Gauss meter accuracy judgment

Gaussmeter/Teslameter is a test measurement instrument for testing the strength of the magnetic field, and its test accuracy is particularly important.

1. Precision

The precision of measurement refers to the degree of agreement (consistency) between the measured values after repeated measurement of the measurand under the same conditions. In terms of measurement error, precision reflects random errors in the measured value. High precision, not necessarily high accuracy (see below). That is to say, the random error of the measured value is small, and the systematic error is not necessarily small.

2. Correctness

    Correctness of measurement refers to how close the measured value is to its "true value". From the perspective of measurement error, correctness reflects the systematic error of the measured value. High accuracy, not necessarily high precision. That is to say, the systematic error of the measured value is small, and the random error is not necessarily small.

3. Accuracy

    The accuracy of measurement, also known as the accuracy of measurement, refers to the degree of consistency between the measured values being measured and the closeness to their "true value", that is, a comprehensive concept of precision and correctness. From the perspective of measurement error, precision (accuracy) is a comprehensive reflection of random errors and systematic errors in the measured value.

     The so-called measurement accuracy or the accuracy of the measuring instrument generally refers to the precision (accuracy), not the precision. That is, in fact "precision" has become a customary shorthand for "precision" (accuracy). As for the claim that precision is the abbreviation of precision, if it is only for precision, it is possible; but if it is considered comprehensively, that is, for the three of precision, correctness and precision, it is not as good as the abbreviation of precision or The meaning is that precision is more appropriate. Because, in practical work, the evaluation of measurement results is multi-system and comprehensive, and only in some specific occasions is the precision and correctness considered separately. So why not simplify (if you say "simplify") a commonly used term and try to simplify a less commonly used term! Besides, as far as most metrology fields and metrology workers are concerned, they are used to "precision" to mean "precision" or accuracy, so why not let it take its course?