Accuenergy Acuvim IIR-M-1A-P2, Acuvim IIR-D-1A-P2, Acuvim IIR-D-1A-P1, Acuvim IIR-M-1A-P1 User manual

Acuvim II Series Power Meter

User's Manual

Copyright©2012 V1.63

This manual may not be altered or reproduced in whole or in part by any means
without the expressed written consent of Accuenergy.

The information contained in this document is believed to be accurate at the time of
publication, however, Accuenergy assumes no responsibility for any errors which may
appear here and reserves the right to make changes without notice. Please ask the
local representative for latest product specications before ordering.

[ Document #1040E2163 Revision Date: Apr., 2012 ]

I

Please read this manual carefully before installation, operation and maintenance of
Acuvim II series meter.

The following symbols in this manual and on Acuvim II series meters are used to
provide warning of danger or risk during the installation and operation of the meters.

Electric Shock Symbol: Carries information about procedures which must
be followed to reduce the risk of electric shock and danger to personal
health.

Safety Alert Symbol: Carries information about circumstances which if not
considered may result in injury or death.

This mark indicates that this product is UL listed.

Installation and maintenance of the Acuvim II series meter should only be performed
by qualied, competent professionals who have received training and should have
experience with high voltage and current devices.

Accuenergy shall not be responsible or liable for any damages caused by improper
meter installation and/or operation.

II

Content

Chapter 1 Introduction-------------------------------------------------------------------1

1.1 Meter Overview---------------------------------------------------------------------------2

1.2 Areas of Application---------------------------------------------------------------------4

1.3 Functionality-------------------------------------------------------------------------4

Chapter 2 Installation-------------------------------------------------------------------9

2.1 Appearance and Dimensions---------------------------------------------12

2.2 Installation Methods------------------------------------------------------14

2.3 Wiring------------------------------------------------------------------------16

2.3.1 Terminal Strips------------------------------------------------------------------ 16

2.3.2 Power Requirement------------------------------------------------------------17

2.3.3 Voltage Input Wiring-----------------------------------------------------------20

2.3.4 Current Input Wiring-----------------------------------------------------------23

2.3.5 Frequently Used Wiring Methods------------------------------------------25

2.3.6 Communication----------------------------------------------------------------30

Chapter 3 Meter Display and Parameter Settings-------------------------------------------31

3.1 Display Panel and Keys-------------------------------------------------32

3.2 Metering Data--------------------------------------------------------35

3.3 Statistics Data---------------------------------------------------------40

3.4 Demand Data-----------------------------------------------------------41

3.5 Harmonic Data------------------------------------------------------------42

3.6 Expanded I/O Module Data-------------------------------------------44

3.7 Parameter Settings Mode-------------------------------------------------48

3.8 Page Recovery Function-------------------------------------------------62

Chapter 4 Detailed Functions and Software--------------------------------------------------63

4.1 Basic Analog Measurements---------------------------------------------64

III

4.2 Max/Min--------------------------------------------------------------------68

4.3 Harmonics and Power Quality Analysis--------------------------------68

4.4 Over/Under Limit Alarming---------------------------------------------69

4.5 Data Logging---------------------------------------------------------------78

4.6 Time of Use (TOU)----------------------------------------------------------------------83

4.7 Power Quality Event Logging and Waveform Capture----------------------89

Chapter 5 Extended Modules --------------------------------------------------------------------97

5.1 IO Modules-------------------------------------------------------------------------------98

5.2 Ethernet Module (AXM-NET) ------------------------------------------------------127

5.3 ProBus Module (AXM-PROI)------------------------------------------------------165

5.4 RS485 Module (AXM-RS485)-------------------------------------------------------182

Chapter 6 Communication--------------------------------------------------------------187

6.1 Modbus Protocol Introduction-------------------------------------------188

6.2 Communication Format--------------------------------------------------191

6.3 Data Address Table and Application Details---------------------------196

6.3.1 System Parameter Setting------------------------------------------------198

6.3.2 System Status Parameter------------------------------------------------200

6.3.3 Date and Time Table------------------------------------------------------201

6.3.4 Over/Under Limit Alarming Setting-----------------------------------201

6.3.5 I/O Modules Settings----------------------------------------------------204

6.3.6 Metering Parameter Address Table----------------------------------208

6.3.7 Data Logging----------------------------------------------------------------221

6.3.8 Time of Use TOU------------------------------------------------------------ 230

Appedix-----------------------------------------------------------------------------------------------261

Appendix A Technical data and specifications------------------------262
Appendix B Ordering Information------------------------------------------267
Appendix C Revision History------------------------------------------------270

IV

Starting!

Congratulations!

You have purchased an advanced, versatile, multifunction power meter. This meter
can work as a remote terminal unit (RTU) that contributes to your system's stability
and reliability by providing real-time power quality monitoring and analysis.

When you open the package, you will nd the following items

1. Acuvim II series meter 1

2. Terminal Blocks 3

3. Installation clips

4. Rubber Gasket 1

5. Product Disk (Manual, Warranty, Software) 1

6. Additional documentation(Quick Setup Guide, Calibration Certicate)

To avoid complications, please read this manual carefully before installation and
operation of the Acuvim II series meter.

Chapter 1 Introduction

Chapter 2 Installation and Wiring

Chapter 3 Meter Display and Parameter Settings

Chapter 4 Detailed Functions and Software

Chapter 5 Extended Modules

Chapter 6 Communication

Appendix Technical Data, Specications and Ordering Information

4

2

V

Chapter 1 Introduction

1.1 Meter Overview

1.2 Areas of Application

1.3 Functionality

1.1 Meter Overview

Powerful Multifunction Power Meter

The Acuvim II series multifunction digital power meter is designed using
modern MCU and DSP technology. It integrates three-phase energy measuring
and displaying, energy accumulating, power quality analysis, malfunction
alarming, data logging and network communication. A vivid LCD display with
large characters and, time of use programmable backlight provides a clear real­time data readout.

An Ideal for Electric Automation SCADA Systems

The Acuvim II series meter is the ideal choice for replacing traditional, analog
electric meters. In additon to providing clear real-time readings on the meter
front, it can also be used as a remote terminal unit (RTU) for monitoring and
controlling for a SCADA system. Users can access all measurement parameters
via the standard RS485 communication port (or the optional Ethernet port) with
the Modbus

Energy Management

The Acuvim II series meter is able to measure bidirectional, four quadrants
kWh and kvarh. It provides maximum/minimum records for power usage and
power demand parameters. All power and energy parameters can be viewed
remotely via software in order to easily monitor various parameters. In addition,
measurement tables can be viewed from the free Acuview software.

Remote Power Control

This meter is designed for measuring and monitoring power quality parameters.
Since different I/O modules can be added to the meter, this expands the
capabilities and provides a very flexible platform for using the meter as a

TM

protocol.

2

distributed RTU, for metering, monitoring and remote controlling, all in one unit.

Power Quality Analysis

Utilizing digital signal processing (DSP) technology, the Acuvim II series meter
provides high accuracy power quality analysis and supports remote monitoring
via the Ethernet module. The meter continuously updates metering results and
allows users to access the meter online to monitor parameters such as voltage
and current THD, harmonics up to the 31

st

(63rd for

Acuvim IIR/IIE/IIW

), voltage

crest factor, current K factor, and voltage and current unbalance factor etc.

Data Logging

The Acuvim IIR/IIE/IIW meter contains 4 megabytes ,IIW contains 8 megabytes
of onboard memory for data logging and historical trending. Since the meter
contains a real-time clock, all events and logged data will be time stamped.

Time of use (TOU-Acuvim IIE)

User can assign up to 4 different tariffs (sharp, peak, valley and normal) to
dierent time period within a day according to the billing requirements. The
meter will calculate and accumulate energy to dierent taris according to the
meter’s internal clock timing and TOU settings.

Power Quality Event Logging

When a power quality event happens, such as voltage sag and swell, etc, Acuvim
IIW will record the timestamp and the triggering condition of the event. It can
save up to 50, 000 power quality events.

Waveform Capture

Acuvim IIW can record 8 groups of voltage and current waveforms. It logs at 32
points per cycle. It provides the waveform record of 8 cycles before and after the

triggering point. It also supports a settable triggering condition.

3

1.2 Areas of Application

Power Distribution Automation Electric Switch Gear and Control Panels
Industry Automation Building Automation
Energy Management Systems Marine Applications
Renewable Energy

1.3 Functionality

Multifunction

Acuvim II meters provide powerful data collecting and processing functions. In
additon to measuring various parameters, the meter is able to perform demand
metering, harmonic analysis, max/min statistic recording, over/under limit
alarming, energy accumulating and data logging.

High Accuracy

Accuracy of Voltage and Current is 0.2%, True-RMS.
Accuracy of Power and Energy is 0.5%(Acuvim IIR/IIE/IIW is 0.2 %), while
monitoring all four quadrants.

Compact and Easy to Install

This meter can be installed into a standard ANSI C39.1 (4” Round) or an IEC
92mm DIN (Square) cut out. With the 51mm depth after mounting, the Acuvim
II series meter can be installed in a small cabinet. Mounting clips are used for
easy installation and removal.

Easy to Use

All metering data and setting parameters can be accessed by using the front
panel keys or via the communication port. Setting parameters are stored in the

EEPROM so that content will be preserved when the meter is powered o.

4

Multiple Wiring Modes

The Acuvim II series meter can be used in high voltage, low voltage, three phase
three wires, three phase four wires and single phase systems using different
wiring mode settings.

High Safety, High Reliability

Acuvim II series meter was designed according to industrial standards. It can
run reliably under high power disturbance conditions. This meter has been fully
tested for EMC and safety compliance in accordance with UL and IEC standards.

