Case CX17B, Service Manual, Page: 17 / 41

1. OUTLINE
1-8
1.2 INTERNATIONAL UNIT CONVERSION SYSTEM (Based on MARKS'
STANDARD HANDBOOK FOR MECHANICAL ENGINEERS)
Introduction
Although this manual includes International System of Unit
and Foot-Pound System of Units, if you need SI unit, refer
to the following international system of units.
Given hereinafter is an excerpt of the units that are related
to this manual.
1. Etymology of SI Unites
French: Le Systeme International d' Unites
English: International System of Units
2. Construction of SI Unit System
SI unit
system
Prefixes of SI
(n-th power of 10, where n is an integer)
Table 1- 5
SI units
Base units
Table 1-1
Supplemen
tary units
Table 1-2
Derived units
of base units
Table 1-3
Derived units
bearing peculiar
designations
Table 1-4
Derived
units
(1) Base units
(2) Supplementary units
(3) Derived Units
(4) Derived Units bearing Peculiar Designations
Table 1-1
QUANTITY UNIT SYMBOL
Length meter m
Mass kilogram kg
Time second s
Electric current ampere A
Thermodynamic
temperature
kelvin K
Amount of
substance
mol mol
Luminous
intensity
candela cd
Table 1-2
QUANTITY UNIT SYMBOL
Plane angle radian rad
Solid angle steradian sr
Table 1-3
QUANTITY UNIT SYMBOL
Area square meter m
2
Volume cubic meter m
3
Velocity meter per second m/s
Acceleration meter per second squared m/s
2
Density kilogram per cubic meter kg/m
3
Table 1-4
QUANTITY UNIT SYMBOL FORMULA
Frequency hertz Hz 1/s
Force newton N kg • m/s
2
Pressure and
Stress
pascal Pa N/m
2
Energy, Work
and Quantity of
heat
joule J N•m
Power watt W J/s
Quantity of
electricity
coulomb C A•s
Electric
potential
difference,
Voltage, and
Electromotive
force
volt V W/A
Quantity of
static electricity
and Electric
capacitance
farad F C/V
Electric
resistance
ohm V/A
Celcius
temperature
celcius
degree or
degree
C
(t+273.15)K
Illuminance lux lx l m/m
2