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Doc# E151701 iElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

Nexus 1262/1272 Meter Installation and Operation Manual Version 1.15

Published by:

Electro Industries/GaugeTech

1800 Shames Drive

Westbury, NY 11590

All rights reserved. No part of this publication may be reproduced or transmitted in

any form or by any means, electronic or mechanical, including photocopying, record-

ing, or information storage or retrieval systems or any future forms of duplication, for

any purpose other than the purchaser's use, without the expressed written permission

of Electro Industries/GaugeTech.

2013 Electro Industries/GaugeTech

Nexus and Shark are registered trademarks of Electro Industries/GaugeTech.

Communicator EXTTM is a trademark of Electro Industries/GaugeTech.

Doc# E151701 iiElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

This page intentionally left blank.

Doc# E151701 iiiElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

Customer Service and Support

Customer support is available 9:00 am to 4:30 pm, Eastern Standard Time, Monday

through Friday. Please have the model, serial number and a detailed problem descrip-

tion available. If the problem concerns a particular reading, please have all meter

readings available. When returning any merchandise to EIG, a return materials

authorization number is required. For customer or technical assistance, repair or

calibration, phone 516-334-0870 or fax 516-338-4741.

Product Warranty

Electro Industries/GaugeTech warrants all products to be free from defects in material

and workmanship for a period of four years from the date of shipment. During the

warranty period, we will, at our option, either repair or replace any product that

proves to be defective.

To exercise this warranty, fax or call our customer-support department. You will

receive prompt assistance and return instructions. Send the instrument, transporta-

tion prepaid, to EIG at 1800 Shames Drive, Westbury, NY 11590. Repairs will be made

and the instrument will be returned.

This warranty does not apply to defects resulting from unauthorized modification,

misuse, or use for any reason other than electrical power monitoring. The Nexus

1262/1272 meter is not a user-serviceable product.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED

OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABIL-

ITY OR FITNESS FOR A PARTICULAR PURPOSE. ELECTRO INDUSTRIES/

GAUGETECH SHALL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL OR

CONSEQUENTIAL DAMAGES ARISING FROM ANY AUTHORIZED OR

UNAUTHORIZED USE OF ANY ELECTRO INDUSTRIES/GAUGETECH

PRODUCT. LIABILITY SHALL BE LIMITED TO THE ORIGINAL COST OF

THE PRODUCT SOLD.

Doc# E151701 ivElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

Use of Product for Protection

Our products are not to be used for primary over-current protection. Any protection

feature in our products is to be used for alarm or secondary protection only.

Statement of Calibration

Our instruments are inspected and tested in accordance with specifications published

by Electro Industries/GaugeTech. The accuracy and a calibration of our instruments

are traceable to the National Institute of Standards and Technology through

equipment that is calibrated at planned intervals by comparison to certified standards.

Disclaimer

The information presented in this publication has been carefully checked for

reliability; however, no responsibility is assumed for inaccuracies. The information

contained in this document is subject to change without notice.

This symbol indicates that the operator must refer to an

explanation in the operating instructions. Please see chapters 3,

6, 11 and 12 for important safety information regarding

installation and hookup of the Nexus 1262/1272 meter.

Doc# E151701 vElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

About Electro Industries/GaugeTech (EIG)

Founded in 1975 by engineer and inventor Dr. Samuel Kagan, Electro Industries/

GaugeTech changed the face of power monitoring forever with its first breakthrough

innovation: an affordable, easy-to-use AC power meter.

Thirty years since its founding, Electro Industries/GaugeTech, the leader in power

monitoring and control, continues to revolutionize the industry with the highest qual-

ity, cutting edge power monitoring and control technology on the market today. An

ISO 9001:2000 certified company, EIG sets the industry standard for advanced power

quality and reporting, revenue metering and substation data acquisition and control.

EIG products can be found on site at mainly all of today's leading manufacturers,

industrial giants and utilities.

EIG products are primarily designed, manufactured, tested and calibrated at our facil-

ity in Westbury, New York.