5

Function Comparison of Acuvim II series Meters

CATEGORY ITEM Parameters

Phase Voltage V1, V2, V3, Vlnavg

Line Voltage V12, V23, V31, Vllavg

Current I1, I2, I3, In, Iavg

Power P1, P2, P3, Psum

Reactive Power Q1, Q2, Q3, Qsum

Apparent Power S1, S2, S3, Ssum

Power Factor PF1, PF2, PF3, PF

Frequency F

Load Features Load Features

Four Quadrant PowersFour Quadrant Powers

Energy Ep_imp, Ep_exp, Ep_total, Ep_net

Reactive Energy Eq_imp, Eq_exp, Eq_total, Eq_net

Apparent Energy Es

Demand

Two formats adjust

voltage and current
Waveform

Voltage Unbalance
Factor

Current Unbalance
Factor

Voltage THD THD_V1,THD_V2,THD_V3, THD_Vavg

Current THD THD_I1, THD_I2, THD_I, THD_Iavg

Individual Harmonics

Voltage Crest Factor Crest Factor

TIF THFF

Current K factor K Factor

MAX with Time Stamp
MIN with Time Stamp

Dmd_P, Dmd_Q, Dmd_S, Dmd_I1,
Dmd_I2, Dmd_I3

TOU, 4 Taris, 12 Seasons, 14
Schedules

Month/Day/Hour/Minute; Month/
Week/First few weeks/Hour/Minute

Trigger, Manual, DI change, Sag/
Dips, Swell, Over Current

U_unbl

I_unbl

Harmonics 2nd to 31st ( 63rd for
Acuvim IIR,/llE/llW)

Each phase of V & l;Total of P, Q, S,
PF & F;Demad of P,Q & S;Each phase
THD of V & I;Unbalnce factor of V & I

METERING

TOU

MONITORING

REAL TIME
METERING

ENERGY &

DEMAND

TIME OF USE Energy/max demand

DAYLIGHT SAVING

TIME

Waveform Capture

POWER QUALITY

STATISTICS

Acuvim

II

Acuvim

IIR

Acuvim

IIE

Acuvim

IIW

OTHERS

OPTION

MODULE

ALARM

POWER QUALITY
EVENT LOGGING

Data Logging

ONBOARD

MEMORY SIZE

COMMUNICATION

TIME Real Time Clock

I/O OPTION

COMMUNICATION

Over/Under Limit
Alarm

SAG/DIPS,SWELL Voltage

Data Logging 1
Data Logging 2
Data Logging 3

V,I,P,Q,S,PF,V_THD & I_THD each
phase and total or average;
Unbalance factor of V & I;load
type;Analog Input of each channel

F, V1/2/3/lnavg, V12/23/13/lavg,
I1/2/3/n/avg, P1/2/3/sum, Q1/2/3/
sum, S1/2/3/sum, PF1/2/3, PF, U_
unbl, I_unbl, Load Type, Ep_imp,
Ep_exp, Ep_total, Ep_net, Eq_
imp, Eq_exp, Eq_total, Eq_net, Es,
THD_V1/2/3/avg, THD_I1/2/3/avg,

Harmonics 2nd to 63rd, Crest Factor,

THFF, K Fac tor, sequence and phase
angles, DI counter, AI, AO, Dmd P/Q/
S, Dmd I1/2/3

Memory Bytes — 4MB 4MB 8MB

RS485 Port,Half
Duplex,
Optical Isolated

Switch Status (DI) Digital Input (Wet)

Power Supply for DI 24 Vdc

Relay Output (RO) NO, Form A

Digital Output (DO) Photo-MOS

Pulse Output (PO) By using DO

Analog Input (AI) 0(4)~20mA, 0(1)~5V

Analog Output (AO) 0(4)~20mA, 0(1)~5V

Ethernet

Probus-DP Probus-DP/V0

RS485 Module Additional Modbus RTU

Modbus®-RTU Protocol

Year, Month, Date, Hour, Minute,
Second

10M/100M, Modbus-TCP, HTTP
Webpage, Email

Function; Option; Blank NA

Chapter 2 Installation

2.1 Appearance and Dimensions

2.2 Installation Methods

2.3 Wiring

2.3.1 Terminal Strips

2.3.2 Power Requirements

2.3.3 Voltage Input Wiring

2.3.4 Current Input Wiring

2.3.5 Frequently Used Wiring Methods

2.3.6 Communication

Considerations When Installing Meters



Installation of the meter must be performed by qualied personnel only, who
follow standard safety precautions through the installation procedures. Those
personnel should have appropriate training and experience with high voltage
devices. Appropriate safety gloves, safety glasses and protective clothing are
recommended.



During normal operation, dangerous voltage may ow through many parts of
the meter, including terminals, and any connected CTs (Current Transformers)
and PTs (Potential Transformers), all I/O (Inputs and Outputs) modules and their
circuits. All primary and secondary circuits can, at times, produce lethal voltages
and currents. AVOID contact with any current-carrying surfaces.



The meter and its I/O output channels are NOT designed as primary protection
devices and shall NOT be used as primary circuit protection or in an energy­limiting capacity. The meter and its I/O output channels can only be used as
secondary protection. AVOID using the meter under situations where failure of
the meter may cause injury or death. AVOID using the meter for any application
where risk of re may occur.



All meter terminals should be inaccessible after installation.



Do NOT perform Dielectric (HIPOT) test to any inputs, outputs or
communication terminals. High voltage testing may damage electronic
components of the meter.



Applying more than the maximum voltage the meter and/or its modules can
withstand will permanently damage the meter and/or its modules. Please refer
to the specications for all devices before applying voltages.

10



When removing meter for service, use shorting blocks and fuses for voltage
leads and power supply to prevent hazardous voltage conditions or damage
to CTs. CT grounding is optional.



ACCUENERGY recommends using a dry cloth to wipe the meter.

NOTE: IF THE EQUIPMENT IS USED IN A MANNER NOT SPECIFIED
BY THE MANUFACTURER, THE PROTECTION PROVIDED BY THE
EQUIPMENT MAY BE IMPAIRED.

NOTE: THERE IS NO REQUIRED PREVENTIVE MAINTENANCE OR
INSPECTION NECESSARY FOR SAFETY. HOWEVER, ANY REPAIR OR
MAINTENANCE SHOULD BE PERFORMED BY THE FACTORY.

DISCONNECT DEVICE: The following part is considered the equipment
disconnect device.

A SWITCH OR CIRCUIT-BREAKER SHALL BE INCLUDED IN THE INSTALLATION.
THE SWITCH SHALL BE IN CLOSE PROXIMITY TO THE EQUIPMENT AND WITHIN
EASY REACH OF THE OPERATOR. THE SWITCH SHALL BE MARKED AS THE
DISCONNECTING DEVICE FOR THE EQUIPMENT.

11

The installation method is introduced in this chapter. Please read this chapter
carefully before beginning installation.

2.1 Appearance and Dimensions

Unit: mm(inches)

Multifunction Power Meter





96.00 (3.800)

H P E V/A



96.00 (3.800)

Front View of the Display Meter

and Remote Display Unit



Gasket

Gasket

7.60 (0.300)

96.00 (3.800)



91.00 (3.583)

35.90

(1.413)

50.70 (1.996)

12.8

(0.504)

Side View of the

Display Meter

91.00 (3.583)

35.90

(1.413)

12.8

(0.504)

Side View of the

Remote Display Unit

91.00 (3.583)

35.90

(1.413)

50.70 (1.996)

Side View of the

DIN rail Meter

14.00

(0.551)

38.00 (1.496)

12

96.00 (3.800)

Fig 2-1 Appearance and dimensions of Acuvim II series meter

Table 2-1 Part name of Acuvim II series meter

Part Name Description

LCD Display



Front Casing



Key Four keys are used to select display and set.



Enclosure



DIN rail Used for Installation 35mm rail of the DIN rail Meter.



Voltage Input Terminals Used for voltage input.



Current Input Terminals Used for current input.



Power Supply Terminals Used for control power input



Communication Terminals Communication output.



Interface



Installation Clip Used for xing the meter to the panel.

Gasket

Large bright white backlight LCD display.

Visible portion (for display and control) after mounting
onto a panel.

The Acuvim II series meter enclosures is made of high
strength anti-combustible engineering plastic.

Used for link the remote display unit and the DIN rail
meter.

Insert the gasket in between the meter and the cutout to
cover up gaps from the round hole.

13

2.2 Installation Methods

Environmental

Before installation, please check the environment, temperature and humidity to
ensure the Acuvim II series meter is being placed where optimum performance
will occur.

Temperature

Operation: -25˚C to 70˚C.

Storage: -40˚C to 85˚C

Humidity

5% to 95% non-condensing.

The Acuvim II series meter should be installed in a dry and dust free
environment. Avoid exposing meter to excessive heat, radiation and high
electrical noise source.

Installation Steps

The Acuvim II series meter can be installed into a standard ANSI C39.1 (4”
Round) or an IEC 92mm DIN (Square) form.

1. Cut a square hole or round hole on the panel of the switch gear.
The cutting size is shown in g 2.3.

Unit: mm (inches)

Fig 2-2 Panel Cutout

14

2. Remove the clips from the meter, and insert the meter into the square hole
from the front side. Please note: optional rubber gasket must be installed on
the meter before inserting the meter into the cut out.

Panel

Fig 2-3 Put the meter into the opening

Panel

3. Install clips on the back side of the meter and secure tightly to ensure the
meter is axed to the panel.

Panel

Fig 2-4 Use the clips to x the meter on the panel

Note: The display meter and the remote display unit have the same installation
method. The DIN rail meter is simply installed on a 35mm DIN rail.

15

2.3 Wiring

2.3.1 Terminal Strips

There are four terminal strips at the back of the Acuvim II series meter. The three
phase voltage and current are represented by using 1, 2, and 3 respectively.
These numbers have the same meaning as A, B, and C or R, S, and T used in
other literature.

Current Input Terminal Strip

Voltage Input Terminal Strip

Power Supply Terminal Strip Communication Terminal Strip

Fig 2-5 Ter minal Strips of Acuvim II series meter

16

DANGER

Only the qualified

personnel does do

the wire connection

work. Make sure the

power supply is cut o

and all the wires are

powerless. Failure to

observe it may result in

severe injury or death.

NOTE

Make sure the control

power terminal of

the meter ground is

connected to the safety

Earth of switchgear.

NOTE

Make sure the voltage

of power supply is

the same as what the

meter needed for its

control power.

Safety Earth Connection

Before setting up the meter's wiring, please make sure
that the switch gear has an earth ground terminal.
Connect both the meter's and the switch gear's
ground terminal together. The following ground
terminal symbol is used in this user's manual.

Fig 2-6 Safety Earth Symbol

2.3.2 Power Requirement

Control Power

There are 2 options for the Control Power of the
Acuvim II series meter:

1. Standard: 100~415Vac (50/60Hz) or 100-300Vdc

2. Low Voltage DC Option: 20-60Vdc

The 2 options must be chosen according to the
application. Please see the ordering information
appendix for further details.

The meter's typical power consumption is very low
and can be supplied by an independent source
or by the measured load line. A regulator or an
uninterrupted power supply (UPS) should be used
under high power fluctuation conditions. Terminals
for the control power supply are 11, 12 and 13 (L,
N, and Ground). A switch or circuit-breaker shall be
included in a building installation. It shall be in close

17

proximity to the equipment, within easy reach of the operator, and shall be
marked as the disconnecting device for the equipment.

Fig 2-7 Power supply

A fuse (typical 1A/250Vac) should be used in the auxillary power supply loop.
No. 13 terminal must be connected to the ground terminal of the switchgear.
An isolated transformer or EMC lter should be used in the control power supply
loop if there is a power quality problem in the power supply.

NOTE

A lter should be

used if there is

an EMI problem.

Fig 2-8 Power supply With EMC lter

Choice of wire of power supply is AWG22-16 or 0.6-1.5mm2.

