Getting Started with Digital Multimeter Resolution
The voltage value corresponding to the last digit of the lowest voltage range of a digital multimeter is called resolution, which reflects the sensitivity of the instrument. The resolution of digital instruments increases with the number of displayed digits. The maximum resolution index that can be achieved by a digital multimeter with different digits is different.
The resolution indicator of a digital multimeter can also be displayed using resolution. Resolution refers to the percentage of the minimum number (excluding zero) and maximum number that an instrument can display.
It should be pointed out that resolution and accuracy belong to two different concepts. The former represents the "sensitivity" of the instrument, that is, the ability to "identify" small voltages; The latter reflects the "accuracy" of the measurement, that is, the degree of consistency between the measurement results and the true values. There is no necessary connection between the two, so they cannot be confused, and resolution (or resolution) should not be mistaken for accuracy, which depends on the comprehensive error and quantization error of the internal A/D converter and functional converter of the instrument. From a measurement perspective, resolution is the "virtual" indicator (independent of measurement error), while accuracy is the "real" indicator (which determines the size of measurement error). Therefore, it is not feasible to increase the number of display bits arbitrarily to improve the resolution of the instrument.
