GENERAL TOPICS IN METROLOGY AND MEASUREMENT TECHNOLOGY: DIMENSIONESS UNITS AND NUMBERS

摘要

The theory of measurement scales is used to show that there is no foundation for attempting to extend the SI system to measurements of quantities and properties which are described by ordering and naming scales or by absolute scales. It is proposed that the units of planar and solid angles should be considered to be outside the system. Dimensionless quantities are conditionally classified. An analysis is made of specified order scales in which the concept of a "unit of measurement" is not applicable and for which it makes no sense to attribute dimensionality to the numbers and scale points used in them.