity EnergyAxis System, any of these features can be engaged or disengaged remotely at any time, thus offering operational flexibility without the costs of manual meter reading, equipment change-outs, site visits, meter reprogramming, and other expenses. 30 November 2006 1-1 3UHOLPLQDU\Contact Elster Electricity for information 1 Introduction REX Meter Technical Manual This manual is a guide to the features and operating characteristics of the REX meter. Other technical manuals or operator guides provide additional information on other EnergyAxis System components, including the Elster Electricity Metering Automation Server (MAS), the A3 ALPHA meter/collector, and the Elster Electricity 900 MHz RF LAN. See Figure 1-1 for an illustration of a REX meter. Figure 1-1. REX meter Pkh Mult. By VTR
:1 CTR
:5 SERIAL # 12 345 678 FCC ID: QZC-RX9A TYPE R1S REX METER NAMEPLATE
*G012345678901234567*
*G012345678 *
CL20, 120 TO 240V, 3W, 60Hz FM 4S Watthour Meter Kh 1.0 TA 2.5 ZCC22000000 LAN ID: 255-1970110102 2551970110102 Standards Compliance The REX meter meets or exceeds the American National Standards Institute
(ANSI) standards for electricity metering, and it is intended for use by single phase utility customers. Number Date Title ANSI C12.1 2001 American National Standard for Electric Meters Code for Electricity Metering ANSI C12.10 ANSI C12.20 1997 1998 Electromechanical Watthour Meters American National Standard for Electricity Meters 0.2 and 0.5 Accuracy Classes 1-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 1 Introduction Benefits Reliability. The REX meter design is patterned after the ALPHA meter technology which has established a reputation as a reliable and accurate meter for electrical energy measurement. The highly selective choice of meter components provides for a very reliable meter. The REX meter uses nonvolatile electrically erasable programmable read only memory (EEPROM) to store its customer-specific configuration parameters and all meter data. If power is interrupted, the data will be preserved. Maintainability. The design provides easy access to the meter circuit board and all option boards. Circuit boards may be added or exchanged without special tools or rewiring. Adaptability. The REX meter is designed so that it may be easily upgraded to support additional option boards. The REX meter has also been designed to support an internal service control switch that can connect and disconnect electrical service to a consumer. The service control switch must be specified at the time of ordering. Economy. The REX meter saves both time and money. It can increase personnel productivity due to the following features:
no user calibration required (factory-calibrated) reduced test time LED test pulse output through the front of the meter light weight for easy handling Security. The REX meter is tamper-resistant. Since there are no moving parts, traditional tampering techniques on the REX meter will be less successful than on electromechanical meters. The REX meter is also a bidirectional meter. It always measures kWh received as well as the selected energy quantity. A polycarbonate cover resists cracking and breakage due to physical abuse. The meter counts and stores the number of power failures, which can be used to help detect tampering with the meter service. Accuracy. The REX meter is a 0.5 % accuracy class meter (as defined by ANSI C12.20) and meets or exceeds ANSI and IEEE requirements. The meter precisely measures and displays energy usage consistently with the meter class purchased and through a range of the following variations:
current temperature voltage power factor frequency The low current sensor burden may also improve the accuracy of external current transformers when measuring light loads. 30 November 2006 1-3 3UHOLPLQDU\Contact Elster Electricity for information 1 Introduction Features REX Meter Technical Manual The REX meter comes with many features, such as:
kWh energy measurement of the selected metered quantity kWh received energy measurement TOU kWh energy measurement kW demand measurement test LED and Kh = 1.0 Wh/pulse period load profile recording 6-digit liquid crystal display (LCD) inner housing polycarbonate meter cover versatile packaging allowing for future options two-way, 900 MHz radio communications module Meter Forms The REX meter is available in the following ANSI form factors:
Form 1S Form 2S Form 3S Form 4S Form 12S A-base (bottom-connected) meter requirements can be met using one of the above meters with an appropriate socket adapter. 1-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 2 Product Description 2 Product Description System Overview System Architecture The REX meter main circuit board contains all the electronics that make up the meter and integral registers. See Figure 2-1 for the single phase REX meter block diagram (including the integral 900 MHz radio). See Figure 2-2 for the Form 12S REX meter block diagram (including the integral 900 MHz radio). Figure 2-1. REX meter block diagram (single phase meters) 16-pin header Current CT fref = 20.48 MHz Wh del Wh rec SPI bus #1 Meter engine Voltage Resistive divider EEPROM 20.48 MHz Optical port Microcontroller LCD fref = 20.48 MHz SPI bus #2 Tx data Rx data 900 MHz radio 3.3 V power supply 3.3 V 6.4 V power supply 6.4 V 30 November 2006 2-1 3UHOLPLQDU\Contact Elster Electricity for information 2 Product Description Figure 2-2. REX meter block diagram (Form 12S meters) REX Meter Technical Manual 16-pin header fref = 20.48 MHz Wh del Wh rec SPI bus #1 EEPROM 20.48 MHz Optical port Microcontroller LCD fref = 20.48 MHz SPI bus #2 Tx data Rx data 900 MHz radio Phase A current Phase C current CT CT Phase A voltage Resistive divider Phase C voltage Resistive divider Meter engine 3.3 V power supply 3.3 V 6.4 V power supply 6.4 V General Theory of Operation Power Supply. The single phase (Forms 1S, 2S, 3S, and 4S) REX meter can accept a line voltage of 120 VAC to 240 VAC 20 % (96 VAC to 288 VAC). The Form 12S meter can accept a line voltage of 120 VAC 20 % (96 VAC to 144 VAC). Using this input voltage, a power supply generates a 6.4 V and 3.3 V supply. On Form 12S meters, phase A voltage must be present to power the meter circuitry. Current and Voltage Sensing. Power line currents and voltages are sensed using specialized current sensors and resistive dividers, respectively. Multiplication and other calculations are performed using an integrated circuit
(called the meter engine). The meter receives the current through a precision-wound current transformer that reduces the line current proportionally. The meter engine samples the phase current to provide accurate current measurements. The meter receives the voltage through resistive dividers to ensure that a linear logic level voltage is maintained. This also serves to minimize phase shift over a wide dynamic range. The meter engine samples the scaled inputs provided by the resistive dividers to provide accurate voltage measurements. 2-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 2 Product Description Meter Engine. Multiplication and other calculations are performed using the meter engine. The meter engine contains the digital signal processor (DSP) with built-in analog-to-digital (A/D) converters capable of sampling each current and voltage input. The DSP multiplies the signals appropriately, using the factory-
programmed calibration constants. Microcontroller. The microcontroller performs many different functions, for example:
communicates with the meter engine and EEPROM accumulates energy usage data and computes kWh, kW, TOU kW, and load profiling data sends output pulses controls the LCD controls the optical port provides an option board interface The microcontroller and the meter engine communicate with each other constantly to process and accumulate energy measurements. When the microcontroller detects a power failure, it initiates a shutdown. A shutdown is the process that stores billing and status information in EEPROM. EEPROM. The REX meter uses EEPROM for nonvolatile storage of manufacturing data, meter configuration data, and energy measurement data. During a power failure, the EEPROM provides storage of all the information needed to ensure the integrity of the energy calculations, including the following:
configuration data billing data meter status constants energy usage Billing Data Metered Energy. The meter engine samples the voltage and current inputs, computes energy, and sends these measurements to the microcontroller. In the meter engine, each pulse is equal to one Ke defined as secondary-rated Wh per pulse. The Ke is specific for each meter form factor, as defined in Table 2-1. Table 2-1. Ke for each REX meter form factor Form 1S 2S 3S 4S 12S Ke 0.1 0.1 0.01 0.01 0.1 Kh 1.0 1.0 1.0 1.0 1.0 The REX meter can measure any one of the following quantities:
kWh delivered 30 November 2006 2-3 3UHOLPLQDU\Contact Elster Electricity for information 2 Product Description REX Meter Technical Manual kWh received kWh sum (kWh delivered + kWh received) kWh net (kWh delivered - kWh received) The metered quantity is used to calculate total energy, energy on a TOU basis, demand, and load profiling data. Note: When the selected metered quantity is kWh net, the meter calculates demand from kWh-delivered and stores kWh-
delivered pulses for load profiling. Demand Calculation. Demand is the average value of power over a specified interval of time. The REX meter supports the block interval method for demand calculation. The demand interval is specified in minutes and must be 15, 30, or 60 minutes. The block interval calculates demand using the following equation:
D =
total accumulate d energy t hours Figure 2-3. Maximum demand For example, if the demand interval is 15 minutes and the total accumulated energy is 50 kWh, then the demand is 200 kW.
