CET iMeter 6 User manual

iMeter 6
Advanced Power Quality Analyzer
User Manual
Version: V1.0A
September 24, 2019

This manual may not be reproduced in whole or in part by any means without the express written
permission from CET Electric Technology (CET).
The information contained in this Manual is believed to be accurate at the time of publication; however,
CET assumes no responsibility for any errors which may appear here and reserves the right to make
changes without notice. Please consult CET or your local representative for latest product
specifications.
Standards Compliance
DANGER
This symbol indicates the presence of danger that may result in severe injury or death and permanent
equipment damage if proper precautions are not taken during the installation, operation or
maintenance of the device.
CAUTION
This symbol indicates the potential of personal injury or equipment damage if proper precautions are
not taken during the installation, operation or maintenance of the device.

DANGER
Failure to observe the following instructions may result in severe injury or
death and/or equipment damage.
➢
Installation, operation and maintenance of the meter should only be
performed by qualified, competent personnel that have the appropriate
training and experience with high voltage and current devices. The meter must
be installed in accordance with all local and national electrical codes.
➢
Ensure that all incoming AC power and other power sources are turned OFF
before performing any work on the meter.
➢
Before connecting the meter to the power source, check the label on top of
the meter to ensure that it is equipped with the appropriate power supply, and
the correct voltage and current input specifications for your application.
➢
During normal operation of the meter, hazardous voltages are present on its
terminal strips and throughout the connected potential transformers (PT) and
current transformers (CT). PT and CT secondary circuits are capable of
generating lethal voltages and currents with their primary circuits energized.
Follow standard safety precautions while performing any installation or service
work (i.e. removing PT fuses, shorting CT secondaries, …etc).
➢
Do not use the meter for primary protection functions where failure of the
device can cause fire, injury or death. The meter should only be used for
shadow protection if needed.
➢
Under no circumstances should the meter be connected to a power source if it
is damaged.
➢
To prevent potential fire or shock hazard, do not expose the meter to rain or
moisture.
➢
Setup procedures must be performed only by qualified personnel familiar with
the instrument and its associated electrical equipment.
➢DO NOT open the instrument under any circumstances.

Limited warranty
➢
CET Electric Technology (CET) offers the customer a minimum of 12-month
functional warranty on the meter for faulty parts or workmanship from the date
of dispatch from the distributor. This warranty is on a return to factory for repair
basis.
➢
CET does not accept liability for any damage caused by meter malfunctions. CET
accepts no responsibility for the suitability of the meter to the application for
which it was purchased.
➢
Failure to install, set up or operate the meter according to the instructions herein
will void the warranty.
➢
Only CET’s duly authorized representative may open your meter. The unit should
only be opened in a fully anti-static environment. Failure to do so may damage the
electronic components and will void the warranty.

