3UHOLPLQDU\ Contact Elster Electricity for information 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.
REX Meter Technical Manual REX Meter Technical Manual 3UHOLPLQDU\ Contents Contact Elster Electricity for information 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 . . . . . . . . . . . . . . . .
Contents 3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Inner Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Main Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Circuit Board Support Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Meter Base . . . . . . . . . . . .
REX Meter Technical Manual 3UHOLPLQDU\ Contents Contact Elster Electricity for information Reassembling the Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 A. Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 B. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents iv 3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 30 November 2006
REX Meter REX Meter Technical Manual FCC and Industry Canada Compliance 3UHOLPLQDU\ Technical Manual Contents Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Contents Disclaimer of Warranties and Limitation of Liability Technical Manual Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Safety Information Contents Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information Contents Revisions to This Document The REX Meter Technical Manual can be referred to by its document number: TM42–2210. 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.
REX Meter Technical Manual REX Meter Technical Manual 1 Introduction Contact Elster Electricity for information 1 The REX Meter 3UHOLPLQDU\ Introduction 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 1 Introduction 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.
3UHOLPLQDU\ REX Meter Technical Manual 1 Introduction Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 1 Introduction Features Meter Forms 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.
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual Product Description Contact2Elster Electricity for information 2 System Overview Product Description 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 2 Product Description Figure 2-2. REX meter block diagram (Form 12S meters) 16-pin header 20.48 MHz Optical port Phase A current Phase C current CT fref = 20.48 MHz Wh del Wh rec CT LCD Microcontroller SPI bus #1 Meter engine Phase A voltage Phase C voltage fref = 20.48 MHz Resistive divider Resistive divider SPI bus #2 900 MHz radio Tx data EEPROM Rx data 3.3 V power supply 3.3 V 6.4 V power supply 6.
3UHOLPLQDU\ REX Meter Technical Manual Product Description Contact2Elster Electricity for information 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 factoryprogrammed calibration constants. Microcontroller.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 2 Product Description ■ 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 kWhdelivered pulses for load profiling. Demand Calculation.
3UHOLPLQDU\ REX Meter Technical Manual Product Description Contact2Elster Electricity for information TOU Data. The REX meter stores the energy data for up to 4 rates.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 2 Product Description 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.
3UHOLPLQDU\ REX Meter Technical Manual Product Description Contact2Elster Electricity for information Figure 2-4. Exploded view of the REX meter Meter base Inner housing Main circuit board with RF module Circuit board support frame 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 2 Product Description 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.
3UHOLPLQDU\ REX Meter Technical Manual Product Description Contact2Elster Electricity for information Meter style1 Form Test Amps Class Elements Kh Type of service ZC53xxxxxxx 12S 30 200 2 1.0 3-wire wye, network meter ZC54xxxxxxx 12S 50 320 2 1.0 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 2 Product Description 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] 1.33 [34] 0.75 [19] 6.27 [159] Meter nameplate 4.45 [113] 1 2-10 Dimensions are provided for reference only. Do not use for construction.
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual 3 Operating Instructions Contact Elster Electricity for information 3 Indicators and Controls Operating Instructions 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 3 Operating Instructions Figure 3-2. LCD regions Display quantity 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.
3UHOLPLQDU\ REX Meter Technical Manual 3 Operating Instructions Contact Elster Electricity for information Figure 3-3. Real energy indicators 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 meter’s 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 3 Operating Instructions 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.
3UHOLPLQDU\ REX Meter Technical Manual 3 Operating Instructions Contact Elster Electricity for information Clear Billing Data This procedure copies the current billing data to the demand reset data area and then zeros the REX meter’s 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 3 Operating Instructions Reading the REX Meter The REX meter can be read two ways: ■ 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.
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual 4 Outputs Contact Elster Electricity for information 4 Optical Pulse Outputs Outputs 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.
3UHOLPLQDU\ REX Meter 4 Outputs 4-2 Technical Manual Contact Elster Electricity for information 30 November 2006
REX Meter REX Meter Technical Manual 5 Testing Contact Elster Electricity for information 5 Meter Self Test 3UHOLPLQDU\ Technical Manual Testing 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 5 Testing Figure 5-1. Sample error code displayed on the LCD Table 5-1. Error conditions and codes Condition Code ROM checksum error E 0 0 0 0 0 Improper meter engine operation error E 0 0 0 0 1 EEPROM write error E 0 0 0 1 0 Table CRC error E 0 0 1 0 0 Configuration error E 0 1 0 0 0 Power fail data save error E 1 0 0 0 0 E00000: ROM checksum error.
3UHOLPLQDU\ REX Meter Technical Manual 5 Testing Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 5 Testing 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.
3UHOLPLQDU\ REX Meter Technical Manual Meter Shop Testing 5 Testing Contact Elster Electricity for information Test Equipment Meter shops develop testing configurations specific to their own needs.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 5 Testing 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.
3UHOLPLQDU\ REX Meter Technical Manual 5 Testing Contact Elster Electricity for information Figure 5-3. Location of the test LED pulse output 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 5 Testing 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 = Khsec × CTR × VTR A REX meter that is being used with 400:5 current transformers would yield the following Khpri value: Kh pri = 1.
3UHOLPLQDU\ REX Meter Technical Manual 5 Testing Contact Elster Electricity for information Form Test voltage Test current Kh pulses per minute 12S, 200 A 120 V 30 A 120 Wh/minute 12S, 320 A 120 V 50 A 200 Wh/minute Voltage should be applied to the meter for at least 10 seconds before measuring, allowing the power supply circuitry to stabilize.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 5 Testing Installation Site Testing 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.
