The hydraulic universal testing machine is a common experimental instrument. During the inspection process, the staff generally report that a certain amount of error will occur. What is the cause of the test error of the hydraulic universal testing machine?
1. Environmental humidity changes
The environmental humidity sometimes affects some characteristics of the sample, which makes the experimental results substandard
2. Negligence error: errors caused by errors in the test work, negligence and other reasons. This kind of error is irregular and can be avoided by checking the other party repeatedly.
3. System error of universal testing machine: the error of maintaining a certain value or a certain regular change. The system error of the hydraulic universal testing machine is regular. This law is reflected in every specific test. If this law is found, it can be corrected.
Reasons: 1. The hydraulic universal testing machine is inaccurate, and the measured force is too large or too small;
4. Random error: that is, if the same parameter is repeatedly measured for multiple times under the same conditions, the measured values obtained by the hydraulic universal testing machine cannot be completely the same.
Cause: During the test, the internal friction of the hydraulic universal testing machine changes.
