These standards apply to the metrological certification review work of the following quality inspection agencies: (a) Quality inspection agencies affiliated with water conservancy and hydropower engineering and product safety. (b) Engineering and product quality inspection agencies and water environment monitoring agencies of watershed agencies. (c) Quality inspection agencies for scientific research institutes, design and construction units in the water conservancy industry. (d) Monitoring agencies in the water conservancy industry responsible for monitoring water resources and water environment. (e) Other quality testing/calibration institutions that undertake quality inspection tasks for water conservancy projects and products nationwide or across regions
SL 309-2007 history
2013SL 309-2013 Assessment criterion of metrology accreditation for quality testing institute of water resources
2007SL 309-2007 Assessment criterion of metrology accreditation for quality test institute of water resources
2004SL 309-2004 Assessment criterion of metrology accreditation for quality test institute of water resources