D kWh 50 0.25 h
200 kW Maximum Demand. Maximum demand (also referred to as indicating demand) is the highest demand value that occurs in a billing period. The demand for each demand interval is calculated and compared to an earlier maximum demand value. If the new interval value exceeds the previous maximum demand, then the new demand is stored as the maximum demand
(see Figure 2-3). When a demand reset occurs, the maximum demand is reset to zero. The demand for the first full interval after the demand reset becomes the maximum demand. New maximum demand (9.9 kW) Earlier maximum demand (9.9 kW) Earlier maximum demand (9.7 kW) Interval 7 demand
(9.9 kW) Interval 8 demand
(9.5 kW) Interval 6 demand
(9.2 kW) Demand Forgiveness. Demand forgiveness is the time during which demand is not calculated or stored after a power failure. The demand forgiveness may be set to a number between zero (disabled) and 255 minutes. 2-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual TOU Data. The REX meter stores the energy data for up to 4 rates. The meter stores demand data for 2 quantities where each quantity is configured to be one of the following:
2 Product Description total demand demand for a specific rate The REX meter receives the TOU switch point information from the collector, and stores this information for each of the following day types:
weekday weekend special day type #1 (that is, holiday #1) special day type #2 (that is, holiday #2) The switch point information received from the collector is associated with a specific season, and once received, the information is stored in nonvolatile memory in the REX meter and is valid until a season change occurs. When a season change occurs, the REX meter invalidates the switch point information until new switch points are downloaded from the collector. The REX meter stores energy in the default tier (rate C) if the switch points are invalid or if the REX meter does not know the real time. Without the collector, the REX meter does not know day type information. The collector downloads calendar information to the REX meter to specify the day type for the next 32 days. This 32-day calendar is stored in the REX meter and allows the REX meter to set the day type correctly at each midnight crossing. In addition to the switch points for the 4 day types, the REX meter has a separate table that allows for tier overrides or critical tier pricing. In conjunction with the MAS, the collector may be told a start time and a stop time for a tier override. When in a tier override condition, the collector writes the tier override table in the REX meter forcing the REX meter to use the override switch points for a specific period of time. At the end of the override period, the REX meter will revert to the standard switch points that are stored in the REX meters nonvolatile memory. Load Profiling The REX meter supports load profiling. REX meter firmware releases 1.0 and 2.0 support 104 load profiling records. REX meter firmware releases 3.0 and higher support 480 load profiling records. Each load profiling record stores one of the following:
Kh pulses of the metered quantity (scaled by a Kh pulse divisor) with status flags to indicate if a power failure or time change has occurred during the interval date and time 30 November 2006 2-5 3UHOLPLQDU\Contact Elster Electricity for information 2 Product Description REX Meter Technical Manual The load profiling interval is specified in minutes and must be 15, 30, or 60 minutes. The load profiling interval length can be different from the demand interval length. Interval length1 Maximum storage capacity Release 1.0 & 2.0 Release 3.0 and higher 15 minutes 30 minutes 60 minutes 26 hours 52 hours 104 hours 120 hours 240 hours 480 hours 1 An A3 ALPHA meter/collector is required to read the REX meter and accumulate larger load profiling records. Note:
If the metered quantity is kWh net, load profiling stores the number of kWh delivered pulses. Kh pulse divisor. A pulse divisor is used to scale down the number of Kh pulses recorded in each load profiling interval. This allows recording of data that may exceed the maximum number of pulses that can be stored in each load profiling interval (each interval can store 4095 pulses before overflowing). The standard value of Kh for all REX meters is 1.0. If the divisor is set to 10, then each load profiling pulse count represents 10 Wh. Physical Description The physical components of the REX meter consist of the following:
meter cover nameplate inner housing main circuit board circuit board support frame meter base See Figure 2-4 for an illustration of the REX meter physical components. 2-6 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Figure 2-4. Exploded view of the REX meter 2 Product Description Meter base Circuit board support frame Inner housing Main circuit board with RF module Nameplate Meter cover Meter Cover The meter cover of the REX meter is a polycarbonate housing designed to protect the inner assemblies of the meter. The ultraviolet (UV) stabilized polycarbonate cover reflects solar radiation, resulting in minimized discoloration and reduced internal heating. The gray polycarbonate side walls of the meter cover reduce the internal temperature rise caused by sun loading, which may extend the life of the electronic components. The cover has a clear plastic window that allows the meter LCD to be viewed. Removing the cover reveals the inner housing. Nameplate The nameplate is mounted on the inner housing. The nameplate identifies important information about the meter. For more information on the nameplate, see Appendix C, Nameplate Information. Inner Housing The polycarbonate inner housing is designed to provide extra protection to the electronic components and to allow the REX meter to be safely handled when the meter cover is removed. Removing the inner housing reveals the main circuit board, option boards, circuit board support frame, and meter base. 30 November 2006 2-7 3UHOLPLQDU\Contact Elster Electricity for information 2 Product Description REX Meter Technical Manual Main Circuit Board The main circuit board consists of the following components:
LCD power supply EEPROM meter engine microcontroller 900 MHz radio supporting electronics See General Theory of Operation on page 2-2 for an explanation of the general operation of the REX meter. Circuit Board Support Frame The REX meter circuit board support frame is designed to house the main circuit board and up to three option boards efficiently and conveniently. Two option boards can be installed above the main circuit board and one below the main circuit board using the circuit board support frame. Meter Base The meter base contains the following components:
base housing current and voltage blades either 1 or 2 current sensing transformers (depending on form) disconnect link (Form 2S meters only) hanger Table 2-2 shows the available ANSI compatible configurations for a socket-
connected (S-base) REX meter according to the type of service being metered. Table 2-2. REX meter available wiring forms Meter style1 Form Test Amps Class Elements Kh Type of service ZCA3xxxxxxx ZCA4xxxxxxx ZCC3xxxxxxx 1S 1S 2S ZCCWxxxxxxx 2S ZCC4xxxxxxx ZCA2xxxxxxx ZCC2xxxxxxx 2S 3S 4S ZC5Wxxxxxxx 12S 30 50 30 30 50 2.5 2.5 30 200 320 200 200 320 20 20 200 1 1 1 1 1 1 1 2 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 2-wire single phase 2-wire single phase 3-wire single phase 3-wire single phase (without voltage disconnect link) 3-wire single phase 2- or 3-wire single phase 3-wire single phase 3-wire wye, network meter (without voltage disconnect link) 2-8 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 2 Product Description Meter style1 Form Test Amps Class Elements Kh Type of service ZC53xxxxxxx ZC54xxxxxxx 12S 12S 30 50 200 320 2 2 1.0 1.0 3-wire wye, network meter 3-wire why, network meter 1 The fifth character in the style number identifies the amount of storage in EEPROM available. 2 = 1 KB of storage; 9 = 2 KB of storage. 30 November 2006 2-9 3UHOLPLQDU\Contact Elster Electricity for information 2 Product Description REX Meter Technical Manual Physical Dimensions The REX meter fits Forms 1S, 2S, 3S, 4S, and 12S. See Figure 2-5 for an illustration of a 2S meter and its dimensions. Figure 2-5. Form 2S meter and dimensions in inches [millimeters], front and side view1 6.95
