Trying to interpret how to make uncertainty calculations for measurements using other measurement equipment, all with various uncertainties...
define: ( * ) ^ 2 as * squared. So that, Utotal ^ 2 = Urated ^ 2 + Ureading ^ 2 + Uresolution^2 Basically, the total uncertainty is a function of the rated, reading, and resolution uncertainties of the measuring device applied to the DUT. The reading uncertainty can be calculated by taking several measurements and calculating their standard deviation. The resolution uncertainty is a measure of how well on can read some constant value. The rated deviation can usually be found in the user's manual for most measurement equipment. All deviations typically vary over the range of values (i.e.. frequencies). A2LA 2000 has a paper that discusses uncertainty calculations titled, 'Approach, considerations, recommendations, and requirements determination... In support of electrical testing assessments involving uncertainty of measurement'. Their 'basic uncertainty calculations' appear to be wrong (see eqn.. 1 & 2). Eqn.. 2 should have a summation of all samples (denoted by subscript k) before dividing. Stuart Lopata
