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ABSTRACT
The article commences by differentiating between absorption power meters and through-type instruments; thereafter it concentrates on the former method.
The effect of mis-matching source and load is explained. A description of the design and construction of two types of power meters is given: (i) using a resistive load and thermocouple, and (ii) an instrument using a thermistor as the load.
The article concludes with a short outline of calorimetric methods of measurement.