Sturtevant Richmont Division of Ryeson

(A2LA Cert. No. 2036.01) 09/12/2025 Page 2 of 2 _________________________________________ 1 Commercial calibration service is sometimes available for this laboratory. 2 Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement that a laboratory can achieve within its scope of accreditation when performing more or less routine calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage factor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory may be greater than the CMC due to the behavior of the customer’s device and to influences from the circumstances of the specific calibration. 3 In the statement of CMC, IV represents the indicated value. 4 In accordance with ILAC Policy 14, Section 4.3, Note 3, the CMC values reported here do not include the contribution to uncertainty of the unit under test. This contribution can increase the uncertainty of measurement substantially and can also vary significantly from tool to tool, type to type and manufacturer to manufacturer. The contribution to measurement uncertainty from the unit under test is reported in calibration certificates for that tool. 5 This scope meets A2LA’s P112 Flexible Scope Policy.