GDYJ-502A ASTM D877 Oil BDV Tester ready for shipment Last week we completed the production for GDYJ-502A 80KV Transformer Oil BDV Tester for our valued customer.GDYJ-502A is designed as per IEC60156, IS6792, BS5874, ASTM D1816 , ASTM D877. The output is 80KV. 100KV can be customization. Large touch screen. build-in temperature sensor can detect and di