Detailed explanation of the resolution of the material test machine part at that time

When not dividedA/DThe resolution of the converter andMaterial testing machineThe resolution in the standard (which can be understood as the ability to distinguish small values, not the resolution of single finger force values, and is also called resolution for displacement and deformation) generally does not match.
At present, a pseudo-concept is being hyped up in the domestic test machine market. Some people say: "The resolution of the test machine can reach 200,000 digits, 300,000 digits or even higher without ratings." In fact, this is a saying of changing the concept. This is to regard the resolution of the A/D converter as the resolution of the test machine. There is no "resolution" name in the test machine, but some are the terms "resolution". When using low A/D, the resolution of A/D isTesting machineThe resolution defined in the following matches, but the two are not consistent in high A/D. A 24-bit A/D converter has a resolution of ±223=8388608 codes. If the 2.5V full scale is used to divide the voltage of each equal segment is 2.5/(223)=0.298μV. But in reality, the magnitude of various noise voltages is basically in the range of several μV to tens of μV. In addition, the offset and drift of sensors, electronic components, etc. are also within this range. Generally speaking, a 24-bit A/D converter cannot truly distinguish the valid signal of 1/8388608. However, in some special cases, such as measuring very slowly changing signals, a multi-stage low-pass filter with a very low filter cutoff frequency can be used to fully filter out the noise signal and reduce the conversion speed to very low. However, the test machine cannot operate in this state. After years of experimentation, the author has generally found that the effective resolution without grading is difficult to exceed 200,000 yards in a conventional state.

Conclusion: Based on the above comparison and analysis, rating and not rating have their own characteristics. We cannot generalize who is good or bad. It depends on the use environment and usage method, and to play to your strengths and avoid your weaknesses.