Calibration Register

Educational guidance on registers and logs — what each records, who maintains it, what it typically contains and how long it is generally kept. Informational only — template examples, not official documents or legal advice; a register documents activity, it does not by itself prove compliance, and employers remain responsible.

What a calibration register is

A calibration register is a controlled list of instruments and measuring equipment that must be calibrated to a known standard, with a record of each calibration and the next due date. It helps ensure that readings used in the business can be relied upon.

This page is an educational overview with a simplified example of what such a register usually contains. It is not an official template, not jurisdiction-specific and not legal advice — the employer decides what their calibration records must cover.

Purpose

• List the measuring and test instruments that need calibrating.
• Record each calibration: date, result, certificate reference and who did it.
• Show what is in calibration and what is due or overdue.
• Support confidence in measurements used for quality or safety decisions.

Who completes it

• A quality or calibration coordinator usually keeps the register.
• Calibration itself is often done by a competent person or an external calibration provider.
• Certificate references are recorded against each item.
• It is the employer’s responsibility to decide how calibration is managed.

When it is used

• When a new instrument is added that needs calibrating.
• Each time a calibration is carried out or a certificate is received.
• When an instrument is found out of calibration or damaged.
• On a review cycle to confirm nothing is overdue.

Typical fields

• Instrument ID, description and location or user.
• Calibration interval and last calibration date.
• Result, certificate reference and next due date.
• Calibration provider or competent person.
• Status: in calibration, due, or quarantined.
• These are example fields only — adapt them to your instruments and the applicable law.

Common mistakes

• Continuing to use an instrument that is overdue or out of calibration.
• Recording a calibration without linking the certificate.
• Not flagging readings taken with an instrument later found out of calibration.
• Letting the register drift out of step with the instruments actually in use.

Document workflow

A calibration register works alongside the asset register that lists the instruments and the maintenance log that records any repair. An out-of-calibration result should quarantine the instrument and may trigger a review of recent measurements; once recalibrated, the register tracks it back into service.

See the related documents below for what is commonly used before, alongside and after a calibration register.

Retention (high level)

Employers generally keep calibration records and certificates for as long as the instrument is in use and for a period afterwards, in line with their obligations and quality needs. Specific retention periods vary by jurisdiction and sector.

This page does not state a required period — confirm retention with the applicable law and the official authority.

Completing and sharing as a PDF

Calibration registers and certificates are commonly stored and shared as PDFs for audit and traceability. Exporting to PDF supports documentation and version control; it does not make the register official or guarantee compliance.

Employer checklist

• Identify which instruments need calibrating and how often.
• Use a competent person or accredited provider and keep the certificates.
• Quarantine and re-check instruments that are overdue or out of tolerance.
• Keep the register aligned with the asset records.

Worker notes

• Check an instrument is within calibration before relying on its readings.
• Do not use an instrument marked due, overdue or quarantined.
• Report damage or suspected drift so it can be re-checked.

Country considerations

Calibration expectations and accreditation arrangements vary by country and sector, and the official authority differs. This page is high-level and general — it is not a statement of any country’s law and not a guarantee that a register is valid anywhere.

Always confirm the current requirements with the official authority for your country and a qualified professional.

Who is responsible

The employer is responsible for ensuring measuring equipment is fit for its purpose, calibrated where needed and recorded, and for compliance. This page is an educational overview with a template example; it does not determine what your register must contain, does not make a workplace compliant and does not transfer responsibility.