ISO/IEC 17025 equipment and calibration records help a laboratory demonstrate that resources affecting laboratory activities are suitable, controlled, and supported by reliable technical evidence. The records should follow equipment from selection and acceptance through use, calibration, checks, maintenance, abnormal events, and retirement—without separating the asset list from the validity of reported results.
Place equipment records in the laboratory context
ISO/IEC 17025 addresses the competence, impartiality, and consistent operation of testing and calibration laboratories. Equipment control therefore includes more than scheduled calibration. Facilities, environmental conditions, methods, personnel, externally provided services, metrological traceability, technical records, and assurance of result validity can all interact with the equipment record.
A laboratory is assessed for defined activities. A certificate or accreditation logo alone does not show that every method, range, or service is covered. Review the detailed scope and the actual work requested.
This guide provides an overview for equipment and calibration records. Laboratories should map the complete standard, accreditation-body policies, regulations, methods, and customer contracts to their own system.
Create one authoritative equipment record structure
Unique equipment ID, description, manufacturer, model, serial number, software or firmware where relevant, and location
Measurement range, resolution, accuracy or uncertainty contribution, permitted methods, environmental limits, and intended use
Receipt condition, installation or acceptance checks, authorization, current status, restrictions, and responsible person
Program, interval, method, reference standards, required points, acceptance criteria, and next due date
Intermediate-check plan, maintenance instructions, completed results, adjustments, repairs, and verification after intervention
Calibration results, uncertainty, traceability chain, conditions, provider or performer, review, certificate, and decision
Overload, mishandling, damage, malfunction, out-of-tolerance result, removal from service, impact review, and disposition
Use relationships instead of duplication. The equipment master can link to calibration events, intermediate checks, maintenance work, reference-standard records, environmental logs, methods, and technical reviews while the unique ID keeps the history coherent.
Control the equipment lifecycle from selection to retirement
- 1Specify the technical need
Determine method, range, uncertainty contribution, environmental limits, interfaces, software, and support requirements before purchase.
- 2Receive and accept
Inspect identity and condition, verify documentation, install where needed, and demonstrate that the equipment meets laboratory requirements before release.
- 3Authorize and identify status
Define permitted users or activities, label or administratively identify status, and make restrictions visible.
- 4Operate and preserve
Follow controlled instructions for use, handling, transport, storage, maintenance, adjustments, and environmental conditions.
- 5Calibrate and check
Perform scheduled calibration and appropriate intermediate checks, review results, and update status only after acceptance.
- 6Control abnormal events
Remove questionable equipment from service, assess the effect on previous results, and verify performance before reuse.
- 7Retire without erasing history
Record final disposition, prevent accidental use, preserve relevant records, and update related methods or backup plans.
Connect calibration, metrological traceability, and intermediate checks
Calibration establishes values and associated evidence under stated conditions. Metrological traceability relates a measurement result to an appropriate reference through a documented chain in which calibrations contribute to uncertainty. Intermediate checks provide confidence that performance has not changed between calibrations; they do not automatically replace calibration.
Produces technical evidence against defined requirements at planned or justified intervals
Detects drift, damage, or change between calibrations using predefined method, frequency, limits, and reaction
Preserves or restores condition; may trigger calibration or verification before return to use
Evaluates the reference chain, uncertainty, scope, and evidence needed for the laboratory result
Record actual values for meaningful checks rather than a bare pass/fail when trend analysis is useful. Define who reviews the result, what limit applies, and what happens when a warning or action limit is exceeded.
Protect equipment data, calculations, and technical review
Equipment control increasingly depends on software, spreadsheets, interfaces, automated calculations, and electronic records. Protect raw data and metadata, validate calculations or information-system functions as applicable, manage access, preserve changes, and test backup and restoration.
- Only authorized people can approve equipment, change status, or alter technical control fields.
- Corrections preserve the original entry, reason, date, and responsible person.
- Electronic transfers and calculations are checked or validated for their intended use.
- Calibration certificates and raw or supporting records remain legible and linked to the correct event.
- Backups cover both database records and attachments, and restoration is periodically tested.
- Reviewers can identify the method, equipment, conditions, result, uncertainty, and authorization supporting reported work.
A record system can make controls visible and retrievable. It cannot replace validated methods, competent personnel, technical review, impartiality, or the laboratory’s responsibility for valid results.
ISO/IEC 17025 equipment record assessment checklist
- Equipment affecting laboratory activities is identified and technically suitable.
- Acceptance, authorization, current status, location, and restrictions are controlled.
- Calibration programs and intervals follow technical and applicable policy requirements.
- Reference standards and traceability evidence support the actual measurement result.
- Intermediate checks have defined methods, limits, frequency, records, and reactions.
- Maintenance, adjustment, repair, damage, and return-to-use verification remain traceable.
- Questionable equipment triggers evaluation of previous laboratory results.
- Electronic data, calculations, changes, attachments, backup, and retention are protected.
ISO identifies ISO/IEC 17025:2017 as the international standard for testing and calibration laboratories and notes that the 2017 edition was confirmed in 2023. ILAC explains the role of laboratory accreditation and publishes metrological-traceability policy and guidance through its official site. Always use the authorized standard, accreditation-body policies, and your approved scope.
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