IEC TS 60695-6-30:2013

IEC/TS 60695-6-30 ®
Edition 2.0 2013-04
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 6-30: Smoke obscuration – Small-scale static method – Apparatus

Essais relatifs aux risques du feu –
Partie 6-30: Opacité des fumées – Méthode statique à petite échelle –
Appareillage
IEC/TS 60695-6-30:2013
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IEC/TS 60695-6-30 ®
Edition 2.0 2013-04
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Fire hazard testing –
Part 6-30: Smoke obscuration – Small-scale static method – Apparatus

Essais relatifs aux risques du feu –

Partie 6-30: Opacité des fumées – Méthode statique à petite échelle –

Appareillage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 29.020 ISBN 978-2-83220-695-9

– 2 – TS 60695-6-30 © IEC:2013
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Relevance of test data and special observations . 10
5 Principle . 10
6 Apparatus . 11
6.1 General . 11
6.2 Test chamber . 11
6.2.1 Volume and dimensions . 11
6.2.2 Pressure control . 11
6.2.3 Exhaust system . 11
6.2.4 Temperature measurement . 12
6.3 Furnace (radiant heat source) . 12
6.4 Test specimen holder and support . 12
6.5 Gas burner . 12
6.6 Photometric system . 12
6.6.1 General . 12
6.6.2 Light source . 13
6.6.3 Photodetector . 13
6.7 Radiometer. 13
6.8 Measuring and recording devices . 13
7 Calibration and verification . 13
7.1 Furnace calibration . 13
7.2 Verification of the optical device . 14
7.3 Verification of the chamber air-tightness . 14
8 Test report . 14
Annex A (normative) Details of the test equipment . 15
Annex B (normative) Construction details . 24
Annex C (normative) Apparatus adjustments and maintenance . 27
Annex D (informative) . 31
Annex E (informative) Example of test verification report . 33
Annex F (informative) Verification of the performance of the apparatus by the use of
reference materials . 36
Bibliography . 39

Figure A.1 – Test apparatus . 15
Figure A.2 – Furnace section . 16
Figure A.3 – Support for furnace and test specimen holder . 17
Figure A.4 – Details of test specimen holder and pilot burner . 18
Figure A.5 – Photometer details . 19
Figure A.6 – Radiometer details . 20
Figure A.7 – Copper disk calorimeter . 21

TS 60695-6-30 © IEC:2013 – 3 –
Figure A.8 – Arrangement to measure pressure in the chamber and to prevent
overpressure . 22
Figure C.1 – Example of radiometer calibration . 28
Figure D.1 – Example 1 of test apparatus . 31
Figure D.2 – Example 2 of test apparatus . 32

Table A.1 – Tabular conversion of percent transmittance, T, to specific optical density,
D when G = 132 . 23
s
Table C.1 – Correction factors to be applied to D values . 30
s
– 4 – TS 60695-6-30 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 6-30: Smoke obscuration –
Small-scale static method –
Apparatus
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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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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
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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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• The subject is still under technical development or where, for any other reason, there is
the future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 60695-6-30, which is a technical specification, has been prepared by IEC technical
committee 89: Fire hazard testing.

