Name	Notation	Description	Types	Status
Class 1	class1	Exposure of instrument allows reference level measurements	Concept	stable
Class 2	class2	Exposure of instrument has small or infrequence influence on ...	Concept	stable
Class 3	class3	Exposure of instrument leads to increased uncertainty or occa...	Concept	stable
Class 4	class4	Exposure of instrument leads to high uncertainty or regular i...	Concept	stable
Class 5	class5	Exposure of instrument leads to invalid measurements	Concept	stable
inapplicable	inapplicable	None of the codes in the table are applicable in the context ...	Concept	stable
unknown	unknown	Classification unknown	Concept	stable