ABBE REFRACTOMETER - REFRACTIVE INDEX AND REFRACTIVE DISPERSION OF HYDROCARBON
ASTM D1218 - NFT 60194
ASTM D 1218
This test method covers the measurement of refractive indexes, accurate to six units in the fifth decimal place and refractive dispersions, accurate to twelve units in the fifth decimal place, of transparent and light, coloured hydrocarbon liquids that have refractive indexes in the range from 1.33 to 1.50, and at temperatures from 20 to 30 °C.
This test method covers the determination of refractive index of aqueous fluids, for the work of metal, in the range from 1.300 to 1.600 at temperatures from 20 to 40°C, and the colour of which determined by NFT 60104 is below 6.
Precision refractometer, range from 1.3 to 1.7 with thermometer (0 to 75°C), plate and standard liquid, scale lightning, calibration table for sodium lamp 589.6nm, accuracy 0.00004 unit.