IEC 61988-4-1:2015

IEC 61988-4-1 ®
Edition 1.0 2015-03
INTERNATIONAL
STANDARD
colour
inside
Plasma display panels –
Part 4-1: Environmental testing methods – Climatic and mechanical
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IEC 61988-4-1 ®
Edition 1.0 2015-03
INTERNATIONAL
STANDARD
colour
inside
Plasma display panels –
Part 4-1: Environmental testing methods – Climatic and mechanical

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-2392-5

– 2 – IEC 61988-4-1:2015 © IEC 2015
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references. 7
3 Terms, definitions and letter symbols . 8
4 Environmental tests . 8
4.1 General . 8
4.2 Test items . 8
4.3 Structure of testing equipment . 8
5 Standard conditions . 8
5.1 Standard reference atmosphere . 8
5.2 Standard atmospheric conditions for reference measurements and tests . 9
5.3 Standard atmospheric conditions for measurements and tests . 9
5.4 Standard atmospheric conditions for assisted drying . 9
5.5 Recovery conditions . 9
5.6 Standard installation conditions . 10
5.7 Standard measuring conditions . 10
5.8 PDP module state . 10
5.9 Operating conditions . 10
6 Measurements . 10
6.1 General . 10
6.2 Measurement item . 10
6.3 Initial measurements . 10
6.4 Intermediate measurements . 10
6.5 Final measurements . 11
6.6 Information to be given in the relevant specification . 11
7 Report . 11
8 Temperature and humidity testing methods (operation and storage) . 11
8.1 High temperature (storage) . 11
8.1.1 Purpose . 11
8.1.2 Test conditions . 11
8.1.3 Testing equipment . 12
8.1.4 Testing procedures . 12
8.1.5 Recovery . 12
8.1.6 Measurements . 12
8.1.7 Information to be given in the relevant specification . 12
8.2 Low temperature (operation) . 13
8.2.1 Purpose . 13
8.2.2 Test conditions . 13
8.2.3 Testing equipment . 13
8.2.4 Testing procedures . 13
8.2.5 Recovery . 14
8.2.6 Measurements . 14
8.2.7 Information to be given in the relevant specification . 15
8.3 Low temperature (storage) . 15
8.3.1 Purpose . 15
8.3.2 Test conditions . 15

8.3.3 Testing equipment . 15
8.3.4 Testing procedures . 15
8.3.5 Recovery . 16
8.3.6 Measurements . 16
8.3.7 Information to be given in the relevant specification . 16
8.4 Damp heat at steady state (operation) . 16
8.4.1 Purpose . 16
8.4.2 Test conditions . 16
8.4.3 Testing equipment . 17
8.4.4 Testing procedures . 17
8.4.5 Recovery . 17
8.4.6 Measurements . 17
8.4.7 Information to be given in the relevant specification . 17
8.5 Damp heat at steady state (storage) . 17
8.5.1 Purpose . 17
8.5.2 Test conditions . 17
8.5.3 Testing equipment . 18
8.5.4 Testing procedures . 18
8.5.5 Recovery . 18
8.5.6 Measurements . 18
8.5.7 Information to be given in the relevant specification . 18
8.6 Damp heat, cyclic . 19
8.6.1 Purpose . 19
8.6.2 Test conditions . 19
8.6.3 Testing equipment . 19
8.6.4 Testing procedure . 19
8.6.5 Recovery . 19
8.6.6 Measurements . 19
8.6.7 Information to be given in the relevant specification . 19
8.7 Rapid change of temperature with prescribed time of transition . 20
8.7.1 Purpose . 20
8.7.2 Test conditions . 20
8.7.3 Testing equipment . 20
8.7.4 Testing procedures . 20
8.7.5 Recovery . 20
8.7.6 Measurements . 20
8.7.7 Information to be given in the relevant specification . 21
8.8 Change of temperature with specified rate of change . 21
8.8.1 Purpose . 21
8.8.2 Test condition . 21
8.8.3 Testing equipment . 21
8.8.4 Testing procedures . 21
8.8.5 Recovery . 21
8.8.6 Measurements . 21
8.8.7 Information to be given in the relevant specification . 22
9 Air pressure testing methods . 22
9.1 Low air pressure (operation) . 22
9.1.1 Purpose . 22
9.1.2 Test conditions . 22

