how to measure a DC/DC converters

measurement circuit for DC/DC converters

TOPPOWER can produce:0.1W-40WDC-DC converters,1W-30WAC-DC converters,(SIP/DIP/SMD)

15W-1200W Enclosed/Openframe/DIN rail type AC-DC Switching Power supply

,TOPPOWER quality :ISO9001:2015, IATF16949:2016