http://digilab.ptb.de/vocab/http://digilab.ptb.de/vocab/skos/23773fault http://digilab.ptb.de/vocab/skos/23773 fault limit RT http://digilab.ptb.de/vocab/skos/23773 measuring instrument RT http://digilab.ptb.de/vocab/skos/23773 error of indication RT http://digilab.ptb.de/vocab/skos/23773 intrinsic error RT http://digilab.ptb.de/vocab/skos/23773 influence factor RT http://digilab.ptb.de/vocab/skos/23773 significant fault RT http://digilab.ptb.de/vocab/skos/23773 Construction and operation of measuring instruments BT