Download - measurement, instruments
SCALE/ Steel Ruler
CLOCK
Blood pressure gauge
THERMOMETER
Automobile speedometer
ODOMETER
Electric Meter Display
Electric Units Consumed (KwH)
TACHOMETER
WHY WE NEED INSTRUMENTS?
The human senses cannot provide exact quantitative information about the events occurring in our environment.
Scientific Instruments allow the human to observe and measure aspects of physical universe beyond the range and precision of the unaided human senses.
Instruments are the essential extensions
of human sensing and perception without which
scientific exploration of nature would be impossible.
WHERE ARE THESE TOOLS USED?
Basic to all engineering is
designand basic to all design is the
making of measurements.
“WHATEVER EXISTS, EXISTS IN SOME AMOUNTS.”
“If an engineer were to deprived of his
measuring devices, he would be
reduced to guessing and speculation.”
MEASUREMENT
Measurement is a means for describing the various physical and chemical parameters of materials in quantitative terms.
The result of measurement is expressed as
Unknown Quantity -----------------------------------------------------------------------------
Adopted Standard
Ex. 10cm length implies that the object is 10 times as large as 1 cm (standard)
For consistence and quantitative comparison of physical parameters,
certain standards of mass, length, time, temperature and
electrical quantities have been established.
Any Questions