IEC 62623:2012

IEC 62623 ®
Edition 1.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Desktop and notebook computers – Measurement of energy consumption

Ordinateurs de bureau et ordinateurs portables – Mesure de la consommation
d'énergie
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IEC 62623 ®
Edition 1.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Desktop and notebook computers – Measurement of energy consumption

Ordinateurs de bureau et ordinateurs portables – Mesure de la consommation

d'énergie
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 35.160 ISBN 978-2-83220-467-2

– 2 – 62623 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 10
4 Specifications for EUT . 11
4.1 Computer descriptions . 11
4.1.1 Desktop computer . 11
4.1.2 Notebook computer . 11
4.1.3 Integrated desktop computer . 11
4.2 Power modes . 11
4.2.1 Off mode . 11
4.2.2 P . 12
off
4.2.3 Sleep mode . 12
4.2.4 P . 12
sleep
4.2.5 P . 12
sleepWoL
4.2.6 On mode . 12
4.2.7 P . 12
on
4.2.8 Idle modes . 12
4.2.9 Active (work) mode . 13
4.2.10 P . 13
work
4.3 Profile attributes . 13
4.3.1 Profile . 13
4.3.2 Majority profile . 13
4.3.3 Minority profile . 13
4.3.4 Profile study . 13
4.3.5 Product active power ratio . 14
4.3.6 PAPR . 14
4.3.7 PAWR . 14
4.3.8 Product TEC error . 14
4.3.9 Profile TEC error . 14
4.4 Categorisation attributes . 14
4.4.1 General . 14
4.4.2 Cores . 14
4.4.3 Channels of memory . 14
4.4.4 System memory . 14
4.4.5 System fan . 14
4.4.6 TEC adders . 15
5 Test procedure and conditions, categorisation, TEC formula, meter specifications
and results reporting . 15
5.1 General . 15
5.2 Test setup . 15
5.3 Test procedure . 17
5.3.1 General . 17

62623 © IEC:2012 – 3 –
5.3.2 Measuring off mode . 17
5.3.3 Measuring sleep mode . 17
5.3.4 Measuring long idle mode . 17
5.3.5 Measuring short idle mode . 17
5.3.6 Measuring active mode (optional, see 5.6) . 18
5.4 Test conditions . 18
5.5 Categorisation . 19
5.5.1 General . 19
5.5.2 ULE category . 19
5.5.3 TEC adders . 19
5.6 Annualised energy consumption formulas . 20
5.6.1 General . 20
5.6.2 Estimated annualised energy consumption formula (estimated active
workload). 20
5.6.3 Measured annualised energy consumption formula (with an active
workload). 20
5.6.4 Criteria for an active workload . 21
5.7 True RMS watt meter specification . 22
5.8 True RMS watt meter accuracy . 22
5.9 Ambient light meter specification . 24
5.10 Reporting of results . 24
Annex A (informative) Overview of profile methodology. 26
Annex B (informative) Majority profile . 28
Annex C (informative) Method for conducting a profile study . 30
Annex D (informative) Sample TEC calculations . 34
Annex E (informative) ENERGY STAR V5 compliant testing methodology . 37
Annex F (informative) Power measurement methodology . 39
Annex G (normative) Procedure for the registration of categories for IEC 62623 . 43
Bibliography . 45

Figure 1 – Typical test setup . 16
Figure 2 – Example of estimated annualised energy consumption formula (estimated
active workload) . 20
Figure 3 – Measured annualised energy consumption formula (with an active
workload) . 21
Figure A.1 – Example of a typical profile . 27
Figure B.1 – TEC error summary chart . 29

Table 1 – Test conditions . 18
Table B.1 – Duty cycle attributes for the enterprise majority profile duty cycle study . 28
Table B.2 – Summary of the enterprise energy study . 29
Table C.1 – Profile study 1 . 31
Table C.2 – ENERGY STAR® V5 computer study . 31
Table C.3 – Profile study, duty cycles . 32
Table C.4 – Profile study, TEC and TEC calculations . 32
actual estimated
Table E.1 – Duty cycle attributes for V5 compliant testing . 38

