calibration of energy meter experiment

{"title":"Close-Link Three Phase Energy Meter Test Bench with Isolated CT for 24 Positions","imgUrl":"https:\/\/img.chinax.com\/nimg\/fc\/62\/c8e6347f4abd64d9d20dfb1c6fef-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"YOMIN","Model Number":"YM-S3000","Minimum Order Quantity":"1 Pieces","Delivery Time":"5-30 working days after receiving payment","Certification":"CE\/RoHS","Place of Origin":"Zhejiang , China (Mainland)","Payment Terms":"L\/C , T\/T , Western Union , Paypal","Supply Ability":"60000 per month","Packaging Details":"polybag+paper box+carton","Output voltage":"3 x 57.7\/100V\/220V\/380","Adjustment range":"0 to 120%","Harmonic output":"2nd to 21th","phase adjustment":"0 to 359.9\u00b0","Voltage output capacity":">15VA per postion","Usage":"ENERGY METER TEST"}}

{"title":"0.2 Class Single And Three Phase energy meter test bench With DDS Technology","imgUrl":"https:\/\/img.chinax.com\/nimg\/4f\/7e\/1a87a5e40b133ae96d41fe1e96ea-200x200-1.jpg","attrs":{"Brand Name":"GDZX","Model Number":"ZXDN-306","Minimum Order Quantity":"1Set","Delivery Time":"15-30 work days","Certification":"ISO9001","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram, D\/A, D\/P, WeChat, Paypal","Supply Ability":"1200sets\/year","Packaging Details":"Packing wooden case or carton","Device accuracy level":"0.02 level, 0.03 level, 0.05 level, 0.1 level (optional)","Output voltage range of each phase":"57.7V, 100V, 220V, 380V","Output current":"0.005A, 0.025A, 0.1A, 0.25A, 0.5A, 1A, 2.5A, 5A, 10A, 20A, 50A, 100A","Three-phase symmetry":"better than 120o \u00b1 0.3\u00b0","Standard crystal stability":"\u22643* 10-8\/S","Frequency meter accuracy":"\u00b10.1 Hz","Power supply":"3*220V \u00b1 10% \uff5e 50Hz","Working environment":"temperature 20\u2103, soil 5 \u2103, relative humidity \u226485%"}}