TS 60695-6-30 © IEC:2013 – 5 –
This second edition of IEC/TS 60695-6-30 cancels and replaces the first edition published in
1996. It constitutes a technical revision.
It has the status of a basic safety publication in accordance with IEC Guide 104 and
ISO/IEC Guide 51.
This technical specification is to be used in conjunction with IEC/TS 60695-6-31.
The main changes with respect to the previous edition are listed below:
– This publication is to be re-designated as a technical specification.
– The title has been modified to align with the IEC Directives.
– The FOREWORD has been revised and updated.
– An INTRODUCTION has been added.
– The Scope has been updated.
– The normative references has been updated.
– The terms and definitions has been updated.
– Clause 4: Relevance of test data and special observations has been revised.
– Detailed editorial updates have been added throughout the document.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
89/1056/DTS 89/1094/RVC
Full information on the voting for the approval of this technical specification 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.
A list of all parts of the IEC 60695 series, under the general title of Fire hazard testing, can be
found on the IEC website.
Part 6 consists of the following parts:
Part 6-1: Smoke obscuration – General guidance
Part 6-2: Smoke obscuration – Summary and relevance of test methods
Part 6-30: Smoke obscuration – Small scale static method – Apparatus
Part 6-31: Smoke obscuration – Small-scale static test – Materials
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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – TS 60695-6-30 © IEC:2013
INTRODUCTION
The risk of fire needs to be considered in any electrical circuit, and the objective of
component, circuit and equipment design, and the choice of materials, is to reduce the
likelihood of fire, even in the event of foreseeable abnormal use, malfunction or failure.
Electrotechnical products, primarily as victims of fire, may nevertheless contribute to the fire.
One of the contributing hazards is the release of smoke, which may cause a reduction of
visibility and/or orientation which could impede escape from the building, or could impede fire
fighting.
Consequently, a reduction in the amount and the rate of generation of smoke produced by
materials/products during a fire reduces damage to equipment, facilitates evacuation of
people and facilitates the intervention of emergency services.

TS 60695-6-30 © IEC:2013 – 7 –
FIRE HAZARD TESTING –
Part 6-30: Smoke obscuration –
Small-scale static method –
Apparatus
1 Scope
This part of IEC 60695 describes the apparatus, calibration procedures and basic
experimental procedures for the determination of the specific optical density of smoke
produced by materials exposed vertically to a radiant heat source with or without the
application of a pilot flame. The test specimens are of a defined size. The determination of the
optical density is carried out in a pressure-controlled chamber previously calibrated with
reference materials.
The test methods are only applicable to flat, solid, non-metallic test specimens, of materials
used in electrotechnical products.
This technical specification does not provide a classification system for the behaviour of
materials.
The test methods are not applicable for materials that melt and flow away from the direct
impingement of heat flux.
The test methods are not recommended for further development for electrotechnical products
nor are they recommended as the basis for regulation or other controls on smoke release due
to the limitations of the physical fire model and the test specimen geometry – see Clause 4.
This basic safety publication is intended for use by technical committees in the preparation of
standards in accordance with the principles laid down in IEC Guide 104 and
ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
basic safety publications in the preparation of its publications. The requirements, test
methods or test conditions of this basic safety publication will not apply unless specifically
referred to or included in the relevant publications.
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 60584-1:1995, Thermocouples – Part 1: Reference tables
IEC 60584-2:1982, Thermocouples – Part 2: Tolerances
Amendment 1 (1989)
ISO 5659-2:2012, Plastics – Smoke generation – Part 2: Determination of optical density by a
single-chamber test
ISO 19706:2011, Guidelines for assessing the fire threat to people

– 8 – TS 60695-6-30 © IEC:2013
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
3.1
fire effluent
totality of gases and aerosols, including suspended particles, created by combustion or
pyrolysis in a fire
[SOURCE: ISO 13943, definition 4.105]
3.2
fire hazard assessment
evaluation of the possible causes of fire, the possibility and nature of subsequent fire growth,
and the possible consequences of fire
3.3
fire-safety engineering
application of engineering methods based on scientific principles to the development or
assessment of designs in the built environment through the analysis of specific fire scenarios
or through the quantification of risk for a group of fire scenarios
[SOURCE: ISO 13943, definition 4.126]
3.4
fire scenario
qualitative description of the course of a fire with respect to time, identifying key events that
characterise the studied fire and differentiate it from other possible fires
Note 1 to entry: It typically defines the ignition and fire growth processes, the fully developed fire stage, the fire
decay stage, and the environment and systems that impact on the course of the fire.
[SOURCE: ISO 13943, definition 4.129]
3.5
heat flux
amount of thermal energy emitted, transmitted or received per unit area and per unit time
-2
Note 1 to entry: The typical units are watts per square metre (W × m ).
[SOURCE: ISO 13943, definition 4.173]
3.6
obscuration by smoke
reduction in the intensity of light due to its passage through smoke
Note 1 to entry: In practice, obscuration of smoke is usually measured as the transmittance, which is normally
expressed as a percentage.
Note 2 to entry: Obscuration of smoke causes a reduction in visibility.
[SOURCE: ISO 13943, definition 4.242]
3.7
opacity of smoke
ratio of incident light intensity to transmitted light intensity through smoke, under specified
conditions
Note 1 to entry: Opacity of smoke is the reciprocal of transmittance.