Voltage Input

Maximum input voltage for the Acuvim II series meter shall not exceed
400LN/690LL VAC rms for three phase or 400LN VAC rms for single phase.

Potential Transformer (PT) must be used for high voltage systems. Typical
secondary output for PTs shall be 100V or 120V. Please make sure to select an

18

appropriate PT to maintain the measurement accuracy of the meter. When
connecting using the star conguration wiring method, the PT's primary side
rated voltage should be equal to or close to the phase voltage of the system to
utilize the full range of the PT. When connecting using the delta conguration
wiring method, the PT's primary side rated voltage should be equal to or close
to the line voltage of the system. A fuse (typical 1A/250Vac) should be used in
the voltage input loop. The wire for voltage input is AWG16-12 or 1.3-2.0mm2.

Note: In no circumstance should the secondary of the PT be shorted. The
secondary of the PT should be grounded at one end. Please refer to the wiring
diagram section for further details.

Current Input

Current Transformers (CTs) are required in most engineering applications.
Typical current rating for the secondary side of the CT shall be 5A (standard)
or 1A (Optional), please refer to the ordering information appendix for further
details. CTs must be used if the system rated current is over 5A. The accuracy
of the CT should be better than 0.5% with rating over 3VA is recommended in
order to preserve the meter's accuracy. The wire between CTs and the meter
shall be as short as possible. The length of the wire have an effect on the
accuracy.

2

The wire size of current input is AWG15-10 or 1.5-2.5mm

.

Note: The secondary side of the CT should not be open circuit in any
circumstance when the power is on. There should not be any fuse or switch in
the CT loop. One end of the CT loop should be connected to the ground.

Vn Connection

Vn is the reference point of the Acuvim II series meter voltage input. Low wire
resistance helps improve the measurement accuracy. Dierent system wiring

19

modes require different Vn connection methods. Please refer to the wiring
diagram section for more details.

Three Phase Wiring Diagram

This meter can satisfy almost any kind of three phase wiring diagrams. Please
read this section carefully before choosing the suitable wiring method for your
power system.

Voltage and current input wiring mode can be set separately in the meter
parameter setting process. The voltage wiring mode can be set as 3-phase 4-line
Wye (3LN), 3-phase 4-line 2PT Wye mode (2LN*) and 3-phase 3-line open delta
(2LL). The current input wiring mode can be set as 3CT, 2CT and 1CT*. Any
voltage mode can be grouped with one of the current modes.

Note: " * " wiring method not applicable to

Acuvim IIR/IIE/IIW

.

2.3.3 Voltage Input Wiring

3-Phase 4-Line Wye Mode (3LN)

The 3-Phase 4-Line wye mode is commonly used in low voltage electric
distribution power systems. For voltage lower than 400LN/690LL Vac, power
line can be connected directly to the meter's voltage input terminal as shown in
g 2.10a. For high voltage systems (over 400LN/690LL Vac), PTs are required as
shown in g 2.10b. The meter should be set to 3LN for both voltage levels.

20

Fig 2-9a 3LN direct connection

Fig 2-9b 3LN with 3PT

3-Phase 4-Line 2PT Mode (2LN*)

In a 3-Phase 4-Line wye system, 2PT wye mode is used when the 3 phase power
system is balanced. The connection method is shown in g 2.11. The voltage
of V2 is calculated according to the V1 and V3. The voltage input mode of the
meter should be set to 2LN for the 2PT voltage input wiring mode.

21

Fig 2-10 2LN with 2PTs (*)

3-Phase 3-Line Direct Connection Mode (3LL)

In a 3-Phase 3-Line system, power line A, B and C are connected to V1, V2 and
V3 directly. Vn is oated. The voltage input mode of the meter should be set to
3LL.

Fig 2-11 3LN 3-Phase 3-Line direct connection

3-Phase 3-Line open Delta Mode (2LL)

Open delta wiring mode is often used in high voltage systems. V2 and Vn are

22

connected together in this mode. The voltage input mode of the meter should
be set to 2LL for this voltage input wiring mode.

Fig 2-12 2LL with 2PTs

2.3.4 Current Input Wiring

3CT

The 3CT current wiring configuration can be used when either 3CTs are
connected (as shown in Fig 2.14) or 2CTs are connected (as shown in Fig 2.15)
to the system. In either case, there is current owing through all three current
terminals.

Fig 2-13 3CTs a

23

Fig 2-14 3CTs b

2CT

The dierence between Fig 2.15 and Fig 2.16 is that no current ows through
current input terminal I21 and I22. The meter should be set to the I2 value
which is calculated from formula i1+i2+i3=0. The current input mode of the
meter should be set to 2CT .

Fig 2-15 2CTs

1CT*

If it is a three phase balanced system, 1 CT connection method can be used. The
other two channels are calculated accordingly.

24

Fig 2-16 1CT (*)

2.3.5 Frequently Used Wiring Method

In this section, the most common voltage and current wiring combinations
are shown in different diagrams. In order to display measurement readings
correctly, please select the appropriate wiring diagram according your setup
and application.

1. 3LN, 3CT with 3 CTs.

Fig 2-17 3LN, 3CT

25

2. 3LN, 3CT with 2 CTs

3. 2LN, 2CT*

Fig 2-18 3LN, 3CT with 2CTs

Fig 2-19 2LN, 2CT (*)

26

4. 2LN, 1CT*

5. 2LL, 3CT

Fig 2-20 2LN, 1CT (*)

Fig 2-21 2LL, 3CT

27

6. 2LL, 2CT

7. 2LL, 1CT*

Fig 2-22 2LL, 2CT

Fig 2-23 2LL, 1CT (*)

28

8. Single Phase 2 Line (Wiring mode setting 3LN, 3CT)

Fig 2-24 Single phase 2Lines

9. Single Phase 3 Line (Wiring mode setting 3LN, 3CT)

Fig 2-25 Single phase 3Lines

29

2.3.6 Communication

Acuvim II series meter uses RS485 serial communication and the Modbus­RTU protocol. The terminals of communication are A, B, and S (14, 15, 16). A is
dierential signal +, B is dierential signal - and S is connected to the shield of
the twisted pair cables. Up to 32 devices can be connnected on a RS485 bus.
Use good quality shielded twisted pair cable, AWG22 (0.5mm

2

) or higher. The
overall length of the RS485 cable connecting all devices should not exceed
1200m (4000ft). The Acuvim II series meter is used as a slave device of masters
such as a PC, PLC, Data Collector or RTU.

If the master does not have RS485 communication port, a converter (such as a
RS232/RS485 or a USB/RS485 converter) will be required. Typical RS485 network
topologies include line, circle and star (wye).The shield of each segment of the
RS485 cable must be connected to the ground at one end only.

Every A(+) should be connected to A(+), B(-) to B(-), or it will influence the
network, or even damage the communication interface.

The connection topology should avoid “T” type which means there is a new
branch and it does not begin from the beginning point.

Keep communication cables away from sources of electrical noise whenever
possible.

When using a long communication cable to connect several devices, an anti
signal reflecting resistor (typical value 120Ω-300Ω/0.25W) is normally added
to the end of the cable beside the last meter if the communication quality is
distorted.

Use RS232/RS485 or USB/RS485 converter with optical isolated output and
surge protection.

30

Chapter 3 Meter Display and Parameter Settings

3.1 Display Panel and Keys

3.2 Metering Data

3.3 Statistics Data

3.4 Demand Data

3.5 Harmonic Data

3.6 Expanded I/O Module Data

3.7 Parameter Settings Mode

3.8 Page Recovery Function

Detailed human-machine interface of the meter will be described in this
chapter. This includes viewing real-time metering data and setting parameters
using dierent key combination.

3.1 Display Panel and Keys

The front of the Acuvim II series meter consists of an LCD screen and four control
keys. All the display segments are illustrated in g 3.1. Users should note that

all the segments will not display in a single page under normal conditions.

1

4

5

6

7

8
9

11
12

13

Fig 3-1 All Display Segments

14

15

16

10

2

3

17

32

SN Display Description

1 Display mode indication

Four lines of “

2

metering area

3 Four “

4 Three “

5 Unbalance, THD, TDD, MAX, MIN

6 Load rate

Four quadrant icon

7

Load type icon

8 1-2, 2-3, 3-1, avg, N

9 Energy icon: Imp, Total, Net, Exp

” digits in the

” and ve “ ” digits

” digits

Shows different modes on the display area. “Meter”
for real-time measurement; “Max/Min” for statistic
data; “Demand” for power demand data; “Harmonic”
for harmonic data; “Setting” for parameters setting;
“Digital I/O” for expanded IO module data.

Main display area: displays metering data such as
voltage, current, power, power factor, frequency,
unbalance, phase angle,etc. Displays statistics such
as maximum and minimum, demand data, display
settings and expanded I/O data.

Displays energy data and real-time clock. Also used
for the setting mode and digital I/O mode display.

Item Icons: “U” for voltage; “I” for current; “P” for active
power; “Q” for reactive power; “S” for apparent power;
“PF” for power factor; “F” for frequency; “
angles; “DMD” for demand; "Mxx" for expanded IO
module type; and display setting page number.

Item Icons: “Unbalance” for unbalance of the voltage
and current; “THD” for total harmonics distortion;
“TDD” for total demand distortion; “MAX” for
maximum and “MIN” for minimum

Displays the percentage of load current to the
nominal current.

: quadrant of the system power

: inductive load; : capacitive load

1, 2, 3 for 3 phase A, B, C; 1-2, 2-3, 3-1 for 3 phase line­to-line AB, BC, CA; avg for average and N for neutral.

Imp: import energy
Exp: export energy
Total: absolute sum of Imp and Exp energy
Net: algebraic sum of Imp and Exp energy

” for phase

33

voltage: V, kV; current: A, kA:active power: kW, MW;
reactive power: kvar, Mvar; apparent power: kVA, MVA;

10 Units measured

11 Communication icon

12 Energy pulse output indicator

Expanded I/O module
indicator

13

Probus module indicator

14

Ethernet module indicator

15

16

17 Time icon

frequency: Hz; active energy: kWh; reactive energy:
kvarh; apparent energy: kVAh; percentage: %; phase
angle: °

No icon: no communication
One icon: query sent
Two icons: query sent and response received

No icon: no pulse output
With icon: icon blinks when sending pulse output

M1: one AXM-IO1 connected
M1x2: two AXM-IO1 connected
None: no AXM-IO1 connected
M2: one AXM-IO2 connected
M2x2: two AXM-IO2 connected
None: no AXM-IO2 connected
M3: one AXM-IO3 connected
M3x2: two AXM-IO3 connected
None: no AXM-IO3 connected

No icon: Probus module not connected
With icon: Probus module connected

No icon: Ethernet module not connected
With icon: Ethernet module connected

Current tari

Time display

There are four keys on the front panel, labeled H, P, E and V/A from left to
right. Use these four keys to read real-time metering data, set parameters and
navigate the meter.

