Institute of Metrology was a major topic of special scientific instruments

Major national issues of special scientific instruments developed "wide limit the amount of high-precision current measurement instrument", is a Fellow of China Institute of Metrology Zhang Zhonghua responsible, by the China Institute of Metrology, Testing Technology Research Institute of China, Yunnan Province, Measurement and Testing Technology hospital, such as Heilongjiang Institute of Measurement and Testing Technology was jointly declared nine major national special issue, has been subject to open title defense, steady progress is the subject.

At present, the domestic use of high precision instruments, more than 95% are buying foreign products, a lot of money every year to be used to import sophisticated instrumentation. Meanwhile, foreign technology blockade by the restrictions, the domestic first-class research institutions is difficult to buy foreign equipment, resulting in scientific research has been constrained by the device. Development of national key scientific instruments and equipment for the special issue is raised by this negative situation. "Limit the amount of high-precision wide current measurement instrument" project is the use of the project team developed "a very low resistance of the load effect of distributed sampling", a fundamental solution to limit the amount of current wide-precision measurement difficulties, the use of the research into the "very sampling effect of distributed low-load resistance, "with the necessary accessories to develop" ultra-wide limit the amount of precision current measurement instrument "to study" distributed sampling resistor load factor of self-checking method "and uses a wide range of" high-stability constant current power supply ", to replace the corresponding imported equipment.

Yunnan Institute of Metrology in the subject's main task is to use the "low load effect of distributed sampling resistor" to increase the stability of constant-current source products, development of hundreds or even thousands of amperes, the following order of stability up to 10-5 The constant current source device; improve the accuracy of current measurement instrumentation; developed a measurement uncertainty of 10-5 order of magnitude below the current measuring device; developed 80kA and below the transformation range measurement accuracy of the order of 10-5 the following large DC current standard equipment.

Measurement is to promote scientific and technological progress, economic growth, improve the livelihood of the important technical basis. Measuring instrument is one of the major scientific equipment, the project will be implemented to develop a promising measurement equipment products, scientific instruments and equipment to enhance our capability of independent innovation, and enhancing our level of scientific instruments and equipment to equip themselves to enhance scientific and technological innovation quality and level of strong support for economic and social development and livelihood improvement of great significance.