Doc# E151701 viElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions


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Electro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid SolutionsElectro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

Table of Contents 1:Three-Phase Power Measurement 1-1

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8: Transformer Loss Compensation 8-1

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1.1: Three-Phase System Configurations

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1.1.1: Wye Connection

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1.1.3: Blondells Theorem and Three Phase Measurement

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1.5: Power Quality

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Doc# E151701 2- 1Electro Industries/GaugeTechThe Leader In Power Monitoring and Smart Grid Solutions

2: Meter Overview

2: Meter Overview

2.1: The Nexus 1262/1272 Multi-parameter Revenue Meter

The Nexus 1262/1272 transformer-rated, polyphase revenue meter is a unique collection of metering technologies designed to fulfill advanced metering require-ments. It provides high-accuracy power and energy measurements of Voltage, current and all power values, data logging and power quality recording. The unit makes the data available through the display, connected systems and historic logs.

2.2: Accu-MeasureTM Technology - Theory of Operation

The advanced metering capability of the Nexus 1262/1272 device is a result of EIGs Accu-MeasureTM Digital Sensing Technology. Accu-MeasureTM technology is a combination of high-speed sampling, high-resolution measurement and high-speed calculation. All Voltage and current waveforms are sampled and RMS values calcu-lated continuously every cycle. Values of Voltage, current and power are produced every three cycles and every second.

Figure 2.1 illustrates the key processes operating within the Nexus 1262/1272 meter. The meter allows for four types of inputs and can provide outputs to an integrated display, pulse outputs and several communication ports.

Nexus 1262/1272 Meter Processing

Voltage and current signals enter the meter and are sampled at up to 256 samples per cycle. Each sample is resolved to a digital value using 16-bit analog-to-digital converters. The Nexus 1272 meter has two 16-bit A/D converters and the Nexus 1262 meter has one. The first converter, which both meters have, is for the real-time measurements. The second converter, unique to the 1272, is for the waveform recorder. The use of two A/D converters ensures that both signals have maximum resolution, accuracy and integrity. The second converter also isolates energy sampling and calculations from the waveform fault recording requirements. This provides both advanced energy and advanced waveform analysis.


2: Meter Overview

Figure 2.1: How the Nexus 1262/1272 Meter Processes Inputs

The digitized signals are then passed to the appropriate processor. Real-time measurements are calculated in one processor and made available for meter readings and historical logs. A separate processor performs waveform recording. Calculated data and logs are stored in memory for delivery to displays, external systems and download processes.

The meter includes a time synchronizing input port that accepts an industry standard IRIG-B signal to synchronize meter time to standard universal time. If there is no IRIG-B signal, the meter uses an internal 20 ppm crystal or the primary power line frequency to keep meter time. The Line Frequency Clock Synchronization feature may be enabled or disabled. If it is not enabled, the internal clock crystal provides time synchronization. All readings and logs are time stamped to the nearest millisecond.

RS-485 Port #4

RS-485 Port #1

Ethernet and/ or Modem

KYZ Output 4 Channel

LED Test Pulse

IR Port

LCD Display

Sampling, Multiplexing

and Signal Conditioning

Real Time Measurements

Processing

Waveform Recording Processing

Memory

8 Channel Status Inputs

Current Input Circuitry

Voltage Input Circuitry

Time Synchronizing


2: Meter Overview

Eight status channels provide input of status or pulse signals. Status inputs are date/time stamped to the nearest millisecond and placed in the event log. Pulse inputs are multiplied by a user-supplied factor and accumulated in reading registers. These accumulated values can also be totalized. This feature makes the Nexus 1262/1272 meter a good fit in universal metering applications. Additionally, any one input channel can be selected to accept an End of Interval pulse from another meter.

Meter set-up parameters and all historical log data are stored in nonvolatile RAM. The user has multiple log functionality. Data is made available through the onboard display. Display screens are described in Chapter 3. Several additional communication channels operate simultaneously, including the optional Ethernet/Modem Combo Card. External systems can be connected to either of the RS485 ports or the Ether-net/Modem port. Stored data can be downloaded through the RS485 ports, the Ether-net/Modem port or the Optical port.