Note: If the LCD backlight is off, pressing any key one time will bring the
backlight on.

34

3.2 Metering Data

Pressing H and V/A simultaneously will activate the display mode selection and
the cursor will ash. Press P or E to move the cursor right or left. To enter the
metering mode, move the cursor to "Meter" then press V/A.

In the metering mode, press P and E simultaneously will enter the TOU mode.

In metering mode, the meter displays measurements such as voltage, current,
power, power factor, phase angle, unbalance etc.

In the TOU mode, meter displays the energy, maximum demand and it's time in
dierent taris.

a) Voltage and Current:

Press V/A to read voltage and current in the metering area. The screen will roll
to the next page when V/A is pressed again. It will go back to the rst screen if
you press V/A at the last screen.

The following gure shows the sequence:

35

Note: When the meter is set to “2LL” or “3LL”, there is no phase voltage or neutral
current display. Therefore, only the third screen (line voltage & avg) and the the
fourth screen (three phase current & avg) will be displayed.

b) Power, Power Factor and Frequency:

Press P to display power related data.

The screen will roll to the next page when P is pressed again. It will go back to
the rst screen if you press P at the last screen.

The following gure shows the sequence:

Note: When the meter is set to “2LL” or “3LL”, only the fth screen (system power)
and the sixth screen (system power factor & frequency) will be displayed.

36

c) Phase Angles and Unbalance:

Press H to display phase angles and unbalance data. The screen will roll to the
next page when H is pressed again. It will go back to the rst screen if you press
H at the last screen.

The following gure shows the sequence:

When using "2LL" or "3LL" wiring setting mode, voltage stands for line to line
voltage. Otherwise, voltage stands for line-to-neutral voltage.

d) Energy:

Press E key to display energy and real time clock. The screen will roll to the next
page when E is pressed again. It will go back to the rst screen if you press E at
the last screen.

Acuvim II series meter can be set to record primary energy or secondary
energy.The unit of energy is kWh for active energy, kvarh for reactive energy
and kVAh for apparent energy. The running time has a resolution of 0.01h.
The meter begins accumulating time upon initial powering up of the unit. The
accumulated time is stored in the non-volatile memory. It can be reset via

37

communication or from the meter front.

The following gure shows the sequence:

e) TOU display

Press “P” and “E” simultaneously to enter the TOU Energy and maximum demand
page. Press “E”display the TOU energy. Press “P”display the TOU maximum
demand. Press again display the TOU maximum demand year,month and date.
Press again display the TOU maximum demand hour, minute and second. Press
“H”would change the taris page. It displays energy under dierent taris in
the energy page. It also displays demand under dierent taris in the maximum
demang page. Press “V/A”would display dierent type energy and maximum
demand. Press “P” and“E” simultaneously to exit current page and return to
metering mode.

38

Sharp Import energy

Sharp Export energy

Sharp import reactive energy

Sharp Export reactive energy

Sharp Apparent energy

Peak Import ene

rgy

……….

Peak Apparent energy

………

Valley Apparent energy

………

Apparent energy

Normal

………

Total Apparent energy

P

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

V/A

Sharp Import max demand

E

P

Sharp Export max demand

E

P

Sharp import reactive max demand

E

P

Sharp Export reactive max de

E

P

Sharp Apparent max demand

E

P

Peak Import max demand

E

P

……….

E

P

Peak Apparent max demand

E

P

………

E

P

Va

E

P

………

E

P

Normal Apparent max deman

E

P

………

E

P

Total Apparent max demand

E

lley Apparent max demand

P

Sharp Import max demand year/month/day

P

P

V/A

Sharp Import max demand hour/min/sec

P

……….

V/A

P

……….

V/A

P

nd

ma

……….

V/A

P

……….

V/A

P

……….

V/A

P

V/A

P

……….

……….

V/A

P

……….

V/A

P

……….

V/A

P

……….

V/A

P

d

V/A

P

……….

……….

V/A

39

3.3 Statistics Data

Pressing H and V/A simultaneously will activate the display mode selection and the cursor will
flash. Press P or E to move the cursor right or left. To enter the statistics data mode, scroll the
cursor to "Max/Min" then press V/A.

In statistics data mode, the meter displays the maximum values and minimum values
for voltage, current, power, power factor, unbalance, demand, THD etc. User should
note that time stamp for the parameters can be viewed only from the software through
communication. No commands are associated with the key H in "Max/Min" display mode.

When P is pressed again, the screen will roll to the next page, and will roll back to the first
screen when pressed at the last page.

When E is pressed the screen will roll back to the previous page, and will roll back to the last
screen when pressed at the first page.

Press V/A to switch the view between maximum and minimum. For example, if t he cu rre nt
display is the maximum phase voltage value, when V/A is pressed, the display
will show the minimum phase voltage value. If V/A is pressed again, the display
will switch back to show the maximum phase voltage value.

The following gure shows the sequence:

40

Note:

i) The gure shows the rolling sequence when pressing P. The sequence will be
reversed when pressing E.

ii) When the meter is set to “2LL” or “3LL”, the first screen(max value of phase
voltage) will not be displayed.

3.4 Demand Data

Pressing H and V/A simultaneously will activate the display mode selection
and the cursor will ash. Press P or E to move the cursor right or left. To enter
demand mode, move the cursor to "Demand" then press V/A.

In the demand data mode, the rst screen displays the demand of active power,
reactive power and apparent power, and the second screen displays the current
demand of phase A, phase B and phase C.

As shown in the gure, system active power demand is 3.285kW, system reactive
power demand is 0 kvar, system apparent power demand is 3.285 kVA.

41

3.5 Harmonic Data

Pressing H and V/A simultaneously will activate the display mode selection
and the cursor will ash. Press P or E to move the cursor right or left. To enter
harmonic mode, move the cursor to "Harmonic" then press V/A.

In the harmonic data mode, meter displays the harmonic ratio of voltage and
current, THD, odd HD, even HD, THFF, CF and KF.

a) Power Quality Data:

Press H to display power quality data. When H is pressed again, the screen will
roll to the next page and will roll back to the rst screen when pressed at the
last page.

No commands are associated with keys P and E in "Harmonic" display mode.

Press V/A to switch to harmonic ratio data display.

42

b) Harmonic Ratio Data

Press H to switch to power quality data display.

The harmonic order will increase by one each time P is pressed and will return

nd

to the 2

The harmonic order will decrease by one each time E is pressed and will return
to the 31

when P is pressed at the 31st (63rd for

st

(63rd for

Acuvim IIR/IIE/IIW

) when E is pressed at the 2nd harmonic.

Acuvim IIR/IIE/IIW

) harmonic.

Press V/A to switch display between voltage harmonics and current harmonics.

The following gure shows the sequence:

43

Note: The gure shows the rolling sequence when pressing P. If E is pressed,

the sequence will reverse.

3.6 Expanded I/O Module Data

Pressing H and V/A simultaneously will activate the display mode selection and
the cursor will ash. Press P or E to move the cursor right or left. To access data
from the expanded I/O modules, move the cursor to "Digital I/O" then press V/A
to enter the expanded I/O module data mode.

In the expanded I/O module data mode, the meter displays the data from
expanded I/O modules, such as DI status, pulse counter number, relay status,
analog input, and analog output etc.

In this mode, the first page is module selection. You can choose to view the
available modules that are attached to the meter. If no expanded I/O modules
are connected, the screen will display "NO IO".

44

a) Module Selection:

No commands are associated with the key H in the module selection screen.

Press P to move the cursor downwards, the cursor will move to the top when it
reaches the bottom. If only one module is connected, Pressing P will have no
eect.

Press E to move the cursor upwards, the cursor will move to the bottom when it
reaches the top. If only one module is connected, Pressing E will have no eect.

Press V/A to select the module and enter the I/O module data selection mode.

As shown in the figure, three modules are connected, AXM-IO11, AXM-IO21,
AXM-IO31, which are indicated by M11, M21, M31 respectively. The cursor
points to M21, which indicates that AXM-IO21 is chosen now.

b) I/O Module Data Selection

Press H to return to module selection screen.

Press P to move the cursor downwards, the cursor will move to the top when
it reaches the bottom. Please note that there are 3 parameters for AXM-IO1, 3
parameters for AXM-IO2 and 4 parameters for AXM-IO3.

45

Press E to move the cursor upwards, the cursor will move to the bottom when it
reaches the top.

Press V/A to select the parameter and enter the display of the data.

c) I/O module data display

Press H to return to I/O module data selection screen.

The screen will roll to the next page each time P is pressed and will return to the
rst page when P is pressed at the last page. If only one page exists, pressing P
will have no eect.

The screen will roll to the last page each time E is pressed and will return to the
last page E is pressed at the rst page. If only one page exists, pressing E will
have no eect.

No commands are associated with the key V/A in this display.

The following gure shows the sequence:

46

47

Note: The gure shows the rolling sequence for using key P. If using E key for
rolling page, the sequence will reverse.

3.7 Parameter Setting Mode

Pressing H and V/A simultaneously will activate the display mode selection
and the cursor will ash. Press P or E to move the cursor right or left. To enter
parameter setting mode, move the cursor to "Setting" then press V/A.

In the parameter setting mode, parameters such as system parameters,
expanded I/O module parameters, alarm parameters and Ethernet module
parameters, can be read and modied.

a) Password Inquiry:

Parameter setting mode is password protected. Before entering the
password and getting into the parameter setting mode, the meter's device

48

communication address will display for 3 seconds. A four digit password (0000
to 9999) is required everytime before accessing the parameter setting mode.
The default password is 0000. After entering the password, press V/A to go to
the parameter selection page. The meter will return to the metering mode if a
wrong password is entered.

The following gure shows the password inquiry page.

To input password:

Press H to move the ashing cursor to the next position.
Press P to increase the number by 1.
Press E to decrease the number by 1.

Press V/A to conrm the password.

b) Parameter Selection Mode

There are four parameters to choose from in the parameter selection manual:
system, expanded I/O module, Ethernet module and alarm.

No commands are associated with the H key in the parameter selection manual.

Press P to move the cursor downwards, the cursor will move to the top when it
reaches the bottom.

49

Press E to move the cursor upwards, the cursor will move to the bottom when it
reaches the top.

Press V/A to select and modify the parameter.The gure shows the parameter
selection page. “SYS” stands for system parameter, “I/O” stands for expanded I/
O module parameter, “NET” stands for Ethernet module parameter and “ALM”
stands for alarm parameter. As shown in the gure, the cursor points to the “SYS”,
which means system parameter is selected.

c) System Parameter Setting

Users can select and modify system parameter in the system parameter setting
mode.

Key functions for selecting a parameter:

Press H to return to parameter selection mode.
The screen will roll to the next page each time P is pressed and will return to the
rst page when P is pressed at the last page.

The screen will roll to the last page each time E is pressed and will return to the
last page when E is pressed at the rst page.