– 4 – 62623 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DESKTOP AND NOTEBOOK COMPUTERS –
MEASUREMENT OF ENERGY CONSUMPTION

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62623 has been prepared by IEC technical committee 108: Safety
of electronic equipment within the field of audio/video, information technology and
communication technology.
This standard is based on ECMA-383.
The text of this standard is based on the following documents:
FDIS Report on voting
108/490/FDIS 108/500/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

62623 © IEC:2012 – 5 –
In this standard, the following print types or formats are used:
– requirements proper and normative annexes: in roman type;
– notes/explanatory matter: in smaller roman type;
– terms that are defined in 3.1: bold.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication
indicates that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – 62623 © IEC:2012
INTRODUCTION
This standard is based on ECMA-383 and complements the guidance given in IEC 62075. It
includes the definitions of energy saving modes and generic energy saving guidance for
designers of desktop and notebook computers, by defining a methodology on how to measure
the energy consumption of a product whilst providing categorisation criteria that enable
energy consumption comparisons of similar products.

62623 © IEC:2012 – 7 –
DESKTOP AND NOTEBOOK COMPUTERS –
MEASUREMENT OF ENERGY CONSUMPTION

1 Scope
This International Standard covers personal computing products. It applies to desktop and
notebook computers as defined in 4.1 that are marketed as final products and that are
hereafter referred to as the equipment under test (EUT) or product.
This standard specifies:
– a test procedure to enable the measurement of the power and/or energy consumption in
each of the EUT's power modes;
– formulas for calculating the typical energy consumption (TEC) for a given period
(normally annual);
– a majority profile that should be used with this standard which enables conversion of
average power into energy within the TEC formulas;
– a system of categorisation enabling like for like comparisons of energy consumption
between EUTs;
– a pre-defined format for the presentation of results.
This standard does not set any pass/fail criteria for the EUTs. Users of the test results should
define such criteria.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
ECMA-389, Procedure for the Registration of Categories for ECMA-383 2nd edition
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
active workload
simulated amount of productive or operative activity that the EUT performs as represented in
the P (see 4.2.10) and T (see 3.1.13.6) attributes of the TEC equation (see 5.6)
work work
3.1.2
category
grouping of EUT configurations
3.1.3
duty cycle
divisions of time the EUT spends in each of its individual power modes