[177]
Meter nameplate 6.27
[159]
1.33
[34]
0.75
[19]
4.45
[113]
1 Dimensions are provided for reference only. Do not use for construction. If exact dimensions are required, contact Elster Electricity. 2-10 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 3 Operating Instructions 3 Operating Instructions Indicators and Controls LCD The REX meter liquid crystal display (LCD) displays meter data and status information. Figure 3-1 shows the dimensions of the LCD. Figure 3-1. LCD dimensions in inches [millimeters]
1.97
[50]
1.81
[46]
0.2
[5.2]
0.08
[1.9]
0.39
[9.9] 0.69
[17.5]
0.85
[21.5]
Viewing area As shown in Figure 3-2, the LCD is divided into different display regions. 30 November 2006 3-1 3UHOLPLQDU\Contact Elster Electricity for information 3 Operating Instructions Figure 3-2. LCD regions Display quantity REX Meter Technical Manual Rate identifier Power/energy unit identifier Real energy indicators Display Quantity. This 6-digit display quantity on the LCD shows either metered quantities or other displayable information, depending upon how the REX meter was programmed either at the factory or using MAS. See Appendix B, Display, for more information. The display quantity digits are used to display the following:
LCD segment test (all display segments turned on) operational errors and status kWh and kW values When displaying energy values, the LCD can be configured to display 4, 5, or 6 digits. The REX meter displays leading zeros if the measured energy value has fewer digits than the number for which it is programmed. Real Energy Indicators. The real energy indicators pulse at a rate proportional to kWh consumption. The center square indicator pulses to indicate pulses of Kh. Each square indicator pulse (turns on and off) indicates 1 Kh. A single transition (on-to-off or off-to-on) indicates Kh. The arrows toggle for each Ke. This means that a single transition of an arrow pulse (off-to-on or on-to-off) represents Ke (see Table 2-1 for a list of Ke based on meter form). The left arrow indicates energy being received, and the right arrow indicates energy being delivered. 3-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Figure 3-3. Real energy indicators 3 Operating Instructions Received energy arrow Kh pulse indicator Delivered energy arrow Power/Energy Unit Identifier. The power/energy unit identifier is used to indicate that the number displayed on the meters LCD is either a demand or an energy value. When the value in the display quantity is a demand quantity, kW is displayed on the LCD, as shown in Figure 3-4. When the value in the display quantity is an energy quantity, kWh is displayed on the LCD, as shown in Figure 3-5. Figure 3-4. LCD displaying a sample demand value for TOU rate D Figure 3-5. LCD displaying a sample 5-digit energy value for TOU rate C Operating Mode The normal operation of the REX meter is to process and store metering data while the LCD scrolls through its display list. While operating, the test LED (see Figure 4-1) transmits test pulses proportional to metered energy. Each pulse represents one Kh of energy. See Optical Pulse Outputs on page 4-1 for more information. 30 November 2006 3-3 3UHOLPLQDU\Contact Elster Electricity for information 3 Operating Instructions REX Meter Technical Manual Resetting the REX Meter The LCD test (all 8s) will always display for 2 seconds immediately after power is connected to the REX meter or after a power restoration from a power failure. After the initial LCD test, the display will then scroll through all programmed displayable items before beginning the display cycle again with the first displayable item. The meter performs a self test at power restoration and once every 24 hours to make sure it is operating correctly. The self test ensures that the REX meter is functioning properly and that its displayed quantities are accurate. See Meter Self Test on page 5-1 for more information on self tests, errors, and statuses. When using the optical port to issue commands to the REX meter, the optical password must be used. The optical password can be specified when the REX meter is ordered. Additionally, the optical password can be changed using Elster Electricity meter support software. Using the optical port requires removing the meter cover and placing an optical probe onto the optical port that is molded onto the face of the meters inner housing. Demand Reset A demand reset can be performed in one of two ways:
issuing a command over the optical port issuing a command over the network When received over the network, the command is typically received before the demand reset date and schedules the demand reset to occur at the next midnight crossing. The meter can also be instructed to perform the demand reset immediately. Regardless of how the demand was reset, the meter does the following when resetting the demand:
copies the current billing data to the demand reset data area increments the demand reset count clears the status flag indicating the demand threshold was exceeded resets the maximum demand to zero Demand reset data area. In all demand reset occurrences, the meter copies the present billing data and stores it in the demand reset data area. This data is referred to as previous billing data because its general purpose is to preserve the data as one billing period ends and the next billing period begins. The meter stores only one copy of the previous billing data. The next demand reset overwrites whatever is currently stored as the previous billing data. 3-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 3 Operating Instructions Clear Billing Data This procedure copies the current billing data to the demand reset data area and then zeros the REX meters current billing register. The demand reset data area copy can be read by MAS. The clear current billing data is performed immediately when the REX meter receives the command over the 900 MHz network. Clear Data This procedure is used in the meter shop before installing the meter in the field. Using Metercat support software and an optical probe placed on the optical port, the command does the following:
clears current and previous billing data clears rates and rate overrides clears the 32-day calendar clears node scan responses clears LAN registration and status information clears load profiling data clears the power fail data save area resets kWh DEL and kWh REC lines on the option header resets the demand threshold relay closes the service control switch, if installed 30 November 2006 3-5 3UHOLPLQDU\Contact Elster Electricity for information 3 Operating Instructions Reading the REX Meter The REX meter can be read two ways:
REX Meter Technical Manual visually using the LCD remotely using the 900 MHz radio and the Elster Electricity AMR system For more details on the information that can be read on the LCD, see Appendix B, Display. Table 3-1 shows the information that can be obtained from the REX meter using the 900 MHz radio. Table 3-1. Information read from the REX meter using the radio Category Energy Demand Counters Status flags Error flags Items
kWh energy for up to 4 rates of the selected metered quantity
Total kWh received
Total kWh energy of the selected metered quantity (for REX meter firmware releases 2.0 and higher) Demand for up to 2 quantities where each quantity may be one of the following:
Total kW
kW for a specific rate In firmware release 1.0, demand data is read in the format of 4.2 (xxxx.xx). In firmware release 2.0 and higher, demand data is read in the format of 3.3 (xxx.xxx).
Number of demand resets
Number of power outages Each counter rolls over after 255 events have occurred.