2: Meter Overview

2.3: Advanced Measurement Functionality

2.3.1: Advanced Revenue Billing Capability

The Nexus 1262/1272 device is a full four-quadrant power and energy meter with accuracy of within 0.06% of reading at full load unity PF. Energy measurements include: kWh Delivered & Received, kVARh Delivered & Received, kVAh, kVARh, kWh in each quadrant and Total kVAh. The meter measures instantaneous power and provides multiple, simultaneous demand measurements, including time-stamped maximum and minimum readings.

Time of Use

The Nexus meters Time of Use functionality offers the following standard capabilities:

8 TOU schedules

Bidirectional consumption and Demand

4 seasons/year

20-year calendar

Prior month and prior season readings for each schedule

Present month and present season readings for each schedule

Prior season may also be adjusted for a programmable freeze period

Total-to-date readings for each month

Total-to-date readings for each season

Cumulative and continuous cumulative Demand

Load Aggregation/Universal Metering

Using standard pulse inputs, the Nexus 1262/1272 meter can count pulses from external meters and accumulate usage. The pulse inputs can be used to totalize electrical usage and utility values, such as water or gas use data. Readings include:

8 pulse inputs


2: Meter Overview

Individual accumulating registers

4 totalizing registers

Totalization with Nexus meter kWh readings

Multiple Demand Windows

The Nexus 1262/1272 meter simultaneously monitors four demand structures. The unit offers:

Block Window Demand

Rolling Window Demand

Thermal Demand

Predictive Demand

Interval length from 1 second to over one hour

Up to 15 sub-intervals

End of Interval Pulse Output (with optional 4IPO Internal KYZ capability)

End of Interval Pulse Input

Time-Stamped Max/Min Demands

The unit gathers Time-stamped Max/Min Demands for all power values. Each of the following values is date/time stamped:

kW Demand, Delivered & Received, Max/Min

kVAR Demand, Delivered & Received, Max/Min

kVAR Coincident with kW Demand

kVA Demand, Max/Min

Amps Demand, Max/Min

Voltage Demand Max/Min


2: Meter Overview

Transformer Loss Compensation

Transformer Loss Compensation adjusts for both copper and iron losses with a simple user setup.

2.3.2: Communications and I/O Capabilities

The Nexus 1262/1272 meter features advanced communication which utilizes multiple Com ports using open protocols. The meters multi-port design allows multi-ple communication connections simultaneously. The Nexus 1262/1272 system provides a direct digital link, allowing selected data to be gathered without affecting the meter or your data. All of the advanced features of the 1262/1272 are made available through industry-standard Modbus and DNP 3.0 protocols. No proprietary or closed protocols are used.

Standard Communications

ANSI Type 2 Optical port

2 RS485 serial ports

Modbus RTU/ASCII protocol

DNP 3.0 Level 2 + protocol

Speeds up to 115200 bps

Optional Communications

The Nexus 1262/1272 meter allows you to select an additional port for one of the following uses:

INP2: Internal 56k Modem with telephone line noise rejection

INP200: Internal Ethernet TCP/IP (10/100BaseT) with multiple sockets and Modbus TCP and DNP TCP

INP202: Combination 56k Modem and Internal Ethernet TCP/IP (10/100BaseT)


2: Meter Overview

Standard Internal I/O

Extensive I/O capability is available in conjunction with all metering functions:

IRIG-B Time Synchronizing to GPS to 1 millisecond resolution

8 High-Speed Status Inputs for status detect or of load aggregation/universal metering inputs

Four KYZ pulse outputs which can be programmed to pulse for any accumulated reading. One of the pulse outputs can also be set for an End-of-Interval Sync Pulse.

