OGP Services, a Division of Quality Vision Services

(A2LA Cert. No. 1864.01) Revised 4/3/2025 Page 3 of 3 Parameter/Equipment Range CMC2 (±) Comments Precision Reticles Up to 24 in 30 µin Grid inspection system/SIP measuring instrument Z-Axis Step Gages – Video Step Height Perpendicularity (0.125 to 6) in 28 µin 36 µin Laseruler/indi-square/ indicator Calibration Spheres Diameter (0.25 to 1.0) in 28 µin Laseruler Step Gages – Cobra (0.125 to 1.0) in 12 µin Laseruler QVS Width Gage Up to 60 mm 0.36 μm QVI Quest 625 ________________________________ 1 This laboratory offers commercial and field calibration services. 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 Field calibration service is available for this calibration. Please note the actual measurement uncertainties achievable on a customer's site can normally be expected to be larger than the CMC found on the A2LA Scope. Allowance must be made for aspects such as the environment at the place of calibration and for other possible adverse effects such as those caused by transportation of the calibration equipment. The usual allowance for the actual uncertainty introduced by the item being calibrated, (e.g., resolution) must also be considered and this, on its own, could result in the actual measurement uncertainty achievable on a customer’s site being larger than the CMC. 4 Q[a, b] = √(a2 + b2 ) 5 For certain types of linescales with lengths over 314 mm, the CMC claim is smaller than that of the expanded uncertainty claim for NIST as listed in the BIPM Key Comparison Database. A2LA has evaluated the laboratory’s CMC claim and has verified this information to be correct and appropriate. 6 This scope meets A2LA’s P112 Flexible Scope Policy.