What is Permanent Magnet Moving Coil (PMMC) Galvanometer and its feature?
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It is a Electromechanical measurement Instrument. Very small amount of current and voltage can be measured by this instrument.
Its features:
Can work without any additional power supply
User‘s eyes are sensitive to movement of indicator
Simplicity, reliability and low price
Sensitive to shocks, aging
Do not provide electrical output signal, need for operator’s activity during measurements
Accuracy is affected by parallax error