Features of Automatic Static Volumetric Aperture Analyzer
A. Vacuum system of aperture analyzer
1) The original integrated containerized pipeline system uses imported container pipelines, which significantly reduces pipeline connection points, greatly reduces the air leakage rate, and improves the ultimate vacuum.
2) Modular structure design, integrated manifold piping, few parts that need to be manually connected, which is conducive to configuration according to user needs and later function expansion, which is conducive to maintenance and replacement.
3) The Sino-German joint venture vacuum pump is used, with low noise, stable operation, excellent oil-proof return function, high ultimate vacuum, up to 4x10-2Pa (3x10-4Torr)
B. Aperture analyzer control system
1) A programmable controller solenoid valve control system widely used in industrial control systems is adopted, which has strong anti-interference ability, greatly improved stability, and is very convenient for installation and disassembly;
2) The unique design of the separation structure of the test system pipeline and the sample processing pipeline effectively prevents the contamination of the test pipeline caused by impurities generated during the sample processing.
C. Aperture analyzer measures to improve test accuracy
1) Adopt high-precision silicon thin-film pressure sensor of the same brand as similar imported products, and the pressure measurement accuracy is 0.15% of the corresponding reading, which is far better than 0.15% of full-scale accuracy (FS) sensor;
2) Similar to similar foreign products, adopts dual pressure sensors of 0-10 Torr and 0-1000 Torr, and adopts segmented measurement of the pressure within the test range, which greatly reduces the measurement error under low vacuum, and the accuracy of silicon thin film pressure sensors of 0-10 Torr Pirani resistance vacuum gauge much higher than the same range (general error is 10% -15%);
3) The original integrated containerized pipeline system adopts imported container pipelines, which significantly reduces pipeline connection points and greatly reduces dead volume space, which is conducive to reducing measurement errors;
4) The original stepped liquid nitrogen surface control system ensures that the position of the liquid nitrogen surface relative to the sample tube remains unchanged throughout the test, completely eliminating the measurement errors introduced by the change in dead volume;
5) The uniquely designed pumping and intake control system effectively prevents the sample from evacuating and splashing during the intake process, ensures the cleanliness of the test gas path and no loss of sample quality, and protects the high-precision pressure sensor from possible pressure changes. Zero point and linear drift.
D. Aperture analyzer data acquisition and processing
1) Adopt high-precision and high-integration data acquisition module, convenient connection, small error, and anti-interference ability; adopt industry standard 485 communication mode, which is conducive to equipment expansion and interconnection, and can be easily converted to RS232 and USB communication mode;
2) A variety of theoretical calculation model data analysis to provide users with a full range of material analysis solutions; powerful test data archiving and query system, which is conducive to user data management.
E. Applicable scope of aperture analyzer
1) Analysis and determination of specific surface area of ​​ultrafine powder, nano-materials, particles and fibrous materials;
2) Product quality monitoring at the production site of powder material production and application companies;
3) Materials research and testing of universities and research institutes, adsorption science and BET theoretical teaching experiments;
4) Measurement of battery materials, catalysts, additives, adsorbents, ceramic sintered materials, magnetic materials, energy storage materials, etc .;
5) Other research work related to material surface properties.
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