– 4 – IEC 61988-4-1:2015 © IEC 2015
9.1.3 Testing equipment . 22
9.1.4 Testing procedures . 22
9.1.5 Recovery . 23
9.1.6 Measurements . 23
9.1.7 Information to be given in the relevant specification . 23
9.2 Low air pressure (storage) . 23
9.2.1 Purpose . 23
9.2.2 Test conditions . 23
9.2.3 Testing equipment . 24
9.2.4 Testing procedures . 24
9.2.5 Recovery . 24
9.2.6 Measurements . 24
9.2.7 Information to be given in the relevant specification . 24
10 Mechanical testing methods . 24
10.1 Vibration (sinusoidal) . 24
10.1.1 Purpose . 24
10.1.2 Equipment . 25
10.1.3 Test conditions . 25
10.2 Shock . 25
10.2.1 Purpose . 25
10.2.2 Equipment . 25
10.2.3 Test conditions . 26
10.3 Transportation drop . 27
10.4 Toppling . 27

Figure 1 – Testing procedure at low temperature (operation) . 14
Figure 2 – Configuration of PDP module directions . 25
Figure 3 – Example of PDP shock testing equipment . 26

Table 1 – Standard conditions for reference measurements and tests . 9
Table 2 – Peak value and duration . 26

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLASMA DISPLAY PANELS –
Part 4-1: Environmental testing methods –
Climatic and mechanical
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
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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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 61988-4-1 has been prepared by IEC technical committee 110:
Electronic display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/637/FDIS 110/653/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.

– 6 – IEC 61988-4-1:2015 © IEC 2015
A list of all the parts in the IEC 61988 series, under the general title Plasma display panels,
can be found on the IEC website.
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.
A bilingual version of this publication may be issued at a later date.
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.
PLASMA DISPLAY PANELS –
Part 4-1: Environmental testing methods –
Climatic and mechanical
1 Scope
This part of IEC 61988 defines the following test methods for evaluating the climatic and
mechanical endurance characteristics of plasma display modules (PDP modules):
a) temperature and humidity tests
b) air pressure tests
c) mechanical tests
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.
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing – Part 2: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2: Tests – Test B: Dry heat
IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-13:1983, Basic environmental testing procedures – Part 2-13: Tests – Test M:
Low air pressure
IEC 60068-2-14:2009, Environmental testing – Part 2-14: Tests – Test N: Change of
temperature
IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance:
Shock
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-78:2012, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,
steady state
IEC 61747-5:1998, Liquid crystal and solid-state display devices – Part 5: Environmental,
endurance and mechanical test methods
IEC 61988-1, Plasma display panels – Part 1: Terminology and letter symbols
IEC 61988-2-1, Plasma display panels – Part 2-1: Measuring methods – Optical and
optoelectrical
– 8 – IEC 61988-4-1:2015 © IEC 2015
IEC 61988-2-5, Plasma display panels – Part 2-5: Measuring methods – Acoustic noise
ISO 2248, Packaging – Complete, filled transport packages – Vertical impact test by dropping
ISO 4180, Packaging – Complete, filled transport packages – General rules for the
compilation of performance test schedules – Part 1: General principles
ISO 10531, Packaging – Complete, filled transport packages – Stability testing of unit loads
3 Terms, definitions and letter symbols
For the purposes of this document, the terms, definitions and letter symbols given in
IEC 60068-1 and IEC 61988-1, as well as the following apply.
3.1
P
op
air pressure at which the PDP module is operated during the tests
3.2
P
st
air pressure at which the PDP module is stored in a non-operating state during the tests
4 Environmental tests
4.1 General
In this document, tests mean storage or operation tests at high or low temperature, high
humidity, low pressure, or combinations thereof, and vibration tests or shock tests, while
measurements mean the characteristic evaluations, i.e. initial, intermediate and final
measurements.
4.2 Test items
This document describes the following test items:
a) temperature and humidity tests (operation);
b) temperature and humidity tests (storage);
c) air pressure tests;
d) mechanical tests.
4.3 Structure of testing equipment
The system diagrams and/or driving conditions of the testing equipment shall comply with the
structure specified in each item.
5 Standard conditions
5.1 Standard reference atmosphere
Temperature: 25 °C
Air pressure: 101,3 kPa
NOTE No requirement for relative humidity is given because correction by calculation is generally not possible.
If the parameters to be measured depend on temperature and/or pressure, and the law of
dependence is known, the values shall be measured in the conditions specified in 5.3 and, if

