The appearance of these errors as their amplitude and their sign are considered
as uncertain. Some of causes can be known but values of errors that they entail
to the moment of the experience are unknown. Various cause possible accidental
errors are indicated hereafter.
2.1 Errors linked to intrinsic vaguenesses of the characteristic instrumental
-Erreur of mobility:
in under a certain value, variations of the @@mesurande not carry of detect
variation of the electrical signal provided by the collector.
-Reading error of a deviation machine: the former results on the one
hand from the most or less great ability of the operator but also, on the
other hand, the quality of the mac
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