Measuring Instruments

AC Potentiometer An AC potentiometer basically works on the same principle as a DC potentiometer. However, there is one very important difference between the two. In DC potentiometer, only the …

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DC Potentiometer DC potentiometer is used for measuring and comparing the e.m.fs. of different cells and for calibrating and standardizing voltmeters, ammeters etc. In its simplest from, it consists of …

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Electrodynamic Power Factor Meter Working Principle of Electrodynamic Power Factor Meter The Electrodynamic Power Factor Meter is based on the dynamometer principle with spring control removed. Figure A Construction of …

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Moving iron Power Factor Meter Construction of Moving iron Power Factor Meter One type of power factor meter suitable for 3-phase balanced circuits is Moving iron Power Factor Meter shown …

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Moving-iron Frequency Meter Working Principle of Moving-iron Frequency Meter: The action of Moving-iron Frequency Meter depends on the variation in current drawn by two parallel circuits – one inductive and …

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Electrodynamic Frequency Meter Electrodynamic Frequency Meter is also referred to as moving-coil frequency meter and is a ratiometer type of instrument. Working Principle of Electrodynamic Frequency Meter: The working principle …

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The Vibrating-reed Frequency Meter Working Principle – The Vibrating-reed Frequency Meter: The Vibrating-reed Frequency meter depends for its indication on the mechanical resonance of thin flat steel reeds arranged alongside …

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Vibration Galvanometer Vibration Galvanometers are widely used as null-point detectors in A.C. bridges. Construction of Vibration Galvanometers As shown in Figure A, it consists of a moving coil suspended between …

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Induction Type Wattmeters The two main types of wattmeters are The dynamometer or electrodynamic type wattmeter and the induction type wattmeters. Induction Type Wattmeters Principle of induction type wattmeters is …

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Dynamometer or Electrodynamic Type Wattmeter The two main types of wattmeters are The dynamometer or electrodynamic type wattmeter and the induction type wattmeter. Dynamometer or Electrodynamic Type Wattmeter The basic …

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