NPL provides a UKAS accredited service for the calibration of combination angle gauges. Angle gauges are examined for compliance with NPL Specifications of Accuracy MOY/SCMI/18-45. The angles of the gauges are determined by means of a precision indexing device and the NPL small angle generator. Measurements can also made of the flatness, squareness and parallelism of the faces.

Measurement Uncertainties

The uncertainty of measurement for the determination of angles is largely dependent on the quality of flatness of the measuring faces. The requirement for the deviation from flatness of the measuring faces of angle gauges made to comply with the relevant NPL Specification is 0.000 2 mm. For such gauges the best measurement capability expressed as an expanded uncertainty (k=2) is ± 0.3 second of arc.

Contact

Customer Service tel: +44 20 8943 8631
E-mail: dimensional_enquiries@npl.co.uk