Press V/A to modify the selected parameter.

50

Key functions for modifying the parameter:

Press H to move the ashing cursor to the next position.
Press P to increase the number by 1.
Press E to decrease the number by 1.
Press V/A to conrm the modication and return to parameter selection mode.

The following gure shows the sequence:

51

52

Note: The gure shows the rolling sequence for usingthe P key. If using the E
key for rolling page, the sequence will reverse.

53

d) Expanded I/O Module Parameter

In the expanded I/O module parameter mode, user can choose to view the
available modules that are attached to the meter and modify their parameters.
If no expanded I/O modules are connected, the screen will display "NO IO". To
return to system parameter setting mode main menu, press H (no commands
are associated with other keys in this screen).

Key functions for I/O module selection:

Press H to return to parameter selection mode.

Press P to move the cursor downwards. The cursor will move to the top when it
reaches the bottom. If there is only one module connected, pressing P will have
no eect.

Press E to move the cursor upwards, the cursor will move to the bottom when it
reaches the top.

If there is only one module connected, pressing E will have no eect.

Press V/A to select the module and enter the I/O module parameter setting
mode.

Key functions for setting the I/O module parameter:

Press H to return to I/O module selection mode.

The screen will roll to the next page each time P is pressed and will return to the
rst page when P is pressed at the last page.

The screen will roll to the last page each time E is pressed and will return to the
last page when E is pressed at the rst page.

Press V/A to modify the selected parameter.

54

Key functions for modifying the parameter:

Press H to move the ashing cursor to the next position.
Press P to increase the number by 1.
Press E to decrease the number by 1.
Press V/A to conrm the modication and return to parameter selection mode.
The following table shows the sequence:

55

DI of AXM-IO2 can be used as the pulse counter, each DI function
corresponds to one bit of a 4-bit register. The correspondence bit
of 0 means that the DI works as the digital status input and the
correspondence bit of 1 means that the DI works as the pulse counter. For
example, if the setting value is 0001, it means that DI1 is set as the pulse
counter and other DIs work as digital status inputs.

If the DI works as a pulse counter, when the number of pulses counted
by the DI equals to the pulse constant, the pulse counter will increase
by one. This means that the actual pulse number equals the number of
pulses counted multiplied by the pulse constant.

DO of AXM-IO1 can be used as either alarm output or energy pulse
output. ALM: alarm output; PUL: energy pulse output

Range from 20-1000 ms.

Choose output energy type for DO1. Range from 0-4. 0: no output; 1:
import active energy; 2: export active power; 3: import reactive energy; 4:
export reactive energy.

Follow the DO1 setup method to setup DO2.
If DO type is set as alarm output, DO1 and DO2 output type parameters
will have no eect.

Range from 0 to 3, 0: 0-20mA; 1: 4~20mA; 2: 0-5V; 3: 1-5V.

Be aware that modules with current option cannot be set as voltage type
(i.e. option 2 and 3 are unavailable); modules with voltage option cannot
be set as current type (i.e. option 0 and 1 are unavailable).

For AO1 and AO2 transforming parameter:
Range: 0~29, see Chapter 5 page 99 "AO transforming parameter settings"
for more details.

56

DI of AXM-IO3 can be used as the pulse counter, each DI function
corresponds to one bit of a 4-bit register. The correspondence bit
of 0 means that the DI works as the digital status input and the
correspondence bit of 1 means that the DI works as the pulse counter. For
example, if the setting value is 0001, it means that DI1 is set as the pulse
counter and other DIs work as digital status inputs.

If the DI works as a pulse counter, when the number of pulses counted
by the DI equals to the pulse constant, the pulse counter will increase
by one. This means that the actual pulse number equals the number of
pulses counted multiplied by the pulse constant.

When set as control output, relays have two control methods: latch or
pulse

Relays of AXM-IO3 can be used as alarm output or control output.
ALM:alarm output; CTRL:control output

If relay pulse control method is selected, the relay contact will close for
a preset period and open afterwards. The pulse width range is 50~3000
ms.

Range from 0 to 3. 0: 0~20mA; 1: 4~20mA; 2: 0~5V; 3: 1~5V.
Be aware that modules with current option cannot be set as voltage type
(i.e. option 2 and 3 are unavailable); modules with voltage option cannot
be set as current type (i.e. option 0 and 1 are unavailable).

Note: The gure shows the rolling sequence for using key P. If using E key for
rolling page, the sequence will reverse.

57

e) Ethernet Module Parameter

In the Ethernet module parameter mode, user can view and modify the
parameters. If no Ethernet module is connected, settings will have no eect.

Key functions for nding the Ethernet module parameter:

Press H to return to parameter selection mode.
The screen will roll to the next page each time P is pressed and will return to the
rst page when P is pressed at the last page.
The screen will roll to the last page each time E is pressed and will return to the
last page when E is pressed at the rst page.

Press V/A to modify the selected parameter.

Key functions for modifying the parameter:

Press H to move the ashing cursor to the next position.
Press P to increase the number by 1.
Press E to decrease the number by 1.
Press V/A to conrm the modication and return to parameter selection mode.
The following gure shows the sequence:

58

The selection of DHCP setting: MANU or AUTO

Default setting: MANU

IP address has four segments. Any segment can be set from
0~255.
Default setting: 192.168.1.254

Submask has four segments. Any segment can be set from 0~255.
Default setting: 255.255.255.0

Gateway has four segments. Any segment can be set from 0~255.
Default setting: 192.168.1.1

DNS1 has four segments. Any segment can be set from 0~255.
Default setting: 202.106.0.20

DNS2 has four segments. Any segment can be set from 0~255.
Default setting: 0.0.0.0

Range from 2000-5999, the default value is 502

Range from 6000-9999, the default value is 80

0: No resetting; 1: Reset module after modifying parameters; 2:
Reset module to default values

0:No resetting; 1: Reset password

Note: The gure shows the rolling sequence for using key P. If using E key for
rolling page, the sequence will reverse.

59

f) Alarm Parameter

In the alarm parameter mode, user can view and modify the parameters.

Key functions for nding the alarm parameter:

Press H to return to parameter selection mode.
The screen will roll to the next page each time P is pressed and will return to the
rst page when P is pressed at the last page.
The screen will roll to the last page each time E is pressed and will return to the
last page when E is pressed at the rst page.
Press V/A to modify the selected parameter.

Key functions for modifying the parameter:

Press H to move the ashing cursor to the next position.
Press P to increase the number by 1.
Press E to decrease the number by 1.
Press V/A to conrm the modication and return to parameter selection mode.

The following gure shows the sequence:

60

Yes: Alarm enable; No: Alarm disable

It can be selected as cue signal for alarming.
Yes: backlight ashes upon alarm condition; No: no backlight ashing

There are 16 alarm channels available. Each channel is controlled and enabled
1 bit each from a 16-bit register. Bit value of 1 means that the corresponding
alarm channel is enabled whereas 0 means that the channel is disabled. The
meter will display the value of this 16-bit register in decimal numbers (for
dierent channel combination). For example, 00000 means that all channels
are disabled; 00001 means only the rst channel is enabled; 65535 means that
all channels are enabled. Refer to section 4.4 on page 65 for more details.

"AND" logic relationship can be set among channels. When an "AND" logic is in
place, both channels have to be triggered before the meter sends out the alarm
signal. The logic can be set according to the predened rule (refer to section 4.4
for more details). User can setup up to 8 logic relationships for alarming. Each
logic relationship is controlled and enabled 1 bit each from a 16-bit register (only
the lower 8 bits are used). Bit value of 1 means that the corresponding logic
relationship is enabled whereas 0 means that the relationship is disabled. The
meter will display this 8-bit value in decimal numbers (for dierent relationship
combination). For example, 000 means that all relationships are disabled; 001
means only the rst relationship is enabled; 255 means that all relationships are
enabled.

When DO1 works in alarming mode, a 16-bit register is used to control which
channels are associated with this output. Similar to the alarm channel selection,
this 16-bit value is expressed in decimal when reading on the meter front. For
example, 00000 means that no alarm channels are associated to this output;
00001 means that alarm channel 1 is associated to DO1; 65535 means that all
alarm channels are associated to DO1. Refer to section 4.4 for more details.

If 2 AXM-IO2 modules are attached to the meter, DO1 and DO2 denote to the
rst and the second DO channel of AXM-IO21; DO3 and DO4 denote to the rst
and the second DO channel of AXMIO22 respectively. DO2, DO3 and DO4 use
the same setup method as DO1.

Note: The gure shows the rolling sequence for using key P. If using E for rolling
page, the sequence will reverse.

61

3.8 Page Recovery Function

Acuvim II series meter has a page recovery function. This means that the meter
stores current display page in the non-volatile memory upon power loss and
reloads the page when power recovers. If power goes o when viewing under
the parameter setting mode, the meter will show voltage display when power
recovers. If power goes o when viewing under the expanded I/O module data
mode, and if this expanded I/O module is not connected when power recovers,
the meter will show the voltage display page instead.

62

Chapter 4 Detailed Functions and Software

4.1 Basic Analog Measurements

4.2 Max/Min

4.3 Harmonics and Power Quality Analysis

4.4 Over/Under Limit Alarming

4.5 Data Logging

4.6 Time Of Use(TOU)

4.7 Power Quality Event Logging and Waveform

Capture

The Acuvim II series meter contains advanced metering tools and is able to
measure a multitude of power, energy and power quality parameters. Some
advanced functions may not be accessible directly from the meter front;
therefore, every meter comes with a powerful software that helps access the
information. This chapter introduces these functions and the software.

4.1 Basic Analog Measurements

Acuvim II series meter can measure voltage, current, power, frequency, power
factor, demand, etc. With high accuracy, as shown via the software below:

Fig 4-1 Real-Time Metering

64

Demand:

This meter consists of several types of demand calculation: total active power
demand, total reactive power demand, total apparent power demand, phase A
current demand, phase B current demand, and phase C current demand. When
demand is reset, demand memory registers are set as 0.

Demand calculating mode can be set as sliding window and thermal according
to user. The gure 4-7 shows how it works.

When using the sliding window interval method, user selects an interval from
1 to 30 minutes, which is the period of the calculation. The demand updates
every 1 minute as the window slides once.

Thermal demand method calculates the demand based on a thermal response
which mimics a thermal demand meter. User selects the period for the
calculation and the demand updates at the end of each period.

Energy:

This meter measures and accumulates energy in dierent directions (import and
export). For real-time energy monitoring, it accumulates energy for kWh, kvarh
and kVAh continuous (since its last reset).

Calculating mode

1. User can select dierent energy calculating modes, fundamental based(not
applicable to

Acuvim IIR/IIE/IIW

) or full-wave based either from the meter front
or via communication. Fundamental based calculating is used to accumulate
energy without taking harmonics into consideration while full-wave based
calculating is used to accumulate energy including fundamental and harmonics.