TS 60695-6-30 © IEC:2013 – 9 –
Note 2 to entry: The opacity of smoke is dimensionless.
[SOURCE: ISO 13943, definition 4.243]
3.8
optical density of smoke
measure of the attenuation of a light beam passing through smoke expressed as the logarithm
to the base 10 of the opacity of smoke
cf. specific optical density, D (3.13)
s
Note 1 to entry: The optical density of smoke is dimensionless.
[SOURCE: ISO 13943, definition 4.244]
3.9
physical fire model
laboratory process, including the apparatus, the environment and the fire test procedure
intended to represent a certain phase of a fire
[SOURCE: ISO 13943, definition 4.251]
3.10
real-scale fire test
fire test that simulates a given application, taking into account the real scale, the real way the
item is installed and used, and the environment
Note 1 to entry: Such a fire test normally assumes that the products are used in accordance with the conditions
laid down by the specifier and/or in accordance with normal practice.
[SOURCE: ISO 13943, definition 4.273]
3.11
small-scale fire test
fire test performed on a test specimen of small dimensions
Note 1 to entry: A fire test performed on a test specimen of which the maximum dimension is less than 1 m is
usually called a small-scale fire test.
[SOURCE: ISO 13943, definition 4.292]
3.12
smoke
visible part of fire effluent
[SOURCE: ISO 13943, definition 4.293]
3.13
specific optical density, Ds
optical density of smoke multiplied by a geometric factor, plus a filter factor
Note 1 to entry: The geometric factor is V /(A × L), where V is the volume of the test chamber, A is the area of the
exposed surface of the test specimen, and L is the light path length.
Note 2 to entry: The use of the term “specific” does not denote “per unit mass” but rather denotes a quantity
associated with a particular test apparatus and area of the exposed surface of the test specimen.
Note 3 to entry: The filter factor is a number that is calculated from the optical density of a moveable neutral
density filter (see Clause 7.2).
Note 4 to entry: The specific optical density of smoke is dimensionless.

– 10 – TS 60695-6-30 © IEC:2013
3.14
transmittance
〈smoke〉 ratio of transmitted light intensity through smoke to incident light intensity, under
specified conditions
Note 1 to entry: Transmittance through smoke is the reciprocal of opacity of smoke.
Note 2 to entry: The transmittance is dimensionless and is usually expressed as a percentage.
cf. obscuration of smoke (3.6).
[SOURCE: ISO 13943 definition 4.346]
4 Relevance of test data and special observations
This small-scale fire test apparatus has been in worldwide use since about 1970, primarily for
material evaluation purposes. In the early 1990s, ISO TC 61 developed a similar apparatus
that was designed, in part, to overcome a number of limitations of the IEC apparatus, and in
1994 the first edition of ISO 5659-2 was published. It is now recognised that ISO 5659-2
overcomes the following significant limitations:
a) The heat flux is relatively low; consequently the method is only able to replicate
conditions found in ISO 19706 fire stage 1b and, possibly, fire stage 2.
b) The test specimen is vertically mounted, which excludes liquids and some thermoplastics.
Test specimens which swell towards the furnace also give problems, as the incident heat
flux experienced by the front of the test specimen increases significantly, and the pilot
flames can be extinguished, rendering the test invalid.
c) The limitations of the low heat flux and test specimen geometry mean that it is difficult to
establish a link between data from the apparatus and real fire scenarios.
d) There are no means of monitoring the test specimen mass during the test
Further limitations include the following:
e) There is little or no correlation between data from this apparatus, and the behaviour of
products in fires or real-scale fire tests.
f) The air supply is limited and the test specimen ceases to burn if the oxygen concentration
falls below approximately 14 %.
g) The deposition of smoke on the walls is significant.
The test methods do however offer the useful option to evaluate smoke production from both
flaming and non-flaming combustion, albeit at a low heat flux.
The data generated are not suitable for use as input to fire hazard assessment or for fire
safety engineering.
Overall, these test methods are not recommended for further development for electrotechnical
products. Neither are they recommended as the basis for regulation or other controls on
smoke release for electrotechnical products, due to the limitations of the physical fire model
and the test specimen geometry.
5 Principle
A test specimen, mounted vertically, is exposed to a controlled thermal radiation in a
pressure-controlled chamber, with or without the application of a pilot flame.
A photometric system is used to measure the opacity of the smoke generated.

