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1. Before the measurement, check that the pointer of the Shore hardness tester should point to the zero position in the free state. If the pointer deviates from the zero position, you can loosen the upper right corner by pressing screw, turning the surface, and aligning the zero position.
Then press the shore hardness gauge on the glass plate. When the end face of the pressing needle and the bottom surface of the pressing foot are in close contact with the glass plate, the pointer should point to 100+/-0.5HA. If it does not point to 100+/-0.5HA, it can be slightly Press the needle several times, if it still does not point to 100+/-0.5HA, the Shore hardness tester cannot be used.
2. Rubber samples and test temperature requirements;
① The thickness of the rubber sample is not less than 6mm, the width is not less than 15mm, and the length is not less than 35mm. When the thickness of the sample is less than 6mm, the same film can be used for overlapping measurement, but not more than 3 layers. And the film is required to be parallel up and down.
② The room temperature during verification is 23℃±5℃, and the Shore hardness tester should be stored at this temperature for at least 1 hour before verification.
3. The surfaces of rubber and plastic samples should be smooth and flat, and there should be no defects such as mechanical damage and impurities.
4. After the shore durometer tester is used 35,000 times, it is recommended to check the relationship between the spring pressure and the pointer scale and the shape and size of the end of the indenter every 10,000 times or so.
5. After the Shore hardness tester is used, put it in the instrument box or instrument box, and place it in a dry place to prevent moisture.
6. The lifting shaft and the bottom of the worktable on the fixed load measuring frame should be wiped clean frequently, and a small amount of anti-rust oil should be applied to prevent rusting.
7. When using Shore hardness tester, it is inaccurate when the value of the A-type hardness tester is lower than 10HA, and the measurement result cannot be used. It is recommended to use the D-type hardness tester when the measured value of the A-type hardness tester exceeds 90HA.
Namely Type A, Type C and Type D. The difference between them is the size of the measuring needle.
Shore A durometer gauge is used to measure the hardness of soft plastics, rubber, synthetic rubber, felt, leather, printing rollers;
The Shore D durometer is used to measure the hardness of hard plastics and hard rubbers, such as thermoplastics, hard resins, flooring materials, bowling balls, etc. It is especially suitable for on-site hardness measurement of rubber and plastic products.
The Shore C durometer is used to measure soft materials such as foams and sponges.
Mikrometry instruments limited is a designer and manufacturer of altimeters, force and torque measurement products, portable hardness testers, displacement sensors and coating thickness gauges.
Since our founding in 2007, our products have proven themselves in numerous applications for companies in automotive, machinery, electronics, films, medical devices, textiles, pharmaceuticals, cosmetics, packaging, food and many other industries, and we have a We have a technical team with more than 10 years of experience, good technical capabilities, international vision and project management. We also provide targeted and optimized solutions for special requirements.
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