Series resonance (also known as variable frequency series resonance withstand voltage device) may inevitably experience some errors during use. So, what are the main sources of frequency errors? Firstly, it is possible that there may be errors between the resistors, capacitors, inductors, and other instruments used in the experiment and their rated values. However, the errors caused by this may not be significant, usually only accounting for a few percent of the possibility, but the difference can even be around plus or minus ten percent. Such errors are considered relatively large.

Then errors may occur when connecting circuits in a series resonance test circuit due to improper operation, resulting in errors such as wire resistance, welding resistance, parasitic capacitance, and parasitic inductance. However, these errors can be said to be very small, usually accounting for a few thousandths of the possible errors.

Of course, when conducting experiments, it is humans who are doing the experiments, and as long as it is a human body, there will be errors. It is only a matter of the size of the error, so the reason for the error may also be that the operator did not follow the order of the experiment during the experiment, or sometimes manual readings are required during the experiment, which may have caused errors during the reading process. But as long as it is not a deliberate failure, the errors caused by it are usually not very large, and these errors can be within the acceptable range of experimental results.

From these situations, although there may be small errors in each step of series resonance, the overall error is still large. Therefore, when conducting each experimental operation, we must try to avoid experimental errors as much as possible. In addition to some unavoidable errors, we must strictly follow the experimental requirements when conducting experiments.