Upgradable External I/O

The user can select from the following to connect multiple external I/O Modules for enhanced I/O capability:

Analog Outputs

Analog Inputs

Additional Status Inputs

KYZ Outputs

Relay/ Alarm Outputs

Control Options

ElectroLogicTM Relay Control provides user-definable control outputs:

Action and/or alarm on abnormal condition

Action on Boolean logic combinations of Inputs or electrical conditions


2: Meter Overview

2.3.3: Display Screens

The Nexus 1262/1272 meter features a built-in graphical back-lit FSTN LCD display with extended temperature Voltage compensation. This allows you to view energy data and to gather circuit diagnostic data such as Voltage, current, harmonics and phasor information. The display is easily programmable. See Chapter 3 for details on the Programmable Display.

2.3.4: Additional Switches

The Nexus 1262/1272 meter has additional switches & signals that help in using the unit (see Section 3.2 for more information):

The Infrared Test Pulse can be set to pulse for +Watt-hour, -Watt-hour, +VAR-hour,-VAR-hour and VA-hour. The pulse uses a time-modulated pulse integration which allows the pulse to be accurate during short duration pulse tests. The pulse integration uses industry-accepted reference standards.

The Mode Switch (magnetic reed switch) uses a magnet to switch operating modes.

The Test button is used to access Test Mode.

The Reset button is used to reset Demand.

2.3.5: Nexus External I/O Modules

A variety of optional analog or digital I/O modules mount externally to the Nexus 1262/1272 Socket meter. The Nexus 1262/1272 unit does not supply power to I/O modules. Use a power supply, such as EIGs PSIO, to power optional I/O modules. See Chapter 10 for details on installation and use of the Nexus External I/O modules.

2.3.6: Optional P40N/P40N+, P41N+ and P43N+ LED Remote Displays

The Nexus 1262/1272 Socket meter features a back-lit LCD display built into the face of the meter. In addition, Electro Industries offers optional external LED displays, powered by a power supply (such as the PSIO). The P40N+ (and legacy P40N), P41N+ and P43N+ displays provide easy access to information stored in the meter if an additional display is required for remote access. See Chapter 9 for further details.


2: Meter Overview

2.4: Nexus 1262/1272 Meter Forms

The Nexus 1262/1272 Socket meter offers three supported S-Based meter forms based on the rated Voltage and hookup required by the user. Below are the form specifications.

Form 9S can be ordered in an A-Base (Order Form 9A).

See Chapter 11 for corresponding Wiring diagrams and Appendix B for Blade configurations.

The Switchboard Meter offers two supported Z-Based forms, 9Z and 36Z (see Chapter 12).

NOTE: Form 45S replaces Form 5S and may also be used in 4-wire Delta circuits.

NOTE: See Section 2.6 for Rated Voltages.

Table 1: Nexus 1262/1272 Meter Forms

Form Hookup

9S 3E Wye or Delta36S 2 1/2E Wye45S 2E or 4W Delta


2: Meter Overview

2.5: Nexus 1262/1272 Meter Accuracy

2.6: Nexus 1262/1272 Meter Specifications Overview

Sense Inputs

Current (AC)

Transformer (CT) rated

Two or three current inputs depending on Form (Ia, Ib, Ic)

Class 2 - 1A nominal, burden [email protected]

Class 10, 20 - 5A nominal, burden 0.0125VA@25A

0.1% of nominal pick-up current

120% over-range of Meter Class

Current surge withstand (at 23o C): 100 Amps for 10 seconds, 300 Amps for 3

seconds, 500 Amps for 1 second

The current inputs are only to be connected to external current transformers.

Table 2: Nexus 1262/1272 Meter Accuracy

Value Accuracy

Voltage 0.02%

Current 0.05%

Frequency 0.001Hz

kW 0.06%

[email protected] 0.06%

[email protected] 0.10%

kVAR 0.10%

kVA 0.10%

PF 0.10%


2: Meter Overview

Voltage (AC)

Blade powered unit, standard Voltage (Option S): 480V max Phase to Reference (Va, Vb, Vc, to VRef), burden total 12V max (including power supply); 600V max Phase to Phase (Va to Vb, Vb to Vc, Vc to Va)

