Consider a regulated voltage output that needs to be checked. Three colored DC digital bench voltmeters (DVM) are available: red (DVM-1), green (DVM-2), and blue (DVM-3). Determine which one provides the best measurement uncertainty, i.e., in the reading result , and provide the value of the uncertainty found for that DVM. Assume that all of them provide the same reading .

The accuracy performance for each DVM is summarized below.