Vacuum Technology

(A2LA Cert. No. 1707.01) 1/13/2025 Page 2 of 2 Parameter/Equipment Range CMC2, 3, 4 (±) Comments Vacuum Gauges – All Gases 1×10 -3 torr to 3000 psig (1×10 -7 to 1×10-3) torr 2.5 % 5 % VGMS w/ capacitance manometer static comparison VGMS w/ spinning rotor gauge dynamic comparison Volume – Measuring Equipment Air 10 cc to 25 L 2.5 % Large leak calibration system with gas expansion method ____________________________________________ 1 This laboratory offers commercial calibration service. 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, percentages are to be read as percent of reading unless otherwise noted. 4 The type of instrument or material being calibrated is defined by the parameter. This indicates the laboratory is capable of calibrating instruments that measure or generate the values in the ranges indicated for the listed measurement parameter. 5 This scope meets A2LA’s P112 Flexible Scope Policy.