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Measurements & Electrical Analog Devices. Introduction . Analog Devices: Current Measurements Analog Devices: Voltage Measurements Analog Devices: Resistance Measurements. Direct Current Measurement.
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Introduction • Analog Devices: Current Measurements • Analog Devices: Voltage Measurements • Analog Devices: Resistance Measurements
Direct Current Measurement • Simplest way – responds to the force exerted on a current-carrying conductor in magnetic field
Direct Current Measurement • Application: D’ Arsonval movement inside an ammeter
Alternating Current Measurement • First technique – uses diode – converts ac current into dc current • Other technique – employ electromagnets (Magnetic field increases with increasing current flow) • For large ac current – Hall effect
Voltage Measurements • Analog Voltage Meters
Voltage Measurements • Oscilloscope
Voltage Measurements • Potentiometer
Resistance Measurements • Ohmmeter
Resistance Measurements • Bridge Circuits