Electrical Instrumentation And Measurement. Practically secondary instruments are suitable for measurement. Classification, absolute and secondary instruments, indicating instruments, control, balancing and damping, constructional details, characteristics, errors in measurement, ammeters,.

One is the type of measuring instruments that show the values on the scale of the meter, and other are type of measuring instruments that displays the waveforms. The measuring quantity can be voltage, current, power and energy etc. Classification, absolute and secondary instruments, indicating instruments, control, balancing and damping, constructional details, characteristics, errors in measurement, ammeters,.