TS 60695-6-30 © IEC:2013 – 11 –
6 Apparatus
6.1 General
This apparatus is able to measure a maximum specific optical density of 528 with the
moveable filter in place, and 924 without this filter.
WARNING: Appropriate safety measures are to be taken as toxic and harmful fire
effluents may be produced by pyrolysis or combustion of test specimens.
A description of the test apparatus is given in Annex A (Figures A.1 to A.8).
The details of construction are given in Annex B.
The calibration procedure and suggestions for maintenance are given in Annex C.
Two examples of the test apparatus are given in Annex D.
6.2 Test chamber
6.2.1 Volume and dimensions
The test chamber has a nominal volume of 0,51 m³ and the following internal dimensions:
– width: 914 mm ± 3 mm
– depth: 610 mm ± 3 mm
– height: 914 mm ± 3 mm
The interior surfaces shall be suitable for periodic cleaning and resistant to corrosion.
NOTE Example of panel construction: interior surface made of enamelled steel, core panels made of thermally
insulating material, exterior surface made of galvanized steel.
6.2.2 Pressure control
When closed, the chamber shall be capable of maintaining positive pressure during test
periods, in accordance with 6.3. A water manometer is suitable for measuring the chamber
pressure.
A blow-out sheet of aluminium foil approximately 0,04 mm thick is used to cover an aperture
in the floor of the chamber, to provide protection against a sudden increase in pressure.
Before installing, carefully degrease, clean and wipe the floor of the chamber around the
aperture.
Care shall be taken not to wrinkle the foil so that no leakage develops at any creases.
A stainless steel grid can be placed over the aluminium foil to protect it. A stainless steel
receptacle can be placed under the test specimen holder to collect flow from a melting test
specimen which might damage the aluminium foil.
6.2.3 Exhaust system
An exhaust system complying with environmental safety regulations shall be connected to the
smoke outlet.
– 12 – TS 60695-6-30 © IEC:2013
6.2.4 Temperature measurement
A thermocouple shall be fixed to the centre of the inner surface of the wall opposite the door
to measure the inside temperature (see B.9).
IEC 60584-1 contains reference tables for thermocouples, and IEC 60584-2 gives tolerances.
6.3 Furnace (radiant heat source)
The furnace is a ceramic tube with an inside diameter of approximately 76,2 mm, containing
an electric heating element (see Figure A.2) and constructed and positioned as described in
B.2.
The furnace and its support are positioned so that the distance between the heating element
and the test specimen surface is 76,2 mm ± 1,0 mm.
The furnace operation shall be permanently monitored by means of an appropriate system.
The output from the furnace shall be controlled such that the radiance level is maintained
-2 -2
within the specified limits of 25 kW × m ± 0,5 kW × m averaged over a 38,1 mm diameter
circle at the centre of the test specimen position (see Annex C).
6.4 Test specimen holder and support
The test specimen holder (see Figure A.4 and Clause B.3) is placed on a support attached to
the furnace support so that the centre of the test specimen can be moved by an appropriate
device along the centreline of the furnace.
A blank test specimen holder, consisting of a refractory plate 76,2 mm × 76,2 mm shall be
located in front of the furnace opening, whenever the furnace is energised, except during
testing or calibration.
The refractory plate is held against the lips of the front of the test specimen holder by a spring
and retaining rod.
-3 -3
NOTE A plate with a nominal density of between 800 kg × m and 970 kg × m and a minimum thickness of
10 mm has been found to be satisfactory.
6.5 Gas burner
During flaming exposure tests, a burner (see B.5) with a row of six tubes is fixed so that the
tips of the horizontal tubes are centred 6,4 mm ± 1,5 mm above the lower opening of the test
specimen holder (N dimension in Figure A.4) and 6,4 mm ± 0,8 mm away from the test
specimen area (dimension M in Figure A.4).
The fuel used shall be a mixture of propane (purity 95 % or better) and air at flowrates of
3 -1 3 -1 3 -1 3 -1
× min ± 5 cm × min and 500 cm × min ± 25 cm × min respectively. The flow-
50 cm
rates are adjusted by needle valves and measured by two flow meters.
6.6 Photometric system
6.6.1 General
The photometric system consists of a light source and photodetector oriented vertically to
reduce measurement variations resulting from stratification of the smoke (see Figure A.5 and
Clause B.6).
The photometric system shall ensure the recording of optical densities over 6 sensitivity
ranges for the measurement of the transmittance factors comprised between 0,000 1 % and
100 %.
TS 60695-6-30 © IEC:2013 – 13 –
The photometer shall have an accuracy of better than ± 3 % of the maximum reading on any
sensitivity range. The output of the photodetector is connected to a recording device.
6.6.2 Light source
The light source is an incandescent tungsten filament lamp (nominally 6,5 V) mounted in a
light-tight box separated from the test chamber by a window located in the floor, heated to
about 50 °C in order to prevent condensation.
This box shall contain the necessary optics to provide a collimated light beam of 38,1 mm
diameter passing vertically through the chamber.
6.6.3 Photodetector
The photodetector is a photomultiplier tube with a dark current of less than 1 nA and an S-4
spectral sensitivity response in accordance with the ILC , located at the top of the chamber
opposite the light source in a light-tight box isolated from the test chamber by a window
located in the ceiling. A converging lens shall be used to focus the beam on the detector. A
removable neutral filter with a nominal optical density of 2, is used to extend the range of
measurements of the optical density.
6.7 Radiometer
A radiometer shall be available to measure the heat flux from the furnace (see B.7).
6.8 Measuring and recording devices
A data recorder shall be available to measure:
– the radiometer output voltage when calibrating the furnace (see Annex C);
– the photodetector output voltage during the tests (see 6.6).
7 Calibration and verification
7.1 Furnace calibration
Before any calibration or test, the temperature of the rear wall panel of the test chamber shall
be stabilised at 33 °C ± 4 °C, the apparatus cleaned of any residues from previous tests, and
flushed with air for at least 2 min.
The furnace shall be calibrated using the following procedure:
Remove the burner, mount the radiometer in the furnace in the stand-by position and connect
to the electrical and gas services. Place the blank test specimen holder in position in front of
the furnace. Move the radiometer in front of the furnace by displacing the blank test specimen
holder against the stop on the supporting framework, and check the accuracy of the
radiometer alignment relative to the furnace opening using the 38,1 mm gauge, and make any
necessary adjustments (see C.1.2).
NOTE This test is sensitive to small variations in the position of the radiometer and of test specimens relative to
the radiant heat source. The furnace gauge can also be used for checking the position of test specimen holders.
Return the radiometer and blank test specimen holder to their former positions, bring the
apparatus to its normal operating condition with the chamber wall temperature remaining
steady at 33 °C ± 4 °C, and move the radiometer to be in front of the furnace by displacing the
blank test specimen holder against the stop.
———————
ILC: International Lighting Commission