REX Meter REX Meter Technical Manual 6 Installation and Removal Contact Elster Electricity for information 6 Preliminary Inspection 3UHOLPLQDU\ Technical Manual Installation and Removal 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 6 Installation and Removal Placing the Meter into Service 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.
3UHOLPLQDU\ REX Meter Technical Manual Initial Setup 6 Installation and Removal Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 6 Installation and Removal Removing the Meter from Service Use caution when removing the REX meter from service. 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.
3UHOLPLQDU\ REX Meter Technical Manual Disassembling and Reassembling the Meter 6 Installation and Removal Contact Elster Electricity for information The REX meter can be disassembled. Figure 6-1 shows a disassembled meter and the various components. 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information 6 Installation and Removal Figure 6-2. Release tabs 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.
3UHOLPLQDU\ REX Meter Technical Manual 6 Installation and Removal Contact Elster Electricity for information 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 main circuit board. 2.
3UHOLPLQDU\ REX Meter 6 Installation and Removal 6-8 Technical Manual Contact Elster Electricity for information 30 November 2006
REX Meter Technical Manual REX Meter Technical Manual 3UHOLPLQDU\ A Glossary Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information A Glossary 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.
REX Meter Technical Manual REX Meter Technical Manual B Display Contact Elster Electricity for information B Display Format 3UHOLPLQDU\ Display 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. Figure B-1. LCD regions Display quantity Power/energy unit identifier Rate identifier Real energy indicators Table B-1.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information B Display Display Items Item Description Real energy indicators Arrows indicate the direction of energy flow; square (Kh pulse indicator) indicates the proportional rate of consumption. The same hold time is used for all items in the display list.
3UHOLPLQDU\ REX Meter Technical Manual B Display Contact Elster Electricity for information 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 24hour format For example, 8:26 AM is displayed as 08.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information B Display Figure B-5. Sample 5-digit total energy value 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).
3UHOLPLQDU\ REX Meter Technical Manual B Display Contact Elster Electricity for information Figure B-7. Sample 5-digit received energy quantity Per Phase Voltage Present Indicators For Form 12S meters, the display can indicate the status of phase A and phase C voltages. 30 November 2006 ■ 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).
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information B Display Figure B-8. Both phase A and phase C voltages are present Figure B-9. Phase C voltage is not present (phase C < 50 V) Figure B-10.
3UHOLPLQDU\ REX Meter Technical Manual B Display Contact Elster Electricity for information Figure B-11. Sample network registration status sample display Table B-2. Network registration status sample display description 30 November 2006 Code Description 2 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.
3UHOLPLQDU\ REX Meter B Display B-8 Technical Manual Contact Elster Electricity for information 30 November 2006
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual C Nameplate Information Contact Elster Electricity for information C REX Meter Nameplate Nameplate Information 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.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information C Nameplate Information Figure C-2. Nameplate information for transformer rated meters Voltage transformer ratio Primary Kh Mult. By Pkh :1 CTR VTR :5 Current transformer ratio External display multiplier 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.
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual D Wiring Diagrams Contact Elster Electricity for information D Wiring Diagrams Internal Wiring Diagrams Form 1S PS Form 2S PS Form 3S Form 4S PS PS Alternate positions of movable potential terminal 2-wire Self contained 3-wire Self contained 2- or 3-wire Transformer-rated 3-wire Transformer-rated Form 12S 09F05 PS Alternate positions of movable potential terminal 2-wire Self contained 07 April 2006 D- 1
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information D Wiring Diagrams Installation Wiring Diagrams 1 1 1 N 1 1 N 2 N N 1 20E01 Form 1S 1 phase, 2 wire self–contained 1 L 2 O A ND L O A D 1 N N Form 3S 1 phase, 2 wire 1 CT, no VTs 1 2 N 2 1 2 1 2 N N N 1 L 2 O A ND Form 3S 1 phase, 3 wire 1 CT, no VTs 11G03 CIRCUIT CLOSING DEVICE CIRCUIT CLOSING DEVICE 11G03 Form 2S 1 phase, 3 wire self–contained 1 2 2 D-2 CIRCUIT CLOSING DEVICE Form 4S 1
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual E Technical Specifications Contact Elster Electricity for information E Technical Specifications Absolute Maximums Voltage 288 VAC (Forms 1S, 2S, 3S, 4S) 144 VAC (Form 12S) Surge voltage withstand Test Performed Results ANSI C37.90.1 Oscillatory 2.5 kV, 2500 strikes Fast transient 5 kV, 2500 strikes ANSI 62.41 6 kV @ 1.2/50 µs, 10 strikes IEC 61000-4-4 4 kV, 2.5 kHz repetitive burst for 1 minute ANSI C12.
3UHOLPLQDU\ REX Meter Technical Manual Contact Elster Electricity for information E Technical Specifications Operating Characteristics Power supply burden Less than 4 W Current burden 0.1 milliohms typical at +25 °C Voltage burden 0.907 W at 120 V 1.138 W at 240 V The REX meter meets ANSI C12.20 0.5 % accuracy class.
REX Meter 3UHOLPLQDU\ Technical Manual REX Meter Technical Manual Index Contact Elster Electricity for information 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.
3UHOLPLQDU\ REX Meter Technical Manual Index Contact Elster Electricity for information 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.
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.
