SIST ISO 3308:1995
(Main)Routine analytical cigarette-smoking machine -- Definitions and standard conditions
Routine analytical cigarette-smoking machine -- Definitions and standard conditions
Machine à fumer analytique de routine pour cigarettes -- Définitions et conditions normalisées
Rutinski analizni cigaretni dimni stroj - Definicije in standardni pogoji
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INTERNATIONAL
3308
STANDARD
Third edi tion
1991-10-15
Routine analytical cigarette-Smoking machine -
Definitions and Standard conditions
Machine 2 fumer analytique de routine pour cigarettes - LXfinitions et
conditions normalis&es
.
Reference number
ISO 3308:1991(E)
---------------------- Page: 1 ----------------------
ISO 3308:1991(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 3308 was prepared by Technical Committee
ISO/TC 126, Tobacco and tobacco products.
This third edition cancels and replaces the second edition
(ISO 3308:1986), which has been technically revised as a result of an
extensive examination of the Smoking machine Performance by mem-
bers of CORESTA.
Major changes have also been made: subclause 4.8 now specifies the
use of a perforated disc (washer) in Order that all types of cigarettes
may be smoked; subclause 4.10 (specification of the ashtray Position);
and the inclusion of a new annex A which sets out the conditions for the
control of the ambient air flow around cigarettes in Smoking machines.
As a result of the changes, members of CORESTA have found increased
accuracy and precision and have been able to provide data for incor-
poration in ISO 4387:1991, Cigarettes - Determination of total and
nicotine-free dry particulate matter using a routine analytical Smoking
machine.
Annex A forms an inte gral part of this International Standard. Annexes
B and C are for inform ation only.
0 ISO 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii
---------------------- Page: 2 ----------------------
ISO 3308:1991(E)
Introduction
This International Standard describes the requirements found necessary
to be specified in the light of knowledge and experience gained with
analytical cigarette-Smoking machines.
. . .
Ill
---------------------- Page: 3 ----------------------
This page intentionally left blank
---------------------- Page: 4 ----------------------
ISO 3308:1991 (E)
INTERNATIONAL STANDARD
Routine analytical cigarette-Smoking machine - Definitions
and Standard conditions
ISO 6565:1983, Tobacco and tobacco products -
1 Scope
Draw resistance of cigarettes and #Wer rods - Defi-
nitions, Standard conditions and general aspecfs.
This International Standard
ISO 7210:1983, Smoking machines for tobacco and
- defines the Smoking Parameters and specifies
tobacco products - Non-routine test methods.
the Standard conditions to be provided for the
routine analytical machine Smoking of cigarettes;
3 Definitions
-
specifies the requirements of a routine analytical
Smoking machine complying with the Standard
For the purposes of this International Standard, the
conditions.
following definitions apply.
NOTE 1 Annex A specifies the ambient air vel-
3.1 ambient conditions: The whole of the variable
ocities surrounding cigarettes in a routine analytical
Parameters physically characterizing the conditions
Smoking machine; mechanical design of the enclos-
in the room and environment in which the analytical
ures immediately surrounding them; and the methods
Smoking is carried out.
of air velocity measurement, including the location
where air velocity shall be measured.
3.2 butt length: The length of unburnt cigarette re-
Annex B describes, by way of example, the special
maining at the moment when the Smoking is
characteristics of a typical Smoking machine incor-
stopped.
porating a Piston type of puffing mechanism.
Annex C includes a diagram of a puff Profile and il-
3.3 restricted Smoking: The condition that exists
lustrates definitions and Standard conditions.
when the butt end of a cigarette is closed to the at-
mosphere between successive Puffs.
3.4 free Smoking: The condition that exists when
2 Normative references
the butt end of a cigarette is completely exposed to
the atmosphere between successive Puffs.
The following Standards contain provisions which,
through reference in this text, constitute provisions
3.5 pressure drop: The differente in static pressure
of this International Standard. At the time of publi-
between any two Points of the pneumatic circuit of
cation, the editions indicated were valid. All stan-
a Smoking machine which are passed by a current
dards are subject to revision, and Parties to
of air at a constant flow rate of 17,5 ml/s.
agreements based on this International Standard
are encouraged to investigate the possibility of ap-
NOTE 2 The term draw resistance has a very similar
plying the most recent editions of the Standards in-
meaning. To avoid any confusion, the term draw resist-
dicated below. Members of IEC and ISO maintain
ante is used for cigarettes and filter rods, whereas the
term pressure drop is used by analogy in the case of the
registers of currently valid International Standards.
pneumatic circulation in a Smoking machine.
ISO 3402:1991, Tobacco and tobacco products - At-
3.6 puff duration: The interval of time during which
mosphere for conditioning and testing.
the port is connected with the suction mechanism.
ISO 4387:1991, Cigarettes - Determination of total
3.7 puff volume: The volume leaving the butt end
and nicotine-free dry particulate matter using a rou-
of a cigarette and passing through the smoke trap.
tine analytical Smoking machijle.
1
---------------------- Page: 5 ----------------------
ISO 3308:1991(E)
3.8 puff number: The number of Puffs necessary to
4 Standard conditions
smoke a cigarette to a specified butt length.
4.1 Machine pressure drop (3.5)
3.9 puff ftequency: The number of Puffs in a given
time.
The whole of the flow path between the butt end of
the cigarette and the suction mechanism shall offer
3.10 puff termination: The ending of the connection
the least possible resistance and its pressure drop
of the port with the suction mechanism.
shall not exceed 300 Pa.
3.11 puff Profile: The flow rate measured directly
4.2 Puff duration (3.6)
behind the butt end of a cigarette and depicted
graphically as a function of time.
The Standard puff duration shall be 20 s, with a
Standard deviation of not greater than 0,05 s for in-
dividual Puffs.
3.12 dead volume: The volume which exists be-
tween the butt end of a cigarette and the suction
mechanism.