Note: When fundamental based calculating mode is selected, PF calculation will

be based on the fundamental wave.

65

2. There are two ways to calculate reactive energy(power)
Mode 0: real reactive energy

Mode 1: general reactive energy

3. User can choose primary energy or secondary energy either by pressing keys
from the meter front or via communication as shown in gure 4-7.

Note: Acuvim IIR/llE/llW is able to display either primary energy or secondary
energy on the LCD screen; however, it is only able to send out pulses according
to secondary energy via the AXM-IO2 module.

Fig 4-2 Energy and Power Quality Parameters

66

Current direction adjustment

Under normal circumstances, current flows from input terminal 1 to terminal
2 (i.e. from I11 to I12 for phase A current); however, current may flow in the
opposite direction due to incorrect wiring setup. Instead of rewiring the system,
the meter provides users an option to reverse the polarity of the current. By
default, current direction is set as "positive", to reverse the current polarity by
180 degrees, user can set current direction as "negative". Refer to Fig 4.7 for
more details.

Fig 4-3 Max/Min

67

4.2 Max/Min

Acuvim II series meter logs maximum and minimum value statistics for phase/
line voltages, current, power, reactive power, apparent power, power factor,
frequency, demand, unbalance factor, THD as well as the time they occur. All
data is stored in non-volatile memory so that statistic information can be
preserved even when meter is shut o. All maximum and minimum data can be
accessed via communication or from the meter front but time stamps can only
be accessed via communication. Statistics can be cleared via communication or
from the meter front.

4.3 Harmonics and Power Quality Analysis

1. Harmonics

Acuvim II series meter can measure and analyze THD, harmonics (2
Acuvim II,2nd to 63rd for
factor etc. They are shown in gure 4-2.

2. Phase angle:

Phase angle indicates the angle between phase A voltage and other voltage/
current parameters. Angle ranges from 0 to 360 degrees. This function is to
help users nd out the relationship between all input signals avoiding wrong
wiring. When it is set to “2LL” or “3LL”, it gives out the phase angles of u23, i1, i2,
i3 corresponding to u12. For other settings, it gives out the phase angles of u2,
u3, i1, i2, i3 corresponding to u1. They are shown in gure 4-4.

3. Sequence component and unbalance analysis

Acuvim II series meter is able to perform sequential analysis for the input signal.
It looks at the positive sequence, negative sequence and zero sequence of
the fundamental frequency and performs unbalance analysis for voltage and

Acuvim IIR/IIE/IIW

), even HD, odd HD, crest factor, THFF, K

nd

to 31st for

68

current. Sequence components are shown in gure 4-4, unbalance of voltage
and current are shown in gure 4-1.

Fig 4-4 Sequence component and Phase angle

4.4 Over/Under Limit Alarming

Acuvim II series meter has over/under limit alarming capabilites. When the
monitored parameter goes over/under the preset limit and stays at the level
over the preset amount of time delay, the over/under limit alarm will be
triggered. The over/under limit value and its time stamp will be recorded in the
alarming log. The meter can record up to 16 alarming records. When extended

69

I/O modules are attached, digital outputs (DO) and relay outputs (RO) can be
triggered upon alarm conditions and used to activate downstream devices such
as a beacon light or a buzzer.

Before using the alarming function, alarm conditions such as logic dependency,
target setpoint, time delay etc must be set correctly. Settings can be accessed
and modied from the software via communication connection as shown in Fig
4-5.

70

Fig 4-5 Alarm Setting

1. Single Alarming Group Setting

Table 4-1 indicates the rst group of settings, there are 16 groups in total with
the same format.

Address Parameter Range Property

104eH First group: parameter code 0~50 R/W
104fH First group: comparison mode 1:larger,2:equal,3:smaller R/W

1050H First group: setpoint value Related with parameters R/W
1051H First group: delay time 0~3000(*10ms) R/W
1052H First group: output to relay 0:none,1-8:related relay R/W

Table 4-1 First Group of Alarming Settings

Parameter code: select target parameter for alarm monitoring For example:
0-frequency, 44-AI4 sampling data.

Comparison mode: set alarming condition 1: greater than, 2: equal to, 3: smaller
than. For example: if you choose target parameter to be "frequency", condition
to be "greater than" and setpoint to be "50", alarm will be triggered when the
frequency is greater than 50Hz.

Note: setpoint value is the same as the actual value of the selected parameter.

Delay time: If the alarms condition lasts for the preset time period, the alarm
signal will be triggered. The delay range is from 0 to 3000 (unit: 10ms). When it
is set to 0, there is no delay, alarm will be triggered when the alarm condition is
met. If it is set to 20, there will be a 200ms (20 x 10ms) delay.

Output to relay: 0-alarming signal will not be sent to RO; if it is set as 1 and AXM­IO11 is connected, it will output to RO1 when alarm triggers. RO1 will be turned
off when all alarms output to RO1 are cleared. RO2~RO8 work in the same
manner as RO1.

71

Note: If RO is under alarming mode, it can only work in “latch” mode.

After setting up the alarming parameters, user must also setup the global
settings in order for the alarm to work properly.

2. Global settings

Register addresses for global alarm settings are from 1046H~104dH. Please
refer to section 5.3, page 95 "Global alarming settings" for more details.

“Global alarming enable” determines whether the alarming function of the
meter is activated or not. The alarming function is enabled when it is set as "1".

When “Alarming flash enable“ is set as “1”, backlight will flash when alarm is
triggered.

“Alarming channel enable setting” determines whether the corresponding
alarm group is enabled or not. There are 16 groups in all and each one is
corresponding to one bit of a 16-bit register. The corresponding bit must be set
to "1" in order to activate the alarm channel.

Logic "AND" between alarm setting: The 16 alarming records in the meter are
divided into 8 pairs. Each pair has two alarm groups. The two groups can be
logically “AND” by controlling the logic check box. When two groups are “AND”,
alarming triggers only if both AND conditions are met. If the "AND" logic box is
unchecked, the two alarm channels will work independently.

st

The 8 "AND" logic pairs are arranged as follows: 1

, 2nd channel form Pair 1; 3rd,
4th channel form Pair 2; 5th, 6th channel form Pair 3; 7th, 8th channel form Pair 4;
9rd, 10th channel form Pair 5; 11th, 12th channel form Pair 6; 13th, 14th channel form
Pair 7; 15th, 16th channel form Pair 8.

This function is controlled by the lower 8 bits of the 16-bit register and each
bit is corresponding to a pair. “1” means this function is enabled and “0” means

72

disabled.

“Alarming output to DO1 setting”: When “Digital output mode” is set to “1”,
DO1 can be used as alarming output. A 16-bit register is used to perform this
function, its bit0~bit15 correspond to the 1

st

~16th group respectively. When
the related I/O module is connected and is under alarming mode, and if the
corresponding bit is set to 1 and the alarming condition is met, alarm signal will
be sent to DO1. DO1 will be turned o when all alarms correspond to DO1 are
cleared. If related bit is set to 0, that alarm channel will not issue alarm signal to
DO1. DO2~DO4 work in the same manner DO1.

After completing the setup steps correctly, alarming function can be used.

3. Setting Example

Here is an example showing how to apply the logic "AND" function for a pair of
alarm channels.

st

The conditions are as follows: I1 greater than 180A, delay 5s for the 1

alarm
channel; U1 less than 9980V, delay 10s for the 2nd alarm channel. No alarm
signals will be sent to outputs. The CT primary value of I1 is 200A, and CT2 is
5A. The PT ratio for U1 is 10000:100. The following shows how all the related
registers are to be set.

Settings of rst group:

“Parameter code (104eH)” is set to 9, which stands for I1.

“Comparison mode (104fH)” is set to 1, which stands for "greater than".

“Setpoint value (1050H)” is set to 4500, according to the relationship between
actual value and communication value (I=Rx * (CT1/CT2) /1000).

“Delay time (1051H)” is set to 500, so the actual delay time is 500*10ms=5s.

73

“Output to relay (1052H)” is set to 0, because there is no output to RO.

Settings of second group:

“Parameter code (1053H)” is set to 1, which stands for U1.

“Comparison mode (1054H)” is set to 3, which stands for "smaller than".

“Setpoint value (1055H)” is set to 998, according to the relationship between
actual value and communication value (U=Rx X (PT1/PT2) /10).

“Delay time (1056H)” is set to 1000, so the actual delay time is 1000*10ms=10s.

“Output to relay (1057H)” is set to 0, because there is no output to RO.

Global settings:

“Alarming channel enable setting (1048H)” set to 0003H to enable the rst and
the second channel.

“Logic "AND" between alarming setting (1049H)” set to 0001H to enable logic
"AND" in Pair 1.

“Alarming output to DO1 setting (104aH)” set to 0, since no output to DO1.

“Alarming output to DO2 setting (104bH)” set to 0.

“Alarming output to DO3 setting (104cH)” set to 0.

“Alarming output to DO4 setting (104dH)” set to 0.

“Alarming flash enable (1047H)” set to 0 to disable backlight flashing when
alarming occurs.

“Global alarming enable (1046H)” set to 1 to enable over/under limit alarming.

4. Records of Alarming Event

74

Acuvim II series meter has built in alarm logging capabilities. 16 entries can
be recorded in total. The record sequence of these entries do not depend
on the sequence of the 16 alarm channels. The meter begins logging alarm
status starting from the 1st record location to the last one. Alarm logs are being
recorded in a "cycle" fashion which means the latest event will overwrite the
oldest record. When over/under limit parameters return to normal, its value and
time stamp will be recorded as well. Therefore, users can determine the over/
under limit duration by checking the time dierence.

st

Here is the 1

Address Parameter Range

42acH~42b2H

group of records. Other groups of records have the same format.

42a9H First group: alarming status 0~65535
42aaH First group: parameter code 0~50
42abH First group: over/under limit or reset value Related with parameters

First group:
occur time: yyyy:mm:dd:hh:mm:ss:ms

Table 4-2 Alarming status of the 1st group of record

time

“Alarming status” indicates information of current alarm status. It is a 16-bit
unsigned integer. Parameter code is stored in the higher 8 bits. Bit1 indicates
whether logic "AND" is enabled or not, 1 means enabled and 0 means not. Bit0
indicates whether alarming has occured or recovered, 1 means occurred and 0
means recovered.Undened bits are 0.

“Parameter code” species the monitored parameter.

“Value” shows the recorded value of the selected parameter when an alarm is
triggered and when it recovers.

“Time” indicates the time stamp with the accuracy in milliseconds (ms).

75

Alarming event will set bit0 of “system status (102eH)” to be 1. At the same time,
corresponding ags will be set to 1 to indicate new data. The ag will be cleared
after the data is read. Bit0 of “system status (102eH)” will be set to 0.

Note: Although no alarming records will be lost during meter power o, alarm
status will start recording from the 1

st

alarm log entry when meter is powered

on again.

