Research on Quantified Calculation of Measurement System

Resolution is one of the key specifications for instruments. Generally, the resolution of digitized instruments dependent on their internal Analog to Digital Converter (ADC); but few related studies are published concern with the resolution of measurement system composed of instrument and sensors. Firstly it's argued that resolution is only related to random errors; in order to improve resolution, the random fluctuations of measured results have to be decreased. Provided with mass experimental data, a formula for quantified calculating the resolution of measurement system is then presented, and 2.35σ is recommended to be an appreciated acceptable resolution. Lastly, more than 90.9% of confidence probability is proved to be achieved by using the formula.