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Table of Contents
Chapter 1 Introduction ........................................................................................................................................... 1
1.1 Overview................................................................................................................................................... 1
1.2 Features .................................................................................................................................................... 1
1.3 iMeter 6’s Application in Power and Energy Management Systems......................................................... 4
1.4 Getting more information......................................................................................................................... 4
Chapter 2 Installation.............................................................................................................................................. 5
2.1 Appearance............................................................................................................................................... 5
2.2 Unit Dimensions........................................................................................................................................ 6
2.3 Terminal Dimensions ................................................................................................................................ 6
2.4 Mounting .................................................................................................................................................. 7
2.5 Wiring Connections .................................................................................................................................. 7
2.5.2 3-Phase 4-Wire Wye Direct Connection with 3CTs or 4CTs............................................................ 8
2.5.3 3-Phase 4-Wire Wye with 3PTs and 3CTs or 4CTs........................................................................... 8
2.5.5 3-Phase 3-Wire Grounded Wye ..................................................................................................... 8
2.5.6 3-Phase 3-Wire Direct Delta Connection with 3CTs or 2CTs .......................................................... 9
2.5.7 3-Phase 3-Wire Open Delta with 2PTs and 3CTs or 2CTs ............................................................... 9
2.6 Communications Wiring ........................................................................................................................... 9
2.6.1 RS485 Port...................................................................................................................................... 9
2.6.2 Ethernet Port (10/100BaseT)....................................................................................................... 10
2.7 Digital Input Wiring................................................................................................................................. 10
2.8 GPS 1PPS Input wiring............................................................................................................................. 10
2.9 Digital Output Wiring.............................................................................................................................. 10
2.10 Energy Pulse Output Wiring.................................................................................................................. 10
2.11 Analog Input Wiring.............................................................................................................................. 11
2.12 Power supply Wiring............................................................................................................................. 11
2.13 Chassis Ground Wiring.......................................................................................................................... 11
Chapter 3 User Interface....................................................................................................................................... 12
3.1 Front Panel Interface .............................................................................................................................. 12
3.1.1 Front Panel LED Indicators........................................................................................................... 12
3.1.2 Front Panel Buttons ..................................................................................................................... 12
3.1.3 Front Panel Display ...................................................................................................................... 12
3.2 On-board Web Interface......................................................................................................................... 23
3.2.1 Setting PC's IP Address................................................................................................................. 23
3.2.2 Configure iMeter 6’s IP Address................................................................................................... 24
3.2.3 Accessing Web Interface.............................................................................................................. 24
Chapter 4 Applications.......................................................................................................................................... 56
4.1 Inputs and Outputs................................................................................................................................. 56
4.1.1 Digital Inputs................................................................................................................................ 56
4.1.2 Digital Outputs............................................................................................................................. 56
4.1.3 Energy Pulse Outputs................................................................................................................... 57
4.1.4 Analog Input................................................................................................................................. 57
4.2 Power and Energy................................................................................................................................... 57
4.2.1 Basic Measurements.................................................................................................................... 57
4.2.2 Energy Measurements................................................................................................................. 58
4.2.3 Interval Energy Measurements.................................................................................................... 58
4.2.4 High-speed Measurements.......................................................................................................... 58
4.2.5 Demand Measurements .............................................................................................................. 58
4.2.6 Max./Min. per Demand Period.................................................................................................... 59
4.3 Power Quality ......................................................................................................................................... 59
4.3.1 Phase Angles................................................................................................................................ 59
4.3.2 Power Quality Parameters ........................................................................................................... 59
4.3.3 Unbalance and Sequence Components....................................................................................... 61
4.3.4 Deviation...................................................................................................................................... 61
4.3.5 Supply Voltage Dips/Swells and Interruptions............................................................................. 61
4.3.6 Transients Voltage........................................................................................................................ 62

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4.4 Setpoints................................................................................................................................................. 62
4.5 Logical Module........................................................................................................................................ 64
4.6 Logging.................................................................................................................................................... 65
4.6.1 Max./Min. Log.............................................................................................................................. 65
4.6.2 Peak Demand Log ........................................................................................................................ 65
4.6.3 Interval Energy Recorder (IER) Log............................................................................................... 65
4.6.4 Waveform Recorder (WFR) Log.................................................................................................... 66
4.6.5 PQ Log.......................................................................................................................................... 66
4.6.6 SOE Log ........................................................................................................................................ 66
4.6.7 Data Recorder (DR) Log................................................................................................................ 66
4.6.8 Time of Use (TOU)........................................................................................................................ 67
4.7 Time Synchronization.............................................................................................................................. 68
4.8 Alarm Email............................................................................................................................................. 69
4.9 Ethernet Gateway ................................................................................................................................... 72
Chapter 5 Modbus Map........................................................................................................................................ 73
5.1 Basic Measurements............................................................................................................................... 73
5.2 Energy Measurements............................................................................................................................ 75
5.2.1 Total Energy Measurements ........................................................................................................ 75
5.2.2 Phase A Energy Measurements ................................................................................................... 75
5.2.3 Phase B Energy Measurements.................................................................................................... 76
5.2.4 Phase C Energy Measurements.................................................................................................... 76
5.2.5 TOU Energy Measurements ......................................................................................................... 77
5.2.6 Interval Energy Measurements.................................................................................................... 78
5.3 Pulse Counter.......................................................................................................................................... 78
5.4 Harmonic Measurements ....................................................................................................................... 78
5.4.1 Fundamental (Displacement) Measurements ............................................................................. 78
5.4.2 THD/TOHD/TEHD Measurements................................................................................................ 79
5.4.3 TDD Measurements ..................................................................................................................... 80
5.5 High-speed Measurements..................................................................................................................... 80
5.6 Event Counter ......................................................................................................................................... 81
5.7 Demand Measurements ......................................................................................................................... 81
5.7.1 Present Demand .......................................................................................................................... 81
5.7.2 Predicted Demand ....................................................................................................................... 82
5.7.3 Max./Min. per Demand Period.................................................................................................... 82
5.7.4 Peak Demand Log of This Month (Since Last Reset) .................................................................... 84
5.7.5 Peak Demand Log of Last Month (Before Last Reset).................................................................. 84
5.7.6 Demand Data Structure ............................................................................................................... 84
5.8 Log Register............................................................................................................................................. 84
5.8.1 Max./Min. Log.............................................................................................................................. 84
5.8.2 SOE Log ........................................................................................................................................ 87
5.8.4 PQ Log.......................................................................................................................................... 87
5.9 Log Data Format...................................................................................................................................... 89
5.9.1 Read General Reference Packet Structure (Function Code 0x14)................................................ 89
5.9.2 Interval Energy Recorder Log Data Structure............................................................................... 89
5.9.3 Data Recorder Log Data Structure ............................................................................................... 90
5.9.4 Waveform Recorder Log Data Structure...................................................................................... 90
5.10 Device Setup ........................................................................................................................................ 90
5.10.1 Basic Setup................................................................................................................................. 90
5.10.2 Setpoint Setup ........................................................................................................................... 94
5.10.3 Logical Module Setup................................................................................................................. 96
5.10.4 Data Recorder Setup.................................................................................................................. 97
5.10.5 Interval Energy Recorder Setup Registers.................................................................................. 99
5.10.6 Waveform Recorder (WFR) Setup.............................................................................................. 99
5.10.7 TOU Setup................................................................................................................................ 100
5.10.8 DO Control ............................................................................................................................... 103
5.10.9 Clear/Reset Control.................................................................................................................. 104
5.11 Time ................................................................................................................................................... 104

