We offer calibration services through our partner Lambda Calibration Services, who are a UK based independent calibration laboratory providing UKAS accredited gauge, meter and instrument calibration services throughout the whole of the UK and Ireland. Lambda have many years of experience spanning all sectors and UKAS accreditations across multiple disciplines. If you select UKAS calibration with your order, the calibration lead time will generally be within 10 working days. If the item is out of stock, please contact us for an accurate lead time.
What is UKAS Calibration?
Calibration, basically involves the comparison of a measuring instrument, the Unit Under Test (UUT) to a Standard of known accuracy. The standard would ideally be more accurate than the UUT and have its own calibration certificate which can be traced back through an unbroken chain of calibrated standards to an appropriate standard held by a National Laboratory. In the UK, this would be the National Physical Laboratory (NPL).
UKAS Calibration is undertaken by a laboratory which has been independently audited and subsequently accredited by UKAS to carry out the work.
What is UKAS?
UKAS (United Kingdom Accreditation Service) is the sole body recognised by HM Government for assessing and accrediting the competence of calibration and testing laboratories.
UKAS Accreditation, ISO/IEC17025 and ISO9001
Laboratories are accredited by UKAS to ISO/IEC 17025: 2005 which is the internationally recognised standard for the competence of calibration and testing laboratories.
Systems, people, training, and technical capabilities are regularly and thoroughly examined and tested by a team of UKAS auditors, each of them specialists in their field.
Accreditation to ISO17025 also means quality management systems meet the principles of ISO9001. This is endorsed by three major international organisations' the International Organisation for Standardisation (ISO), the International Laboratory Accreditation Co-operation (ILAC), and the International Accreditation Forum (IAF).
UKAS Calibration Certificates A UKAS Calibration Certificate should be instantly recognisable by the UKAS Accreditation Symbol depicting the Royal Crown which is printed in the top right hand corner of the front page. An example is shown at the foot of this page. The certificate should detail the measured results of the calibration, both before and after any adjustments if this is appropriate. It should also detail the uncertainty that is associated with the reported results. It is not however, possible to obtain a UKAS calibration certificate for every conceivable piece of measuring equipment. There are instances where for some types of instrument, no laboratory has been accredited. Or maybe a UKAS laboratory has additional capabilities which have not been formally accredited. A 'Traceceable' or 'In-House' or "Class 1" (they're all the same thing) calibration certificate would usually be offered in these circumstances.
Whilst not bearing the UKAS symbol with Royal Crown, this certificate should at the very least detail the measured results of the calibration and the associated uncertainty of measurement. It should also list any standards used to perform the calibration, thereby providing documented traceability to National Standards. Unfortunately many manufacturers 'calibration certificates' supplied with new instruments do not meet any of the above requirements. This makes them no more than 'Certificates of Conformity' rather than true calibration certificates. These would not normally be acceptable to an auditor.