AI for calibration laboratories, starting with the certificates you already released.

The document is the deliverable. NIST Handbook 150-2, the October 2024 edition of NVLAP's calibration program handbook, uses the term calibration report and treats calibration certificate as an equally good name for the same thing. That program began taking applications in 1994 and now spans eight fields of calibration. Whatever a lab calls it, the paper that leaves with the instrument is what the customer pays for and keeps.

Field work lands on the same desk. Many NVLAP-accredited labs send a technician from the main lab to calibrate at a customer's site, and that service shows on the scope. Where accredited field work is done by staff based somewhere other than the main facility, the handbook adds requirements, among them that every signatory attends the initial assessment of the main facility. A certificate written in a plant's maintenance shop goes through the same release review as one written at the bench, so a check that catches gaps helps both.

Utilities write your work into their rules. In Texas, an electric utility sends reference standards of every kind once a year, or on a schedule the state's Public Utility Commission approves, to a standardizing laboratory of recognized standing for test and adjustment. Its shop and portable meter test instruments are compared with a reference standard at least every 120 days while in regular use, and each must travel with a certified calibration card, signed by the proper authority and dated. For the reference standards a utility sends you, your certificate's dates are where its own records start.

Plants file your paper in their programs. Federal drug rules have automatic, mechanical and electronic equipment calibrated, inspected or checked under a written program, with written records of those checks kept. When an instrument from such a plant arrives out of tolerance, your notice is one of the papers that program has to answer, which is why the second job matters as much as the first.

Some states register the field side. Michigan's weights and measures program registers the service agencies that place commercial scales and meters into service, remove official rejection tags or return condemned devices to use. Registration, which runs two years at a time, means passing exams on NIST Handbook 44, the state act and each device type, and documenting the certified test standards the agency holds. A lab doing that work keeps one more set of standards papers current.

The label and the certificate must agree. A2LA's rules on references to its accreditation say a calibration label carrying its symbol shows the lab's name, its A2LA certificate number, the equipment's identification and the date of the current calibration, with a cross-reference to the certificate where those don't make the link. In both jobs, nothing is released or sent by the proof of concept, nor does it decide tolerance or compute an uncertainty. It works only on copies, and your signatory or quality manager signs every record. The rules on this page are summarized for context, not as legal or technical advice.