Blade powered unit, low Voltage (Option LV): 69V max Phase to Reference (Va, Vb, Vc, to VRef), burden total 12V max (including power supply); 120V between Va, Vb, Vc inputs

Externally powered units (Options SE, DE): 480V max Phase to Reference (Va, Vb, Vc, to VRef), burden 0.33VA@576V; 600V max between Va, Vb, Vc inputs

Input Impedance: 1Mohm/phase

20% over range of rated Voltage

2V pickup Voltage

External Power Supply Options

Standard external (Option SE): (102 to 276) Vac @50/60Hz, 12VAmax

Low Voltage external (Option DE): (18 to 60)Vdc, Burden 9W max

Separate power cord

Switchboard meter is always separately powered (option SE or DE)

Isolation

All inputs and outputs isolated to 2500 Volts

Com Ports isolated from each other to 1000 Volts

Sensing

Accu-MeasureTM Technology

16-bit A/D Inputs

True RMS


2: Meter Overview

8-Channel Sample and Hold

Memory

All meter setup parameters, measurements and logs contained in nonvolatile RAM

Standard Communications

LCD display

ANSI Type 2 Optical port

Two RS485 serial ports

Modbus RTU, Modbus ASCII and DNP 3.0 protocols

Data Speeds of up to 115200 bps

Eight High-Speed Input channels

Optional Communications

INP2: 56k Modem with dial-out capabilities

INP200: Internal 10/100BaseT Ethernet with Total Web Solutions

INP202: Ethernet (INP200) / Modem (INP2) Combo card

Modbus TCP and DNP LAN/WAN

Internal 8-Channel Digital Inputs

Type: Self-excited, for dry contacts only

Wetting Voltage: 12Vdc typical

Internal 4-Channel KYZ Outputs

Type: Form A or C

On Resistance: 23-35:

Peak Voltage: 350Vdc


2: Meter Overview

Continuous Load Current: 120mA

Peak Load Current: 350mA (10ms)

Off-State Leakage Current @350Vdc: 1:PA

Opto Isolation: 3750V rms (60 Hz, 1 min)

Clock Timing

IRIG-B input for synchronizing to external GPS clock signal - accuracy better than 1msec per month

Line Frequency Clock Synchronization - accuracy better than 1 second per month

Internal Clock Crystal - accuracy better than 2 minutes per month

Environmental (Temperature Specifications to Indirect Light)

Operating Temperature: (-40 to +85)C

Display Operating Temperature: (-20 to +60)C

Humidity: 95% non-condensing

Storage Temperature: (-40 to +85)C

Raintight Lexan Cover (Socket meter)

NOTE: At temperatures above 60 C the display may turn black. The display should return to normal once the temperature has cooled. If the meter is exhibiting a heating issue that causes the display to turn black, try shielding the meter from direct sun-light or otherwise provide some cooling effect to the meter.

Security

A hardware lock secures meter settings.

Two 10-character passwords are configurable: one password controls access to read meter digitally; a separate password controls access to meter programming.

An additional 8 level password sequence is available by user configuration.


2: Meter Overview

Internal Battery

Panasonic BR3032 3V Lithium Battery (or equivalent) maintains NVRAM and time during outages.

Modem Battery

3V Lithium Battery with custom leads and velcro mounting maintains Dial-Back feature during outages. Call factory for replacement battery - the part # is BAT1.

IRIG-B Port Impedance

1.8mA @ 5V

Compliance

ANSI C12.20 Class 0.2 (0.2% Accuracy)

ANSI C37.90.1 (Surge Withstand)

ANSI C62.41 (Surge Immunity)

ANSI C12.18 (Optical Port)

IEC/CISPR 14-1 (Continuous EM Disturbance)

IEC801-2 (Electrostatic Discharge)

IEC801-3 (Radiated EM Immunity)

IEC801-4 (EFT)

IEC687 (Voltage Dips and Interruptions)

IEC60687 (Class 0.2% Accuracy)

IEC 62053-22 (0.2% Accuracy)

IEC62052-11 (General Requirements; Mechanical Properties; Climactic Influences)


2: Meter Overview

2.7: Nexus 1262/1272 Meter Logging Specifications

*Assumes logs store 4 scaled energy readings every 15 minutes.**Number of events recorded (assumes 14 parameters monitored).***Number of waveform records. Each record may be from 8 to 64 cycles in duration, depending upon

meter setup.

