T/SXICS 002-2023 Active

Scope: This document specifies the general requirements, metrological characteristics, calibration conditions, calibration items, and calibration methods for multi-parameter water quality analyzers, as well as the expression of calibration results and calibration intervals. This document applies to the calibration of multi-parameter water quality analyzers with the following measurement ranges: - Chemical oxygen demand (COD): (15–1000) mg/L - Total phosphorus: (0–1000) mg/L - Total nitrogen: (0–1000) mg/L - Ammonia nitrogen: (0–100) mg/L Main technical content: 1. Scope 2. Normative references 3. Overview 4. General requirements 5. Metrological characteristics 6. Calibration conditions 6.1 Environmental conditions 6.2 Measurement standards and other equipment 7. Calibration items and calibration methods 7.1 Calibration items 7.2 Calibration methods 8. Expression of calibration results 9. Calibration intervals Appendix A (informative): Example of uncertainty evaluation for temperature indication error Appendix B (informative): Example of uncertainty evaluation for chemical oxygen demand indication error Appendix C (informative): Example of uncertainty evaluation for total phosphorus indication error Appendix D (informative): Example of uncertainty evaluation for total nitrogen indication error Appendix E (informative): Example of uncertainty evaluation for ammonia nitrogen indication error Appendix F (informative): Format of the calibration certificate interior pages