– 14 – TS 60695-6-30 © IEC:2013
With the chamber door closed, the inlet vent open and the exhaust vent closed, supply air to
the radiometer cooler to maintain the radiometer body temperature at 93 °C ± 3 °C. Monitor
the radiometer output to determine when equilibrium has been reached, and then adjust the
furnace, as necessary, to give a steady voltage reading corresponding to the calibrated value
-2 -2
equivalent to a steady-state irradiance of 25 kW × m ± 0,5 kW × m . Allow about 10 min
between adjustments to the furnace to ensure that the radiometer has reached equilibrium. If
the door is opened for any reason during calibration, wait sufficient time after closing the door
to allow thermal equilibrium to be reached before taking the final voltage reading.
At the end of the calibration procedure, return the blank test specimen holder to the position
in front of the furnace, turn off the radiometer cooling air supply and remove the radiometer
from the test chamber.
7.2 Verification of the optical device
The accuracy and linearity of the photometer (see C.1.4) shall be confirmed by placing
standard neutral density filters (described in C.1.4.2) in the light path. These filters shall cover
the whole aperture of the optical system and the specific optical density values measured by
the photometer shall be ± 5 % of the calibrated values.
NOTE In order to confirm the specified rated values of specific optical density given at 600 nm the light
transmittance of these filters can be checked by spectrometric analysis in the range 400 nm to 900 nm, because
the light source has a wide spectral distribution. Hence, the specific optical density measured with this filter may
not be accurate, but comparable from one laboratory to another, if the spectral distribution of the lamps is identical.
7.3 Verification of the chamber air-tightness
The chamber tightness shall be verified periodically by a leakage rate test using a U-shaped
manometer (see Figure A.8 and Clause B.10). The pressure inside the chamber shall be
raised to approximately 76 mm of water by introducing compressed air through a gas
sampling port on the top of the chamber.
The time for the pressure to fall to 50 mm of water, determined using a stopwatch, shall not
be less than 5 min.
8 Test report
For each series of tests: the test report shall include the following information:
– A description:
• of the test chamber
• of the sample
• of each test specimen, including the sampling method and thickness
• the number of test specimens and how they were conditioned and their average
thickness
• the test conditions: exposure method (flaming or non-flaming), test duration, calibration
and operating values (furnace supply voltage and chamber temperature).
– Observations during the test on the behaviour of each test specimen (with the details of
main events).
– For each test specimen the curve representing the value of the specific optical density (D )
s
as a function of test time (D = f(t)); the average values D , D and D (corr) (see F.5).
s m c m
TS 60695-6-30 © IEC:2013 – 15 –
Annex A
(normative)
Details of the test equipment
Figures A.1 to A.8 provide detailed descriptions of the test apparatus.

