reference: R129:2000 2.28

ID: 01727

a fault greater than one scale interval (d). The following faults are not considered to be significant, even when they exceed the value defined above: (a) faults arising from simultaneous and mutually independent causes in the measuring instrument itself; (b) faults implying the impossibility to perform any measurement; (c) transitory faults being momentary variations in the indication, which cannot be interpreted, memorized or transmitted as a measurement result; and (d) faults giving rise to variations in the measurement result so serious that they are bound to be noticed by all those interested in the result of the measurement.