National standards for low-temperature thermostats and low-temperature thermostatic circulation devices were issued and implemented
GB / T26808-2011 "Constant temperature bath and constant temperature circulation device-low temperature thermostatic bath" and GB / T26809-2011 "Constant temperature bath and constant temperature circulation device-low temperature thermostatic circulation device" drafted by the company, passed SAC / TC526 national laboratory instruments With the equipment standardization technical committee (CMIF / TC16 Mechanical Industry Laboratory Instruments and Equipment Standardization Technical Committee) climate and environmental equipment national standards drafting team, all experts have solicited opinions and repeated discussions for nearly four years, and approved the release on July 29, 2011 , Implemented from December 1, 2011.
The national standards related to the constant temperature bath are GB11240-89 "Electric Heating Constant Temperature Water Bath", GB11241-89 "Constant Temperature Bath" and the machinery industry standard JB / T5377-91 "Technical Conditions for Constant Temperature Bath" and JB / T5376-1991 "Low Temperature Constant Temperature Bath "Technical conditions", the circulation device does not have any national standards and industry standards. Since the existing standards were approved for publication in the late 1980s and early 1990s, whether they are technical requirements, test methods, or sampling and determination rules, especially safety requirements, signs, and documents, the standard level has been severely separated from national economic development and foreign trade. The requirements of the standard. The two standards approved and released this time are proposed in this technical and economic context.
The drafting of the cryostat and cryostat circulation device refers to the machinery industry standard JB / T5376-1991 "Crystal thermostat technical conditions", the international advanced German standard DIN12876 "Laboratory thermostat and circulation device" series of applicable parts and GB4793 .1 (IEC61010-1) "Safety of Measurement, Control and Laboratory Equipment, Part 1 General Requirements" and GB4793.6 (IEC61010-2-010) "Safety of Measurement, Control and Laboratory Equipment, Part 6 Materials "Special safety requirements for laboratory equipment for heating" conventional safety requirements and test methods. Especially in combination with the characteristics of the low-temperature constant temperature bath and the low-temperature constant temperature circulation device, which are complex and diverse, only the characteristics are listed for all technical performance requirements, and the characteristic values ​​are stipulated by the manufacturer according to the product characteristics, and are achieved through a unified test method. The purpose of standardization. While fully embodying the scientific and advanced nature of the standard, we should fully consider the actual situation and development level of product design, development and manufacturing in China's manufacturing industry at this stage to make it operable.
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