Standards and standardization-
The essential set of standards about a system, process, service or product is called a standard. Standards are usually in the form of a document. Materials / tools / equipment manufactured in any country should be of a certain standard. The objective is to assess the quality of the product, reduce the time and cost in designing and developing the product, restricting the production of products of the desired size type and measurement unnecessarily, safety, convenience in choosing, buying and using, etc.
Certain standardization methods are necessary for the sale of Indian goods in the local and international markets. The Bureau of Indian Standards (BIS) specifies through booklets for its various items. Electrical appliances, tools, machines etc. all are certified by BIS (Indian Standards Institute).
System of units-
There remains an international body of measurement units known as the International Conference of Wet and Major. India is also a member of this institution.
The Indian Standards Institute has also held Indian SI since 1969. Asked to use the unit. The Indian Standards Institute unit meets the metric system.
S.I. The system has seven primary units, two complementary units and several derived units.
Primary Units
Complementary units-
Derivative Units -
The essential set of standards about a system, process, service or product is called a standard. Standards are usually in the form of a document. Materials / tools / equipment manufactured in any country should be of a certain standard. The objective is to assess the quality of the product, reduce the time and cost in designing and developing the product, restricting the production of products of the desired size type and measurement unnecessarily, safety, convenience in choosing, buying and using, etc.
Certain standardization methods are necessary for the sale of Indian goods in the local and international markets. The Bureau of Indian Standards (BIS) specifies through booklets for its various items. Electrical appliances, tools, machines etc. all are certified by BIS (Indian Standards Institute).
System of units-
There remains an international body of measurement units known as the International Conference of Wet and Major. India is also a member of this institution.
The Indian Standards Institute has also held Indian SI since 1969. Asked to use the unit. The Indian Standards Institute unit meets the metric system.
S.I. The system has seven primary units, two complementary units and several derived units.
Primary Units
S.No.
|
Units
|
Units name
|
Symbol
|
1
|
Length
|
meter
|
m
|
2
|
Mass
|
Kilogram
|
Kg
|
3
|
Time
|
Second
|
s
|
4
|
Electric Current
|
Ampere
|
A
|
5
|
Thermodynamic
Temperature
|
Kelvin
|
K
|
6
|
Luminous Intensity
|
Candela
|
cd
|
7
|
Qauantity Of matter
|
Mole
|
mol
|
Complementary units-
S.No.
|
Units
|
Units name
|
Symbol
|
1
|
Plane Angle
|
Radian
|
rad
|
2
|
Solid Angle
|
Steradian
|
sr
|
Derivative Units -
S.No.
|
Units
|
Units name
|
Symbol
|
1
|
Force
|
Newton
|
N
|
2
|
Area
|
Square meter
|
m2
|
3
|
Power
|
Watt
|
W
|
4
|
Resistance
|
Ohm
|
Ω
|
5
|
Density
|
Kg per Cubic meter
|
Kg/m3
|
6
|
Velocity
|
Matter per second
|
m/s
|
7
|
Capacitance
|
Farad
|
F
|
8
|
Magnetic Flux
|
Weber
|
Wb
|
9
|
Inductance
|
Henry
|
H
|
10
|
Pressure
|
Newton per square
meter
|
N/m2
|
11
|
Magnetic Flux Density
|
tesla
|
T or Wb/m2
|
12
|
Angular Velocity
|
Radian per second
|
rad/s
|
13
|
Work, Heat, Energy
|
Joule
|
J or N-M
|
14
|
Frequency
|
Hertz
|
Hz
|
15
|
Magnetic Field
Strength
|
Ampere per meter
|
A/m
|
16
|
Magnetic Motive Force
(MMF)
|
Ampere turn
|
AT
|
17
|
Electric Field
Strength
|
Volt per meter
|
V/m
|
18
|
Electric Charge
|
Coulomb
|
C
|
19
|
Potential, Potential
Difference
|
Volt
|
V
|
20
|
Luminous Flux
|
Lumen
|
lm
|
21
|
Illumination
|
Lux
|
Lx
|