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TAPER II(a)
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CORESTA Recommended Method No.25
Ambient air flow around cigarettes in routine analytical
smoking machines : Control and monitoring
O.
INTRODUCTION
The development of smoking machines has taken place over perhaps 45
years. However because the mechanical configurations which can meet
this Recommended Method differ greatly, it has been found from the
work of a special Task Force*, established by CORESTA, that additional
specification of the immediate smoking machine environment is
necessary. This leads to better reproduciblety in the international
inter-laboratory comparisons which are often required. It i
doubtful if a general mechanical specification can be written to cover
all types of smoking machine and so, as well as a general
specification, it is necessary to provide examples for the designs
most generally used.
There are two principal designs which satisfy CORESTA Recommended
Method RM No.22:
- type (a) in which the position of the cigarette in its holder is
device;
fixed, i.e. adjustments are made by moving the puff termination
- type (b) in which the position of the puff termination device is
holder.
fixed, i.e. adjustments are made by moving the cigarette and its
1.
FIELD OF APPLICATION
This Recommended Method
- specifies the ambient air velocities surrounding cigarettes in an
analytical smoking machine during the smoking process and mechanical
design of the enclosures immediately surrounding then;
- specifies the methods of air velocity measurement and the location
where air velocity shall be measured.
"The Task Force, composed of members of the CORESTA Smoke & Technology
Groups, has conducted collaborative studies in 1988, 1989 and 1990.
The studies have already resulted in the production of Recommended
Methods RM21, 22, 23 and 24.
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