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5.12 Meter Information.............................................................................................................................. 105
Appendix A – Data Recorder Parameter............................................................................................................. 106
Appendix B – Data Recorder Default Settings..................................................................................................... 109
Appendix C – SOE Event Classification................................................................................................................ 111
Appendix E – Technical Specifications ................................................................................................................ 115
Appendix F – Standards Compliance .................................................................................................................. 116
Appendix G – Ordering Guide............................................................................................................................. 117

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Chapter 1 Introduction
This manual explains how to use the iMeter 6 Advanced Power Quality Meter. Throughout the manual the term
“meter” generally refers to all models.
This chapter provides an overview of the iMeter 6 meter and summarizes many of its key features.
1.1 Overview
The iMeter 6 is CET’s latest offer for the advanced Power Quality Monitoring of Incomers and Critical Feeders for
Utilities, Data Centers, High-Tech Manufacturing Facilities and Heavy Industries. Housed in an industry-standard
DIN form factor measuring 96mmx96mmx119.5mm, the iMeter 6’s compact size is perfectly suited for today’s
space restricting environment. The iMeter 6 features quality construction with metal enclosure, advanced Power
Quality and Revenue-Accurate measurements, high-resolution Waveform Recording capabilities, comprehensive
Data Logging with 1GB memory, extensive I/O and a user friendly, IPS Color Dot-Matrix Display @ 320x240. It
also provides either an I4 Input for Neutral Current measurement or a 0/4-20mA Analog Input for measuring
external transducer signal such as Residual or Leakage Current. With a standard 100BaseT Ethernet Port and a
RS-485 port with Modbus TCP/RTU support, the iMeter 6 becomes a vital component of an intelligent Power
Quality Monitoring System.
Following is a list of typical applications for the iMeter 6:
▪Class 0.2S Revenue Metering
▪Power Quality Monitoring of Main Incomer or Critical Feeder
▪Utility, Industrial and Commercial Metering
▪Substation, Building and Factory Automation
▪Low, Medium and High Voltage applications
▪Neutral (I4) and Residual Current (Ir) Monitoring
Contact CET Technical Support should you require further assistance with your application.
1.2 Features
Ease of use
▪Large, backlit, Color Dot-Matrix IPS display with wide viewing angle
▪Password protected setup via Front Panel, on-board Web Server or free PMC Setup software
▪Easy installation with mounting slide bar, no tools required
Basic True RMS Measurements (1 second update)
▪3-Phase Voltage, Current and Power measurements
▪Neutral Current (I4), Calculated Residual Current (Ir) and Frequency
▪kWh/kvarh Import/Export/Net/Total, kVAh Total
▪kvarh Q1 - Q4
▪Voltage and Current Phase Angles
▪Interval Energy measurements for kWh Import/Export, kvarh Import/Export and kVAh with programmable EN
Period
▪Device Operating Time (Running Hours)
High-speed RMS Measurements
▪3-phase Voltage, 3-Phase Current and Neutral Current (I4) @ 1 cycle
▪3-phase Power and Power Factor @ 1 cycle
Power Quality
▪IEC 61000-4-30 Class S Compliance
▪Waveform Recording at 256 samples per cycle
▪Fundamental measurements for 3-Phase Voltage, Current, Power, PF and I4
▪Voltage and Current Unbalance and Symmetrical Components
▪Voltage and Frequency Deviation
▪THD, TOHD, TEHD, K-Factor and TDD
▪Individual Harmonics up to 63rd
▪Dip/Swell/Interruption Detection and Transient Capture