4.3 Puff volume (3.7)
The Standard puff volume measured in series with
3.13 cigarette holder: The device for holding the
a pressure drop device of 1 kPa shall be 35 ml with
mouth end of a cigarette during Smoking.
a Standard deviation for individual Puffs not greater
than 0,15 ml. In one puff duration (3.6) not less than
3.14 smoke trap: The device for collecting such part
95 y0 of the puff volume shall leave the butt end of
of the smoke from a Sample of cigarettes as is
the cigarette.
necessary for the determination of specitied smoke
components.
4.4 Puff frequency (3.9)
3.15 port: The aperture of the suction mechanism
The Standard puff frequency shall be one puff every
through which a puff is drawn and to which is at-
60 s with a Standard deviation for this time not
tached a smoke trap.
greater than 0,5 s.
3.16 channel: An element of a Smoking machine
4.5 Puff Profile (3.11)
consisting of one or more cigarette holders, one trap
and a means of drawing a puff through the trap.
The puff Profile, when measured on an unlit ciga-
rette, shall be hell-shaped with a maximum between
3.17 compensation: The ability to maintain constant
0,8 s and 1,2 s from the Start of the puff. The in-
puff volumes and puff profiles when the pressure
creasing and decreasing Parts of the Profile shall not
drop at the port changes.
have more than one Point of inflection each. The
maximum flow rate shall be between 25 mI/s and
3.18 cigarette Position: The Position of a cigarette
30 ml/s (see annex B). At no Point shall the direc-
on the Smoking machine. In particular it is deter-
tion of flow be reversed.
mined by the angle made by the longitudinal axis of
the cigarette and the horizontal plane when a ciga-
NOTE 3 Principles of suction mechanisms using a Piston
rette is inserted into a cigarette holder in an ana- pump to obtain the puff Profile are given in annex B.
lytical Smoking machine.
4.6 Restricted Smoking (3.3)
3.19 mainstream smoke: All smoke which leaves
the butt end of a cigarette during the Smoking pro- An analytical Smoking machine shall be a restricted
cess. sm oker.
3.20 sidestream smoke: All smoke which leaves a 4.7 Puff number (3.8)
cigarette during the Smoking process other than
from the butt end.
Esch individual puff shall be counted and recorded
and the puff number rounded off to the nearest one-
tenth of a puff based on the puff duration.
3.21 ashtray: The device positioned under the
cigarettes in their holders to collect ash falling from
the cigarettes during Smoking.
4.8 Cigarette holders (3.13)
3.22 Clearing puff: Any puff taken after the cigarette The Standard cigarette holder shall cover
has been extinguished or removed from the ciga- 9 mm + 0,5 mm from the butt end of a cigarette and
rette holder. shall b< impermeable to smoke components and to
2
---------------------- Page: 6 ----------------------
ISO 3308:1991 (E)
closest to the butt end (back Seal) shall be reversed.
air. The Standard cigarette holder shall ensure that
The dimensions of the washer and labyrinth Seals
the Ieakage between the cigarette and cigarette
are given in figure 1. The washer shall be supported
holder is not greater than 0,5 7; of the puff volume.
by a structure with a hole in its centre of 4 mm di-
Either the cigarette holder or the smoke trap shall
ameter-. The assembly shall be constructed so that
be equipped with a perforated disc (washer) of plain
the cigarette shall be in contact with the washer
expanded synthetic rubber, closed cell sponge
when the cigarette is inserted to a depth of 9 mm
grade, which partly obstructs the butt end of the
from the sealinq annulus of the front labyrinth Seal.
5
cigarette. The synthetic rubber shall have a density
of 150 kg/m3 to 170 kg/m3, low swell oil resistance NOTE 4 An example of a suitable assembly is given in
figure 2.
and compression-deflection range of 35 kPa to
63 kPa. Four labyrinth Seals shall be used; the one
---------------------- Page: 7 ----------------------
ISO 3308:1991 (E)
Dimensions in millimetres
I
al Labyrlnth seal
b) Washer
Cigarette
R
n
I
ter
1,45
4,5 to 5,49 23
5,5 to 6,49 3
197
6,5 to 7,49 1,95
33
7,5 to 9 4
292
I details)
- Labyrinth seal and perforated disc (washer) (dimensiona
Figure 1 - Cigarette holder
4
---------------------- Page: 8 ----------------------
ISO 3308:1991 (E)
Labyrinth seals-
,Washer suppor
Labyrinth cap
smoke trom than one
NOTE - Washer support is fot- use where a central glass fibre smoke trap is used to trap
cigarette.
Figure 2 - Cigarette holder (schematic)
4.9 Cigarette Position (3.18)
5 Specification for th e routine ytical
Smoking machine
The angle formed by the longitudinal axis of the
cigarette and the horizontal plane shall be as small
The Smoking machine shall comply with the stan-
as possible; it shall not exceed IO0 if the centre of
dard conditions (see 4.1 and 4.10) and the following
the butt end is lower than the centre of the other
special conditions.
end, and 5” if the centre of the butt end is higher
than the centre of the other end.
The cigarette holders shall be arranged so that no
cigarette influences the burning of any other ciga-
rette.
5.1 Operating principle and puff Profile
4.10 Ashtray Position (3.21)
The machine shall include a device to draw a fixed
The ashtray shall be placed in a horizontal plane volume of air (puff) through a cigarette.
between 20 mm and 60 mm below the plane of the
NOTE 5 A schematic diagram is shown in figure3.
axes of the cigarettes.
---------------------- Page: 9 ----------------------
ISO 3308:1991 (E)
Dimensions in millmetres
L
1
-_----
I
r
Piston
Gas Phase
top dead centre Puff termination
out
Smoke trap device
, Butt length
Q
Piston pump
1
-9
I
I
I I
i
-w-w-----------
I
r 1
I
------
- ’
I
I L v--------D-----
J
I - Cigarette holder
I
sI1-:-, - Q
Port
I
-9
I
Swept v0lume-J LPuff volume
Channel
I
r --l
Figure 3 -
Smoking mackine schematics
5.1.1 The machine shall produce a hell-shaped puff puff volume of 35 ml without a pressure drop device,
Profile (see 4.5). a reduction of no more than 1,5 ml shall be observed
when the machine is tested with a pressure drop
device of 3 kPa.
