Function and Performance Requirements of Coal True Relative Density Tester:
The fully automatic coal true relative density tester is primarily used to determine the true relative density of coal. This equipment has the following features:
2.1 Fully automated and intelligent operation, avoiding errors caused by manual handling;
2.2 High testing accuracy, solving the problem of sample dissolution in the immersion method, with superior precision significantly better than the liquid pycnometer method;
2.3 The testing process does not alter the physical properties of the sample, and the sample remains intact after testing, allowing it to be used for other tests; *2.4 "Bottom-loading" sample cell installation method, improving the utilization of the test chamber volume and enhancing testing accuracy; 2.5 Automatic restoration to atmospheric pressure after testing to prevent sample splashing; 2.6 Clear and intuitive graphical control interface, allowing all hardware control operations on the interface; *Stability: even in the event of unexpected power outages or disconnections, current data will not be lost, and the experiment can be resumed; *2.8 Valve type: Pneumatic control valve, fundamentally eliminating changes in the reference chamber volume caused by heat from the operation of solenoid valves in similar instruments, eliminating the need for software correction; the instrument requires no preheating upon startup and can be used directly for testing; 2.9 Automatic memory of the last test settings, automatically applying the previous settings; 2.10 The instrument is equipped with chip memory function, achieving zero configuration of hardware parameters by the user; 2.11 Detailed instrument operation log, with timestamps down to the second, providing assurance for the reliable operation and after-sales service of the instrument; 2.12 Comprehensive operational help prompts; 2.13 INTERNET remote control function; *2.14 Instrument accessories: Valves and pressure sensors are fully imported.
3. Main Configuration of the Coal True Relative Density Tester (including but not limited to the following): 3.1 Test main unit: 1 unit; 3.2 Data acquisition and analysis workstation (including data acquisition and processing software): 1 unit; 3.3 Printer: 1 unit; 3.4 Electronic balance: 1 unit; 3.5 Temperature-controlled constant temperature water bath: 2 units; 3.6 Density bottles: 100 units; 3.7 Adjustable temperature electric furnace: 1 unit; 3.8 Standard gas: 1 cylinder; 3.9 Density measurement accessories: 1 set.
4. Main Technical Parameters of the Coal True Relative Density Tester: 4.1 Test main unit: (1) Testing principle: Gas expansion displacement method; (2) Testing accuracy: Better than ±0.04%, repeatability better than ±0.02%, resolution: ≤0.0001g/ml; (3) Testing volume range: 0.01~2000ml; (4) Testing speed: Single station completes the entire testing process in 1-2 minutes; (5) Number of analysis stations: Model 3H-2000TD1: 1 analysis station, testing one sample at a time; (6) Automatic repeat testing: Can automatically perform repeat tests until accuracy is achieved; (7) Applicable scope: No limitation on sample density; can test various solid samples such as powders, granules, blocks, foams, as well as slurry substances and non-volatile liquids; (8) Sample cell volume: Standard configuration includes three sample cells of different sizes (10ml, 50ml, 150ml); (9) Sample cell installation method: Bottom-loading; the sample cell directly serves as the sample testing chamber, offering high utilization of the sample testing chamber volume, thereby improving testing accuracy; the "bottom-loading bayonet" sample cell can meet the needs of large-volume sample loading to enhance testing accuracy. (10) Reference chamber: Each analysis station has one built-in reference chamber and one expansion chamber; the expansion chamber can improve testing accuracy for different sample cell volumes; the program automatically selects whether to enable the expansion chamber based on the sample cell volume; (11) Pressure equilibrium time: Three modes of pressure equilibrium time—automatic default, user selection, and user customization—to accommodate samples with different structural states; (12) Pressure range: 0-1 bar. Users can customize the maximum pressure to reduce errors caused by pressure-induced deformation of the sample; (13) Self-check process: Advanced intelligent self-check process, intelligently determining whether the sample cell is leaking and whether the instrument's air tightness is qualified, solving human operational errors; (14) Instrument dimensions: ≤610×450×550mm; (15) Instrument weight: ≤25kg.
4.2 Data acquisition and analysis workstation (including data acquisition and processing software): Mainstream brand computer, with: CPU of I5 series or above 4-core processor, memory ≥8G, hard drive ≥1T, optical drive: DVDRW, dedicated graphics card (video memory ≥G), 19-inch widescreen LCD;
4.3 Printer: Laser black and white printer, A4 size, high resolution 1200x1200dpi, with network printing capability and automatic duplex printing function; 4.4 Electronic balance: Maximum capacity: ≥110g, precision ≤0.0001g, pan size: ≥80mm, with four-level shock resistance, automatic calibration system, temperature compensation, built-in calibration weight function, and 232 or 485 interface for communication with the computer; 4.5 Temperature-controlled constant temperature water bath: ≥2 holes, temperature control range from room temperature to 100°C, temperature control accuracy ±0.5°C; 4.6 Density bottle: With ground glass capillary stopper, volume 60ml; 4.7 Adjustable temperature electric furnace: Adjustable temperature in steps, power ≤5kw; 4.8 Standard gas: 40L high-purity helium cylinder, purity ≥99.999%, with factory calibration certificate and equipped with a gas pressure reducing valve; 4.9 Density measurement accessories: 1 set of sieves (1mm square hole sieve, 10mm round hole sieve), 2 thermometers (0-100°C, graduation 0.5°C), 2 net spoons (made of 3mm×3mm mesh), 2 glass plates (300mm×300mm), 2Kg paraffin (melting point 50-60°C), 1 bottle of sodium dodecyl sulfate, 5 large pipettes (10ml, with rubber bulb), 5 small pipettes (1ml, with rubber bulb), 1 reagent bottle (2500ml); 2 glass rods; 2 evaporating dishes; 2 desiccators; 5 bottles of color-changing silica gel.

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