IP 340 : 1992

General guide to the principles and methods used for calibrating and checking process analysers. It covers initial calibration in the factory or on the plant by either the reference sample or paired-sample method, analyser validation (i.e inservice checking) and supervisory checking including the use of control charts. Throughout this document the work 'analyser' denotes a process analyser, also variously described by users as stream analyser, on-line or in-line analyser, product quality monitor, etc. The code is not intended to cover automatic or semi-automatic instruments used mainly in laboratories to analyse discrete samples, though some of the principles and techniques described may apply to such instruments.