Demand threshold exceeded since last demand reset
Meter is scheduled to perform a demand reset at the next midnight crossing
ROM checksum error
Power fail data save error
General configuration error
Table CRC error
Improper meter engine operation error Line voltage per phase rms voltage at the time of the meter read 3-6 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 4 Outputs 4 Outputs Optical Pulse Outputs Figure 4-1. Test LED location The REX meter contains a light emitting diode (called the test LED) on the face of the meter, as shown in Figure 4-1. The test LED emits a pulse output that can be used to test the REX meter in the shop or in the field without removing the meter from service or breaking the seal. The source for the optical pulse output is kWh of the metered quantity (see Metered Energy on page 2-3). The Kh is equal to 1.0 Wh per pulse. Note:
If the metered quantity is kWh net, the test LED output is kWh delivered. Meter nameplate Test LED 30 November 2006 4-1 3UHOLPLQDU\Contact Elster Electricity for information 4 Outputs REX Meter Technical Manual 4-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 5 Testing 5 Testing Meter Self Test REX meters are factory calibrated and tested to provide years of trouble-free service. No field calibrations or adjustments are required to ensure accurate operation of the meter. It is normal, however, to test installed REX meters periodically to ensure accurate billing. Testing procedures are the same regardless of the type of meter being tested. Additionally, the REX meter performs a self test every 24 hours and after any power restoration to determine if it is operating properly. The self test ensures that the REX meter is functioning properly and its displayed quantities are accurate. Any errors encountered will be displayed on the LCD. The self test incorporates a series of electronic analyses verifying many aspects of the REX meter. After any power restoration, all of the LCD segments will be turned on briefly before beginning the display sequence. The following is a listing of the specific tests performed during a self test:
verification of the configuration data and checksums verification of normal microcontroller function Error and Status Codes Error codes indicate a problem exists with the meter that may be affecting billing data. Elster Electricity does not recommend operating the REX meter when it is displaying an error code. Status codes indicate the present operating conditions; status codes do not indicate a problem. Error codes. Error codes are displayed on the LCD by an E and a 5-digit code. The code indicates the specific condition affecting the meter operation. See Figure 5-1 for a sample error code displayed on the meter LCD. Table 5-1 describes the different error conditions and their associated codes. Error codes are appended to the display list automatically when the condition causing the error code exists. Error codes can be displayed in combination
(E00101, for example), indicating that more than one error condition has been detected. In most cases, the meter will need to be returned to the factory for repair or replacement. 30 November 2006 5-1 3UHOLPLQDU\Contact Elster Electricity for information 5 Testing Figure 5-1. Sample error code displayed on the LCD REX Meter Technical Manual Table 5-1. Error conditions and codes Condition ROM checksum error Improper meter engine operation error EEPROM write error Table CRC error Configuration error Power fail data save error Code E E E E E E 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 E00000: ROM checksum error. This code indicates a problem with the meters program. If this code is displayed on the LCD, the REX meter should be returned to the factory for repair or replacement. E00001: improper meter engine error. This code indicates that the meter engine program may be corrupt or is not executing correctly. This error condition is typically triggered when the microcontroller fails to reinitialize the meter engine. If the code is displayed on the LCD, the REX meter should be returned to the factory for repair or replacement. E00010: EEPROM write error. This code indicates the meter had a problem storing meter data in its nonvolatile EEPROM. The REX meter should be returned to the factory for repair or replacement. E00100: table CRC error. This code indicates a possible error in the REX meters programming. Depending on which area of the meter is affected, billing data may not be reliably accumulated while this error condition exists. The REX meter should be returned to the factory for repair or replacement. E01000: configuration error. This code indicates a problem with the meters configuration. If the error continues after reprogramming, the meter should be returned to the factory for repair or replacement. E10000: power fail data save error. This code indicates that the data saved in nonvolatile EEPROM during a power failure may be invalid. This error will be displayed when power is restored to the meter, and a self check has discovered an error with the EEPROM data after a power fail data save. The REX meter should be returned to the factory for repair or replacement. 5-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 5 Testing Status codes. The REX meter displays status codes as an indication of the operational status of the meter. Unlike error codes, the status code does not indicate a problem with the REX meter. See Figure 5-2 for a sample status code displayed on the meter LCD. Table 5-2 describes the different conditions and their codes. Status codes are appended to the display list if both of the following items are valid:
the condition causing the status code exists status codes have been selected as a display item Status codes are indicated on the LCD by an F followed by a 5-digit numerical code indicating the specific condition that has occurred. Status codes can be displayed in combination (F01010, for example), indicating that one or more status conditions have been detected. Figure 5-2. Sample status code displayed on the LCD Table 5-2. Status conditions and codes Condition No load side voltage when service control switch is closed1 Demand threshold exceeded Code F F F F 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 Load side voltage present when service control switch is open1 Demand reset scheduled Service control switch open1 0 1 For more information, see the REX Meter Service Control Switch product guide (PG42-1007A or later). 0 0 0 F F10000: No load side voltage when service control switch is closed. This code indicates that there is no load side voltage present when the service control switch is supposedly closed. This code can indicate a malfunction with the service control switch. If this status code is displayed, contact Elster Electricity. F01000: Demand threshold exceeded. This code indicates that the demand has exceeded the programmed demand threshold. It is displayed once the demand threshold has been exceeded and is cleared by a demand reset, clear billing data, or clear data command. 30 November 2006 5-3 3UHOLPLQDU\Contact Elster Electricity for information 5 Testing REX Meter Technical Manual F00100: Load side voltage present when service control switch is open. This code indicates that there is load side voltage present when the service control switch is open. This code can indicate that one of the following conditions exist:
a malfunction occurred in the service control switch the load side is receiving voltage from a different power supply (for example, a gas-powered generator) If this status code is displayed, follow your utilitys procedures for restoring power when power is being supplied to the load side by a different source. Additionally, the meter can send an exception message to the EnergyAxis System service (MAS) when this condition occurs. The code remains on the display for as long as the condition exists. When the load side voltage is removed, the code is cleared from the display. The REX meter records that the event occurred since the demand reset, and this latched record can be read from the meter but cannot be displayed on the LCD. F00010: Demand reset scheduled. This code indicates that the meter has been scheduled to perform a demand reset at the next midnight crossing. This code is displayed when it receives a command to perform a demand reset from the network. The code remains in the display list until the next midnight crossing
(the time at which the meter performs a demand reset). See Demand Reset on page 3-4 for more information on demand resets. F00001: Service control switch open This code indicates that the service control switch is open. The service control switch can be opened when one of the following conditions exist:
the REX meter has received a command to disconnect power the demand threshold was exceeded and the meter is configured to open the switch when demand threshold is exceeded This code is displayed when the service control switch is opens and is cleared when the service control switch is closed. 5-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Meter Shop Testing 5 Testing Test Equipment Meter shops develop testing configurations specific to their own needs. The following is a list of standard test equipment that can be useful when testing a REX meter:
stable mounting assembly for the REX meter to be temporarily installed to ensure proper orientation and allow the necessary voltage and current connections to be made reliable power supply with at least the following characteristics:
