DC Voltmeters
DC Voltmeter Block Diagram DC voltmeter mainly consists of a dc amplifier apart from the attenuator, as shown in figure. DC Voltmeter Block Diagram DC voltmeters can further be divided into two...
View ArticleAC Voltmeters
In electronic ac voltmeters input signal is firstly rectified and then supplied to the dc amplifier, as shown in figure. Sometimes signal is firstly amplified by ac amplifier and then rectified...
View ArticleRMS Reading Voltmeter
True RMS Reading Voltmeter RMS value of the sinusoidal waveform is measured by the average reading voltmeter of which scale is calibrated in terms of rms value. This method is quite simple and less...
View ArticleBalanced Bridge Voltmeters
Balanced Bridge Voltmeters Such voltmeters can be used for measurement of both dc and ac voltages and are very popular. These voltmeters are available in both versions, vacuum tube type and...
View ArticleGalvanometers
Electronic Galvanometers A vacuum tube or transistor amplifier, followed by a milli-ammeter may be employed as a detector. Some of such devices have arbitrary scale values, sometimes with variable...
View ArticleElectronic Multimeters
Electronic Multimeters It is one of the most versatile general purpose instruments capable of measuring dc and ac voltages as well as current and resistances. The solid-state electronic multimeter (or...
View ArticleQ-Meter
Q-Meter We know that every inductor coil has a certain amount of resistance and the coil should have lowest possible resistance. The ratio of the inductive reactance to the effective resistance of the...
View ArticleCRO-Cathode Ray Oscilloscope
Introduction to CRO – Cathode Ray Oscilloscope The cathode ray oscilloscope is an extremely useful and versatile laboratory instrument used for studying wave shapes of alternating currents and voltages...
View ArticleCRT-Cathode Ray Tube
Cathode ray tube essentially consists of an electron gun for producing a stream of electrons, focusing and accelerating anodes for producing a narrow and sharply focused electron beam, horizontal and...
View ArticleBasic Controls of a CRO
Number of controls are required to be provided on a panel of CRO to facilitate its proper functioning. Intensity control is provided for adjustment of brightness of the spot on the screen. It is...
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