necessary, be corrected by calculation to the standard reference atmospheric conditions
above.
5.2 Standard atmospheric conditions for reference measurements and tests
If the parameters to be measured depend on temperature, pressure and humidity and the law
of dependence is unknown, the atmospheric conditions to be specified shall be selected from
the following values, as shown in Table 1.
Table 1 – Standard conditions for reference measurements and tests

a a
Temperature Relative humidity Air pressure
°C % RH kPa
45 to 75 86 to 106
20 ± 3
25 ± 3
30 ± 3
35 ± 3
a
Inclusive values.
5.3 Standard atmospheric conditions for measurements and tests
Unless otherwise specified, all tests and measurements shall be carried out under standard
atmospheric conditions:
temperature: 15 °C to 35 °C;
relative humidity: 25 % to 85 %, where appropriate;
air pressure: 86 kPa to 106 kPa.
The absolute humidity of the atmosphere shall not exceed 22 g/m .
5.4 Standard atmospheric conditions for assisted drying
Where assisted drying is required before commencing a series of measurements, the
conditions listed below shall be used on the PDP module for at least 2 h, unless otherwise
prescribed by the relevant specification:
temperature: (55 ± 3) °C;
relative humidity: not exceeding 20 %;
air pressure: 86 kPa to 106 kPa.
When the specified temperature for the dry heat test is lower than 55 °C, assisted drying shall
be carried out at that lower temperature.
5.5 Recovery conditions
The recovery shall be carried out in the conditions specified in IEC 60068-1:2013, 5.3:
temperature: 15 °C to 35 °C;
relative humidity: 25 % to 75 %;
air pressure: 86 kPa to 106 kPa.

– 10 – IEC 61988-4-1:2015 © IEC 2015
5.6 Standard installation conditions
Unless otherwise specified in the relevant specification, stand the PDP module keeping
adequate clearance to avoid airflow disturbance. The mounting structure of the PDP module
shall be specified in the relevant specification.
5.7 Standard measuring conditions
The standard measuring conditions described in IEC 61988-2-1 shall be applied.
5.8 PDP module state
For the non-operating test, the PDP module shall be either unpacked and turned off, or as
otherwise specified in the relevant specification.
For the operating test, the PDP module shall be either in the unpacked, turned off and ready-
for-use state, or as otherwise specified in the relevant specification. In the operating test, the
module shall be turned on in each test procedure.
5.9 Operating conditions
Full screen: The signal input sets at (15 ± 1) % of white level without gamma correction or an
equivalent input level when gamma correction is used.
In case a different signal input is used, it shall be noted in the report.
NOTE The 15 % signal input level is a typical value for video.
6 Measurements
6.1 General
Measurement items are defined in each testing method. An initial measurement is required
before each test, and a final measurement is required after the test. If necessary,
intermediate measurements can be carried out during the test. If necessary, recovery
conditioning defined in each test shall be applied before final and intermediate measurements.
6.2 Measurement item
The following items shall be evaluated on initial, intermediate and final measurements:
a) visual and optical performance (refer to IEC 61988-2-1);
b) electrical performance (refer to IEC 61988-2-1);
c) acoustic noise (refer to IEC 61988-2-5);
d) mechanical performance.
If additional measurements are carried out, they shall be noted in the report. Data about initial,
intermediate and final measurements shall be recorded in the report.
6.3 Initial measurements
Initial measurements shall be carried out as specified under the standard atmospheric
conditions for the reference measurements and tests.
6.4 Intermediate measurements
The relevant specification may require functional tests during the conditioning programme.
When intermediate measurements are required, the relevant specification shall define the