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Demands
▪Demands and Predicted Demands for 3-Phase Voltage, Current, Power, PF, I4, Frequency, U and I Unbalance
and THD
▪Peak Demands with Timestamp for Current, Power, and PF of This Month and Last Month (or Since Last
Reset and Before Last Reset)
▪Max/Min values per demand interval
▪Demand synchronization with DI
Setpoints
▪16 Standard Setpoints with extensive list of monitoring parameters including Voltage, Current, Power,
Demands and THD, etc.
▪8 High-Speed Setpoints for Voltage, Current, Power, PF, Frequency, Deviation, and DI.
▪Configurable thresholds and time delays
▪6 Logical Modules supporting AND/OR/NAND/NOR operations
▪SOE, WF Recording, Data Recorder, DO, and Email Alarm trigger
Multi-Tariff TOU Capability
▪Two independent sets of TOU Schedules
oUp to 12 Seasons
o90 Holidays or Alternate Days
o20 Daily Profiles, each with 12 Periods with minimum 15-minute interval
o8 Tariffs, each providing kWh/kvarh Import/Export and kVAh
▪Switching between two TOU schedules according to pre-programmed time and logged as SOE event
▪Tariff switching based on DI status
Log memory
▪1GB on-board memory
▪Data Recorder Logs, Waveform Recorder Logs, Energy Log and Demand Logs
Data Recorder (DR) Log
▪12 Standard DR Logs and 4 High-Speed DR Logs
▪Recording interval from 1s to 40 days for standard DR and 1 to 60 cycles for High-Speed DR.
▪Up to 16 Programmable Parameters for each DR Log with programmable sources which include almost all
Real-Time measurements, Harmonics, Unbalance and Demand measurements
▪Configurable Depth and Recording Offset
▪Support FIFO or Stop-When-Full Recording Mode
Waveform Recorder (WFR) Log
▪2 independent groups of Waveform Recorders with a combined total of 256 entries
▪Simultaneous capture of 3-Phase Voltage and Current signals
▪Programmable formats and pre-fault cycles from 256x20 to 16x320
▪Support FIFO Recording Mode
Interval Energy Recorder (IER) Log
▪Interval Energy recording of kWh/kvarh Import/Export and kVAh Total
▪Support FIFO or Stop-When-Full Recording Mode
SOE Log
▪512 events time-stamped to ±1ms resolution
▪Setup Changes, Setpoint events and I/O Operations
PQ Log
▪512 entries time-stamped to ±1ms resolution
▪Sag/Swell/Interruption and Transient detection
Max/Min Log
▪Logging of Max./Min. values for measurements such as Voltage, Current, Frequency, kW, kvar, kVA, PF,
Unbalance, K-factor, and THD with Timestamp for This Month and Last Month (or Since Last Reset and Before
Last Reset)

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Digital Inputs
▪6 channels, volts free dry contact, 24VDC internally wetted
▪1000Hz sampling for status monitoring with programmable debounce
▪Pulse counting with programmable weight for each channel for collecting WAGES (Water, Air, Gas,
Electricity, Steam) information
▪Demand Synchronization
▪Tariff switching based on DI status
Digital Outputs
▪Up to 3 channels Form A Mechanical Relays for alarming and control
Analog Input (Optional)
▪0/4-20mA DC input with programmable zero and full scales
▪Can be used to measure external transducer signal such as Residual or Leakage Current
Communications
▪RS-485 (P1)
oOptically isolated RS485 port
oBaud rate from 1200 to 38,400bps
oModbus RTU, Ethernet Gateway
▪Ethernet (P2)
o10/100BaseT Ethernet Port with RJ45 connection
oModbus RTU over TCP/IP, Modbus TCP, HTTP, SMTP, SNTP, FTP
Real-time clock
▪Battery-backed Real-time Clock with 6ppm accuracy (<0.5s per day)
System Integration
▪Supported by CET’s PecStar® iEMS
▪Easy integration into other Automation or SCADA systems via Modbus RTU and Modbus TCP protocols
▪The on-board, password protected Web Server allows access to its data and supports the configuration for
most of the setup parameters via a standard web browser