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Calibration · Glossary

What is a Calibration Interval?

time between calibrationsCalibration

A calibration interval is the time between scheduled calibrations, set so the instrument is likely to stay within tolerance until the next one.

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Calibration Interval Explained

Start with maker advice, criticality and conditions, then adjust using as found history: extend after repeated passes, shorten after failures.

ILAC G24 (OIML D10) describes methods such as staircase and control charts.

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Calculators for Calibration Interval

CalculatorCalibration Interval CalculatorFree online calculator with formula and worked example.CalculatorCalibration Error CalculatorFree online calculator with formula and worked example.

Free Downloads

Free downloadCalibration Master List Format in Excel with Due Date TrackerFree download in Excel and PDF.Free downloadInstrument Preventive Maintenance Schedule FormatFree download in Excel and PDF.

Frequently Asked Questions

What is a Calibration Interval?

A calibration interval is the time between scheduled calibrations, set so the instrument is likely to stay within tolerance until the next one.

Is a fixed yearly interval wrong?

Not wrong, but data based intervals save work on stable instruments and catch unstable ones sooner.

Does ISO 9001 set intervals?

No, it requires them to be specified and justified, not a particular length.

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Related Terms

Calibration termAs Found and As LeftAs found and as left are the calibration readings taken before any adjustment (as found) and after…Calibration termDriftDrift is a slow change in an instrument reading over time when the input stays the same.Calibration termTraceabilityTraceability links a measurement result to national standards through an unbroken chain of calibrations,…

More Calibration Terms

Calibration termCalibration CurveA calibration curve is a fitted relationship between instrument reading and true value, used to correct…Calibration termCalibration CorrectionA calibration correction is the value added to an instrument reading to obtain the corrected value; it is…Calibration termCalibration CertificateA calibration certificate is a formal document reporting calibration results, the reference used,…Calibration termISO/IEC 17025ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories.Calibration termCalibrationCalibration is the comparison of an instrument reading with a known reference standard, recording the…Calibration termAccuracyAccuracy is how close a measurement is to the true value; in specifications it is the maximum expected error.

All calibration terms · Full glossary A to Z

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