Here is an example:

Fig 4-6 Alarming records

76

Fig 4-7 basic settings

77

4.5 Data Logging

Acuvim IIR/IIE/IIW

The
interval.This meter has 4 MegaBytes of memory which gives it extensive data­logging capabilities. It has a real-time clock that allows logs to be time-stamped
when log events are created.

1. Data log settings

Acuvim IIR/IIE/IIW

The
independently programmed with individual settings, meaning that each can be
used to monitor dierent parameters. You can program up to 117 parameters
per log. You also have the ability to allocate available system resources among
the three logs, to increase or decrease the size of the individual historical logs.
The total size is no more than 63 sectors that has 64k bytes. The data log 1
setting is shown in Fig 4-8.

meter provides data logging that records the data at a set

meter has three sets of historical data logs. Each log can be

78

Fig 4-8 The data log 1 setting

Having three sets of historical logs provides you with the option of
programming each log with unique parameters. For example, you can program
Historical Log 1 to record measured values parameters (for example, Frequency,
Voltage, Current), Log 2 to record energy values parameters, and Log 3 to record
power quality parameters. Historical Log parameters can be selected from the
following thirteen groups:

• Real-Time Metering (Frequency; Instantaneous Voltage; Instantaneous Current;

Total and Per Phase Power and Power Factor; Neutral Current ; unbalance V/I;
load type; Current demand; and Per Phase/ Total Power demand)

• Energy (Ep_imp; Ep_exp; Ep_total; Ep_net; Eq_imp; Eq_exp; Eq_total; Eq_net

and Es)

nd

• THD Volts AN/AB(THD, 2

-63rd Harmonic Magnitudes, ODD, EVEN, CF and THFF

of Volts AN/AB)

nd

• THD Volts BN/BC (THD,2

-63rd Harmonic Magnitudes,ODD,EVEN,CF and THFF of

Volts BN/BC)

nd

• THD Volts CN/CA (THD, average THD, 2

-63rd Harmonic Magnitudes, ODD, EVEN,

CF and THFF of Volts CN/CA)

nd

• THD IA (THD, 2

• THD IB (THD, 2

• THD IC (THD, average THD, 2

-63rd Harmonic Magnitudes, ODD, EVEN, KF of IA)

nd

-63rd Harmonic Magnitudes, ODD, EVEN, KF of IB)

nd

-63rd Harmonic Magnitudes, ODD, EVEN, KF of IC)

• Sequence Component (positive, negative and zero sequence)

• Phase Angles(the angle between U1 and other voltage and current parameters.)

• DI Counter (the DI numbers of the IO modules)

• AO/AI Raw Value (the AO output register values and the AI sample register

79

values)

• AO/AI Value(the AO output values and the AI sample values)

The following procedures show how to select and store parameters in historical
log 1. The Group eld determines the items that are available for selection.

1) Select a Group. The possible selections are: Real-Time Metering, Energy,
THD Volts AN/AB, THD Volts BN/BC , THD Volts CN/CA , THD IA , THD IB , THD IC,
Sequence Component, Phase Angles, DI Counter, AO/AI Raw Value and AO/AI
Value.

2) Select items for your log:

a. Highlight the parameter(s) you want to log into the meter's memory.
b. Click Add to add the parameter to the Selected Parameter Area.
c. To remove parameter(s), highlight them in the Selected Parameter Area and
click Remove.

3) Set the logging interval (in minutes). Interval can be set from 0 - 1444
minutes according to dierent application.

The logging interval determines when the meter takes a snapshot.When
interval is set as 0, the set of historical data log is disabled.

4) There are 63 sectors in total for the 3 historical data logs. User can assign
dierent sector size to each log according to dierent applications (as long as
the total sector sizes of the 3 logs do not exceed 63).

5) When Enable is selected for the logging timer, users can specify the start time
(to start data logging) and the end time (to stop data logging). The meter will
take snapshots of the selected parameters according to the logging interval

80

within the specied time period.

NOTES:

• Data logging will stop when the allocated memory for the historical data log

is full if the logging timer mode is enabled, no stored data will be erased in this
mode. If the logging timer mode is disabled then when the historical data log
is full, the first sector of this log will be erased and overwritten by the latest
records. The following sector (i.e. the original second sector for the log) will
become the rst sector.

• If the memory of the historical data log is full, the meter will erase the rst

sector in which the memory size is 65536 bytes (64kb). The following sector
(the second sector) will become the rst sector and the data from the erased
sector will not be recoverable. Therefore, user should save the whole log before
memory is full to maintain all the data.

• There are two display elds at the bottom of the data log setting screen. They

show the registers in the logs ,the total bytes used and the bytes remaining
for this historical log. These elds are updated as you make selections on the
screen. The total number of bytes available per log record is approximately 234.

2. Retrieving logs

There are two ways of retrieving the logs: "read one window" and "read all".The
retrieval screen is shown in Fig 4-9.

81

Fig 4-9 Retrieval screen

The "read one window" method allows you to access and read a specific
log location at an offset from the first log. The "window record num" is the
maximum number of record entries the software can read at a time, it is
calculated by 246 / Record Size. The larger this number is, the faster data can
be retrieved. Log type is the logs you want to retrieve, for example, log type 0 is
data logging 1,log type 1 is data logging 2 and log type 2 is data logging 3.

The "read all" method accesses and reads the historical data log automatically,
the oset increases automatically until all the logs are retrieved.

The data logs contents are shown at the bottom of the page.

82

4.6 Time of use (TOU)

User can assign up to 4 different tariffs (sharp, peak, valleyand normal) to
dierent time period within a day according to the billing requirements. The
meter will calculate and accumulate energy to dierent taris according to the
meter’s internal clock timing and TOU settings.

TOU setting: User can set a maximum of 12 TOU seasons, each season can be
assigned to a TOU schedule (a maximum of 14 TOU schedules are available).
Each schedule can be divided up into 14 segments (in which each segment can
have its own tari ).User can customize the TOU calendar (including its taris,
seasons, schedules and segments) according to dierent applications. To make
sure that the TOU calendar is setup correctly, the meter will check the TOU
settings according to the predened rules (see below for “TOU setting format
requirement” for details).TOU function will be disabled if the TOU calendar is
set up incorrectly. If no errors are found in the calendar and the TOU function is
enabled, TOU energyaccumulation will begin.

TOU setting format requirement:

1. Season setting parameter: The calendar year will be divided up into dierent
seasons depending on the season setting parameter. The parameter can be
selected from any integer between 1 to 12. User must enter the correct value
for the season setting parameter in accordance to the TOU season table. If the
season setting parameter is set as 2, the first 2 slots of the TOU season table
must be set, otherwise it will be considered as an invalid input (TOU function
will be disabled).

2. TOU season format: Enter the start date into the TOU season table slot
following this format “MM-DD ID” - MM stands for the month, DD stands for the
day and ID stands for the TOU schedule ID (available from 01 to 14). The dates
should be organized so that they are in sequence according to the calendar

83

year (the earlier date comes rst and the later date comes last). For example, if 3
seasons are selected, the date parameters are January 1, June 6 and September 7,
and TOU schedule 02, 01, 03 will be used respectively, the rst TOU season table
slot shall enter 01-01 02, the second slot shall enter 06-06 01, and the third slot
shall enter 09-07 03. Entering 01-01 02 for the rst slot, 09-07 03 for the second
slot and 06-06 01 for the third slot is considered invalid.

3. Schedule setting parameter: The number of available TOU schedules
depends on the schedule setting parameter. The parameter can be selected
from any integer between 1 to 14. This parameter determines the number of
TOU schedules available for the TOU calendar setting. A maximum of 14 TOU
schedules (from TOU Schedule #1 to TOU Schedule #14) can be used.

4. Segment setting parameter: Each TOU schedule consists of various timing
segments. The number of segments depends on the segment setting
parameter setup. The parameter can be selected from any integer between 1
to 14 (inclusively). User must enter the correct value for the segment setting
parameter in accordance to the TOU schedule table. If the segment setting
parameter is set as 3, the first 3 slots of the TOU schedule table must be set,
otherwise, it will be considered as an invalid input (TOU function will be
disabled).

5. TOU schedule format: Each TOU schedule represents a 24 hour cycle. Similar
to TOU season format, enter the start time into the TOU schedule table slot
following this format “HH:MM ID” - HH stands for hour (in 24 hr format), MM
stands for minutes and ID stands for tariffs (available from 00 to 03). The
time should be organized according to the hour sequence. For example, if 3
segments are selected, timing parameters are 01:00, 15:30, 22:45, the order of
the 3 segments should be one of the following: 01:00, 15:30, 22:45 or 15:30,
22:45, 01:00 or 22:45, 01:00, 15:30 Entering time information in a wrong
sequence (for example, entering 15:30, 01:00, 22:45) is considered as an invalid
operation, TOU function will be disabled.

84

6. Tari setting parameter: This parameter corresponds to the number of taris

available for the TOU calendar and can be selected from any integer from 0 to 3.
The four taris: sharp, peak, valley and normal are represented by 4 integers: 0,
1, 2 and 3 respectively. If the tari setting parameter is set to 3, all of the 4 taris
will be available for the TOU calendar; if the parameter is set to 1, only the rst 2
taris (sharp and peak) will be available.

7. Holiday setting parameter: This parameter can be set from any integer
between 1 and 30, meaning a maximum of 30 holidays can be programmed to
the TOU calendar. If the holiday setting parameter is set as 3, the rst 3 slots of
the holiday schedule must be set, otherwise it will be considered as an invalid
input (TOU function will be disabled).

Note: User can either customize the TOU calendar factory settings or use the
default factory settings. User can reset the TOU calendar to its default value
either via communication or from the meter front.

8. Holiday schedule: The holiday schedule uses the same format as the TOU
seasons “MM-DD ID”. User can select which TOU schedule to be used for the
holiday. The dates of the holiday schedule do not need to be organized in
a sequential order (i.e. the first slot can be January 1, the second slot can be
December 26 and the third slot can be December 25).

9. Daylight saving time (DST): Daylight saving time can be enabled in one of two
formats: The xed date option, or a xed day of one of the weeks in the month
(also named as the non-fixed date option). if you choose a fixed date option,
you set the format according to a xed date, for the daylight saving time switch:
the format month / day / hour / minute / adjust time (in minutes). If you choose
non-xed date option, DST will be implemented by which day of which week,
whose setting format is month/which day (i. e. Tuesday)/which week (i. e. 1st
week)/hour/minute/adjust time(in minutes).

85

By using the function, you can cause the instrument to automatically switch
to and from daylight saving time. When the clock starts to run to daylight
saving time, the meter will automatically adjust the clock to a time period in
advance, while the clock is running to the end of daylight saving time, meter
will automatically adjust the clock pushed back to a time period, as shown in
Fig 4-10

Fig 4-10 Daylight saving time setting interface

10. Ten-year Holiday setting

Users can preset holidays of the next decade via the meter software. The holiday
format is month/day/year; holiday code; holiday schedule. After the format
setup, click on "Make Holiday Settings (10 year)", then a holiday table for the

86

next decade will be generated.