– 8 – 62623 © IEC:2012
Note 1 to entry: A duty cycle is expressed as a percentage totalling 1.
3.1.4
energy use
energy used by a product then measured from the mains power supply over a given period of
time
Note 1 to entry: Energy is measured in kilowatt hour.
3.1.5
external power supply
EPS
equipment contained in a separate physical enclosure external to the computer casing and
designed to convert mains power supply to lower d.c. voltage(s) for the purpose of powering
the computer
Note 1 to entry: This note applies to the French language only.
Note 2 to entry: The EPS is sometimes referred to as an a.c. brick.
Note 3 to entry: A reference to a document which outlines the testing procedures for measuring EPS efficiencies
(External Power Supply Efficiency Test Method) can be found in the Bibliography.
3.1.6
internal power supply
IPS
component contained in the same physical enclosure to the computer casing and designed to
convert mains power supply to lower d.c. voltage(s) for the purpose of powering the computer
Note 1 to entry: This note applies to the French language only.
Note 2 to entry: A reference to a document which outlines the testing procedures for measuring IPS efficiencies
(Generalized Internal Power Supply Efficiency Test Protocol) can be found in the Bibliography.
3.1.7
local area network
LAN
computer network located on a user’s premises within a limited geographical area
[SOURCE : IEC 60050-732:2010, 732-01-04]
Note 1 to entry: This note applies to the French language only.
Note 2 to entry: Currently the two primary technologies used in computers are IEEE 802.3 Ethernet or Wired LAN,
and IEEE 802.11 WiFi or Wireless LAN.
3.1.8
manufacturer
organization responsible for the design, development and production of a product in view of
its being placed on the market, regardless of whether these operations are carried out by that
organization itself or on its behalf
3.1.9
red green blue
RGB
primary colours that make up a pixel on a computer display
Note 1 to entry: The RGB values represent the intensity settings of each colour of that pixel to specify an exact
colour.
62623 © IEC:2012 – 9 –
3.1.10
typical energy consumption
TEC
number for the consumption of energy of a computer that is used to compare the energy
performance of like computers, which focuses on the typical energy consumed by an EUT for
a given profile while in normal operation during a representative period of time
Note 1 to entry: This note applies to the French language only.
Note 2 to entry: For desktops and notebook computers, the key criterion of the TEC approach is a value for
typical annual energy use, measured in kilowatt-hours (kWh), using measurements of average operational mode
power levels scaled by an assumed typical duty cycle that represent annualized use for a profile.
3.1.11
actual energy consumption
TEC measured using P
work
Note 1 to entry: The actual energy consumption is referenced as TEC .
actual
3.1.12
estimated energy consumption
TEC estimated by substituting P for P
sidle work
Note 1 to entry: The estimated energy consumption is referenced as TEC .
estimated
Note 2 to entry: P is defined in detail in 4.2.
sidle
Note 3 to entry: P is defined in detail in 4.2.
work
3.1.13
duty cycle attributes
the percentage of time the EUT spends in each of its individual power modes
Note 1 to entry: Examples of duty cycle attributes are defined in 3.1.13.1 to 3.1.13.6.
3.1.13.1
off component of duty cycle
T
off
percentage of time the EUT is in the off mode
3.1.13.2
sleep component of duty cycle
T and T
sleep sleepWoL
percentage of time the EUT is in the sleep modes
3.1.13.3
on components of duty cycle
T
on
percentage of time the EUT is in the on mode
Note 1 to entry: The T duty cycle is equal to the sum of the T + T + T .
on work sidle idle
3.1.13.4
short idle component of duty cycle
T
sidle
percentage of time the EUT is in the short idle mode
3.1.13.5
long idle component of duty cycle
T
idle
percentage of time the EUT is in the long idle mode

