Portable transformer oil tester can working both in the ... D1816, IEC156, ASTM D899, etc. which adopts industrial single plate integrated circuit, new-style I/O ports, with unique ... Tests to: IS 6792, IEC 156, ASTM D1816, JIS C2101, BS 5874, VDE 0370, ASTMD 877 etc. . Indicators for – Power ... Zero start safety and test chamber access interlock. Model SY Portable transformer oil tester instruments