51.2 The machine shall be a restricted smoker
(3.3).
5.2.3 The connecting piping between the smoke
trap and the suction Source shall offer the least
5.2 Reliability and compensatlon
possible resistance to flow. The pressure drop of the
total flow path between the butt end of the cigarette
The machine shall contain devices to control the puff
and the suction Source shall not exceed 300 Pa be-
volume, the puff duration, and the puff frequency.
fore Smoking (sec/ 4.1).
52.1 The machine shall possess the mechanical
5.2.4 The total dead volume (3.12) shall be as small
and electrical reliability necessary to meet the
as possible and shall not exceed 100 ml.
Standard conditions regarding thesc Parameters
(see 4.2 to 4.4) for prolonged periods.
5.3 Cigarette holders and smoke traps
52.2 The machine shall be capable of sufficient
compensation (3.17).
The machine shall contain devices for holding the
When the machine has initially been set to give a cigarette and for trapping the smoke produced.
6
---------------------- Page: 10 ----------------------
ISO 3308:1991 (E)
drop of the filter assembly shall not exceed
53.1 The cigarette holders shall be capable of
900 Pa at this air velocity. The content of
holding the butt end of the cigarette during Smoking.
polyacrylate binder shall not exceed 5 % (m/m).
The Standard conditions relative to the length of butt
covered by this device and the airtightness of the
The filter assembly shall be capable of quantitatively
seal shall be as given in 4.8.
retaining all of the particulate matter in the main-
stream smoke produced by the cigarette without
Labyrinth Seals shall be used for attaching ciga-
loss. In addition, the filter assembly shall be Chosen
rettes.
so that the increase in pressure drop of the as-
sembly does not exceed 250 Pa when measured af-
5.3,2 Devices shall be provided for attaching ciga-
ter the Smoking run.
rette holders to the machine so that the cigarette
holders are held rigidly.
5.3.7 Esch channel shall have a puff termination
NOTE 6 A screwed fitting or “0” ring seal is rec-
device linked to a butt length (mark) Sensor and puff
ommended. Rubber tubing is considered to be unsatis-
counter. When activated by the Sensor, the device
factory.
shall prevent any further drawing of air through the
cigarette.
5.3.3 The cigarettes to be smoked shall be at-
The Sensor may be either
tached to the ports or the smoke traps by Standard
cigarette holders (see 4.8).
a) a micro-switch activated by the burning through
of a 100 o/. cotton, 40 denier thread, placed on the
butt mark; ot
53.4 The machine shall be d
...
SLOVENSKI STANDARD
SIST ISO 3308:1995
01-maj-1995
Rutinski analizni cigaretni dimni stroj - Definicije in standardni pogoji
Routine analytical cigarette-smoking machine -- Definitions and standard conditions
Machine à fumer analytique de routine pour cigarettes -- Définitions et conditions
normalisées
Ta slovenski standard je istoveten z: ISO 3308:1991
ICS:
65.160 7REDNWREDþQLL]GHONLLQ Tobacco, tobacco products
RSUHPD and related equipment
SIST ISO 3308:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 3308:1995
---------------------- Page: 2 ----------------------
SIST ISO 3308:1995
INTERNATIONAL
3308
STANDARD
Third edi tion
1991-10-15
Routine analytical cigarette-Smoking machine -
Definitions and Standard conditions
Machine 2 fumer analytique de routine pour cigarettes - LXfinitions et
conditions normalis&es
.
Reference number
ISO 3308:1991(E)
---------------------- Page: 3 ----------------------
SIST ISO 3308:1995
ISO 3308:1991(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 3308 was prepared by Technical Committee
ISO/TC 126, Tobacco and tobacco products.
This third edition cancels and replaces the second edition
(ISO 3308:1986), which has been technically revised as a result of an
extensive examination of the Smoking machine Performance by mem-
bers of CORESTA.
Major changes have also been made: subclause 4.8 now specifies the
use of a perforated disc (washer) in Order that all types of cigarettes
may be smoked; subclause 4.10 (specification of the ashtray Position);
and the inclusion of a new annex A which sets out the conditions for the
control of the ambient air flow around cigarettes in Smoking machines.
As a result of the changes, members of CORESTA have found increased
accuracy and precision and have been able to provide data for incor-
poration in ISO 4387:1991, Cigarettes - Determination of total and
nicotine-free dry particulate matter using a routine analytical Smoking
machine.
Annex A forms an inte gral part of this International Standard. Annexes
B and C are for inform ation only.
0 ISO 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii
---------------------- Page: 4 ----------------------
SIST ISO 3308:1995
ISO 3308:1991(E)
Introduction
This International Standard describes the requirements found necessary
to be specified in the light of knowledge and experience gained with
analytical cigarette-Smoking machines.
. . .
Ill
---------------------- Page: 5 ----------------------
SIST ISO 3308:1995
This page intentionally left blank
---------------------- Page: 6 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
INTERNATIONAL STANDARD
Routine analytical cigarette-Smoking machine - Definitions
and Standard conditions
ISO 6565:1983, Tobacco and tobacco products -
1 Scope
Draw resistance of cigarettes and #Wer rods - Defi-
nitions, Standard conditions and general aspecfs.
This International Standard
ISO 7210:1983, Smoking machines for tobacco and
- defines the Smoking Parameters and specifies
tobacco products - Non-routine test methods.
the Standard conditions to be provided for the
routine analytical machine Smoking of cigarettes;
3 Definitions
-
specifies the requirements of a routine analytical
Smoking machine complying with the Standard
For the purposes of this International Standard, the
conditions.
following definitions apply.
NOTE 1 Annex A specifies the ambient air vel-
3.1 ambient conditions: The whole of the variable
ocities surrounding cigarettes in a routine analytical
Parameters physically characterizing the conditions
Smoking machine; mechanical design of the enclos-
in the room and environment in which the analytical
ures immediately surrounding them; and the methods
Smoking is carried out.
of air velocity measurement, including the location
where air velocity shall be measured.