– 10 – 62623 © IEC:2012
3.1.13.6
active component of duty cycle
T
work
percentage of time the EUT is in the active (work) mode
3.1.14
user of the test results
entity that will utilise the test results to apply to their needs
Note 1 to entry: Examples of such an entity are voluntary agreement owners, regulators, private companies, etc.
3.1.15
wake on LAN
WoL
functionality that allows a computer to wake from sleep or off when directed by a network
request via Ethernet
Note 1 to entry: This note applies to the French language only.
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
ACPI Advanced Configuration and Power Interface
NOTE 1 ACPI specification can be found here: http://www.acpi.info/.
CF Crest Factor
CFR Crest Factor Ratio
CPU Central Processing Unit
EPS External Power Supply
EUT Equipment Under Test
NOTE 2 Also referred to as product in this standard and sometimes referred to as UUT (Unit Under
Test) in other specifications.
FB_BW Frame Buffer Bandwidth
HDD Hard Disk Drive
IPS Internal Power Supply
LAN Local Area Network
MCF Meter Crest Factor
MCR Maximum Current Ratio
OS Operating System
PAPR Profile Active Power Ratio
PAWR Profile Active Workload Ratio
PCF Product Crest Factor
PF Power Factor
RAM Random Access Memory
RGB red green blue
RMS Root Mean Square
SSD Solid State Drive
TEC Typical Energy Consumption
THD Total Harmonic Distortion
62623 © IEC:2012 – 11 –
ULE Ultra Low Energy
UPS Uninterruptible Power Supply
WoL Wake on LAN
4 Specifications for EUT
4.1 Computer descriptions
4.1.1 Desktop computer
A desktop computer is a computer where the main unit is intended to be located in a
permanent location, often on a desk or on the floor. Desktops are not designed for portability
and utilize an external computer display, keyboard, and mouse. Desktops are designed for a
broad range of home and office applications.
4.1.2 Notebook computer
A notebook computer is a computer designed specifically for portability and intended to be
operated for extended periods of time either with or without a direct connection to a mains
power supply. Notebooks utilize an integrated computer display and are capable of operation
from an integrated battery. In addition, most notebooks use an EPS or a.c. brick and have an
integrated keyboard and pointing device. Notebook computers are typically designed to
provide similar functionality to desktops, including operation of software similar in functionality
as that used in desktops. For the purposes of this standard, docking stations are considered
accessories and therefore, should not be considered as part of the EUT. Tablet computers,
which may use touch-sensitive screens along with, or instead of, other input devices, are
considered notebook computers in this standard. Netbook computers which are typically
identified by a smaller screen size (constrained) and base memory size are also considered
notebook computers in this standard.
4.1.3 Integrated desktop computer
An integrated desktop computer is a desktop computer where the computer and computer
display function as a single unit receiving its a.c. power through a single mains cable.
Integrated desktop computers come in one of two possible forms:
– a product where the computer display and computer are physically combined into a single
unit; or
– a product packaged as a single product where the computer display is separate but is
connected to the main chassis by a d.c. power cord and both the computer and computer
display are powered from a single power supply.
As a subset of desktop computers, integrated desktop computers are typically designed to
provide similar functionality as desktop computers.
NOTE An integrated desktop computer can also be referred to as an all-in-one computer.
4.2 Power modes
4.2.1 Off mode
Off mode is the lowest power mode which cannot be switched off (influenced) by the user and
that may persist for an indefinite time when the EUT is connected to the main electricity
supply and used in accordance with the manufacturer’s instructions. For products where
ACPI standards are applicable, off mode correlates to ACPI system level S5 state.
NOTE Some international regulations also refer to this mode as standby mode.

– 12 – 62623 © IEC:2012
4.2.2 P
off
P represents the average power measured in the off mode.
off
4.2.3 Sleep mode
Sleep mode is the lowest power mode that the EUT is capable of entering automatically after
a period of inactivity or by manual selection. An EUT with sleep capability can quickly wake in
response to network connections or user interface devices with a latency of ≤ 5 s from
initiation of wake event to product becoming fully usable including rendering of display. For
products where ACPI standards are applicable, sleep mode most commonly correlates to
ACPI system level S3 (suspend to RAM) state. When the EUT is tested with the WoL
capability disabled in the sleep state, it is referred to as sleep mode. When the EUT is tested
with the WoL capability enabled in the sleep state, it is referred to as WoL sleep mode.
4.2.4 P
sleep
represents the average power measured in the sleep mode with the WoL capability
P
sleep
disabled.
4.2.5 P
sleepWoL
P represents the average power measured in the sleep mode with the WoL capability
sleepWoL
enabled.
4.2.6 On mode
The on mode represents the mode the EUT is in when not in the sleep or off modes. The on
mode has several sub-modes that include the long idle mode, the short idle mode and the
active (work) mode.
4.2.7 P
on
P represents the average power measured when in the on mode.
on
4.2.8 Idle modes
4.2.8.1 General
The idle modes are modes in which the operating system and other software have completed
loading, the product is not in sleep mode, and activity is limited to those basic applications
that the product starts by default. There are two forms of idle that comprise the idle modes:
short idle mode (see 4.2.8.2) and long idle mode (see 4.2.8.4).
4.2.8.2 Short idle mode
Short idle is the mode where the EUT has reached an idle condition (for example, 5 min after
OS boot or after completing an active workload or after resuming from sleep, one can also
use 15 min in order to conform to legacy testing procedures), the screen is on for at least
30 min to allow it to warm up, and set to at least a brightness level detailed in test procedure
5.3, and long idle power management features should not have engaged (for example, HDD
(if available) is spinning and the EUT is prevented from entering sleep mode).
4.2.8.3 P
sidle
P represents the average power measured when in the short idle mode.
sidle
62623 © IEC:2012 – 13 –
4.2.8.4 Long idle mode
Long idle mode is the mode where the EUT has reached an idle condition (for example,
15 min after OS boot or after completing an active workload or after resuming from sleep),
the screen of the primary display has just blanked but EUT remains in the working mode
(ACPI G0/S0). Power management features, if configured as shipped, should have engaged
(for example, primary display is on, HDD may have spun-down) but the EUT is prevented from
entering sleep mode.
NOTE The screen has just blanked” refers to the main computer display (integrated panel or external display)
having entered a low power state where the screen contents cannot be observed (for example, backlight has been
turned off turning the screen black).
4.2.8.5 P
idle
P represents the average power measured when in the long idle mode.
idle
4.2.9 Active (work) mode
Active mode is the mode in which the EUT is carrying out work in response to
– prior or concurrent user input; or
– prior or concurrent instruction over the network.
This mode includes active processing, seeking data from storage, memory, or cache, while
awaiting further user input and before entering other power modes. In this mode, the screen is
on and set to as-shipped brightness.
4.2.10 P
work
P represents the average power measured when in the active mode.
work
4.3 Profile attributes
4.3.1 Profile
A profile is a combination of duty cycle attributes and a given use case (for example, office
users, home users, gamers).
NOTE Refer to Annex A, Annex B and Annex C for further information on profiles.
4.3.2 Majority profile
The majority profile is the most common profile of users for desktop and notebook computers.
The majority profile should be used with this standard and is documented in Annex B. It
provides the duty cycle attributes and the profile TEC error that is used to determine the
TEC equation to be used in 5.6.
4.3.3 Minority profile
The minority profiles represent less common profiles of users of desktop and notebook
computers that are not represented in the majority profile. As an example, extreme gamers
represent a very specific profile but are a very small percentage of computer users.
4.3.4 Profile study
A profile study is a study performed to create a new profile for this standard. The study shall
generate, together with supporting data, the following:
– all the duty cycle attributes;

