Skip to content
CalProof

For Manufacturers

Calibration evidence for ISO 9001 audits and customer audits

CalProof is calibration management for UK manufacturers running an ISO 9001 quality system. Equipment register, automated reminders, certificate-to-instrument linking, out-of-tolerance workflow, and an audit pack you can hand to a certification body or a customer auditor without rebuilding it from spreadsheets.

Start 14-day trialDownload sample audit pack

14-day trial. No card required. Cancel any time.

From £29/mo. 14-day trial · no card required.

Built by Crocker Digital Ltd, a UK-registered company (Co. No. 17008789).

Calibration is a common source of non-conformances at ISO audits

Most UK SMEs still track calibration in spreadsheets. The gaps an auditor opens are usually the same four:

Missed calibrations

Manual reminders get dismissed or missed. Instruments slip past their due date and the auditor finds the gap on a spot-check.

Lost certificates

Paper and PDF certificates scattered across folders. Auditor asks for instrument #247's history and you scramble for thirty minutes.

No out-of-tolerance procedure

Equipment fails calibration. Which products were measured with it? Without a systematic trace, quarantine decisions are guesswork.

Audit-day reassembly

Export the spreadsheet, format it, hope nobody asks about measurement uncertainty. Every surveillance visit is the same scramble.

What CalProof gives you for an ISO 9001 audit

  • Equipment register — every calibrated instrument with ID, type, serial, location, interval, last-cal date, next-due date, status. CSV import from Excel.
  • Automated reminders — emails to the responsible signatory ahead of each due date so the calibration is booked before the auditor arrives.
  • Certificate management — PDF upload linked to the instrument and the calibration event, with SHA-256 of every file as evidence of the upload, surfaced under the instrument detail page.
  • Out-of-tolerance workflow — affected period, disposition decision (use as is / rework / scrap / re-test), recalibration scheduling, all captured against the calibration record.
  • Audit pack PDF — equipment register + per-instrument detail with calibration history + certificate references + OOT records + audit-log excerpt + method-statement / sign-off page. Same template you would hand to a certification-body auditor or a customer auditor.

Frequently asked questions

How does CalProof support an ISO 9001 surveillance audit?
ISO 9001 Clause 7.1.5 ('Monitoring and measuring resources') is one of the more frequently audited clauses for manufacturers. CalProof gives you the four things a certification-body auditor will ask for: a complete equipment register, evidence of specified calibration intervals with documented justification, calibration certificates linked to the instrument and traceable to international standards, and a documented out-of-tolerance procedure. The audit pack PDF stitches these together.
Do customer audits and supplier audits need different evidence?
Often, yes. A certification-body auditor reviews your quality system against ISO 9001:2015 broadly. A customer auditor (especially in regulated sectors like medical-device or aerospace) tends to focus on instruments specific to the parts they buy from you, the as-found data on the most recent calibration, and the disposition records for any out-of-tolerance event affecting their batches. CalProof keeps that evidence together — instrument card, calibration record, linked certificate, OOT disposition, audit-log excerpt — so when a customer auditor asks for the history on a specific instrument, the full chain is one click away rather than scattered across spreadsheets and folders.
Does CalProof issue calibration certificates?
No. CalProof is the management system around the certificates your accredited calibration provider issues. We do not perform calibrations and we are not a UKAS-accredited laboratory. The product stores certificates, links them to the instrument and the calibration event, computes a SHA-256 of each upload as evidence of the file we received, and surfaces them in the audit pack.
What does CalProof do that Excel does not?
Automated email reminders ahead of due dates (Excel cannot do this reliably). A direct link from each certificate to the instrument and the calibration record (Excel keeps these in separate files). A documented OOT workflow — affected period, disposition decision, recalibration scheduling — captured against the calibration record (Excel needs a separate procedure document). An immutable audit log of write actions retained for seven years (Excel files are mutable and version control is informal). And an audit pack PDF generated on demand instead of assembled the night before.
Can the equipment register be searched and filtered for an audit?
Each instrument carries a free-form 'location' field you can use to encode site, building, production line, or department, plus the standard instrument fields (type, manufacturer, serial, due date, state). The register supports search across those fields. The audit pack PDF exports the whole-org evidence set — equipment register, calibration history, linked certificates, OOT records, audit-log excerpt — which is what an ISO 9001 surveillance auditor or customer auditor expects to receive for the management-system review.

Ready for your next surveillance visit?

14-day trial. No card required. Import your equipment register from CSV and have the audit pack generated by lunchtime.

Start 14-day trialSee pricing

14-day trial. No card required. Cancel any time.

Run a calibration laboratory holding ISO/IEC 17025 / UKAS accreditation? See CalProof for calibration labs.