1. Functions and Features

1. Accurate measurement, simple operation, convenient carrying, beautiful appearance;

2. With peak lock, average calculation and undervoltage alarm functions;

3. Able to communicate with computer;

4. Connect with fixed load frame for high-precision and stable measurement;

5. TH220 is a digital Shore A hardness tester, mainly used for plastics, synthetic rubber and other related chemical products;

6. TH220 is equipped with rechargeable battery and has user self-calibration function.

2. Implementation standards

1. "Shore Hardness Tester" Verification Regulation JJG 304-89;

2. "Technical Conditions of Shore A Rubber Pocket Hardness Tester" HG2369-92;

3. "Vulcanized Rubber Shore A Hardness Test Method" GB/T 531-92;

4. American Standard "Standard Test Method for Rubber Property ─ Durometer Hardness" D 2240-91;

5. Japanese standard "Hardness Testing methods for vulcanized rubber" JIS K6253.

Three, technical parameters

1. Model: TH220;

2. Measuring range: 0～100HA;

3. Measurement error: within 20～90HA, error ≤±1HA;

4. Resolution: 0.1HA;

5. Power supply: 3.7V rechargeable battery;

6. Working temperature: 0～40℃;

7. Communication interface standard: RS232;

8. Dimensions: 166×56×42 (mm);

9. Weight: 175g.

The standard configuration

Optional

Fourth, the correct use method

1) Rubber sample and test temperature requirements;
① The rubber sample thickness is not less than 6mm, the width is not less than 15mm, the length is not less than 35mm, and the thickness of the sample is less than 6mm, the same film can be used to overlap the measurement, but not more than 3 layers . And require the film to be parallel up and down.
② The room temperature during verification is 23℃±5℃, and the hardness tester should be stored at this temperature for at least 1 hour before verification.

2) Plastic sample and test temperature requirements;
① The plastic sample is square, with a side length of 50mm and a thickness of 6mm. 50×15mm specimens are also allowed.
②. Where possible, the sample should be adjusted at the laboratory standard temperature according to GB/T2941-1991 before testing. The comparison test or series of tests must be carried out at the same temperature.

3) The surfaces of rubber and plastic samples should be smooth and flat, free of defects such as mechanical damage and impurities.