Choosing a calibration laboratory checklist
What to verify on the scope, what to agree in the order, and what to check when the certificate comes back.
14 items · Based on ISO/IEC 17025:2017, ILAC-P10, ILAC-P14
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Accreditation and scope
Agree before ordering
On receipt
General technical guidance written against the cited sources. Adapt it to your procedures; it is not a substitute for the applicable standard or a qualified reviewer's judgement.
Background reading
How to choose a calibration laboratory
Check the accreditation scope for the quantity, range and uncertainty you need, then weigh turnaround, certificate quality and out-of-tolerance handling.
How to read a scope of accreditation
A scope lists, per quantity, the range, the calibration and measurement capability and the method — so it says what a laboratory can certify, and how well.
Questions to ask before sending equipment for calibration
Points, tolerance, decision rule, as-found reporting, adjustment policy, turnaround, packaging. Settle them up front and the certificate will be usable.