Contents 1 Scope 2 References 3 Terms and unit of measurement 4 Overview 5 Requirements for metrological performance 5.1 Instrument zero drift 5.2 Instrument indication stability 5.3 Instrument repeatability 5.4 Instrument indication error 6 General technical requirements 6.1 Appearance 6.2 Insulation resistance 7 Measuring instrument control 7.1 Verification conditions 7.2 Verification items 7.3 Verification method 8 Verification results handling 9 Verification cycle Annex A Preparation Zero Turbidity Water Annex B Calibration of Turbidity Standard Piece Annex C Format of Verification Record Annex D Format of Inside Page of Verification Certificate Annex E Format of inside page of verification results notification
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