Secondary instruments work in two modes: (i) Analog mode, and (ii) Digital mode. Signals that vary in a continuous fashion and take on an infinite number of values in any given range are called analog signals. The devices which produce these signals are called analog devices. In contrast, the signals which vary in discrete steps
Analog and Digital Models of Operation Read More »
Comparing the advantages and disadvantages of the two types instruments. The accuracy of null type of instruments is higher than that of deflection type. This is because the opposing effect is calibrated with the help of standards which have high degree of accuracy. On the other hand, accuracy of deflection type of instruments is dependent
Comparison of Deflection and Null Type Instruments Read More »
In a null type of instrument, a zero or null indication leads to determination of the magnitude of measured quantity. The null condition is dependent upon some other known conditions. In contrast to deflection type of instruments, a null type instrument attempts to maintain the deflection at zero by suitable application of an effect opposing
Null Type Instrument (D.C Potentiometer) Read More »