2.8: DNP V3.00 Level 2

Nexus 1262 and 1272 meters support DNP V3.00 Level 2

DNP Level 2 Features

Up to 136 measurements (64 Binary Inputs, 32 Binary Counters, 64 Analog Inputs) can be mapped to DNP Static Points (over 3000) in the customizable DNP Point Map.

Up to 16 Relays and 8 Resets can be controlled through DNP Level 2.

Report-by-Exception Processing (DNP Events) Deadbands can be set on a per-point basis.

Available Freeze commands are Freeze, Freeze/No-Ack, Freeze with Time, and Freeze with Time/No-Ack.

Freeze with Time commands enable the Nexus meter to have internal time-driven Frozen and Frozen Event data. When the meter receives the time and interval, the data is created.

For complete details, download the appropriate DNP User Manual from our website at www.electroind.com.

Table 3:

Model Memory Historical Log 1*Historical

Log 2*

CBEMA/

ITIC**

Event Log**

Wave-form

Log***

Flicker Log**

OutputLog**

Input Log**

SystemEvents**

1272 Standard 85 Days 133 Days 512 1024 63 1536 256 1024 10241272 Advanced 555 Days 133 Days 512 1024 95 5120 256 1024 10241262 Standard 69 Days 32 Days N/A 512 N/A N/A 512 1024 10241262 Advanced 480 Days 133 Days N/A 512 N/A N/A 512 1024 1024


2: Meter Overview


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4EST-ODERETURNSTO-ODEAFTERAUSERSETAMOUNTOFTIME

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3.5: Using the Display Configurator

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'RXEOHFOLFNDisplay Configuration

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8VLQJWKHEXWWRQVRQWKHERWWRPRIWKHVFUHHQ\RXFDQ

5HWULHYHGLVSOD\VHWWLQJVIURPWKHFRQQHFWHGPHWHUE\FOLFNLQJRetrieve fromDisplay.

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/RDGDSUHYLRXVO\VDYHG/&'GLVSOD\ILOHE\FOLFNLQJLoadDQGVHOHFWWKHILOH\RXZDQWWRORDGLQWRWKLVVFUHHQLWLVDQGVILOH

5HWXUQWRWKHSUHYLRXVVFUHHQZLWKRXWVDYLQJDQ\FKDQJHVE\FOLFNLQJCancel

9LHZRQOLQHLQVWUXFWLRQVIRUXVLQJWKLVVFUHHQE\FOLFNLQJHelp

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Display screensavailable forassignmentto View modes

View Mode Columns

Right-click on a screen

to assign it to View mode or to copy it

Buttons that let you: Create customdisplay screens, Edit display screens, or Remove display screens from the available screens list

in a View mode, or Remove display screens from a View modeButtons that let you: Change the order of display screens

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$IWHU\RXFOLFNWKHCreateEXWWRQLQWKH$YDLODEOHVFUHHQVOLVW\RXZLOOVHHWKH/&'6FUHHQ6HOHFWLRQVFUHHQVKRZQEHORZ

Click to create custom screen

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&OLFNWKHUser definedEXWWRQLQWKH6FUHHQ7\SHER[7KHVFUHHQFKDQJHVWRDOORZ\RXWRVHWXSWKHQHZ'LVSOD\VFUHHQ

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Custom Screen with 3 Item Fields

Custom Screen with 1 Demand, 1 Timestamp Fields

Display screenlabel fields

Item entry fieldsclick here to

enter the Register containing

Modbus

the item

The information forthese fields comesfrom the metersModbus RegisterMap

This is where youcan specify amultiplier for yourdata

These fields let youspecify Scaling anddata display

Display screenlabel fields

Timestamp

Status field (does not displayon the LCD screen)