measuring items and the period(s) during the conditioning, and the results shall be noted in
the report.
6.5 Final measurements
Final measurements shall be carried out in the same way as specified for the initial
measurements.
6.6 Information to be given in the relevant specification
When any test is included in the relevant specification, at least, the following details shall be
given, if applicable:
a) initial measurements;
b) final measurements.
Measurement requirements, for example intermediate measurements, etc., are added in each
test. Other details, which shall be given in the relevant specification, are described in each
clause or subclause.
7 Report
The test conditions shall be noted in the report.
The measurement items, measuring conditions and the results shall be noted in the report.
8 Temperature and humidity testing methods (operation and storage)
8.1 High temperature (storage)
8.1.1 Purpose
The purpose of this test is to evaluate the performance of the PDP module after high
temperature storage.
8.1.2 Test conditions
Test Bb of IEC 60068-2-2 shall be applied with the following specific conditions.
NOTE Test Bb: Dry heat for non heat-dissipating specimen with gradual change of temperature.
a) Temperature
The temperature shall be selected from the values given below:
(80 ± 3) °C
(70 ± 3) °C
(60 ± 3) °C
The temperature selected shall be noted in the report.
b) Duration
The duration shall be selected from the values given below:
24 h, 48 h, 72 h, 96 h, 120 h, 240 h and 500 h.
The duration selected shall be noted in the report.
c) Humidity
The absolute humidity of the atmosphere should not exceed 20 g/m (corresponding
approximately to 50 % relative humidity at 35 °C).

– 12 – IEC 61988-4-1:2015 © IEC 2015
8.1.3 Testing equipment
The specifications of the testing chamber are as follows:
a) The chamber shall be capable of maintaining the specified temperature in the working
space within the tolerances given in IEC 60068-2-2:2007, Clause 4, taking into account
the effect of the PDP module under test on chamber conditions. Forced air circulation may
be used to maintain homogeneous conditions.
b) In order to limit radiation problems, the temperature of the walls of the chamber, after
temperature stability has been reached, shall not differ by more than 8 % of the specified
ambient temperature of the test, expressed in K. This requirement applies to all parts of
the chamber walls, and the PDP modules shall be unable to “see” any heating or cooling
elements which do not comply with this requirement.
c) The temperature tolerances given in IEC 60068-2-2:2007, 5.1, are intended to take
account of absolute errors in measurements and slow changes of temperature.
8.1.4 Testing procedures
The initial and final measurements shall be applied before and after the test respectively.
The following testing procedure shall be applied:
a) The chamber shall be at the temperature of the laboratory. The PDP module, while being
at the ambient temperature of the laboratory, shall be introduced into the chamber in
accordance with 5.6 or as otherwise defined.
b) The temperature in the chamber shall then be adjusted to the temperature appropriate to
the degree of severity and time shall be allowed for the chamber to reach temperature
stability. (Temperature stability is defined in IEC 60068-1:2013, 4.8.) The rate of change
of temperature in the chamber shall not exceed 3 °C/min, averaged over a period of not
more than 5 min. The test temperature shall be measured in accordance with
IEC 60068-1:2013, 4.6.
c) The PDP module shall then be exposed to the high temperature conditions for the duration
as specified in the relevant specification. The duration shall be measured from the
moment temperature stability has been reached.
d) At the end of this period, the PDP module shall remain in the chamber and the
temperature shall be gradually lowered to a value lying within the limits of standard
atmospheric conditions for testing. The rate of change of temperature in the chamber shall
not exceed 3 °C/min, averaged over a period of not more than 5 min. At the end of this
period, the PDP module shall be subject to the recovery procedure in the chamber or
otherwise as appropriate.
8.1.5 Recovery
The following recovery is added to the procedure:
a) The PDP module shall then remain under standard atmospheric conditions for recovery for
a period adequate for the attainment of temperature stability.
b) If required by the relevant specification, the PDP module shall be measured during the
recovery period.
8.1.6 Measurements
The initial and final measurements shall be applied, where the measuring items shall be
defined in the relevant specification (see Clause 6). If these are required by the relevant
specification, intermediate measurements shall be performed during the procedure c) and d)
in 8.1.4.
8.1.7 Information to be given in the relevant specification
In addition to 6.6, the information below shall be given, if applicable:

