Good People, I am attempting to reduce instrument calibration cost/time for non-EMC related equipment.
THe proposed process has the calibration contractor perform calibration of a set of 'master instruments' (so are directly traceable to NIST), and other instruments are internally verified using the 'masters'. The proposed process lists a hierarchy of instrument accuracy and precision, and specifies the ranges and scales for each verification of each instrument. Uncertainty is addressed, but GUM is not used. A verification is performed on a subset of the instrument's parameter set. IEC17025 mentions 'vaildated methods' and does not disallow this process; and neither is there anything that specifically recognizes this type of calibration system. My two basic premises are that the measurement uncertainty from a verification is logged at regular intervals, and the process will comply with the requirements list in 5.4.4. I am audited by three agencies and two agree, in principle, with the proposed process. The third does not concur. FWIW, my certificates have a narrow scope - most define of list of Type Tests for several product safety standards. Calibration is distant from my education and experience - so I would appreciate critical thoughts on the use of this as a process internal to a company lab. thanks much, Brian - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