– 14 – 62623 © IEC:2012
– the PAPR (see 4.3.6);
– the profile TEC error (see 4.3.9);
– the PAWR (see 4.3.7).
All data shall be derived from a statistically significant sample size that is representative of
the user population as a whole. Annex C provides guidance on how to conduct a profile study.
4.3.5 Product active power ratio
The product active power ratio is the ratio of P /P , or the average on power divided by
on sidle
short idle power for an individual product within a profile study.
4.3.6 PAPR
PAPR is the average of all the product active power ratios recorded in a profile study.
4.3.7 PAWR
PAWR represents the average ratio of P /P conducted on profile study products and is
work sidle
used to validate that the active workload closely matches the profile study (through its
PAWR).
4.3.8 Product TEC error
The product TEC error is the percent error calculation used in a profile study to evaluate how
much error exists for an individual product when directly measuring TEC versus estimating
TEC by substituting the static “short idle” power measurement for the measured P power.
work
4.3.9 Profile TEC error
The profile TEC error is the average of the product TEC error in a profile study.
4.4 Categorisation attributes
4.4.1 General
Below are some examples of categorisation attributes; additional examples should be found in
the category registry (see 5.5).
4.4.2 Cores
The cores attribute is the number of physical CPU cores in the EUT.
4.4.3 Channels of memory
Channels of memory is expressed by the total number of channels the EUT is capable of
supporting (they do not have to be populated). Each channel has a separate data path.
4.4.4 System memory
System memory is the amount of memory measured in gigabytes.
4.4.5 System fan
A system fan is any fan used in the EUT, excluding fans integrated into the power supply.