a) time duration;
b) room temperature and PDP module temperature;
c) if required, intermediate measurements, time and temperature.
8.2 Low temperature (operation)
8.2.1 Purpose
The purpose of this test is to evaluate the performance of the PDP module at low temperature
operating conditions.
8.2.2 Test conditions
Test Ad of IEC 60068-2-1 shall be applied with the following specific conditions.
NOTE Test Ad: Cold for heat-dissipating specimens with gradual change of temperature that are powered after
initial temperature stabilization.
a) Temperature
The temperature shall be selected from the values given below:
(–20 ± 3) °C
(–10 ± 3) °C
(–5 ± 3) °C
The temperature selected shall be noted in the report.
b) Time before PDP module power-on
After the specified temperature has been reached, the time before the PDP module power-
on shall be selected from the values given below:
2 h, 4 h, 8 h, 12 h and 24 h.
The selected time before the PDP module power-on shall be noted in the report.
c) Duration
The duration shall be 4 h as shown in Figure 1 or longer. In case it is longer it shall be
noted in the report.
8.2.3 Testing equipment
The specifications of the testing chamber are as follows:
a) The chamber shall be capable of maintaining the specified temperature in the working
space within the tolerances given in IEC 60068-2-1:2013, Clause 4, taking into account
the effect of the PDP module under test on chamber conditions. Forced air circulation may
be used to maintain homogeneous conditions.
b) In order to limit radiation problems, the temperature of the walls of the chamber, after
temperature stability has been reached, shall not differ by more than 8 % of the specified
ambient temperature of the test, expressed in K. This requirement applies to all parts of
the chamber walls and the PDP modules shall be unable to “see” any heating or cooling
elements which do not comply with this requirement.
c) The temperature tolerances given in IEC 60068-2-1:2013, 5.1, are intended to take
account of absolute errors in measurements and slow changes of temperature. For heat-
dissipating PDP modules, the temperature near the PDP module is influenced by the
effect of heat dissipation of the PDP module itself and can be different from the values
measured in the positions defined in IEC 60068-1.
8.2.4 Testing procedures
The initial and final measurements shall be applied before and after the test respectively.

– 14 – IEC 61988-4-1:2015 © IEC 2015
The following testing procedure shall be applied:
a) The PDP module shall be introduced into the chamber in the ready-for-use state.
b) Adjust the temperature in the chamber to the prescribed temperature and maintain at the
temperature for the prescribed duration. The temperature and time before the PDP module
power-on shall be selected from the values given in 8.2.2.
c) Operate the PDP module. See 5.9 for the operating conditions.
d) Measure the PDP module 5 min after the PDP module has been turned on (low
temperature, first measurement on Figure 1).
e) Keep the PDP modules operating for 4 h or longer.
f) Measure the PDP module (low temperature, second measurement on Figure 1).
g) Turn off the PDP module and adjust the chamber to the standard atmospheric conditions.
The PDP module shall not show condensation.
Figure 1 shows the testing procedure at the low temperature operation mentioned above.

