New Holland E225BSR, Workshop Manual

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1. OUTLINE
1-6
1.2 INTERNATIONAL UNIT SYSTEM
Introduction
Although this manual uses the SI units system. Outline
of SI units system is described here.
Given hereinunder are an excerpt of the units that are
related to this manual :
1. Etymology of SI Units
English : International System of units
2. Construction of SI Unit System
(1) Basic Units
(2) Supplementary Units
(3) Derived Units of Basic Units
(4) Derived Units bearing Peculiar Designations
(5) Prefixes of SI
Table1-1
QUANTITIES DESIGNATION SIGN
Length
Mass
Time
Current
Thermodynamic
temperature
Gram molecule
Luminous intensity Meter
Kilogram
Second
Ampere
Kelvin
Mol
Candela
m
kg
s
A
K
mol
cd
Table1-2
QUANTITIES DESIGNATION SIGN
Plain angle
Solid angle Radian
Steradian rad
sr
Table1-3
QUANTITIES DESIGNATION SIGN
Area
Volume
Velocity
Acceleration
Density Square meter
Cubic meter
Meter per second
Meter per second / second
Kilogram per cubic meter m
2
m
3
m/s
m/s
2
kg/m
3
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
Table1-4
QUANTITY UNIT SYMBOL FORMULA
Frequency hertz Hz 1Hz=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
Table1-5
PREFIX
POWER
DESIGNATION SIGN
Giga G 10
9
Mega M 10
6
Kilo k 10
3
Hecto h 10
2
Deca da 10
Deci d 10
–1
Centi c 10
–2
Milli m 10
–3
Micro
μ
10
–6
Nano n 10
–9
Pico p 10
–12