Traceable vs UKAS Calibrations

Traceable vs UKAS Calibrations

To set the scene, the term calibrations is strictly a comparison between the reference equipment and the unit under test (UUT). The values and details of both being reported in a calibration certificate.

Important note: Calibration DOES NOT include any kind of adjustment.

All reference equipment used to provide calibration values, is in itself calibrated to ensure a chain of calibration.

Frequent questions on calibration:

‘What is the difference between UKAS and Traceable Calibrations?’

A Traceable Calibration

• Reports the values and differences between the reference equipment and the UUT.

A UKAS Calibration

• Reports the values and differences between the reference equipment and the UUT using configurations of test equipment e.g. temperature cabinets, baths etc that have been evaluated and approved by UKAS.
• The degree of uncertainty of the measurement for these configurations has been determined.
• Values, differences, and uncertainties are noted on the calibration certificate.

‘Which calibration type should I ask for’

• Where the application is not ‘critical’ e.g. a general office situation a traceable calibration may suffice.
• Where the application is ‘critical’ e.g. a drug fridge as part of an MHRA regulated pharmaceutical site a UKAS calibration would be most probably a requirement.
• Guidance should be sought from those that have defined the process and are aware of the regulatory environment of the site.

‘Why do my calibration labels attached to my calibrated products have no ‘Due Date’ specified?’

• The period between calibrations for different products may vary.
• The period should be chosen taking into account the application in which the equipment is being used, and the results from previous calibrations.

For information on calibration, contact us on +44 (0) 1462 688070 or email [email protected].