3.2 butt length: The length of unburnt cigarette re-
Annex B describes, by way of example, the special
maining at the moment when the Smoking is
characteristics of a typical Smoking machine incor-
stopped.
porating a Piston type of puffing mechanism.
Annex C includes a diagram of a puff Profile and il-
3.3 restricted Smoking: The condition that exists
lustrates definitions and Standard conditions.
when the butt end of a cigarette is closed to the at-
mosphere between successive Puffs.
3.4 free Smoking: The condition that exists when
2 Normative references
the butt end of a cigarette is completely exposed to
the atmosphere between successive Puffs.
The following Standards contain provisions which,
through reference in this text, constitute provisions
3.5 pressure drop: The differente in static pressure
of this International Standard. At the time of publi-
between any two Points of the pneumatic circuit of
cation, the editions indicated were valid. All stan-
a Smoking machine which are passed by a current
dards are subject to revision, and Parties to
of air at a constant flow rate of 17,5 ml/s.
agreements based on this International Standard
are encouraged to investigate the possibility of ap-
NOTE 2 The term draw resistance has a very similar
plying the most recent editions of the Standards in-
meaning. To avoid any confusion, the term draw resist-
dicated below. Members of IEC and ISO maintain
ante is used for cigarettes and filter rods, whereas the
term pressure drop is used by analogy in the case of the
registers of currently valid International Standards.
pneumatic circulation in a Smoking machine.
ISO 3402:1991, Tobacco and tobacco products - At-
3.6 puff duration: The interval of time during which
mosphere for conditioning and testing.
the port is connected with the suction mechanism.
ISO 4387:1991, Cigarettes - Determination of total
3.7 puff volume: The volume leaving the butt end
and nicotine-free dry particulate matter using a rou-
of a cigarette and passing through the smoke trap.
tine analytical Smoking machijle.
1
---------------------- Page: 7 ----------------------
SIST ISO 3308:1995
ISO 3308:1991(E)
3.8 puff number: The number of Puffs necessary to
4 Standard conditions
smoke a cigarette to a specified butt length.
4.1 Machine pressure drop (3.5)
3.9 puff ftequency: The number of Puffs in a given
time.
The whole of the flow path between the butt end of
the cigarette and the suction mechanism shall offer
3.10 puff termination: The ending of the connection
the least possible resistance and its pressure drop
of the port with the suction mechanism.
shall not exceed 300 Pa.
3.11 puff Profile: The flow rate measured directly
4.2 Puff duration (3.6)
behind the butt end of a cigarette and depicted
graphically as a function of time.
The Standard puff duration shall be 20 s, with a
Standard deviation of not greater than 0,05 s for in-
dividual Puffs.
3.12 dead volume: The volume which exists be-
tween the butt end of a cigarette and the suction
mechanism.
4.3 Puff volume (3.7)
The Standard puff volume measured in series with
3.13 cigarette holder: The device for holding the
a pressure drop device of 1 kPa shall be 35 ml with
mouth end of a cigarette during Smoking.
a Standard deviation for individual Puffs not greater
than 0,15 ml. In one puff duration (3.6) not less than
3.14 smoke trap: The device for collecting such part
95 y0 of the puff volume shall leave the butt end of
of the smoke from a Sample of cigarettes as is
the cigarette.
necessary for the determination of specitied smoke
components.
4.4 Puff frequency (3.9)
3.15 port: The aperture of the suction mechanism
The Standard puff frequency shall be one puff every
through which a puff is drawn and to which is at-
60 s with a Standard deviation for this time not
tached a smoke trap.
greater than 0,5 s.
3.16 channel: An element of a Smoking machine
4.5 Puff Profile (3.11)
consisting of one or more cigarette holders, one trap
and a means of drawing a puff through the trap.
The puff Profile, when measured on an unlit ciga-
rette, shall be hell-shaped with a maximum between
3.17 compensation: The ability to maintain constant
0,8 s and 1,2 s from the Start of the puff. The in-
puff volumes and puff profiles when the pressure
creasing and decreasing Parts of the Profile shall not
drop at the port changes.
have more than one Point of inflection each. The
maximum flow rate shall be between 25 mI/s and
3.18 cigarette Position: The Position of a cigarette
30 ml/s (see annex B). At no Point shall the direc-
on the Smoking machine. In particular it is deter-
tion of flow be reversed.
mined by the angle made by the longitudinal axis of
the cigarette and the horizontal plane when a ciga-
NOTE 3 Principles of suction mechanisms using a Piston
rette is inserted into a cigarette holder in an ana- pump to obtain the puff Profile are given in annex B.
lytical Smoking machine.
4.6 Restricted Smoking (3.3)
3.19 mainstream smoke: All smoke which leaves
the butt end of a cigarette during the Smoking pro- An analytical Smoking machine shall be a restricted
cess. sm oker.
3.20 sidestream smoke: All smoke which leaves a 4.7 Puff number (3.8)
cigarette during the Smoking process other than
from the butt end.
Esch individual puff shall be counted and recorded
and the puff number rounded off to the nearest one-
tenth of a puff based on the puff duration.
3.21 ashtray: The device positioned under the
cigarettes in their holders to collect ash falling from
the cigarettes during Smoking.
4.8 Cigarette holders (3.13)
3.22 Clearing puff: Any puff taken after the cigarette The Standard cigarette holder shall cover
has been extinguished or removed from the ciga- 9 mm + 0,5 mm from the butt end of a cigarette and
rette holder. shall b< impermeable to smoke components and to
2
---------------------- Page: 8 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
closest to the butt end (back Seal) shall be reversed.
air. The Standard cigarette holder shall ensure that
The dimensions of the washer and labyrinth Seals
the Ieakage between the cigarette and cigarette
are given in figure 1. The washer shall be supported
holder is not greater than 0,5 7; of the puff volume.
by a structure with a hole in its centre of 4 mm di-
Either the cigarette holder or the smoke trap shall
ameter-. The assembly shall be constructed so that
be equipped with a perforated disc (washer) of plain
the cigarette shall be in contact with the washer
expanded synthetic rubber, closed cell sponge
when the cigarette is inserted to a depth of 9 mm
grade, which partly obstructs the butt end of the
from the sealinq annulus of the front labyrinth Seal.
