Hello. I am rather new in the ISO topics. We are implementing ISO 9001:2015 at the moment. Can someone please give me an answer do I need the accreditation of the house which calibrated the measuring devices for the ISO 9001, or is this only a part of the IATF 16949? Secondary, if we decide to calibrate the measuring devices by ourselves, what grade of etalons must be used. Must it be etalon of the 0th grade, or does grade 1 apply aswell? Do we in this case need a document for each and every measuring device, or is it enough to state the list of calibrated dates and next calibration date in an table? Thx in advance.