Figure A.1 – Test apparatus
– 16 – TS 60695-6-30 © IEC:2013

Figure A.2 – Furnace section
TS 60695-6-30 © IEC:2013 – 17 –

Figure A.3 – Support for furnace and test specimen holder

– 18 – TS 60695-6-30 © IEC:2013

Figure A.4 – Details of test specimen holder and pilot burner

TS 60695-6-30 © IEC:2013 – 19 –

Figure A.5 – Photometer details

– 20 – TS 60695-6-30 © IEC:2013

Figure A.6 – Radiometer details

TS 60695-6-30 © IEC:2013 – 21 –

Figure A.7 – Copper disk calorimeter

– 22 – TS 60695-6-30 © IEC:2013

Figure A.8 – Arrangement to measure pressure in the chamber
and to prevent overpressure
TS 60695-6-30 © IEC:2013 – 23 –
Table A.1 can be used for the evaluation of the specific optical density (D ).
s
Table A.1 – Tabular conversion of percent transmittance, T, to specific
optical density, D when G = 132
s
Parameters 0 1 2 3 4 5 6 7 8 9
and % T
Specific optical density(D )
transmision range
s
90 6 5 5 4 4 3 2 2 1 1
Multiplier: 100
80 13 12 11 11 10 9 9 8 7 7
with ND-2 filter
70 20 20 9 18 17 16 16 15 14 14

