采用IEC 60814第2版（1997）规定了在试验温度下测定单相绝缘液体材料的介电损耗因数（tan（）、相对介电常数和直流电阻率的方法。这些方法主要用于对未使用的液体进行参考试验，但也适用于变压器、电缆和其他电气设备中使用的液体。还包括常规测试的简化程序。

Adopts IEC 60814, Ed. 2 (1997) to specify methods of determination the dielectric dissipation factor (tan (), relative permittivity and d.c. resistivity of single phase, insulating liquid materials at the test temperature. The methods are primarily intended for making reference tests on unused liquids but can also be applied to liquids in service in transformers, cables and other electrical apparatus. Simplified procedures are also included for routine testing.