157. UNCERTAINTY BUDGET EVALUATION PRINCIPLE IN HIGH AND LOW RESOLUTION DIGITAL MULTIMETERS CALIBRATIONS47
Keywords: uncertainty component, influential factor, distribution, reference standard, unit under test
The main purpose of this paper is definition and mathematical representation of all influencing factors, which can be regarded as uncertainty components in a calibration of both high and low resolutions digital multime- ters. The mathematical procedure, which is theoretically proposed is further clarified with a case-study encompassing 2 measurement devices: 61⁄2 digital and 43⁄4 digital multimeters. In the case-study, a discussion about the dominant in- fluential factors, regarded as uncertainty components, is provided for both instruments, as well as conclusions about the possibility for neglecting some of them in practical considerations, due to the small impact on the overall budget.