Precision Granite USA

(A2LA Cert. No. 3559.02) 03/22/2024 Page 2 of 2 Parameter/Equipment Range CMC2, 4, 5 (±) Comments Granite Accessories3 – Straightness Perpendicularity Parallelism Length Up to 144 in Up to 144 in Up to 6 in Up to 48 in Up to 168 in Up to 12 in 16 µin 30 µin 120 µin 31 µin 32 µin (53 + 0.20L) µin Autocollimator Autocollimator with penta prism on surface plate L in inches Squarol & Master V block Electronic amplifier on surface plate Autocollimator on surface plate Gage blocks ________________________________ 1 This laboratory offers commercial and field calibration services and new manufactured products. 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 a 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 t he 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 uncertainties achievable on a customer's site can normally be expected to be larger than the CMC that the accredited laboratory has been assigned 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 uncertainty introduced by the item being calibrated, (e.g., resolution) must also be considered and this, on its own, could result in the calibration uncertainty being larger than the CMC. 4 In the statement of CMC, the numerical value L is for nominal length of the device measured in inches. 5 The contributions from the UUT are not included in the CMC claim (e.g., for surface plates, the tolerances are not included). 6 This scope meets A2LA’s P112 Flexible Scope Policy.