A missed calibration deadline, an undocumented repair, or an instrument used beyond its acceptable limits can compromise laboratory results and raise questions during an audit.
For laboratories pursuing ISO/IEC 17025 accreditation, equipment must be suitable for its intended use, appropriately maintained, and supported by documented evidence. A Laboratory Information Management System (LIMS) can help organize equipment records, track scheduled activities, and make relevant documentation easier to retrieve.
What ISO/IEC 17025 Requires for Laboratory Equipment
Clause 6.4 of ISO/IEC 17025 addresses equipment suitability, maintenance, and records. Laboratories need to maintain relevant information, including:
- Equipment identification, model, and serial number.
- Calibration and verification results and certificates.
- Maintenance schedules and service history.
- Details of damage, malfunction, or repair.
- Evidence that equipment meets requirements for its intended use.
Where measurement traceability is required, appropriate calibration arrangements must also be established. NIST guidance on metrological traceability explains how documented calibration chains support measurement results.
A LIMS can help manage this information, but compliance still depends on the laboratory’s procedures, personnel, and implementation of the standard.
1. Centralize Equipment Records
When equipment information is scattered across spreadsheets, paper logs, and email threads, checking an instrument’s status becomes unnecessarily difficult.
A LIMS can bring key details into a centralized record, including:
- Equipment ID, type, model, and location.
- Current status and relevant usage information.
- Calibration dates, results, and certificates.
- Maintenance activities, repairs, and follow-up actions.
This gives personnel a clearer view of an instrument’s history without searching through multiple files. For laboratories also tracking reagents and supplies, laboratory inventory management software can help organize inventory information alongside other laboratory resources.
2. Keep Calibration on Schedule
Calibration deadlines are easier to manage when they are tracked systematically rather than left to individual reminders.
Depending on its configuration, a LIMS can help laboratories:
- Record calibration intervals and due dates.
- Flag upcoming or overdue activities.
- Notify responsible personnel.
- Store calibration results and supporting certificates.
For example: A temperature-controlled testing laboratory can use advance reminders to arrange calibration for a reference thermometer before it becomes overdue. This reduces reliance on manual checks and last-minute scheduling.
Calibration intervals should reflect factors such as equipment use, stability, risk, and applicable requirements. Software can track the schedule, but the laboratory must establish and review the interval.
The guide to calibration management covers the procedures and controls that help laboratories maintain reliable calibration practices.
What if calibration results are unacceptable?
A failed calibration requires investigation, not just a status update. The laboratory may need to:
- Remove the instrument from service where necessary.
- Investigate the failure and document the findings.
- Assess whether previous test results may have been affected.
- Record corrective actions and determine what verification is needed before reuse.
A LIMS can help retain the related records and document the response, depending on the workflows available.
3. Plan Maintenance Before Equipment Fails
Calibration evaluates measurement performance against appropriate standards or references. Maintenance helps keep equipment in suitable working condition. Both need defined procedures and records.
| Preventive maintenance | Corrective maintenance |
| Planned inspections and servicing | Repairs after breakdowns or damage |
| Routine cleaning and component replacement | Investigation of equipment failures |
| Activities scheduled at defined intervals | Actions to restore suitable operation |
A LIMS can support maintenance scheduling and documentation by recording service dates, work performed, responsible personnel, and follow-up requirements.
Equipment histories can also reveal operational issues:
- Repeated breakdowns: The instrument may require further investigation or replacement.
- Frequent service visits: The maintenance approach may need review.
- Overdue activities: Scheduling or resource constraints may be causing delays.
- Incomplete service records: Documentation procedures may need improvement.
After significant repairs or adjustments, the laboratory should determine whether verification or recalibration is necessary before returning the equipment to use.
4. Connect Equipment Issues to Test Results
Suppose an instrument fails a calibration check on Monday. The laboratory must determine whether tests performed with that instrument may have been affected.
Where the LIMS supports links between equipment, samples, tests, and results, personnel can more easily identify relevant activities and document their response.
This can help the laboratory:
- Identify potentially affected tests.
- Record investigation findings and decisions.
- Track corrective actions and follow-up verification.
- Document the basis for returning equipment to service.
The level of traceability depends on the system’s capabilities and configuration. Laboratories should confirm that the relationships they need can be recorded and retrieved.
5. Retrieve Equipment Evidence During Audits
An auditor may ask for a calibration certificate, maintenance history, or evidence that an instrument was suitable for use on a particular date.
A well-organized LIMS can help personnel retrieve the relevant documentation without reconstructing the instrument’s history from separate files. Records should remain accurate, protected, accessible to authorized personnel, and retained for the required period.
Equipment documentation also forms part of the laboratory’s wider document-control process. Document and record control in ISO-compliant laboratories explains how controlled procedures and retained evidence support consistent operations.
The objective is straightforward: personnel should be able to establish what happened to an instrument, when it happened, and what evidence supports the decisions made.
6. Use Equipment Data to Improve Operations
Equipment records can reveal more than whether scheduled tasks were completed. Reviewing them can help managers identify:
- Instruments with recurring calibration failures.
- Equipment requiring frequent repairs.
- Maintenance activities that are repeatedly delayed.
- Patterns of downtime or incomplete documentation.
These findings can inform maintenance planning, resource allocation, and equipment replacement decisions. Any changes to calibration intervals or maintenance procedures should be justified and documented according to the laboratory’s quality system.
Reporting capabilities vary, so laboratories should assess whether a LIMS can produce the information needed for these reviews.
Implementing LIMS-Based Equipment Management
A successful implementation starts with consistent processes, not software alone.
- Register equipment: Assign unique identifiers and create a record for each instrument.
- Define calibration requirements: Establish intervals, acceptance criteria, and responsibilities.
- Schedule maintenance: Set activities based on equipment needs and manufacturer recommendations.
- Standardize records: Define what must be documented after calibration, servicing, repairs, and failures.
- Connect relevant data: Link equipment to samples, tests, and results where supported.
- Review performance: Monitor overdue activities, recurring failures, and documentation issues.
Before selecting a system, assess its access controls, audit-trail capabilities, retention options, reporting, and integration requirements.
Supporting ISO Compliance Through Better Equipment Control
A LIMS can help laboratories manage equipment records, coordinate calibration and maintenance, and retrieve supporting evidence more efficiently. QISS LAB provides laboratory information and inventory-management capabilities to support these efforts. However, software alone cannot ensure ISO compliance; laboratories still need competent personnel, appropriate procedures, and an effectively implemented quality system.
Request a free QISS LAB demo to explore how centralized laboratory information can support day-to-day operations.
