Technical parameters of true density analyzer - Database & Sql Blog Articles

A new generation of 3H-2000TD series real density analyzers from Bestech can accurately measure the true density of various materials. It has a number of technical patents and original test methods, which makes its application field wider than similar instruments and accurate measurement results. The degree is higher and the analytical material has a wider volume range. The instrument is widely used in many research institutes and enterprises including China Aerospace Science and Technology Fourth Hospital, Shenyang Coal Science Institute, Huahai Group, Dow Chemical, etc., and has been well received by customers. Test content: true density, porosity, open porosity, closed cell ratio and other true density analyzer technical parameters: Test accuracy: accuracy is better than ± 0.04%, repeatability is better than ± 0.02%, resolution: 0.0001g / ml Test speed: 0.5-1min for a single station to complete the entire test process. Double station analysis efficiency doubled; Analysis station: 3H-2000TD1 type: 1 analysis station, test one sample at the same time; Scope of application: sample density is not limited, can measure various powder, granular, block, foam Solid sample such as slurry, non-volatile liquid, etc.; test volume range: 0.01~2000ml; sample cell: sample cell with three different sizes (10ml, 20ml, 50ml); sample cell volume It can be selected from 5 to 500ml, and it is suitable for measuring samples with different sizes ranging from 0.01 to 2000ml. A large volume of sample cell with a volume greater than 150 ml is available; pressure range: 0-1 bar. The user can customize the maximum pressure to reduce the error caused by the deformation of the analytical sample. Test gas: 40 high purity helium, purity ≥99.999%; other gases such as nitrogen are optional; Instrument accessories: valve and pressure sensor Imported; Reality Density Analyzer Features Advantages Sample Cell Installation: The sample cell is directly used as a sample test chamber. Compared with similar instruments, it has the advantage of high sample chamber volume utilization, thus improving test accuracy; "Bottom mount bayonet type" The sample cell can meet the needs of large-volume loading to achieve the purpose of improving test accuracy. (Patent name: Sample cell bottom mounted true density analyzer patent No. 5.) Valve type: Air control valve, completely eliminates the change of the reference cavity volume caused by the heat generated by the solenoid valve structure of the same instrument, without software Correction; (patent name: gas control valve true density analyzer patent number. 8); reference cavity: each analysis station has a built-in 1 reference cavity, 1 expansion cavity; expansion cavity can be tested for different sample cell volume Accuracy; the program automatically selects whether to enable the expansion cavity according to the sample cell volume; automatic repeat: can automatically repeat the test until the specified accuracy is reached; Pressure balance: pressure balance time with automatic default, user selection and user-defined three modes, adapt Samples without structural status; Self-test process: Advanced intelligent self-test process, intelligently judge whether the sample cell is leaking or the instrument is airtight, and completely solve the human error; Restore normal pressure: automatically return to normal pressure after test Function to prevent sample splash; Control interface: clear image graphical control interface, and All hardware control operations are performed on the interface; Power-off protection: superior stability, even if the power is cut off or disconnected unexpectedly, the current data will not be lost, and the experiment can resume. The memory function: the instrument configures the chip memory function. To realize the zero configuration of the hardware parameters of the instrument manually; Run log: detailed instrument operation log, the time is accurate to the second, the log provides guarantee for the reliable operation and after-sale of the instrument; Live voice: real voice prompt for each test procedure; multi-language package : Support multi-language operation interface for custom editing. Remote control: with network remote control function; real density analyzer pre-sales and after-sales service: Established a vigorous service team on the service, there are 10 full-time service engineers to provide users with installation and commissioning training services. In order to improve service timeliness and shorten service radius, Bethes Instruments has offices in Shanghai and Guangzhou, and 90% of users can reach the instrument use site within 24 hours. In addition, the company implements a free disclaimer warranty system during the warranty period, a free upgrade system for surface and aperture analyzer software, a regular return visit system, etc., eliminating the worries of users. Real Density Analyzer Instrument Principle: Apply the Archimedes principle-gas expansion displacement method, using the inert gas of small molecular diameter under certain conditions of Bohr's law (PV=nRT), by measuring the sample into the sample cavity The resulting decrease in the gas volume of the sample chamber is used to accurately determine the skeleton volume of the sample (including closed cells) to obtain its true density, true density = mass / skeleton volume. The gas expansion displacement method is a volume in which a sample is discharged by measuring a liquid by a gas. This method eliminates the possibility that the immersion method dissolves the sample and has the advantage of not damaging the sample. Because the gas can be incorporated into the tiny pores in the sample and the irregular vacancies on the surface, the measured sample volume is closer to the skeleton volume of the sample, which can be used to calculate the density of the sample, and the test value is closer to the true density of the sample. The test system of the instrument consists of a sample test chamber and a reference chamber, as shown in the figure. When measuring the sample density, the instrument automatically collects and records the pressure P1 and the volume V1 of the reference cavity; puts a sample V of a certain unknown volume into the sample test cavity of the known volume V2, injects a certain amount of gas into the reference cavity and records the stability after recording. Pressure P2; connect the sample test chamber to the reference chamber and record the stabilized pressure P3. According to the equilibrium stabilized pressure value and the relevant known volume V1, V2, the sample volume V sample to be tested can be calculated, and then The true density of the sample is calculated from the mass and volume of the sample. The 3H-2000TD series real density analyzer adopts the most advanced air control valve control structure (patent acceptance number.8) in the industry, which fundamentally eliminates the volumetric quantification caused by the electromagnetic valve heating caused by the solenoid valve of the same kind of instrument. The problem of error. The 3H-2000TD series of true density analyzers have an advanced "bottom mount bayonet" sample cell installation method (patent acceptance number. 5), and the sample cell is directly used as a sample test chamber, which has a high utilization rate of the sample test chamber. Advantages; for a 10ml sample cell, the test chamber volume utilization is higher than 90%; thus the accuracy of testing for a small number of samples is improved; while the usual sample cell is "top-loaded", the sample cell is loaded into the test bucket. After the cover is sealed, the test chamber consists of “test bucket + sample cell”. There is a large amount of unused space in the test chamber, which makes the test chamber volume utilization low. For the 10 ml sample cell, the test chamber volume utilization is less than 10%; It is difficult to guarantee the accuracy of testing for a small number of samples. On the other hand, the volume of the “top-loading and capping” sample cell is limited by the volume of the covered test drum, and it is not suitable for large-volume loading (it is difficult to meet the loading of more than 150ml volume), and the “bottom mount type” The sample cell can meet the needs of large-volume loading, and the upper limit of loading can reach more than 500ml, so as to broaden the test range, expand the applicable surface, and improve the test accuracy.