Zhejiang Institute of Metrology (ZJIM), founded in 1960, is a provincial-level legal metrology verification authority set by the metrological administrative division of The People's Government of Zhejiang Province in accordance with the law and authorized by the former Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China (AQSIQ). As a category-1 nonprofit public institution, ZJIM is one of the scientific research institutions enjoying major support of the Department of Science and Technology of Zhejiang Province. Its main responsibilities are to abide by requirements specified in Metrology Law of the People’s Republic of China, comprehensively ensure the unification of the system of units of measurement and the accuracy and reliability of quantity values throughout the province, and play the support and guarantee role of metrology work in social governance, scientific and technological innovation, industrial development and province-wide socio-economic development.
After more than 50 years’ development, ZJIM now boasts laboratories with an area of 30,000m2 and equipment assets valuing over RMB 300 million. It has set up 320 social public metrological standards in Zhejiang covering several disciplines and fields, and accomplished 929 verification, calibrating and test projects examined and authorized by legal metrology verification agencies, 624 projects accredited by national laboratories, and 226 test projects with 868 parameters certified by laboratory qualifications, including 30 projects in 12 categories authorized by national type evaluation laboratories, 61 projects in 28 categories authorized by provincial type evaluation laboratories and 5 projects authorized by national energy efficiency label test laboratories of electrical energy meters, water meters, gas meters and other measuring instruments. We are capable of conducting verification, calibration and full performance tests over measuring instruments and parameters in length, mechanics, thermology, electromagnetics, radio, acoustics, time frequency, chemistry, optics, ionizing radiation and other fields. A social public metrological standard system that serves the scientific and technological innovation and industrial transformation and upgrading as well as economic and social development in Zhejiang has been established to provide powerful support to the social and economic growth of Zhejiang.
The National Center of Quality Supervision and Testing on Electricity Meters (Zhejiang), affiliated to ZJIM, is a national-level quality supervision and test authority and type evaluation laboratory of electrical energy meters with third-party impartiality authorized by the former AQSIQ and Certification and Accreditation Administration of the People's Republic of China (CNCA). It is also a member of the Chinese revision group of OIML R 46 International Recommendations on Electrical Energy Meters. The Laboratory has participated in the revision of R 46 as early as in 2004 and established the first OIML international certified electrical energy meter test laboratory in China, the second in the world, in July 2014. Since acquiring the authorization in May 2014, it has provided technical advisory services and carried out tests concerning OIML R 46 International Recommendations for provincial and municipal enterprises throughout the country. Up to now, more than 20 technical advisory projects were undertaken and over 10 OIML R 46 full performance entrusted test reports were issued. Particularly in March 2017, it accomplished the type evaluation test of the new intelligent electrical energy meter for an enterprise in Zhejiang and issued the first OIML type evaluation test report of electrical energy meter in China.
The National Quality Supervision and Inspection Center for Liquid Flow Measuring Instruments of ZJIM was approved for establishment by the former AQSIQ in 2011 and acquired the national laboratory qualification certification and national laboratory accreditation in October 2015, meaning that it has the capabilities and qualifications to provide the society with the type evaluation, inspection and test services of water meters and other liquid flow measuring instruments. The Laboratory has dominated and (or) participated in the formulation of national type evaluation program and verification regulation of cold water meters, and the “made in Zhejiang” social organization standard of positive-displacement type water meters. It has carried out type evaluation, verification, calibration, entrusted inspection and test projects of water meters for a long time, provided various technical services and guidance, and issued OIML R 49-based entrusted inspection and test reports for Chinese and foreign clients.
The Gas Flow Laboratory of ZJIM is equipped with different types of gas flow standard facilities, such as critical flow venturi nozzles, master meter method, pistons and bell provers, and other highly precise automatic metrological standard facilities, along with domestic leading technological competences and the capability of conducting OIML R 137 type evaluation. It provides a large amount of type evaluation, verification, calibration, entrusted inspection and other technological services for gas meters, gas flow meters and other measuring instruments.