©Fluke Calibration 2011 Basics Of Measurement Uncertainty for DMM Calibration 30
• Type A uncertainty is determined by the statistical
analysis of a series of observations (measurements).
• Type A uncertainties includes effects from:
− Variations of multiple repeated readings from the UUT
− Effects of the system noise
− Noise and short term variation of the standard
• Now let’s examine the basic statistics …
The “A” portion…