5
cigarette. The synthetic rubber shall have a density
of 150 kg/m3 to 170 kg/m3, low swell oil resistance NOTE 4 An example of a suitable assembly is given in
figure 2.
and compression-deflection range of 35 kPa to
63 kPa. Four labyrinth Seals shall be used; the one
---------------------- Page: 9 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
Dimensions in millimetres
I
al Labyrlnth seal
b) Washer
Cigarette
R
n
I
ter
1,45
4,5 to 5,49 23
5,5 to 6,49 3
197
6,5 to 7,49 1,95
33
7,5 to 9 4
292
I details)
- Labyrinth seal and perforated disc (washer) (dimensiona
Figure 1 - Cigarette holder
4
---------------------- Page: 10 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
Labyrinth seals-
,Washer suppor
Labyrinth cap
smoke trom than one
NOTE - Washer support is fot- use where a central glass fibre smoke trap is used to trap
cigarette.
Figure 2 - Cigarette holder (schematic)
4.9 Cigarette Position (3.18)
5 Specification for th e routine ytical
Smoking machine
The angle formed by the longitudinal axis of the
cigarette and the horizontal plane shall be as small
The Smoking machine shall comply with the stan-
as possible; it shall not exceed IO0 if the centre of
dard conditions (see 4.1 and 4.10) and the following
the butt end is lower than the centre of the other
special conditions.
end, and 5” if the centre of the butt end is higher
than the centre of the other end.
The cigarette holders shall be arranged so that no
cigarette influences the burning of any other ciga-
rette.
5.1 Operating principle and puff Profile
4.10 Ashtray Position (3.21)
The machine shall include a device to draw a fixed
The ashtray shall be placed in a horizontal plane volume of air (puff) through a cigarette.
between 20 mm and 60 mm below the plane of the
NOTE 5 A schematic diagram is shown in figure3.
axes of the cigarettes.
---------------------- Page: 11 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
Dimensions in millmetres
L
1
-_----
I
r
Piston
Gas Phase
top dead centre Puff termination
out
Smoke trap device
, Butt length
Q
Piston pump
1
-9
I
I
I I
i
-w-w-----------
I
r 1
I
------
- ’
I
I L v--------D-----
J
I - Cigarette holder
I
sI1-:-, - Q
Port
I
-9
I
Swept v0lume-J LPuff volume
Channel
I
r --l
Figure 3 -
Smoking mackine schematics
5.1.1 The machine shall produce a hell-shaped puff puff volume of 35 ml without a pressure drop device,
Profile (see 4.5). a reduction of no more than 1,5 ml shall be observed
when the machine is tested with a pressure drop
device of 3 kPa.
51.2 The machine shall be a restricted smoker
(3.3).
5.2.3 The connecting piping between the smoke
trap and the suction Source shall offer the least
5.2 Reliability and compensatlon
possible resistance to flow. The pressure drop of the
total flow path between the butt end of the cigarette
The machine shall contain devices to control the puff
and the suction Source shall not exceed 300 Pa be-
volume, the puff duration, and the puff frequency.
fore Smoking (sec/ 4.1).
52.1 The machine shall possess the mechanical
5.2.4 The total dead volume (3.12) shall be as small
and electrical reliability necessary to meet the
as possible and shall not exceed 100 ml.
Standard conditions regarding thesc Parameters
(see 4.2 to 4.4) for prolonged periods.
5.3 Cigarette holders and smoke traps
52.2 The machine shall be capable of sufficient
compensation (3.17).
The machine shall contain devices for holding the
When the machine has initially been set to give a cigarette and for trapping the smoke produced.
6
---------------------- Page: 12 ----------------------
SIST ISO 3308:1995
ISO 3308:1991 (E)
drop of the filter assembly shall not exceed
53.1 The cigarette holders shall be capable of
900 Pa at this air velocity. The content of
holding the butt end of the cigarette during Smoking.
polyacrylate binder shall not exceed 5 % (m/m).
The Standard conditions relative to the length of butt
covered by this device and the airtightness of the
The filter assembly shall be capable of quantitatively
seal shall be as given in 4.8.
retaining all of the particulate matter in the main-
stream smoke produced by the cigarette without
Labyrinth Seals shall be used for attaching ciga-
loss. In addition, the filter assembly shall be Chosen
rettes.
so that the increase in pressure drop of the as-
sembly does not exceed 250 Pa when measured af-
5.3,2 Devices shall be provided for attaching ciga-
ter the Smoking run.
rette holders to the machine so that the cigarette
holders are held rigidly.
5.3.7 Esch channel shall have a puff termination
NOTE 6 A screwed fitting or “0” ring seal is rec-
device linked to a butt length (mark) Sensor and puff
ommended. Rubber tub
...
IS0
NORME
3308
I N TE R NAT1 O NA LE
Troisième édition
1991 -1 0-1 5
Machine à fumer analytique de routine pour
cigarettes - Définitions et conditions
normalisées
Roufine analytical cigarette-smoking machine - Definitions and
standard conditions
Numéro de référence
IS0 3308:1991(F)
---------------------- Page: 1 ----------------------
IS0 33081991(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d‘organismes nationaux de normalisation (comités membres
de I’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de I’ISO. Chaque comité membre inté-
ressé par une étude a le droit de faire partie du comité technique créé
à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I‘ISO participent également aux tra-
vaux. L’ISO collabore étroitement avec ia Commission électrotechnique
internationale (CEI) en ce qui concerne la normalisation électrotech-
nique.
