Your calibration spreadsheet won't survive a UKAS audit

CalProof generates an audit pack PDF that contains the equipment register, per-instrument detail with calibration history, certificate references (filename, SHA-256, 7-day signed URL), out-of-tolerance disposition records, an audit-log excerpt, and a method-statement / sign-off page. The pack is generated from your live calibration records — what your assessor sees is exactly what you operate against, with no separate report-only copy that can drift out of date.

No. CalProof does not issue calibration certificates and is not an accredited calibration laboratory. It is the management system around the calibrations your laboratory performs (or commissions): the equipment register, the certificate store, the OOT workflow, the audit log, the report generation. Your scope of accreditation, your CMC, and your validated procedures stay in your own quality system.

Each calibration record has an optional uncertainty field where you record the uncertainty stated on the certificate you received (for example "±0.05% rdg, k=2"). CalProof stores what your provider reported and keeps it with the calibration and its certificate — it does not calculate or propagate an uncertainty budget; your validated budgets and procedures stay in your own quality system. The free measurement-uncertainty calculator on /tools/ lets you compose Type A + Type B contributions in line with JCGM 100 (GUM) and UKAS M3003 as a working aid, not a substitute for that budget.

CalProof keeps every certificate you receive from your accredited providers stored against the instrument it belongs to, with a SHA-256 hash recorded at upload as tamper-evidence of the exact file. Your traceability evidence is those certificates — each names the calibrating laboratory and its accreditation, chaining back to national standards through your supplier (NPL via UKAS, etc.). CalProof keeps them together and auditable; it does not itself assert or compute the traceability chain.

A free public tool that scores any calibration certificate against twelve content requirements drawn from ISO/IEC 17025:2017 §7.8 — eight from §7.8.2.1 (the common report elements), plus the calibration-specific items of §7.8.4.1(a)/(b)/(c)/(d) and the supporting §7.6, §6.3 and §6.5 clauses. Use it during incoming inspection to spot a non-compliant certificate before it lands in your equipment register, or during sub-contractor selection to compare suppliers. See /tools/calibration-certificate-completeness-checker/.