Temperature  °C Final measurement
Standard atmospheric
condition: (25 ± 3) °C
Time before PDP
module power-on
5 min 4 h
Temperature: (0 ± 3) °C
(Example)
Time  h
st nd
Power on Low temperature 1 Low temperature 2
Introduce PDP module
PDP module measurement
into the chamber measurement
IEC
Figure 1 – Testing procedure at low temperature (operation)
8.2.5 Recovery
The following recovery shall be applied:
a) The droplets of water may be removed.
b) The PDP module shall then remain under standard atmospheric conditions for recovery for
a period until the dew condensation is removed, with a minimum of 5 h.
c) If required by the relevant specification, the PDP module shall be measured during the
recovery period.
8.2.6 Measurements
The initial and final measurements shall be applied, where the measuring items shall be
defined in the relevant specification (see Clause 6).

8.2.7 Information to be given in the relevant specification
In addition to 6.6, the information below shall be given, if applicable:
a) temperature and time before PDP module power-on;
st nd
b) low temperature 1 and 2 measurements.
8.3 Low temperature (storage)
8.3.1 Purpose
The purpose of this test is to evaluate the performance of the PDP module after low
temperature storage.
8.3.2 Test conditions
Test Ab of IEC 60068-2-1 shall be applied with the following specific conditions.
NOTE Test Ab: Cold for non heat-dissipating specimen with gradual change of temperature.
a) Temperature
The temperature shall be selected from the values given below:
(–40 ± 3) °C
(–30 ± 3) °C
(–20 ± 3) °C
(–10 ± 3) °C
(–5 ± 3) °C
(0 ± 3) °C
The temperature selected shall be noted in the report.
b) Duration
The duration shall be selected from the values given below:
24 h, 48 h, 72 h, 96 h, 120 h and 240 h.
The duration selected shall be noted in the report.
8.3.3 Testing equipment
The testing chamber is specified in 8.2.3.
8.3.4 Testing procedures
The initial and final measurements shall be applied before and after the test respectively.
The following testing procedure shall be applied:
a) The chamber shall be at the temperature of the laboratory. The PDP module, while being
at the ambient temperature of the laboratory, shall be introduced into the chamber in
accordance with 5.6, or as otherwise specified.
b) The temperature in the chamber shall then be adjusted to the temperature appropriate to
the degree of severity and time shall be allowed for the chamber to reach temperature
stability. (Temperature stability is defined in IEC 60068-1:2013, 4.8.) The rate of change
of the temperature in the chamber shall not exceed 3 °C/min, averaged over a period of
not more than 5 min. The test temperature shall be measured in accordance with
IEC 60068-1:2013, 4.6.
c) The PDP module shall then be exposed to the low temperature conditions for the duration
as specified in the relevant specification. The duration shall be measured from the
moment temperature stability has been reached.

– 16 – IEC 61988-4-1:2015 © IEC 2015
d) At the end of this period, the PDP module shall remain in the chamber and the
temperature shall be gradually raised to a value lying within the limits of standard
atmospheric conditions for testing. The rate of change of the temperature in the chamber
shall not exceed 3 °C/min, averaged over a period of not more than 5 min. At the end of
this period, the PDP module shall be subject to the recovery procedure in the chamber, or
otherwise as appropriate.
8.3.5 Recovery
The following recovery shall be applied:
a) The droplets of water may be removed.
b) The PDP module shall then remain under standard atmospheric conditions for recovery for
a period until the dew condensation is removed, with a minimum of 5 h.
c) If required by the relevant specification, the PDP module shall be measured during the
recovery period.
8.3.6 Measurements
The initial and final measurements shall be applied, where the measuring items shall be
defined in the relevant specification (see Clause 6). If these are required by the relevant
specification, intermediate measurements shall be performed during the procedure c) and d)
in 8.3.4.
8.3.7 Information to be given in the relevant specification
In addition to 6.6, the information below shall be given, if applicable:
a) time duration;
b) room temperature and PDP module temperature;
c) if required, intermediate measurements, time and temperature.
8.4 Damp heat at steady state (operation)
8.4.1 Purpose
The purpose of th
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