Holiday Auto Switch: When Ten-year Holiday is enabled, if the current year of
the meter falls into the Ten-year Holiday setting, it automatically loads the Ten­year Holiday settings into the current TOU settings. If the current year of the
meter does not fall into the Ten-year Holiday setting, it remains the current TOU
settings.

Fig 4-11 ten years holiday table

11. Weekend Schedule: When Weekend schedule is set as 0, it is disabled.
When Weekend schedule is set as 1, it means Sunday eective. When Weekend
schedule is set as 2, it means Saturday eective. When weekend schedule is set

87

as 3, it means both Saturday and Sunday eective. When Weekend schedule is
enabled, bit0 means Sunday; bit1~bit6 mean Monday to Saturday. When the
meter clock is within the period of weekly interval, energy will accumulate to
the tari associated with the weekend schedule setting.

The software takes in decimal number for weekend setting. For example, if
Saturday, Sunday, Monday are eective, the number 112 (64+32+16) needs to
be entered for the weekend setting.

Note: Holiday schedule has the highest priority among all the schedules.
Weekend schedule's priority is followed by Holiday schedule. When Holiday
schedule is not enabled, Weekend schedule has the highest priority, overiding
the normal (weekday) schedule.

Acuvim IIE can record maximum power and current demand under different
tariffs, as well as the time stamp of the maximum value. It can also clear the
maximum demand under diferent tarifs.

Except normal energy parameter readings, Acuvim IIE has 2 separate logs:
Current Month TOU and Prior Month TOU. When setup appropriately and when
TOU is enabled, energy will be accumulated in a month-to-month basis. The
current energy usage will be stored under Current Month TOU and is divided up
into dierent taris. When next month (or counting period) starts, all Current
Month TOU values will be moved to Prior Month TOU.

There are two ways of automatic resetting of current month TOU.

1.End of Month: This is the default method. All values from Current Month TOU
will be copied over to Prior Month TOU at the very beginning of each month (the
frst day of eachmonth at time 00: 00: 00). Current Month TOU will be cleared and
reset to 0.

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2.Assigned Clock: User can select when the values from Current Month TOU
would be copied over to Prior Month TOU. User can set the time in the following
format “DD HH: MM: SS” - DD stands for day, HH stands for hour, MM stands
for minute, SS stands forsecond. Similar to the previous method, once Current
Month TOU is transferred to Prior Month TOU, all values from Current Month
TOU will be cleared and reset to 0.

4.7 Power Quality Event Logging and Waveform Capture

Power Quality Event Logging

When a power quality event happens, such as voltage sag and swell, Acuvim IIW
will record the event timestamp and the triggering condition. It can save up to
50,000 events.

1. Event Logging Data format

Timestamp (4 words) + Triggering Condition (1 word) + Rated Value (1 word) +
Threshold (1 word) + Half Cycle Count (1 word)

Each event has 8 words in total.

Event Time: W1: Year—High Byte; Month-Low Byte; W2:Day-High Byte, Hour—
Low Byte; W3:Minute—High Byte; Second—Low Byte; W4: Millisecond

Triggering Condition: W5—Voltage Sags or Voltage Swells (0: logging disabled; 1:
voltage sag; 2: voltage swell)

Rated Value: W6—Voltage rated value;

Threshold: W7—Threshold for voltage sag and swell.

Half Cycle count: W8 (Voltage Swell: 0; Voltage Sag: 4—200)

2. Logging Events

The event logging feature can log 50000 events. If the 50000 events are full, no
more events will be logged even if the triggering condition happens. The user

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must clear the event log, and then the logging will log the new event. When
the log is cleared, the new event will be logged from the rst event happening.
There will be no data loss after the power is o.

3. Event Logging Triggering Conditions

1)Voltage Sag

When any phase of the three phase voltage is lower than the set value (voltage
rated value x threshold %), there will be a Voltage Sag event. One or two phase
of the three phase voltage sags does not inuence the other voltage response
to the voltage sag monitoring. In other words, if the voltage sag happens again
at the same time, a new voltage sag event will still be logged. Only when the
voltage phase in the voltage sag condition restores back to normal, this phase
can response to the new voltage sag event.

2)Voltage Swell

When any phase of the three phase voltage is higher than the set value (voltage
rated value x threshold %), there will be an Voltage Swell event. When one
phase Voltage Swell happens, the other phase will not respond to Voltage Swell
event logging. Only when all of the phases voltage restore back to normal, a
new Voltage Swell event will be responded.

Note:

The following gure depicts how to set the parameters for Power Quality Event
Logging and Waveform Capture. In the parameter settings, Voltage Sag and
Voltage Swell share the same voltage rated value. The parameters for event
logging includes: voltage rated value, voltage sag threshold, voltage sag half
cycle count and voltage swell threshold. Those parameters also t voltage sag
waveform capture. The other triggering conditions for Waveform Capture can
be set when necessary. When the Waveform Capture triggering by Voltage Sag
and Voltage Swell is enabled, the corresponding event log and waveform will be
recorded when Voltage Sag or Voltage Swell happens.

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4. Event Log Retrieve

When a new event log commences, the newest event number
address(0X8CFDH)contains the newest event number. When the log is being
retrieved, the starting event log number (0X8CFEH) and the event quantity for
each retrieve (0X8CFF) must be set correctly. It must be ensured that the starting
number of event log should equal or smaller than the newest log number.
When setup is correct, reading registers 0X8D00H—0X8D4FH will acquire the
event log data. Each time a maximum of 10 logged events can be retrieved. The

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event log retrieve page is in the gure below. The Modbus register address of
the event log is in the table below (see details in Chapter 6).

8CFDH The newest event number word R Range: 1~50000

8CFEH The starting event log number word R/W Range: 1-50000

8CFFH The event quantity of each time

retrieve

word R/W 1-10

0: No event

Note: smaller than or
equal to the newest
event number.

Waveform Capture

Acuvim IIW can record 8 groups of voltage and current waveform data at a
sampling rate of 32 points per cycle. It provides the captured waveform of 8
cycles before and after the triggering point (including U1,U2,U3,I1,I2,I3). The
triggering condition is settable.

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1. Waveform Capture Data Format

Timestamp(7 words)+ Triggering Condition(9 words)+ U1, U2, U3, I1, I2,
I3(Before triggering point 8 waveforms 32 x 8 x 6 words)+ U1, U2, U3, I1, I2,
I3(After triggering point 8 waveforms 32x8x6 words).

Timestamp: Year(W1), Month(W2), Day(W3), Hour(W4), Minute(W5),
Second(W6), Millisecond(W7)

Triggering Condition:

W8—Manual Triggering (0: disable; 1: enable);

W9— AXM-11 DI Triggering (bit1bit0: DI1(bit3bit2: DI2)bit5bit4: DI3; bit7bit6:
DI4; bit9bit8: DI5; bit11bit10: DI6 );

W10—AXM-21 DI Triggering (bit1bit0: DI7; bit3bit2 : DI8; bit5bit4: DI9; bit7bit6:
DI10);

W11—AXM-31 DI Triggering (bit1bit0: DI11; bit3bit2 : DI12; bit5bit4: DI13;
bit7bit6: DI14);

(Two bits meaning: 00: No DI Triggering; 01: DI Triggering from OFF to ON; 10: DI
Triggering From On to OFF)

W12— Voltage Sag Triggering(0 : disable; 1: enable);

W13— Voltage Swell Triggering(0 : disable; 1: enable);

W14— Over-current Triggering(0 : disable; 1: enable);

W15,W16----0(Reserved)

Waveform Order:

Before triggering point 8 U1 waveforms, 8 U2 waveforms, 8 U3 waveforms, 8 I1
waveforms, 8 I2 waveforms, 8 I3 waveforms.

After triggering point 8 U1 waveforms, 8 U2 waveforms, 8 U3 waveforms, 8 I1
waveforms, 8 I2 waveforms, 8 I3 waveforms.

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2. Waveform Capture Group

Waveform Capture can log up to8 groups of waveform data. When the 8 group
data is full, it does not respond to any waveform triggering condition. Only
when all the waveform data is reset / emptied, waveform capturing function will
be normal. When the waveform data is emptied, new waveform data starts from
the 1st group. The waveform data will not be lost when the power is o.

Note: since the amount of each waveform group data is large, it takes more time
to write into the flash memory. Therefore, Waveform Capture only responds
to one triggering condition at one time. During the process of writing data
into the ash memory, it does not respond to new triggering condition. After
the process of memory writing, it will respond to new waveform triggering
condition.

3. Waveform Capture Triggering Condition

1) Manual Triggering

Manually trigger one group waveform capture.

2) DI Triggering

DI Triggering must fulll the following two conditions at the same time.

•IO modules with the logical address of 1 (AXM-IO11, AXM-IO21, AXM-IO31).

•DI channel type is set as “State”.

The Modbus address assigns two bits for the DI channel. When they are set
as “00”, it means DI Triggering Disabled; “01” means DI Triggering will be
implemented when DI state changes from OFF to ON; “10” means DI Triggering
will be implemented when DI state changes from ON to OFF; “11 “means DI
Triggering will be implemented when DI state has any change.

3) Voltage Sag Triggering

As mentioned in Voltage Sag event logging, when Voltage Sag Triggering

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Waveform is enabled, both event logging and waveform capture will be
implemented at the same time once a voltage sag happens.

4) Voltage Swell Triggering

As mentioned in Voltage Swell event logging, when Voltage Swell Triggering
Waveform is enabled, both event logging and waveform capture will be
implemented at the same time once a voltage swell happens.

5) Over-current Triggering

When Over-current Triggering is enabled, if any phase of the three phase
current is higher than the set value (rated value x thredshold %), the waveform
capture will be implemented. If one phase is over-current, any other phase over­current cannot implement the waveform capture. Only when all of the phase
current restore back to normal, waveform capture will be responding.

4. Waveform Capture Retrieve

In Modbus address section, only one group of waveform is saved. When there
is waveform data and it is being retrieved, rstly write group number 1-8 into
Waveform Group Number for Retrieving address(0X801FH), the group number
written in must be smaller or equal to the Newest Waveform Group Number,
otherwise the writing operation will be invalid and the desired waveform
cannot be retrieved. After the group number is written correctly, read waveform
data addresses (0X8020H-0X8C2FH) in order to get the written group number
waveform data.

The relationship between voltage waveform value and real value:

Real Value(unit: V)= Waveform Value x 0.420675

The relationship between current waveform value and real value:

Real Value(unit: V)== Waveform Value x 0.01463866

The voltage and current value obtained from the waveform are the PT or CT

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