標準號：IS 3506-1989
發(fā)布日期：1991/6/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard covers two tables. Pykno-meter tables (Table 1) give the apparent specific gravity or apparent relative density, t°/t°, measured in air using 50 ml capacity pykno-meter, that is, apparent mass of alcoholic liquid at t°C/apparent mass of water at t°C, against the ethanolic content at 20°C in the alcoholic liquid at 20°C that is real strength 20°/20° or volume percent of ethanol at 20°C. Table 2 gives the minor corrections for conversion of ethanolic real strength at 20°C to that at 15°C or 15.56°C which may be required under the present Excise Rules until the international system of real strength at 20°C is adopted for excise purposes in our country.1.1.1 Though the Indian ambient temperatures vary greatly from 20°C, the OIML data which has been utilized in constructing these pykno-meter tables, allow for apparent specific gravity measurements to be carried out in the entire temperature range of relevance here, namely 10 to 40°C, without sacrificing the ultimate accuracy of the results achieved through the OIML data.