How to distinguish between good and bad cardboard compression testers? What aspects should be considered when purchasing cardboard compression instruments? How can the quality of the instrument be determined? Below, Engineer Liu from Yinyue Instrument Co., Ltd. provides a detailed explanation:

Typically, an authorized third-party testing facility with detection capabilities is entrusted to individually inspect the following aspects of the instruments using relevant assessment tools. A comprehensive evaluation is then conducted to determine if they meet national or industry standards. Below, we will discuss the criteria for assessing these equipment.

Instrument Accuracy Testing: Utilize a standard calibration device with accuracy 3-5 times better than the tested instrument to assess its accuracy.

Are all components affecting accuracy within the allowable error range? If not, make appropriate adjustments.

3. Safety Protection: The equipment will automatically shut down if the measured value exceeds the upper limit by 2% to 10%; the equipment should also automatically shut down when the moving parts reach their limit.

4. Operational Performance, System Functionality: Button operation is normal, display is clear and prominent, printed data is accurate, and the testing process is continuous and complete.

5. Appearance: Surface painted parts are flat and smooth with even coloration, free of spots, bubbles, and peeling; blackened parts have even coloration; other parts have no obvious dings, dents, rust, burrs, etc.