62623 © IEC:2012 – 15 –
4.4.6 TEC adders
A TEC adder is a power allowance expressed in kilowatt hour per year that when added or
configured to the EUT will increase its TEC by some amount. Examples could be:
– graphics cards, memory, TV tuners, sound cards, hard disk drives, solid state disk drives,
etc.;
– for an integrated desktop computer, the screen shall be treated as an adder.
5 Test procedure and conditions, categorisation, TEC formula, meter
specifications and results reporting
5.1 General
The following procedure shall be used when measuring the power or energy consumption of
the EUT.
The user of this standard shall measure a sample of the EUT. The size of the sample shall be
appropriate to demonstrate compliance to the requirements set by the user of the test
results.
5.2 Test setup
The EUT and test conditions shall be set up as defined below.
a) The EUT shall be configured in accordance with the instructions provided with the product
(unless otherwise stated in this test procedure) including all hardware accessories and
software shipped by default. The EUT shall also be configured using the following
requirements for all tests:
1) Desktop and integrated desktop computers shipped without an input device shall be
configured with a manufacturer’s recommended input device (for example, mouse
and/or keyboard). No other external peripherals shall be connected.
2) Desktop computers shall be configured with an external computer display (the external
display energy consumption is not included as part of the TEC calculation).
3) Notebook computers need not include a separate keyboard or mouse when equipped
with an integrated pointing device or digitizer.
4) Notebook computers shall be connected to the mains power source using the EPS
shipped with the product. Battery pack(s) shall be removed for all tests. For an EUT
where operation without a battery pack is not a supported configuration, the test shall
be performed with fully charged battery pack(s) installed, making sure to report this
configuration in the test results.
5) The screen shall be configured with a “desktop background” (wallpaper) of a solid
colour defined by a bitmap set to the RGB values of 130, 130, and 130. The screen
brightness shall be set as-shipped or to a specified luminance level condition as
appropriate.
NOTE 1 The as-shipped screen brightness is defined as a level the manufacturer deems to be
appropriate for how an end user would want to use the product.
6) A notebook and integrated desktop computer shall include the power used by the
integrated display in reported results.
NOTE 2 Additional specified luminance level conditions may be measured (see 5.3.5) and disclosed in the
reported results.
7) The sleep timer of the EUT shall be disabled or set to 30 min to prevent the EUT from
entering the sleep state during the idle or active tests.
Figure 1 illustrates a typical test setup for a notebook and a desktop computer.

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IEC  2116/12
Figure 1 – Typical test setup
NOTE 3 Figure 1 shows wired and wireless connections. Only one is connected during test per 5.2c).
b) A true r.m.s. watt meter that meets the meter requirements in 5.7 is placed between the
mains power supply and the EUT power supply. No power strips or UPS units shall be
connected between the meter and the EUT. The meter shall remain in place until all
required power mode data is recorded. The mains power supply shall meet the
requirements in 5.4.
c) For sleep, long idle, short idle and the optional active measurements, the EUT energy
consumption shall be measured with network connectivity in one of the two states
described below.
1) For an EUT with Ethernet support, the EUT shall be connected to an active network
switch that supports the highest link speed supported by the EUT (the network switch
does not need to be connected to a live network). Only a single network connection
needs to be made in the case of an EUT with multiple network connections. It shall
also support the minimum requirements needed to support additional power
management functions that are supported by the EUT.
As an example, IEEE 802.3az-2010 specification supports power management of
Ethernet links that shall be supported by both the EUT and network switch.
To test this function, the switch shall also support this function. Power to alternative
network devices such as wireless radios shall be turned off for all tests. This applies to
wireless network adapters or device-to-device wireless protocols (for example,
Bluetooth).
NOTE 4 For examples of wireless network adapters, see IEEE 802.11.
2) For an EUT that does not support Ethernet, but supports some other sort of wired
network connectivity, that network shall be turned on and be in a connected state.
3) For an EUT with only wireless connectivity, a live wireless connection to a wireless
router or network access point, which supports the highest and lowest data speeds of
the client radio, shall be maintained for the duration of testing.
d) Record the EUT description as required in 5.10.
e) Measure the test conditions as defined in 5.4 and record as required in 5.10.
f) The ambient light conditions of the test room shall be measured using a meter that meets
the requirements in 5.9 and set to the appropriate levels called for in 5.4.

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5.3 Test procedure
5.3.1 General
The test proced
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