provides voltage source for energizing the meter at its rated voltage provides unity power factor supplies lagging power factor of 60 for 0.5 PF testing reference Wh standard phantom load device or other loading circuit that has the current capacity ranges suitable for the desired test amperes control equipment for counting and timing the pulse output precision voltage and current transformers voltmeters, ammeters, phase angle meters, power factor meters, and any other measuring equipment at least one of the following:
an infrared pick-up head for detecting the Kh pulses of the test LED
(recommended) a reflective pick-up assembly for detecting the pulse indicators on the meter LCD 30 November 2006 5-5 3UHOLPLQDU\Contact Elster Electricity for information 5 Testing REX Meter Technical Manual Test Setup Before testing the REX meter, check the nameplate for the following:
test amperes appropriate operating voltage range meter Kh General test setup. Use only authorized utility procedures and proper test procedures to test metering equipment. Dangerous voltages are present. Equipment damage, personal injury, or death can result if safety precautions are not followed. The following general procedure should be used to create a test location for the REX meter:
1. Temporarily install the meter in a mounting device that will hold it in the proper operating position. 2. Place the test standard measuring device and precision voltage and current transformers (as required) in series with the meter being tested. If voltage transformers are not required, then the voltages of the meter and the standard should be in parallel. 3. Connect the control equipment used for switching the voltage to the test standard device and for counting the standards output pulses. 4. Apply the rated current and voltage to the terminals of the meter. After applying the voltages and currents, one of the following should be performed:
Align the reflective pick-up assembly over the appropriate pulse indicator on the meter LCD, just slightly off of perpendicular with the meter cover. This will minimize reflections from the cover face. Position the infrared pick-up head over the test LED to detect the pulse output. Alternatively, the infrared pick-up head could be connected to a test pulse adapter, and that adapter can be positioned over the test LED on the meter (recommended). See Figure 5-3 for the location of the test LED on the REX meter. 5-6 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Figure 5-3. Location of the test LED pulse output 5 Testing Meter nameplate Test LED Formulas Used in Testing When testing the REX meter, manual calculations may be necessary to verify meter quantities. Table 5-3 shows the naming conventions used to indicate variable quantities in these calculations. Table 5-3. Variables used in manual calculations Variable Represents CTR Khmeter Khstd kW P p t Current transformer ratio Wh test constant of the meter (watthours per pulse-period) Wh constant of reference standard (watthours per pulse-period) Power in kilowatts Number of pulses of the square indicator on the LCD or pulses from the test LED, where each flash or pulse is 1 Khmeter. Number of pulses of the reference standard Time (in minutes) VTR Voltage transformer ratio 30 November 2006 5-7 3UHOLPLQDU\Contact Elster Electricity for information 5 Testing REX Meter Technical Manual Watthour constant. For transformer rated meters, the Kh value is called the secondary Kh (Khsec) since the transformer ratios are not included. When instrument transformers are included, then Kh is called the primary Kh (Khpri) and is calculated with the following formula:
Kh pri
Kh sec CTR VTR A REX meter that is being used with 400:5 current transformers would yield the following Khpri value:
Khpri
1.0 Wh pulse 400 5
80 Wh pulse Calculating meter accuracy. Meter accuracy (percentage registration) can be calculated by comparing the meter pulse rate to the standard pulse rate and by using the following formula:
Accuracy
100 Kh P(
p(
Kh meter
) std
) Determining the power. The approximate power of the meter load in kilowatts during a time period can be obtained by measuring the time it takes to receive multiple test pulses (P). The test pulses can be counted from the test LED or the Kh pulse indicator on the meter LCD. The approximate power may then be calculated using the following formula:
kW KP t h 1000 60 Note:
If the primary load on a transformer rated meter is to be calculated, the kW value obtained from the equation shown above must be multiplied by the CTR and VTR. Meter Testing Since no field adjustments are required for the REX meter, meter testing is primarily done to ensure operation within factory specifications. This is normally done by simply checking the meter calibration. For precise test results, meters should be tested at the same temperature as the testing equipment. Ideally, this will be at 72 F (22 C). Using the standard Kh of 1.0 Wh/pulse, the number of pulses per minute that the REX meter produces at rated voltage and test current depends on the meter form, as shown in Table 5-4. Table 5-4. Kh pulses per minute based on meter form Form 1S 2S, 200 A 2S, 320 A 3S and 4S 3S and 4S Test voltage Test current 120 V 240 V 240 V 120 V 240 V 30 A 30 A 50 A 2.5 A 2.5 A Kh pulses per minute 60 Wh/minute 120 Wh/minute 200 Wh/minute 5 Wh/minute 10 Wh/minute 5-8 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 5 Testing Table 5-5. Watthour test points Form Test voltage Test current 12S, 200 A 120 V 12S, 320 A 120 V 30 A 50 A Kh pulses per minute 120 Wh/minute 200 Wh/minute Voltage should be applied to the meter for at least 10 seconds before measuring, allowing the power supply circuitry to stabilize. Watthour Testing To maintain compatibility between procedures for testing electronic and electromechanical meters, it is recommended that the REX meter be tested at the standard test points. These test points are described in Table 5-5. Test point Definition Full load Light load 100% of the nameplate test amperes, test voltage, and rated frequency at unity power factor 10% of the nameplate test amperes, test voltage, and rated frequency at unity power factory Lagging power factor 100% of the nameplate test amperes, test voltage, and rated frequency at 0.5 lagging power factor (current lagging voltage by 60 phase angle) Whereas electromechanical meters have adjustments to calibrate the meter at all three test points, the REX meter is calibrated in the factory. Elster Electricity provides the factory calibration data in a report. To test the REX meter at the standard test points, the following procedure should be used:
1. Verify the meter calibration at full load using the formula for calculating meter accuracy. See Calculating meter accuracy on page 5-8 to determine the percent accuracy. 2. Verify the meter calibration at light load using the same formula in step 1. 3. Verify the calibration of the meter at full load with lagging power factor using the same formula in step 1. 4. Check for creeping at the rated voltage level with no current. The meter must produce one full Kh pulse within 10 minutes to be considered creeping, with creep being defined as continuous output pulses from the meter with normal operating voltage but the load terminals open circuited. 30 November 2006 5-9 3UHOLPLQDU\Contact Elster Electricity for information 5 Testing Installation Site Testing REX Meter Technical Manual Since no adjustments are required for the REX meter, the main reason to test a meter is to make sure it is operating within factory specifications. Typically, all that needs to be done is to check the meter calibration. Accuracy Tests Accuracy tests confirm that the kWh readings meet calibration standards. The method of manually counting pulses requires a stopwatch. To count pulses manually, the following procedure should be used:
1. Place a known load on the meter. 2. Start the stopwatch when the LCD Kh pulse indicator turns off and start counting the number of pulses made by the indicator. Be sure to count each time the Kh pulse indicator (square indicator) turns off. 3. After a sufficient time to account for various response times, stop the stopwatch when the LCD Kh pulse indicator turns off. Record both the time on the stopwatch and the number of pulses counted. 4. Remove the load from the meter. 5. Calculate the expected number of pulses using the following formula:
calculated value pulse
kW K t h 1000 60 Note:
Time is measured in minutes. 6. Verify that the calculated pulse value matches the observed pulse count. This indicates that the meter is performing accurately. 7. Calculate the kWh using this formula:
calculated kWh K h
calculated 1000 pulse value The calculated kWh may not be exactly equal to the observed kWh. The time the meter was energized with the load applied and the time between starting and stopping the stopwatch can vary the calculations. This is normal and does not necessarily reflect inaccurate measurements. 8. Verify that the calculated kWh is equal to the change in kWh reported on the REX LCD. This indicates that the meter is calculating kWh accurately. 5-10 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual 6 Installation and Removal 6 Installation and Removal Preliminary Inspection Circuit-closing devices must be used on current transformer secondaries. This applies to Form 3S and 4S meters. Dangerous currents and voltages are present if secondaries are open-circuited. Equipment damage, personal injury, or death can result if circuit-closing devices are not used. The REX meter is calibrated and tested at the factory and is ready for installation. Follow proper installation and removal procedures for personal safety and protection of the meter. Before installing and applying power to the REX meter, Elster Electricity recommends a quick inspection of the meter. Check for any of the following items:
missing or broken parts missing or broken wiring bent or cracked components evidence of overheating Also, check the nameplate to make sure the meter is appropriate for the service. Physical damage to the outside of the REX meter could indicate potential electronic damage to the inside of the meter. Do not connect power to a meter that is suspected of having internal damage. Contact your local Elster Electricity representative if you suspect your meter may be damaged. 30 November 2006 6-1 3UHOLPLQDU\Contact Elster Electricity for information 6 Installation and Removal Placing the Meter into Service REX Meter Technical Manual See Appendix D, Wiring Diagrams, for illustrations of both internal and connection wiring diagrams. Make sure to install the correct meter for the service type, maximum current, and capacity required. Installing mismatched meters can damage equipment. Always verify that the maximum meter voltage and current ratings are equal to or greater than the maximum service voltage and current. If a REX meter is installed in a meter shop and a collector is powered at the same time, the REX meter may have registered to the collector. Before removing the REX meter from the meter shop, unregister the REX meter from the collector
(see Clear Data on page 3-5). Installing the REX Meter Use authorized utility procedures to install and service metering equipment. Dangerous voltages are present. Equipment damage, personal injury, or death can result if safety precautions are not followed. To install the REX meter effectively and safely, follow this procedure:
1. Align the meter blades and meter base socket jaws to the service socket. 2. Grasp each meter side and push it into the socket until the meter is firmly in place. If the meter resists sliding into place, rock the meter up and down while pushing forward. 3. Once firmly in place, power can be applied to the meter. 6-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Initial Setup 6 Installation and Removal After installing and powering the REX meter, verify the following:
If there is a load, the Kh pulse indicator on the LCD is flashing, and the arrows indicate the correct energy flow direction. Required meter seals are in place. Any information (such as location of the meter) has been recorded. If the meter is not working correctly after it has been installed, then check for improper installation or wiring. If the installation and wiring are correct, then check these other areas:
the meter installation matches the meter nameplate the correct type of REX meter is installed in the existing service no evidence of mechanical or electrical damage to either the meter or the installation location the service voltage falls within the operating range as indicated on the nameplate the seals are not broken A broken seal could be an indication of tampering with the REX meter installation. 30 November 2006 6-3 3UHOLPLQDU\Contact Elster Electricity for information 6 Installation and Removal Removing the Meter from Service Use caution when removing the REX meter from service. REX Meter Technical Manual Use authorized utility procedures to remove metering equipment. Dangerous voltages are present, equipment damage, personal injury, or death can result if safety procedures are not followed. When the meter is removed from the field, the meter registration status should be cleared before installing the meter in a new location (see Clear Data on page 3-5). Removing the REX Meter Circuit-closing devices must be used on current transformer secondaries. This applies to Form 3S and 4S meters. Dangerous currents and voltages are present if secondaries are open-circuited. Equipment damage, personal injury, or death can result if circuit-closing devices are not used. If it becomes necessary to remove a REX meter from service, use the following procedure:
1. Before disconnecting the meter, make sure that the existing meter data has been read from the display. 2. Remove the voltage and disconnect the current circuits. 3. Break the seal holding the REX meter in place. 4. Remove the seal and collar (or other security device). 5. Grasp each side of the meter and gently pull it from the socket. If the meter resists removal, gently rock the meter up and down while pulling back. 6-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Disassembling and Reassembling the Meter The REX meter can be disassembled. Figure 6-1 shows a disassembled meter and the various components. 6 Installation and Removal Do not disassemble the meter or remove the electronic components with power present. Doing so could result in exposure to dangerous voltages resulting in equipment damage, personal injury, or death. Figure 6-1. Disassembled REX meter Meter base Inner housing Main circuit board with RF module Nameplate Meter cover Removing the Meter Cover To disassemble the REX meter, first remove the meter cover. To remove the meter cover:
1. Remove the T-seal or wire seal from the back of the meter. 2. While holding the bottom of the meter base, grasp the front of the meter cover and turn counterclockwise until it stops. 3. Pull the meter cover to reveal the inner housing. Removing the Inner Housing The meter cover must be off before the inner housing can be removed. To remove the inner housing:
1. Place the meter on a stable, flat surface. 2. While pressing the four release tabs simultaneously (see Figure 6-2), lift the inner housing to reveal the electronic components and circuit board support frame. 30 November 2006 6-5 3UHOLPLQDU\Contact Elster Electricity for information 6 Installation and Removal Figure 6-2. Release tabs REX Meter Technical Manual Release tab
(hidden) Release tab
(hidden) Release tab Release tab Removing the Electronic Components The electronic components consist of the following parts:
main circuit board any installed option boards Figure 6-3. Electronic components and connectors Top option board slot LCD support 900 MHz radio Radio antenna Lower option board slot Middle option board slot Main circuit board 6-6 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual 6 Installation and Removal Removing the Main Circuit Board. Care must be taken to prevent electrostatic discharge damage when handling any of the electronic assemblies. The inner housing must be removed to reach the main circuit board. To remove the electronic assembly:
1. Disconnect the current sensor cable (not shown in Figure 6-3) from the 2. main circuit board. If an option board is installed, disconnect the ribbon connector from the main circuit board (not shown in Figure 6-3). 3. Facing the meter LCD, pull the main circuit board towards you and away from the circuit board support frame. Reassembling the Meter The REX meter contains sensitive electronic equipment. Use caution when applying pressure on the main circuit board or any option boards that may be installed. If the main circuit board or option board does not easily snap into place, remove the main circuit board or option board and try again. Applying the incorrect amount of pressure can result in a damaged or broken main circuit board or option board. The REX meter can be reassembled by reversing the instructions for disassembling the meter as described above. When reassembling the main circuit board, be sure to push on the LCD support
(see Figure 6-3). Pushing on the main circuit board in other locations may result in damage to the electronic equipment on the main circuit board. 30 November 2006 6-7 3UHOLPLQDU\Contact Elster Electricity for information 6 Installation and Removal REX Meter Technical Manual 6-8 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual A Glossary A Glossary billing data The measured quantities recorded and stored by the meter for use in billing the consumer. May also be referred to as tariff data. del see delivered. delivered Used to specify the energy delivered (provided) to an electric service. demand The average power computed over a specific time. demand interval The time period over which demand is calculated. In the REX meter, the demand interval must be 15, 30, or 60 minutes. demand reset The act of resetting the present maximum demand to zero. demand threshold The present value of demand that, when reached, sets a warning flag. display quantity Any value available for display on the LCD. EEPROM Acronym for electrically erasable programmable read only memory. This memory retains all information even when electric power is removed from the circuit. energy Power measured over time. error code display The method by which the meter displays an error message which consists of E and numeric codes. Error codes indicate that a condition exists or has occurred that may be affecting billing data. IC see integrated circuit. integrated circuit Generally used to reference the meter circuit used in the REX meter for per phase voltage and current sampling plus energy measurements. Ke The smallest discrete amount of energy available within the meter. It is the value of a single pulse used between the meter engine and the microcontroller. Kh A meter constant representing the watthours per output pulse on the optical port or one flash of the LCD Kh indicator. Historically, Kh represents the energy equivalent to one revolution of an electromechanical meter. LCD see liquid crystal display. LCD test A display showing 8 in all the display areas and all identifiers on the LCD turned on. This confirms that all LCD segments are operating properly. LP see load profiling. line frequency The frequency of the AC voltage. Depending upon the country or region, the line frequency is either 50 Hz or 60 Hz. liquid crystal display The LCD displays metered quantities and other information about the REX meter. Display quantities are factory programmable. 07 April 2006 A-1 3UHOLPLQDU\Contact Elster Electricity for information A Glossary REX Meter Technical Manual load profiling Load profiling records energy usage per a specific time interval while the meter is energized. maximum demand The highest demand calculated during any demand interval over a billing period. meter base The part of the meter containing all of the following components:
base housing current sensing transformer current and voltage blades hanger microcontroller A single IC that contains the following components:
main processor RAM ROM clock I/O control unit optical port A photo-transistor and an test LED on the face of the meter that is used to transfer data between a computer and the meter via pulses of light. previous billing data A copy of the billing data stored at the time of the most recent demand reset. rec see received. received Used to specify the energy received by the utility at an electric service. tariff data See billing data. TOU see time-of-use. timekeeping The ability of the meter to keep a real time clock, including date and time. The REX meter obtains time from the network. time-of-use A billing rate that records energy usage and demand data in separate registers to indicate the time of day that the energy was consumed. A-2 07 April 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual B Display B Display Display Format Figure B-1. LCD regions The REX meter uses a 6-digit LCD located on the front of the meter. As shown in Figure B-1, the LCD is divided into different display regions. See LCD on page 3-1 for more detailed descriptions of the LCD and its display regions. Display quantity Rate identifier Power/energy unit identifier Real energy indicators Table B-1. LCD regions Item Display quantity Shows the metered quantity or other displayable Description information. Four to six digits can be used to display kWh data. These digits are also used to report the following:
energy
demand
per phase voltage present indicators (Form 12S only)
error codes
status codes
time
network registration status When lit, indicates the appropriate TOU rate for the quantity displayed on the LCD or the current rate in conjunction with the current time. Rate identifier Power/energy unit identifier When lit, indicates the unit of measurement for the quantity displayed on the LCD. 30 November 2006 B-1 3UHOLPLQDU\Contact Elster Electricity for information B Display REX Meter Technical Manual Item Real energy indicators Description Arrows indicate the direction of energy flow; square (Kh pulse indicator) indicates the proportional rate of consumption. Display Items The same hold time is used for all items in the display list. Displayable items can be grouped into the following categories:
LCD test error codes and status codes current time and rate metered quantities received energy quantity per phase voltage present indication (Form 12S only) network registration status LCD Test When selected as a display item, the REX meter tests the display segments by lighting all the segments on the LCD as shown in Figure B-2. During the LCD test, the real energy arrows and the Kh pulse indicator operate normally and are not affected by the LCD test. Figure B-2. LCD test Note: After power restoration, the LCD test always displays all segments (including the real energy arrows and square indicator) even if the LCD test is not selected as a displayable item. Error Codes and Status Codes Error codes are appended to the display list automatically when the condition exists. Status codes are appended to the display list if both of the following items are valid:
the condition causing the status code exists status codes have been selected as a display item B-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual B Display Error and status codes are removed from the display list automatically when the condition clears. See Error and Status Codes on page 5-1 for more information. Current Time and Rate When selected as a display item, the REX meter displays the current time and the current rate as shown in Figure B-3. Note that the time is displayed in 24-
hour format For example, 8:26 AM is displayed as 08.26, and 8:26 PM is displayed as 20.26. Figure B-3. Sample display of the REX meters current time and rate Metered Quantities The REX meter can display both energy and demand values. Energy Quantities. Energy values may be displayed with 4, 5, or 6 digits. If the quantity requires fewer digits, leading zeros are used (see Figure B-4). If TOU metering is being used, the meter can display the energy quantity for each rate. The rate identifier shows the appropriate rate for each quantity. Figure B-4. Sample 5-digit energy value for TOU rate C In addition, the REX meter can display the total energy value (see Figure B-5). 30 November 2006 B-3 3UHOLPLQDU\Contact Elster Electricity for information B Display Figure B-5. Sample 5-digit total energy value REX Meter Technical Manual Demand Quantities. The REX meter can display two demand values; where each demand can be total kW or kW for a specific rate. The following are valid demand configurations:
1 total demand value and the demand for 1 rate (for example, total demand and Rate C demand). 2 rates (for example, Rate A demand and Rate C demand). The rate identifier shows the appropriate rate for each quantity. Demand values are always displayed in the format of nnn.nn (see Figure B-6) regardless of how many numbers are used to display energy values. Figure B-6. Sample demand quantity for TOU rate D Received Energy Quantity In addition to displaying the selected metered quantity, the REX meter can also display the total received energy value. The received energy quantity can use up to 5 digits. The received energy quantity is always preceded by a minus sign, as shown in Figure B-7. B-4 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Figure B-7. Sample 5-digit received energy quantity B Display Per Phase Voltage Present Indicators For Form 12S meters, the display can indicate the status of phase A and phase C voltages. If phase A and phase C voltages are at or above 50 V, the display will indicate that both voltages are present (see Figure B-8). If the phase C voltage is not present (phase C is less than 50 V), the display will indicate that only phase A voltage is present (see Figure B-9). If phase A and phase C voltages are below 50 V, the display will indicate that neither voltage is present (see Figure B-10). 30 November 2006 B-5 3UHOLPLQDU\Contact Elster Electricity for information B Display Figure B-8. Both phase A and phase C voltages are present REX Meter Technical Manual Figure B-9. Phase C voltage is not present (phase C < 50 V) Figure B-10. Neither phase A nor phase C voltages are present (phase A and phase C < 50 V) Network Registration Status When selected as a display item, the REX meter displays the following information about its network registration:
the REX meter is registered with a collector the number of communication hops between the REX meter and the collector the four least significant digits of the collectors LAN ID See Figure B-11 for an example of the network registration status display. Note:
If the network registration status is selected as a display item but the REX meter is not registered with the collector, then the network registration status display item is skipped and is not shown on the LCD. B-6 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter Technical Manual Figure B-11. Sample network registration status sample display B Display Table B-2. Network registration status sample display description Code Description 2 r The number of communication hops between the REX meter and the collector. In the example, the 2 indicates that the REX meter communicates with the collector through one other REX meter. Indicates that the REX meter is registered with a collector. 2049 The last 4 digits of the collectors LAN ID.
In REX meter release 1.0, the last 4 digits are in hexadecimal format.
In REX meter releases 2.0 and higner, the last 4 digits are in decimal format. 30 November 2006 B-7 3UHOLPLQDU\Contact Elster Electricity for information B Display REX Meter Technical Manual B-8 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual C Nameplate Information C Nameplate Information REX Meter Nameplate The REX meter nameplate provides important information about the meter. Figure C-1 is an illustration of the standard REX meter nameplate for transformer rated meters. Figure C-1. Sample standard nameplate (transformer rated) Pkh Mult. By VTR
:1 CTR
:5 SERIAL # 12 345 678 FCC ID: QZC-RX9A TYPE R 1S REX METER NAMEPLATE
*G012345678901234567*
*G012345678 *
CL20, 120 TO 240V, 3W, 60Hz FM 4S Watthour Meter Kh 1.0 TA 2.5 ZCC22000000 LAN ID: 255-1970110102 2551970110102 The following figures identify the different areas of the nameplate along with the information they convey. Transformer Rated Meter Information Figure C-2 shows the information application to transformer rated meters. The nameplate displays the multipliers for the meter. Note:
This section of the nameplate is not present for self-contained meters. 30 November 2006 C-1 3UHOLPLQDU\Contact Elster Electricity for information C Nameplate Information Figure C-2. Nameplate information for transformer rated meters REX Meter Technical Manual Primary Kh Voltage transformer ratio Pkh Mult. By VTR
:1 CTR
:5 External display multiplier Current transformer ratio Lower Portion The lower portion of the nameplate displays the serial number, barcode, form factor, and meter constants for the meter along with other information as shown in Figure C-3. Figure C-3. Sample lower portion of standard transformer rated nameplate (self contained is similar) Serial number FCC ID number Voltage range SERIAL # 12 345 678 FCC ID: QZC-RX9A TYPE R1S Manufacturer bar code Meter type Class rating ANSI form designation Watthours per test LED pulse REX METER NAMEPLATE
