Flow calorimeter for equipment test

The efficiency of power supplies and power electronic converters is increasing. The loss measurement is often the difference between much lager numbers. The output frequency can be high or the output may require a high number of wires, which make the power measurement difficult. The presented flow calorimeter is intended for equipment test but it is also suited for passive component test in the range of 4-80 W losses. A compact design is obtained having an inner room (in mm) of 220times260times180 high and outer dimensions of 280times320times290 high. It is simple in realization and transportable