60 29 28 27 26 26 25 24 23 22 21

50 40 39 37 36 35 34 33 32 31 30
100 % to 10 % T
40 53 51 50 48 47 46 45 43 42 41
30 69 67 65 64 62 60 59 57 55 54
20 92 89 87 84 82 79 77 75 73 71
10 132 127 122 117 113 109 105 102 98 95
-1
138 137 137 136 136 135 134 134 133 133
90 × 10
Multiplier: 10
80 145 144 143 143 142 141 141 140 139 139
with ND-2 filter
70 152 152 151 150 149 148 148 147 146 146

60 161 160 159 158 158 157 156 155 154 153

50 172 171 169 168 167 166 165 164 163 162
10 % to 1 % T
40 185 183 182 180 179 178 177 175 174 173
30 201 199 197 196 194 192 191 189 187 186
20 224 221 219 216 214 211 209 207 205 203
10 264 259 254 249 245 241 237 234 230 227
-2
270 269 269 268 268 267 266 266 265 265
90 × 10
Multiplier: 1
80 277 276 275 275 274 273 273 272 271 271
with ND-2 filter
70 284 284 283 282 281 280 280 279 278 278

60 293 292 291 290 290 289 288 287 286 285

50 304 303 301 300 299 298 297 296 295 294
1 % to 0,1 % T
40 317 315 314 312 311 310 309 307 306 305
30 333 331 329 328 326 324 323 321 319 318
20 356 353 351 348 346 343 341 339 337 335
10 396 391 386 381 377 373 369 366 362 359
-3
402 401 401 400 400 399 398 398 397 397
90 × 10
Multiplier: 0,1
80 409 408 407 407 406 405 405 404 403 403
with ND-2 filter
70 416 416 415 414 413 412 412 411 410 410

60 425 424 423 422 422 421 420 419 418 417

50 436 435 433 432 431 430 429 428 427 426
0,1 % to 0,01 % T
40 449 447 446 444 443 442 441 439 438 437
30 465 463 461 460 458 456 455 453 451 450
20 488 485 483 480 478 475 473 471 469 467
10 528 523 518 513 509 505 501 498 494 491
-4
534 533 533 532 532 531 530 530 529 529
90 × 10
Multiplier: 1
80 541 540 539 539 538 537 537 536 535 535
without ND-2
70 548 548 547 546 545 544 544 543 542 542
filter
60 557 556 555 554 554 553 552 551 550 549

50 568 567 565 564 563 562 561 560 559 558
0,01 % to
40 581 579 578 576 575 574 573 571 570 569
0,001 % T
30 597 595 593 592 590 588 587 585 583 582
20 620 617 615 612 610 607 605 603 601 599
10 660 655 650 645 641 637 633 630 626 623
-5
666 665 665 664 664 663 662 662 661 661
90 × 10
Multiplier: 0,1
80 673 672 671 671 670 669 669 668 667 667
without ND-2
70 680 680 679 678 677 676 676 675 674 674
filter
60 689 688 687 686 686 685 684 683 682 681

50 700 699 697 696 695 694 693 692 691 690
0,001 % to
40 713 711 710 708 707 706 705 703 702 701
0,0001 % T
30 729 727 725 724 722 720 719 717 715 714
20 752 749 747 744 742 739 737 735 733 731
10 792 787 782 777 773 769 765 762 758 755
0(*) – 924 885 861 845 832 821 812 805 798
(*) For information
– 24 – TS 60695-6-30 © IEC:2013
Annex B
(normative)
Construction details
B.1 General
Other equipment may be used if it can be shown that the results are in agreement with those
from this apparatus.
B.2 Furnace
The furnace (see Figure A.2) consists of two main components: the ceramic tube
...