In this topic, you study the types of measurement.
There are following types of measurement;
(1) Primary Measurements: The measurement obtained directly by observation and comparison is called primary measurement, It needs no convertion, e.g., measuring length, time, mass of a bodv etc.
(2) Secondary Measurements: These measurements involve one conversion. e.g. measurement of pressure. In this. pressure will be converted into a suitable form by a transducer and then fed to the instrument.
(3) Tertiary Measurement: The measurements involve two conversions of the quantity under measurement. e.g. temperature measurement by thermocouple. In this measurement. the temperature is first converted into voltage, which is again converted into the legible (readable) form through a meter.
