[China Instrument Network Instrument R&D] Recently, the Hebei Provincial Bureau of Quality and Technical Supervision conducted an appraisal of the Hebei Province Quality Supervision Bureau science and technology project “Cement Fineness Negative Pressure Screen Analyzer and Analyzer Calibration Device†undertaken by the Xingtai City Metrology Test.
Experts agreed that the calibration device is portable and easy to calibrate on site, solving the problem of dynamic and static calibration of cement fineness negative pressure screening analyzer system, and the overall technical level is currently at the leading position in China. At the same time, experts also put forward very good suggestions for improving the device's time calibration program.
The cement fineness negative pressure sieve analyzer is a constant airflow generated by the negative pressure source, and the sieve of the test sieve can be sieved within the specified sieve analysis time. The negative pressure of the system is one of the main technical parameters of the cement fineness negative pressure sieve analyzer. The accuracy of the system directly affects the screening of the instrument, which in turn affects the judgment of the cement fineness. The instrument is used in cement production companies and cement quality inspection agencies in the construction industry, and is also widely used in powder fineness testing in other industries.
The cement fineness negative pressure sieve analyzer calibration device is a standard instrument for calibrating the cement fineness negative pressure sieve analyzer. The device is composed of a negative pressure source, a digital pressure gauge and ancillary equipment. During the measurement, the pressure is given by the negative pressure source. The calibration device and the negative pressure gauge of the calibration instrument respectively receive the pressure through their respective pressure sensors and display the indicated values ​​to achieve the calibration of the cement fineness negative pressure screening analyzer. The static pressure analyzer can be used to independently calibrate the negative pressure of the cement fineness sieve analyzer, and the negative pressure calibration of the cement fineness negative pressure sieve analyzer can be carried out online.
The calibration device is embedded in the lifting platform, and the adjustable height of the lifting platform is from 20cm to 90cm. It is equipped with a special three-way connection, and 2 external fishtails can be freely exchanged to realize connection with different tested devices.
The device put forward an overall design plan in April 2014. By December 2016, the experiment was completed and finalized. It took more than two years. During this period, the scientific research personnel of the institute constantly modified, perfected, and finalized the design and spent a lot of effort. The successful passing of the expert committee's appraisal indicates that the research institute's scientific research capabilities and technological upgrading levels have been further improved. In the future, calibration of the cement fineness negative pressure sieve analyzer can be carried out. This will improve the accuracy of cement fineness measurement results. Strict control of product quality is of great significance.
(Original Title: Xingtai City Metrology Test Institute cement fineness negative pressure sieve analyzer calibration device passed the expert appraisal