Les projets de Normes internationales adoptés par les comités techni-
ques sont soumis aux comités membres pour vote. Leur publication
comme Normes internationales requiert l’approbation de 75 % au moins
des comités membres votants.
La Norme internationale IS0 3308 a été élaborée par le comité techni-
que ISOITC 126, Tabac et produits du tabac.
Cette troisième édition annule et remplace la deuxième édition
(IS0 3308:1986), qui a été entièrement révisée sur le plan technique et
rédactionnel, à la suite des importantes études menées par le CORESTA
sur les performances des machines à fumer.
Des modifications importantes ont également été faites au paragraphe
4.8, qui prescrit l‘emploi d‘un disque perforé (washer) estimé utile pour
pouvoir fumer tous les types de cigarettes. L’annexe A donne les
conditions estimées nécessaires pour le contrôle du flux d’air ambiant
autour des cigarettes dans les machines à fumer.
Une étude en commun réalisée par les membres du CORESTA a mis
en évidence que les modifications apportées améliorent la précision et
a permis d‘introduire des informations à ce sujet dans I’ISO 4387:1991,
Cigarettes - Détermination de la matière particulaire totale et de la ma-
tière anhydre et exempte de nicotine au moyen d‘une machine à
fumer analytique de routine.
L‘annexe A fait partie intégrante de la présente Norme internationale.
Les annexes B et C sont données uniquement à titre d‘information.
O IS01981
Droits de reprodudion réservés. Aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque krme que œ soit et par aucun proc6d6, Bledronique ou mécanique, y compris la
photocopie el les microfilms, sans raccord Bail de l‘édiieur.
Organisation internationale de normalisation
Cese postale 56 O CH-121 1 Genève 20 Suisse
Veisbn française tir& en 1992
Imprime en Suisse
ii
---------------------- Page: 2 ----------------------
IS0 3308:1991 (F)
Introduction
La présente Norme internationale décrit les spécifications qu’il a été
estimé nécessaire de fixer, à la lumière des connaissances et de I’ex-
périence acquise, sur les machines à fumer analytiques pour cigarettes.
---------------------- Page: 3 ----------------------
e
e
---------------------- Page: 4 ----------------------
NORME INTERNATIONALE IS0 33081991(F)
Machine à fumer analytique de routine pour cigarettes -
Définitions et conditions normalisées
matière particulaire totale et de la matière anhydre
1 Domaine d’application
et exempte de nicotine au moyen dune machine à
fumer analytique de routine.
La présente Norme internationale
IS0 6565:1983, Tabac et produits du tabac - Résis-
- définit les paramètres de fumage et spécifie les
tance au tirage des cigarettes et bâtonnets-filtres -
conditions normalisées à réaliser pour le fumage
Définitions, Conditions normalisées et considérations
mécanique analytique de routine des cigarettes;
générales.
- fournit les spécifications d‘une machine à fumer
IS0 7210:1983, Machines à fumer pour tabac et pro-
analytique de routine permettant de respecter
duits du tabac - Méthodes d‘essais non habituels.
les conditions normalisées.
NOTE I L‘annexe A spécifie les vitesses de l’air am-
3 Définitions
biant autour des cigarettes dans une machine à fumer
la conception mécanique de I’en-
analytique de routine,
Pour les besoins de la présente Norme internatio-
ceinte les entourant immédiatement et les méthodes de
mesure du flux d’air, y compris l’indication de l’endroit où nale, les définitions suivantes s’appliquent.
la vitesse de l’air doit être mesurée.
3.1 conditions ambiantes: Ensemble des paramè-
L‘annexe 6 décrit, à titre d’exemple, les caractéristiques
tres variables qui caractérisent physiquement la si-
spécifiques d‘une machine à fumer type comportant un
tuation du local et l’environnement dans lesquels le
mécanisme d’aspiration à piston.
fumage analytique s‘est effectué.
L‘annexe C donne une représentation schématique d’un
profil de bouffée et explicite certaines définitions et
3.2 longueur du mégot: iongueur de la partie non
conditions normalisées.
consumée de la cigarette subsistant à l’instant où le
fumage est arrêté.
2 Références normatives
3.3 fumage fermé: Condition réalisée lorsque I’ex-
trémité bouche de la cigarette est isolée de I’at-
Les normes suivantes contiennent des dispositions
mosphère entre les bouffées successives.
qui, par suite de la référence qui en est faite,
constituent des dispositions valables pour la pré-
3.4 fumage ouvert: Condition réalisée lorsque l’ex-
sente Norme internationale. Au moment de la pu-
trémité bouche de la cigarette est en communication
blication, les éditions indiquées étaient en vigueur.
avec l’atmosphère entre les bouffées successives.
Toute norme est sujette à révision et les parties
prenantes des accords fondés sur la présente
3.5 perte de charge: Différence de pression stati-
Norme internationale sont invitées à rechercher la
que entre deux points du circuit pneumatique d’une
possibilité d’appliquer les éditions les plus récentes
machine à fumer parcouru par un courant d’air dont
des normes indiquées ci-après. Les membres de la
le débit d‘écoulement constant est de 17,5 ml/s.
CE1 et de I’ISO possèdent le registre des Normes
internationales en vigueur à un moment donné.
NOTE 2 Le terme résistance au tirage a un sens très
voisin. Pour éviter toute confusion, le terme résistance au
IS0 3402:1991, Tabac et produits du tabac - Atmos-
tirage est utilisé pour les cigarettes et les bâtonnets-
phère de conditionnement et d‘essai.
filtres, tandis que le terme perte de charge est utilisé par
analogie dans le cas du circuit pneumatique d’une ma-
IS0 4387:1991, Cigarettes - Détermination de la
chine à fumer.
1
---------------------- Page: 5 ----------------------
IS0 3308 991 (F)
3.20 fumée latérale (secondaire): Totalité de la fu-
3.6 durée de l’aspiration: Intervalle de temps pen-
mée quittant la cigarette pendant le fumage, au-
dant lequel l‘orifice d‘aspiration est ouvert vers le
trement que par l’extrémité bouche de la cigarette.
mécanisme d’aspiration.
