Performance monitoring of colour measuring instruments

This technical report defines practical methods to be used for monitoring the performance of instruments used in the measurement of surface and/or transmitted colour. The report defines procedures to be used to monitor the performance of an instrument in terms of its repeatability (short term) and reproducibility (long term). The report covers performance monitoring of the following types of instrument when used for the measurement of surface or transmitted colour: tristimulus colorimeters; solid-state array spectrophotometers; and scanning spectrophotometers. This report does not define procedures for estimating the uncertainty of measurement and excludes performance monitoring of instruments that produce an absorbance or transmittance measurement with restricted spectral range of less than 400-700 nm.