PMMC Instrument Archives | Electrical Concepts

PMMC Instruments – Construction and Working Principle

Permanent Magnet Moving Coil or PMMC Instruments are the most accurate type for the measurement of DC current or voltage. The working principle of PMMC instruments are same as that of d’Arsonaval type of Galvanometer, difference being that a direct reading instrument is provided with...

Continue reading » November 9, 2017 admin Measurement and Instrumentation 4 Comments

Sensitivity of PMMC Voltmeter

The current sensitivity of voltmeter of moving coil type like PMMC voltmeter is defined as the deflection per unit current in the coil. If Ɵ be the angular deflecting of needle of voltmeter for current I through the moving coil, then sensitivity of voltmeter is...

Continue reading » November 6, 2017 admin Measurement and Instrumentation No Comment

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PMMC Instruments – Construction and Working Principle

Sensitivity of PMMC Voltmeter

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