3.21 cendrier: Dispositif placé sous les cigarettes,
3.7 volume de la bouffée: Volume quittant I’extré-
maintenues dans leurs porte-cigarettes, destiné à
mité bouche de la cigarette et traversant le piège à
récolter les cendres tombant des cigarettes pendant
fumée.
le fumage.
3.8 nombre de bouffées: Nombre de bouffées ef-
3.22 bouffée de balayage: Toute bouffée effectuée
fectuées pour fumer une cigarette jusqu’à la lon-
après que la cigarette ait été éteinte ou retirée du
gueur donnée de mégot.
porte-cigarettes.
3.9 fréquence des bouffées: Nombre de bouffées
4 Conditions normalisées
en un temps donné.
3.10 fin de l‘aspiration: Arrêt de la communication 4.1 Perte de charge (3.5)
entre l’orifice d‘aspiration et le mécanisme d‘aspi-
L’ensemble du circuit d’aspiration entre l’extrémité
ration.
bouche de la cigarette et le mécanisme d’aspiration
doit offrir la résistance à l’écoulement la plus faible
3.11 profil de la bouffée: Débit mesuré directement
possible. Sa perte de charge ne doit pas dépasser
derrière l‘extrémité bouche de la cigarette et repré-
300 Pa.
senté graphiquement en fonction du temps.
4.2 Durée de l’aspiration (3.6)
3.12 volume mort total: Volume qui existe entre
l’extrémité bouche de la cigarette et le mécanisme
La durée normalisée de l’aspiration est de 2,O s,
d’aspiration.
avec un écart-type ne dépassant pas 0,05 s pour les
bouffées individuelles .
3.13 porte-cigarettes: Dispositif destiné à maintenir
l’extrémité bouche de la cigarette pendant I’opé-
ration de fumage. 4.3 Volume de la bouffée (3.7)
Le volume normalisé de la bouffée, mesuré en série
3.14 piège à fumée: Dispositif destiné à recueillir la
avec une résistance au tirage de 1 kPa, doit être de
quantité de fumée d’un échantillon de cigarettes
35 ml avec un écart-type, pour les bouffées indivi-
nécessaire à la détermination des composants de la
duelles, ne dépassant pas 0,15 ml. Pendant la durée
fumée.
d’une aspiration (3.6) au moins 95 YO du volume de
la bouffée doivent avoir quitté l’extrémité bouche de
3.15 orifice d’aspiration: Ouverture du mécanisme
la cigarette.
d’aspiration à travers lequel s’effectuent les bouf-
fées et à laquelle vient s’adapter le piège à fumée.
4.4 Fréquence des bouffées (3.9)
3.16 canal: Element d’une machine à fumer,
La fréqüence normalisée des bouffées doit être
constitué d’un ou de plusieurs porte-cigarettes, d’un
d’une bouffée toutes les 60 s, avec un écart-type ne
piège et d’un système permettant de tirer les bouf-
dépassant pas f 0,5 s.
fées à travers le piège.
4.5 Profil de la bouffée (3.11)
3.17 compensation: Aptitude à maintenir constants
le volume et le profil de la bouffée lorsque la perte
Le profil de la bouffée, mesuré sur une cigarette non
de charge au niveau de l‘orifice d‘aspiration change.
allumée, doit être en forme de cloche, avec un
maximum de 0,8 s et 1,2 s à partir du début de la
3.18 position de la cigarette: Disposition de la ci-
bouffée. Les parties ascendante et descendante du
garette sur la machine à fumer. Elle est précisée,
diagramme ne doivent pas présenter plus d‘un point
en particulier, par l’angle formé par l’axe longitudi-
d‘inflexion chacune. Le maximum du débit d’écou-
nal de la cigarette et le plan horizontal, lorsque la
lement doit être compris entre 25 ml/s et 30 ml/s
cigarette est insérée dans un porte-cigarettes d’une
(voir annexe B). La direction du flux d’air ne doit
machine à fumer analytique.
être inversée à aucun point.
3.19 fumée du courant principal: Totalité de la fu-
NOTE 3 Le principe du mécanisme d’aspiration utilisant
mée quittant l‘extrémité bouche de la cigarette
une pompe à piston pour réaliser le profil de la bouffée
pendant le fumage. est décrit en annexe B.
2
---------------------- Page: 6 ----------------------
IS0 33081991(F)
I 4.6 Fumage fermé (3.3)
4.10 Position du cendrier (3.21)
Une machine à fumer analytique doit assurer un fu-
Le cendrier doit être placé sur un plan horizontal
mage fermé.
entre 20 mm et 60 mm sous le plan des axes des
cigarettes.
4.7 Nombre de bouffées (3.8)
Chaque bouffée individuelle doit être décomptée et
enregistrée et le nombre de bouffées arrondi au
5 Spécifications de la machine à fumer
plus proche dixième de.bouffée rapporté à la durée
analytique de routine
de l’aspiration.
La machine à fumer doit respecter les conditions
4.8 Porte-cigarettes (3.13)
normalisées (voir 4.1 à 4.10) et les conditions parti-
culières suivantes.
Le porte-cigarettes normalisé doit recouvrir
9 mm f 0,5 mm à partir de l‘extrémité bouche de la
cigarette; il doit être imperméable aux constituants
de la fumée et à l’air. Le porte-cigarettes normalisé 5.1 Mode opératoire et profil de bouffée
doit garantir que la fuite entre la cigarette et le
porte-cigarettes n’est pas supérieure à 0,5 % du
La machine doit comporter un dispositif permettant
0 volume de la bouffée.
d’aspirer un volume d’air déterminé (bouffée) à tra-
vers une cigarette.
