testing of transformer oil samples in 220kv s/s of smelter plant , dissolved gas analysis , is:1866-2000 . , electric strength , is:1866-2000 , water content , is:1866-2000 . , dielectric dissipation factor ( tan delta ) , is:1866-2000 . , specific resistance , is:1866-2000 . , flash point , is:1866-2000 . , neutralisation value ( acidity ) , is:1866-2000 . , interfacial tension , is:1866-2000 . , sediment & sludge content , is:1866-2000 . , oil testing using mobile laboratory at smelter site which includes interfacial tension , flash point , neutralization value , electrical strength ( bdv ) , dielectric dissipation factor ( tan delta ) , specific resistance ( resistivity ) , water content , sludge content , dga ( for methane , ethane , ethylene , acetylene , hydrogen , oxygen , nitrogen , carbon monoxide , carbon dioxide ) . , furan analysis test charges per sample iec 61198-1993 , astm 5837-99 . , degree of polymerization . , testing of new transformer oil under is:335-1993 ( the test shall include appearance , density , kinematic viscosity , interfacial tension ( ift ) , flash point , pour point , neutralization value ( acidity ) , corrosive sulphur , electric strength ( bdv ) , dielectric dissipation factor ( tan delta ) , specific resistance ( resistivity ) , oxidation stability , presence of oxidation inhibitor , water content , ageing characteristics , s . k . value etc . ) ,