ON THE IN-USE UNCERTAINTY OF AN INSTRUMENT
Work partially funded under EU SofTools_MetroNet Contract N. G6RT-CT-2001-05061.
The in-use uncertainty of an instrument is investigated according to the possible measurement procedures, namely: as a comparator or as a standard. These two alternatives are embedded in a unique model and the uncertainty components due to instrument calibration and noise are discussed. Special attention is given to the case of calibration by fitting with a straight line.