This manual uses the International System of Units (SI) unit system for the pressure, force (load),
torque and stress. This manual adopts the international unit construction system (SI unit system)
followed by the conventional imperial and metric systems enclosed by ( ) and [ ] as described
below.
<Reference>
What is the SI unit system?
Although the measurement unit is standardized mostly with metric system in the world, the metric
system includes different kinds of unit systems. Though the metric system was established expecting
that a single unit system is used in the world, various physical units were established later, resulting in
branching the metric system in different unit systems. The new unit system is called International System
of Units because it was established for the purpose of unifying the different unit systems.
Since the metric system was initially established in France, and International Bureau of Weights
and
Measures (IBWM) is located in Paris, General Conference of Weights and Measures (GCWM)
passes a resolution of the international unit system as "Systéme International d'Unités (French)" that
is abbreviated as
SI unit .
For example, conventional metric system uses the unit of mass (kg) and
unit of force (kg or kgf) without
discriminating them, but the SI unit system uses, for example, kg as the
unit of mass, and N as the unit of force, aiming to apply a kind of unit for a kind of physical quantity.
To Next Page
Loading...