ASTM D1807电绝缘液体折射指数和比光散度的标准试验方法
日期:2012-02-08 17:11
nds present in insulating oil. For convenience, the specific dispersion value is multiplied by 10 4. For electrical insulating mineral oils, the wavelengths of 6563 and 4861 ˚A corresponding to the spectral lines of hydrogen are commonly used. Alternatively, the wavelengths of 6678 and 5016 ˚A corresponding to the spectral lines of helium may be used.
1. Scope
1.1 These test methods cover the determination of the refractive index and the specific optical dispersion of electrical insulating liq
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09/11 14:11