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Automatic Particle Strength Tester / Particle Strength Tester Model: HAD/YHKC-3A I. HAD/YHKC-3A Automatic Particle Strength Tester Overview This instrument adopts the most advanced microcomputer control, with automatic zero adjustment and automatic judgment sample. The pressure value at the time of crushing, the function of automatically calculating the average value of each batch of samples, etc. Small size, high sensitivity, more stable and reliable performance, and more convenient operation. The HAD/YHKC-2A particle strength measuring instrument is a manual pressurizing HAD/YHKC-3A type particle strength measuring instrument for electric pressurization. The instrument is suitable for measuring the crushing strength of ball or garden-like and crumb-like brittle granular materials. Such as the determination of the strength of granular fertilizer, pellet feed, catalyst and the like. Second, HAD/YHKC-3A automatic particle strength tester technical performance Power supply: AC220 volts 20W. Instrument accuracy: 1% Particle diameter: 0.3-15 mm Ambient temperature: 18-23 °C Range ∕ Index: 8N ∕ 0.01N 80N∕0.1N; 150, 240, 300N∕1N (N Newton - can also be expanded according to customer needs.) Dimensions: 200 × 190 × 310mm III, HAD / YHKC-3A automatic particle strength tester principle The pressure signal from the sensor is amplified and then enters the A/D converter to become a digital signal, which is sent to the CPU for analysis and display to provide display printing and control the motor to pressurize or return. 4. HAD/YHKC-3A automatic particle strength measuring instrument operation 1. Plug the power plug into the single-phase three-hole socket with grounding wire, turn on the power switch after the machine is turned on, the indicator light is on, and the digital tube displays: .00 or 0.0 , 00. 2. Place a sample in the center of the sample holder and press the “Start†button. The digital tube displays the sample sequence number 1. The motor starts at the same time, and the pressure head moves downward to pressurize the sample. (HAD/YHKC-2A type particle strength measuring instrument, it is necessary to slowly rotate the handwheel by hand to pressurize, and immediately stop the pressing when the sample is broken.) When the sample is broken, the motor reverses the lifting head and simultaneously The intensity value is displayed in Newtons (N). If the sample is still not crushed when it is pressurized to the maximum range, for example, 80N, the displayed value automatically jumps to zero. The particle test is invalid and is automatically rejected. Use a small brush to remove the sample fragments from the sample holder and the pressure head, and then add another sample. Then press the “Start†button to display the serial number 2 and start the test of the second sample... . By convention, 30 samples were tested for each batch and averaged. After measuring 30 capsules, press the “Start†button again, the motor will not rotate, the serial number 31 will be displayed, and the average value will be displayed later. Then, the serial number and test value and the average value are displayed in sequence. It can be recorded at this time. After the display is finished, press the start button again to repeat the display. If you have ordered a micro printer, you can print the test data of the memory as follows: first press the “Print†button to display 0.0 once, then press P again to start printing the test value and average value at a later time. (It must be measured 30 times before the data can be printed.) V. HAD/YHKC-3A Automatic Particle Strength Analyzer Reset the instrument to continue testing the next batch of samples, you need to reset first. The power can be turned off and on again, or the "Start" button can be pressed once when the instrument sequentially displays the serial number and test value. After reset, the memory data is cleared. Sixth, HAD/YHKC-3A automatic particle strength measuring instrument maintenance and precautions: 1, the instrument should be placed in an environment with little vibration, less dust and less corrosive gas. 2. Turn off the power supply after each test, and clean the adhered materials at the end of the sample plate and the pressure head. 3. Be careful not to let the material fall into the chassis to avoid corrosion. 4. Sometimes the sample is returned automatically after the sample has not been crushed and the test value is small. This may be due to external disturbances or loose heads, or mechanical parts may wear out. To clear the wrong test value, simply press the “Print†button once to display the sequence number just measured, indicating that the value just measured has been cleared. 5. For safety and reduce interference, the grounding end of the power socket should be properly grounded. 7. HAD/YHKC-3A Automatic Particle Strength Tester Special Note: The HAD/YHKC-3A particle strength tester sometimes has a small distance between the press head and the sample holder and needs to be adjusted. The method is: press the start button, and immediately press the sample tray support with the finger after the motor starts, the motor will rotate in the opposite direction to raise the force head for a certain distance. Eight, HAD / YHKC-3A automatic particle strength tester instrument test method: (tested once a year. Standard: Q / HG-88) 1, first remove the two hemispherical cap nut, remove the entire transmission components Put it flat. 2. Turn on the power and warm up for 15 minutes. 3, in order to eliminate zero drift, turn off the power and then turn it on. 4. Add 5 standard weights to the sample plate (refer to the table below for the amount of twisted code) to see the indication error. If the accuracy range is exceeded, correction is required. Remove the two screws on the panel and the two screws on the left and right sides to remove the two connecting blocks and panels. To remove the panel, push the panel down or up to the bottom of the slot to remove it. Use a small screwdriver to slightly adjust the blue potentiometer, the indicator value will change, the zero point of the instrument will also change after adjustment. You need to remove the weight and repeat the third step to return the instrument to zero, then add the weight. Adjust the potentiometer so that it is adjusted repeatedly until it is satisfactory. 5. The relationship between the amount of the twisted code and the corresponding indication value (the corresponding range is 8, 80, 240N): the amount of the twisted code (g) 102 204.1 306.1 408.2 510.2 612.2 714.3 816.4 Corresponding indication value (N) 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 Coronation amount (g) 1020 2041 3061 4082 5102 6122 714 3 8164 Corresponding indication value (N) 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 Coronation amount (g) 3061 6122 9184 12245 15306 18367 21429 24490 Correspondence Indication (N) 30 60 90 120 150 180 210 240 Remarks 1N = 102.04081 g Supplementary instructions; for individual samples with poor brittleness, sometimes the sample has been crushed and the press head will continue to drop for pressurization. You can immediately press the "Print" button once. The pressurizing head immediately stops the pressurization and returns upwards, and at the same time shows the force at the time of crushing, which avoids the invalid test which is always pressed to the maximum value and jumps back to zero. However, it should be noted that when another sample has been added, the press head continues to return upwards. Pressing the “Start†button at this time will immediately pressurize the sample downwards, which saves the idle travel time. When the speed of pressurization becomes diffuse or even stops midway. Please check if the power supply voltage is too low.