*G012345678901234567*
*G012345678 *
CL20, 120 TO 240V, 3W, 60Hz FM 4S Watthour Meter Kh 1.0 TA 2.5 ZCC22000000 Style number Test amperes LAN ID: 255-1970110102 2551970110102 Service Utility ID and LAN ID The utility ID is the same for all meters that are part of the same network. The LAN ID is unique for each meter. Utility ID LAN ID LA N ID : 25 5 -1 9 70 11 0 1 02 2551970110102 C-2 30 November 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual D Wiring Diagrams D Wiring Diagrams Internal Wiring Diagrams Form 1S PS Form 2S PS Form 3S PS Form 4S PS 2-wire Self contained 3-wire Self contained Alternate positions of movable potential terminal 2- or 3-wire Transformer-rated 3-wire Transformer-rated Form 12S PS 5 0 F 9 0 Alternate positions of movable potential terminal 2-wire Self contained 07 April 2006 D-1 3UHOLPLQDU\Contact Elster Electricity for information D Wiring Diagrams Installation Wiring Diagrams REX Meter Technical Manual 1 1 N N CIRCUIT CLOSING DEVICE 1 2 N L O A D Form 2S 1 phase, 3 wire selfcontained 3 0 G 1 1 Form 3S 1 phase, 2 wire 1 CT, no VTs 2 N 1 1 2 N 1 N 1 N 1 N 2 1 2 N N 1 L O A D Form 1S 1 0 E 0 2 1 phase, 2 wire selfcontained N 1 2 1 2 N CIRCUIT CLOSING DEVICE 1 0 E 0 2 1 N 2 1 2 N CIRCUIT CLOSING DEVICE 3 0 G 1 1 Form 3S 1 phase, 3 wire 1 CT, no VTs 3 0 G 1 1 Form 4S 1 Phase, 3 Wire 2 CTs, no VTs 1 0 E 0 2 Form 12S 2 phase, 3 wire wye selfcontained 1 2 N L O A D D-2 07 April 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual E Technical Specifications E Technical Specifications Absolute Maximums Voltage 288 VAC (Forms 1S, 2S, 3S, 4S) 144 VAC (Form 12S) Surge voltage withstand Test Performed ANSI C37.90.1 Oscillatory Fast transient ANSI 62.41 IEC 61000-4-4 Results 2.5 kV, 2500 strikes 5 kV, 2500 strikes 6 kV @ 1.2/50 s, 10 strikes 4 kV, 2.5 kHz repetitive burst for 1 minute ANSI C12.16 dielectric 2.5 kV, 60 Hz for 1 minute Current Continuous at 100 % of the meter maximum current Temporary (1 second) at 200 % of meter maximum current Operating Ranges Voltage Nameplate nominal range Form 1S and Form 12S 120 V Form 2S 240 V Form 3S and Form 4S 120 V to 240 V Operating range 96 V to 144 V 192 V to 288 V 96 V to 288 V Current Frequency 0 to maximum amperes Nominal 60 Hz 5 %
Temperature range
-40 C to +85 C inside meter cover Humidity range 0 % to 100 % noncondensing 07 April 2006 E-1 3UHOLPLQDU\Contact Elster Electricity for information E Technical Specifications Operating Characteristics REX Meter Technical Manual Power supply burden Less than 4 W Current burden Voltage burden 0.1 milliohms typical at +25 C 0.907 W at 120 V 1.138 W at 240 V Accuracy The REX meter meets ANSI C12.20 0.5 % accuracy class. General Performance Characteristics Starting current Form 1S and Form 3S Form 2S and Form 4S Form 12S Class 20 10 mA 5 mA N/A Class 200 100 mA 50 mA 50 mA Class 320 160 mA 80 mA 50 mA Startup delay Less than 2 seconds from power application to pulse accumulation Creep 0.000 A (no current) No more than 1 pulse measured per quantity, conforming to ANSI C12.1 requirements. Primary time base Relative time is maintained by a crystal; real time is provided via the 900 MHz network. E-2 07 April 2006 3UHOLPLQDU\Contact Elster Electricity for information REX Meter REX Meter Technical Manual Technical Manual Index Index A ANSI standards. see standards:ANSI C calibration constants. see EEPROM critical tier pricing. see TOU data:critical tier current sensors. see sensors:current D demand calculation: 2-4 interval: 2-4 maximum: 2-4 demand forgiveness: 2-4 dimensions. see REX meter:dimensions DSP. see meter engine E EEPROM and power failure: 2-3 calibration constants: 2-3 stored values: 2-3 theory of operation: 2-3 error codes: 5-1 E00000: 5-2 E00001: 5-2 E00010: 5-2 E00100: 5-2 E01000: 5-2 E10000: 5-2 I inner housing: 2-7 installation calibration: 6-1 preliminary inspection: 6-1 Sbase procedure: 6-2 verifying: 6-3 L LCD. see liquid crystal display LED. see test LED liquid crystal display: 3-1 display quantity: 3-2 powerenergy unit identifier: 3-3 real energy indicators: 3-2 load profiling: 2-5 interval: 2-6 M main circuit board: 2-8 meter accuracy: 5-8 meter base: 2-8 meter cover: 2-7 meter engine theory of operation: 2-3 metered quantities: 2-3 and load profiling: 2-6 microcontroller and meter engine pulses: 2-3 detecting power failure: 2-3 theory of operation: 2-3 N nameplate in verifying installation: 6-3 location of: 2-7 use in testing: 5-6 O option boards location of: 2-8 P physical components. see REX meter:physical components power fail: 2-3, 2-5 power supply powerenergy unit identifier. see theory of operation: 2-2 liquid crystal display:powerenergy unit identifer R real energy indicators. see liquid crystal display:real energy indicators removal Sbase procedure: 6-4 resistive dividers. see sensors:voltage REX meter accuracy: 1-3 adaptability: 1-3 30 November 2006 Index-1 3UHOLPLQDU\Contact Elster Electricity for information Index REX Meter Technical Manual benefits: 1-3 dimensions: 2-10 disassembled: 6-5 meter forms: 1-4 overview: 1-1 physical components: 2-6 reliability: 1-3 security: 1-3 S safety notices: 2-vii procedures: 2-vii S-base: 2-8 self test: 5-1 sensors current: 2-2 theory of operation: 2-2 voltage: 2-2 signal conversion: 2-3 socket connected. see S-base standards ANSI: 1-2 status codes: 5-3 F00010: 5-4 F01000: 5-3 T test equipment: 5-5 test LED: 3-3 location of: 4-1 pulse output: 4-1 testing accuracy: 5-10 calculations used in: 5-7 inservice meters: 5-10 setup: 5-6 to 5-8 watthour testing: 5-9 theory of operation: 2-2 to 2-3 EEPROM: 2-3 meter engine: 2-3 microcontroller: 2-3 power supply: 2-2 sensors: 2-2 TOU data critical tier: 2-5 switch point: 2-5 V voltage sensors. see sensors:voltage W warranty: 2-vi 3UHOLPLQDU\Contact Elster Electricity for information 3UHOLPLQDU\Contact Elster Electricity for information Elster Electricity, LLC Raleigh, North Carolina USA
+ 1800 338 5251 (US Technical Support)
+ 1800 257 9754 (US Sales Support)
+ 1 919 212 4800 (US Main)
+ 1 905 634 4895 (Canada Main) support@us.elster.com www.elsterelectricity.com 3UHOLPLQDU\Contact Elster Electricity for information
| frequency | equipment class | purpose | ||
|---|---|---|---|---|
| 1 | 2007-03-07 | 902.8 ~ 927.6 | DSS - Part 15 Spread Spectrum Transmitter | Original Equipment |
| app s | Applicant Information | |||||
|---|---|---|---|---|---|---|
| 1 | Effective |
2007-03-07
|
||||
| 1 | Applicant's complete, legal business name |
Elster Solutions, LLC
|
||||
| 1 | FCC Registration Number (FRN) |
0008634834
|
||||
| 1 | Physical Address |
208 S. Rogers Lane
|
||||
| 1 |
Raleigh, North Carolina 27610
|
|||||
| 1 |
United States
|
|||||
| app s | TCB Information | |||||
| 1 | TCB Application Email Address |
k******@emcc.de
|
||||
| 1 | TCB Scope |
A4: UNII devices & low power transmitters using spread spectrum techniques
|
||||
| app s | FCC ID | |||||
| 1 | Grantee Code |
QZC
|
||||
| 1 | Equipment Product Code |
RX9A
|
||||
| app s | Person at the applicant's address to receive grant or for contact | |||||
| 1 | Name |
J**** H********
|
||||
| 1 | Title |
Principal Engineer
|
||||
| 1 | Telephone Number |
919-2********
|
||||
| 1 | Fax Number |
919-2********
|
||||
| 1 |
j******@us.elster.com
|
|||||
| app s | Technical Contact | |||||
| n/a | ||||||
| app s | Non Technical Contact | |||||
| n/a | ||||||
| app s | Confidentiality (long or short term) | |||||
| 1 | Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | Yes | ||||
| 1 | Long-Term Confidentiality Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | No | ||||
| if no date is supplied, the release date will be set to 45 calendar days past the date of grant. | ||||||
| app s | Cognitive Radio & Software Defined Radio, Class, etc | |||||
| 1 | Is this application for software defined/cognitive radio authorization? | No | ||||
| 1 | Equipment Class | DSS - Part 15 Spread Spectrum Transmitter | ||||
| 1 | Description of product as it is marketed: (NOTE: This text will appear below the equipment class on the grant) | AUTOMATIC METER READING SYSTEM TRANSCEIVER | ||||
| 1 | Related OET KnowledgeDataBase Inquiry: Is there a KDB inquiry associated with this application? | No | ||||
| 1 | Modular Equipment Type | Does not apply | ||||
| 1 | Purpose / Application is for | Original Equipment | ||||
| 1 | Composite Equipment: Is the equipment in this application a composite device subject to an additional equipment authorization? | No | ||||
| 1 | Related Equipment: Is the equipment in this application part of a system that operates with, or is marketed with, another device that requires an equipment authorization? | No | ||||
| 1 | Grant Comments | Power output listed is peak conducted. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. | ||||
| 1 | Is there an equipment authorization waiver associated with this application? | No | ||||
| 1 | If there is an equipment authorization waiver associated with this application, has the associated waiver been approved and all information uploaded? | No | ||||
| app s | Test Firm Name and Contact Information | |||||
| 1 | Firm Name |
TUV Rheinland of North America
|
||||
| 1 | Name |
M**** M********
|
||||
| 1 | Telephone Number |
919-5******** Extension:
|
||||
| 1 | Fax Number |
919-5********
|
||||
| 1 |
m******@us.tuv.com
|
|||||
| Equipment Specifications | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
| 1 | 1 | 15C | 902.80000000 | 927.60000000 | 0.2360000 | 395KFID | |||||||||||||||||||||||||||||||||||
some individual PII (Personally Identifiable Information) available on the public forms may be redacted, original source may include additional details
This product uses the FCC Data API but is not endorsed or certified by the FCC