Introduction: LX-F type sponge durometer is suitable for the determination of soft foam, polyurethane foam rubber products hardness. it will be different with the other hardness tester In the aspects of using. When using, the presser foot directly contact to the sample, and see its own weight as force measurement load. Specification: 1. Scope of pressure needle route: 0 ~ 2.5millimeters. 2. The scale value: 0-100 degrees. 3. The force of pressure needle end: 550mN~4300mN(56~438.5g). 4. Weight: 0.19kg. The Method of Using: 1. Handheld the middle of the instrument, located the hardness tester gently on the plane specimens which is bigger than presser foot (or specimen). 2. Reading out the value in 1 seconds when durometers’ presser foot contact with the sample smoothly. 3. The tick of pointers is the hardness value of sample (specimen). 4. In order to improving the accuracy of measurement, you should put the sample on a flat plate glass or plate. 5. Each measuring point should be measured only one time, the measuring point at a distance of more than 25mm of different parts from the same sample. should be more than 5 points. 6. To take the average of measurement results, namely it’s the hardness value of the materials
Notes: When the hardness tester presser foot is in free state, the pointer is displayed as "0", and the end face of the presser needle is in close contact with the presser foot plane on the glass plate, and the pointer shall be displayed as "100".If the hardness tester pointer cannot show "0" and "100" at the time of inspection, it can only be used when it needs to be adjusted to "0" and "100".
Sample and adjustment: 1. The thickness of the sample shall be between 25mm and 30mm: when the thickness is less than 25mm, two pieces can be used to be overlapped, but the contact surface shall be smooth and even, and the total thickness shall still conform to the thickness specification of the sample. 2. The size of the sample shall be larger than 100mm, the distance between the measuring point and the sample edge shall be no less than 40mm, the distance between each measuring point shall be no less than 25mm, and each measuring point shall be no less than 5. 3. Remove the epidermis on both sides of the sample, the thickness should be uniform and consistent, the surface should be flat, and the micropore distribution should be uniform, with no mechanical damage or impurities. 4. Sample adjustment and test environment conditions shall be implemented in accordance with GB/ t2941-91. After the hardness tester is used, put it into the instrument box and put it in a dry place to prevent dampness.
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