Measurement Of Power
R. J. Halford · 1972
The instruments available to measure power in electronic engineering are somewhat restricted when compared with the wide range of equipment to measure other parameters. These instruments can be divided into two general groups; those that are true power measuring instruments, that is, they indicate the power dissipated in the device under test, and a second group which are absorption meters that dissipate the power in the instrument from the source under test, and indicate the power available. Instruments in the first group of power measuring devices fall into four distinct types. Each type has some special features that will make it suitable or otherwise depending on the particular application. The general characteristics of the four types are as follows.