StandardDetails

1.1 This Recommendation applies to working automated refractometers powered by mains or battery, which have either just been manufactured, are in service, or which have just been repaired. 1.2 This Recommendation lays down the methods and means of verification for working automated refractometers used in the determination of the relative refractive index of liquids, solids and their dispersion, as well as quantities that are functionally related to the refractive index, for example, the mass fraction of solutions. 1.3 The purpose and intended scope of the working automated refractometers are given in Table 1 (See Annex 1). Automated refractometers functioning on the basis of interference and goniometric methods for the measurement of the composition of liquid media based on the difference in refractive indices between a controlled solution and a standard one, as well as specialized refractometers, are not covered by the scope of this Recommendation. Note: The statements of the present Recommendation do not affect OIML R 124 “Refractometers for the measurement of the sugar content of grape must”.