How to calibrate the horizontal tensile testing machine?

The calibration of the horizontal tensile testing machine usually includes the following steps: 1. Cleaning and appearance inspection: First, clean the surface of the testing machine to ensure that no dust, oil or other impurities affect the test results. At the same time, check the appearance of the testing machine to make sure that there is no damage or abnormality. 2. Zero calibration: Before testing, you need to check the zero point of the testing machine. By rotating the lifting handwheel, make the fixture above the testing machine at the starting point of the test stroke, and record the reading of the testing machine at this time. 3. Standard weight calibration: Use a standard weight of known weight and place it on the fixture according to the test journey. Record the reading of the testing machine at this time and compare it with the actual weight of the standard weight. If the error exceeds the specified range of the testing machine, it needs to be corrected by adjusting the sensitivity of the testing machine.4. Repeatability test: use standard weights for repeatability testing. At different positions of the test stroke, record the readings of the test machine many times and calculate its error range. If the error is within the allowable range, it means that the repeatability of the testing machine is good. 5. Partial load test: place samples of different weights on the fixture, record the readings of the testing machine, and calculate the error range. If the error is within the allowable range, it means that the bias performance of the testing machine is good. 6. Temperature calibration: For temperature-sensitive materials, temperature calibration is required. Place the testing machine in a constant temperature environment and use a thermometer to measure the temperature inside the testing machine. If the temperature error exceeds the allowable range, it needs to be corrected by adjusting the temperature sensor of the test machine. When calibrating the horizontal tensile testing machine, the following principles need to be followed:1. Make sure that the testing machine is in normal operation and there is no malfunction or damage. 2. Full preparation should be made before calibration, including cleaning the testing machine, preparing standard weights and test samples. 3. During the calibration process, you should follow the prescribed steps to avoid incorrect operation leading to calibration failure or damage to the testing machine. 4. After calibration, the performance of the testing machine should be checked to ensure that it meets the relevant standard requirements. 5. Regular calibration is carried out to ensure the accuracy and reliability of the testing machine. The above is an introduction to the general steps and precautions for the calibration of horizontal tensile testing machine. In the actual operation process, corresponding adjustments and supplements should be made according to the model and usage of the specific testing machine.