Le porte-cigarettes ou le piège à fumée doit contenir
un disque perforé (washer) en caoutchouc synthéti-
NOTE 5 Un diagramme schématique est présenté en
que expansé en mousse de cellules fermées qui
figure 3.
obstrue partiellement l’extrémité bouche de la ciga-
rette. Le caoutchouc synthétique doit avoir une
densité de 150 kg/m3 à 170 kg/m3, un faible gon-
5.1.1 La machine doit fournir un profil de bouffée
flement à l’huile et une plage de compression-
en forme de cloche (voir 4.5).
relaxation allant de 35 kPa à 63 kPa. Le maintien de
la cigarette est assuré par quatre joints-labyrinthe,
dont le plus proche de l’extrémité bouche de la ci-
5.1.2 La machine doit assurer un fumage fermé
garette (le joint de fond) est inversé. Les dimensions
(3.3).
du disque et des joints sont indiquées sur la
figurel. Le disque perforé est maintenu dans une
bague et s’appuie contre une paroi dans le centre
5.2 Fiabilité et compensation
de laquelle est ménagé un trou rond de 4 mm de
diamètre. L‘ensemble doit être construit de manière
La machine doit comporter des dispositifs pour le
à assurer le contact entre l’extrémité bouche de la
contrôle du volume de la bouffée, de la durée de
cigarette et le disque perforé lorsque la cigarette est
l’aspiration et de la fréquence des bouffées.
insérée à une profondeur de 9 mm, mesurée depuis
la ligne de contact du joint-labyrinthe frontal.
5.2.1 La machine doit présenter la fiabilité méca-
NOTE 4 Un exemple d’exécution pratique d’un tel as-
semblage est illustré en figure2. nique et électrique nécessaire pour que les condi-
tions normalisées relatives aux paramètres (4.2 à
4.4) soient respectées pendant des périodes de
4.9 Position de la cigarette (3.18)
temps prolongées.
L’angle formé par l’axe longitudinal de la cigarette
et le plan horizontal doit être aussi petit que possi-
ble; il ne doit pas dépasser 10°si le centre de I’ex- 5.2.2 La machine doit avoir des caractéristiques de
trémité bouche est plus bas que le centre de l’autre compensation suffisantes (3.17).
extrémité et 5O si le centre de l’extrémité côté bou-
La machine étant initialement réglée pour donner le
che est plus haut que le centre de l‘autre extrémité.
volume de 35 ml sans résistance au tirage, on ne
Les porte-cigarettes doivent être disposés de facon doit pas observer une diminution de plus de 1,5 ml
qu’aucune cigarette n’influence la combustion d’une lorsque la machine est essayée avec une résistance
autre. au tirage de 3 kPa.
3
---------------------- Page: 7 ----------------------
~
IS0 3308:1991 (F)
Dlmenslons en mllllmètres
a) Jolnt-Labyrlnthe
+
4
b) Disque perforé
Diamètre
de
e
4,5 à 5,49
1,45 1,95 22 1,7 -2m 3,5
5,5 6,5 7,5 à à à 6,49 7,49 9
4
---------------------- Page: 8 ----------------------
IS0 3308:1991(F)
disque
Douille-la bvrinthe
Joint-labyrinthe inversé
a
NOTE - Utilisation avec un piège en fibre de verre central pour récupérer la fumée de plusieurs cigarettes.
Figure 2 - Schéma de porte-cigarettes
---------------------- Page: 9 ----------------------
IS0 3308:1991 (F)
Dimensions en millimètres
L
-1
I
r
Position de la tête du piston Sortie
Dispositif d'arrêt
en bout de course phase gazeuse
c
d'aspiration U
Piège à fumée
I A
/i
n
Longueur de mégot
Volume de bouffée
C
U
P
Figure 3 -- Schéma de machine à fumer
6
---------------------- Page: 10 ----------------------
IS0 33081991(F)
5.2.3 La canalisation de raccordement entre le inerte, de préférence transparent, muni de
piège à fumée et le mécanisme d’aspiration doit of- capuchons hermétiques en même matériau,
frir la résistance à l’écoulement la plus faible pos- conçu pour contenir un disque filtrant en fibre de
sible. La perte de charge de l’ensemble du circuit verre de 1 mm à 2 mm d’épaisseur. La face
rugueuse du filtre doit être tournée vers l’arrivée
d’aspiration entre l’extrémité bouche de la cigarette
de la fumée.
et la source d‘aspiration ne doit pas dépasser
300 Pa avant fumage (voir 4.1).
NOTES
5.2.4 Le volume mort total (3.12) doit être aussi
7 Deux exemples sont donnés à la figure4.
petit que possible et ne pas excéder 100 ml.
8 Différents types de construction de pièges a fumée
5.3 Porte-cigarettes et pièges à fumée peuvent satisfaire. II est toutefois recommandé d’uti-
liser des filtres en fibre de verre d’un diamètre de
44 mm lorsque la machine à fumer est concue pour le
La machine doit comporter des dispositifs assurant
fumage de cinq cigarettes par piège. Pour les machi-
le maintien de la cigarette et le piégeage de la fu-
nes destinées au fumage de 20 cigarettes par piège,
mée produite.
le diamètre du disque en fibre de verre devrait me-
surer 92 mm.
5.3.1 Les porte-cigarettes doivent assurer le main-
tien de l’extrémité bouche de la cigarette pendant
- Un matériau filtrant retenant au moins 99,9 YO de
le fumage. Les conditions normalisées relatives à la
toutes les particules, d’un diamètre égal ou SU-
longueur du mégot recouverte par ce dispositif et à
périeur à 0,3 pm d’un aérosol de phtalate de
l’étanchéité de la jonction doivent être comme indi-
dioctyle, en suspension dans un courant d’air
qué en 4.8.
animé d’une vitesse linéaire de 140 mm/s. La
perte de charge de l’ensemble filtrant ne doit pas
Un joint mécanique à labyrinthe est recommandé
dépasser 900 Pa à cette vitesse. La teneur en
pour la fixation des cigarettes.
liant polyacrylique ne doit pas représenter plus
de 5 YO (mlm).
5.3.2 Des dispositifs doivent être prévus pour fixer
les porte-cigarettes sur la machine
...
Questions, Comments and Discussion
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