reference operating conditionmeasuring instrumentmeasuring systembasic termsreference condition <div class="ui-collapsible-content ui-body-inherit" aria-hidden="false"> <p class="NoteEx">Note 1 Reference operating conditions specify intervals of values of the measurand and of the <span class="AnchorInNote"><a class="ui-link" href="http://viml.oiml.info/en/0.07.html">influence quantities</a></span>.</p> <p class="NoteEx">Note 2 In IEC 60050-300, item 311-06-02, the term “reference condition” refers to an operating condition under which the specified instrumental measurement uncertainty is the smallest possible.</p> <p class="Reference">[OIML V2-200:2012, 4.11]</p> </div>