University of Dayton Research Institute - Structure and Component Characterization Group

(A2LA Cert. No. 3790.01) 08/18/2025 Page 1 of 5 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 UNIVERSITY OF DAYTON RESEARCH INSTITUTE STRUCTURE AND COMPONENT CHARACTERIZATION GROUP 1031 Irving Avenue Dayton, OH 45469 Steve Fuchs Phone: 937 229 2718 CALIBRATION Valid To: July 31, 2027 Certificate Number: 3790.01 In recognition of the successful completion of the A2LA evaluation process, (including an assessment of the organization’s compliance with R205 – A2LA’s Calibration Program Requirements), accreditation is granted to this laboratory to perform the following calibrations 1, 6: I. Dimensional Parameter/Equipment Range CMC2, 5 (±) Comments Displacement – Indicator Up to 1 in 120 µin Digital micrometer, head block Displacement3 – Sensor Up to 1 in Up to 10 in (120 + 180L) µin 0.0016 in Digital micrometer digital micrometer, gage blocks Micrometers Up to 12 in (52 + 6L) µin Gage blocks Calipers Up to 12 in (280 + 6L) µin Gage blocks

(A2LA Cert. No. 3790.01) 08/18/2025 Page 3 of 5 V. Mechanical Parameter/Equipment Range CMC2, 5, 7 (±) Comments Force (Linear)3 – Measuring Equipment Tension or Compression Up to 500 lbf Up to 500 lbf (500 to 10 000) lbf (2000 to 50 000) lbf 0.044 lbf + 0.011 % 0.28 lbf + 0.06 % 0.28 lbf + 0.036 % 10 lbf + 0.04 % Dead weights Load cell using DC supply & 2- channel nano- voltmeter Force (Torsional)3 – Measuring Equipment Tension or Compression Up to 2000 lbf⋅ft (50 to 1900) lbf⋅ft 0.22 lbf⋅ft + 0.1 % 0.5 lbf⋅ft + 0.1 % Lever arm & dead weights Torque cell using DC supply & 2- channel nano- voltmeter Pressure3 – Measuring Equipment (-13.5 to 50) psig (50 to 250) psig (100 to 1000) psig (250 to 2500) psig 0.05 psig 0.04 psig + 0.02 % 0.44 psig + 0.005 % 0.74 psig + 0.007 % Pressure indicator Scales & Balances3 1 mg to 50 g 50 g to 6.1 kg (6.1 to 32) kg 0.002 mg/g + 0.01 mg + 0.8R 0.001 mg/g + 0.8R 0.0005 mg/g + 0.8R NIST Class S & S1 mass pieces Mass – Measure (1 to 220) g (220 to 410) g 410 g to 4.1 kg (4.1 to 32) kg 0.0007 mg/g + 0.15 mg 1.2 mg 12 mg 120 mg NIST Class S & S1 mass pieces

(A2LA Cert. No. 3790.01) 08/18/2025 Page 5 of 5 Parameter/Equipment Range CMC2, 5, 7 (±) Comments Rate (Displacement) (4 to 20) in/min 1 % LVDT & data acquisition unit ____________________________________________ 1 This laboratory offers commercial dimensional testing and 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 behavio r 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 This laboratory meets R205 – Specific Requirements: Calibration Laboratory Accreditation Program for the types of dimensional tests listed above and is considered equivalent to that of a calibration. 5 In the statement of CMC, percent is defined as percent of reading. L is the numerical value of the length of the device measured in inches. R is the resolution of the unit under test, and H is the recorded humidity level. 6 This scope meets A2LA’s P112 Flexible Scope Policy. 7 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. 8 The stated measured values are determined using the indicated instrument (see Comments). This capability is suitable for the calibration of the devices intended to measure or generate the measured value in the ranges indicated. CMCs are expressed as either a specific value that covers the full range or as a percent or fraction of the reading plus a fixed floor specification.