difference in indication for a given measured quantity value, or in quantity values supplied by a material measure, when an influence quantity assumes successively two different quantity values
ANNOTATION (informative) [2 December 2014] Here "measured quantity value" can be replaced by "measured value" and "quantity values" can be replaced by "values" in both instances without ambiguity: "difference in indication for a given measured value, or in values supplied by a material measure, when an influence quantity assumes successively two different values".