Demand field

See screen abovefor explanation ofthe fields on theright side of the screen

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IMPORTANT! All of the data items you select must be the same Modbus

typeIRUH[DPSOH)7KH0RGEXVW\SHLVOLVWHGLQWKH0RGEXVPDS6HHWKH([DPSOHEHORZ

Example:

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E&OLFNUpdateWRVDYHWKHLWHPVVWDUWLQJUHJLVWHUDGGUHVV

F(QWHUDQ\DGGLWLRQDOLWHPVLQWKHVDPHZD\

G:KHQ\RXILQLVKHQWHULQJLWHPVXVHWKHHQWU\ILHOGVLQWKHULJKWSRUWLRQRIWKHVFUHHQWRHQWHUGHWDLOVIRUWKHLWHPV0RGEXVW\SHDQGWRHQWHUVFDOLQJPXOWLSOLHUDQGGDWDGLVSOD\VHWWLQJV7KH0RGEXVW\SHLQIRUPDWLRQLVIRXQGLQ&KDSWHURIWKHNexus 1252/1262/1272 Meter Modbus Manual6HHWKHIROORZLQJH[DPSOH

Example:

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1 Cycle Block1 cycle Block Time Stamp 12/31/9999 23:59:59:99

+65536 V1 / D V21 cycle Phase A-N Voltage00090-0009300094-00095

910

0 50 10 msec F3 R1/65536 V2 sec F5 R

$ECIMAL3TARTINGREGISTER)TEMYOUARESELECTINGIS

-ODBUS4YPEIS&

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7KHILHOGVRQWKHOHIWXQGHUQHDWKWKH0XOWLSO\E\ILHOGVOHW\RXVHWXSKRZWKHGDWDZLOOEHGLVSOD\HGIRUH[DPSOHVSHFLI\LQJLIWKHGDWDLVDQXPEHURUVRPHRWKHUYDOXHZKHWKHU\RXZDQWWKHVLJQWRGLVSOD\IRUVLJQHGGDWDZKHWKHU\RXZDQWWKHGDWDVFDOHGWKHQXPEHURIGLJLWVDQGGHFLPDOSODFHVLQWKHILHOG&OLFNWKHSXOOGRZQPHQXVWRVHHDOWHUQDWHFKRLFHVIRUWKHILHOGV7KHHQWULHV\RXPDNHDIIHFWDOORIWKHLWHPVRQWKHVFUHHQ7KHWDEOHWKDWIROORZVVKRZVWKHILHOGVDQGWKHYDOLGHQWULHVIRUWKHP

Length: 2 Registers (4 bytes)

Range: +1,048,576 V2 / 0 V2 or +65536 I2 / 0 I2(1262 or 1272)

Unit: 1/4906 V2 secondary or 1/65536 A2 secondary (1262 or 1272)

These registers together are a four-byte unsigned integer. Conversion into secondary voltage or current involves multiplying by the appropriate scale and taking the square root of that value.

Depending on the unit and hardware, the range and unit of voltage reading differs. For a Nexus 1262/72 meter, the range goes to +1,048,576 V2 with a unit of 1/4096 V2.

3.5: Type F5 Secondary 1 Cycle RMS Voltage or Current

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CancelWRH[LWWKHVFUHHQwithout saving any changes

Table 1:

Entry fields Possible entries

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Power and Energy Display Tab

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Miscellaneous Tab

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3.6: Using the Base Programmable Display

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3.6.1: Pre-Defined Display Screens

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Screen Number Screen Name

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4: Performing Meter Testing

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4.1: Testing Tools

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InfraredTest Pulse

Test ButtonUnder Cover

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4.1.1: Test Pulse LED

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To program the Test Pulse LED:

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4.1.2: LCD Display

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4.2: Test Mode

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4.2.1: Entering Test Mode

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4.2.2: Using Test Mode

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manual nexus1262_1272

Documents

electrical power monitoring

smart grid solutionsnexus

warranty period

userserviceable product

unauthorized use

meter readings available

meter installation

purchasers use