Solutions for the positive and negative errors of universal tensile testing machine

Universal tensile testing machine is an important equipment in material mechanics research, but there are many kinds of test machines, such as plastic tensile testing machine, and different test functions can meet different measurement needs. However, no matter which type of test machine it is, there will definitely be errors in the measurement, so people will finally determine the accurate value after multiple experiments. The universal tensile test machine adopts multiple experiments to avoid the error rate of measuring the value and reduce its error. However, during the measurement process, there will be a positive and negative difference. How to solve the positive and negative difference of universal tensile testing machine during the measurement process? This article will introduce in detail the solutions to the positive and negative error of universal tensile testing machine.

1. When the test machine is checked, when there is positive and negative error in the test machine's display value, the test machine's display value and the corresponding standard force value are generally corrected. However, it should be noted that artificial correction should not be too arbitrary, but should be corrected according to actual conditions.

2. When the display value error is negative, it is linear. First of all, when checking, you should record the actual error values ​​of each calibration point. Then, when calibration is again during measurement, the standard force value of each calibration point is the standard force value minus the actual error value, so you can adjust it. For example: when the standard force value is 200KN, the error is -4.2KN. During calibration, when the monitor is 195.8KN, you need to confirm the key and enter the value.

3. When the display error of the universal tensile test machine is a positive error, it is linear. Using negative error, when calibration, the standard force value of each calibration point changes to the standard force value plus the actual error value, and then input it, and you can adjust it.

4. If the value error, whether it is positive or negative, is not linear, and needs to be calibrated by the above method and then calibrated by conventional methods, you can adjust it.

In fact, as long as the errors in the measurement of the universal tensile test machine are the above types, no matter which one they are, they can be adjusted to finally obtain accurate values. If you encounter any of the above error problems when measuring, you can use this method to solve them. Hope it can help everyone!