Walz Scale

Part 1 of 3

(A2LA Cert. No. 1868.01) 11/26/2025 Page 1 of 2 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 WALZ SCALE CO. 656 High Point Lane East Peoria, IL 61611 Josh Bieber Phone: 309 694 3200 ext 201 www.walzscale.com CALIBRATION Valid To: January 31, 2028 Certificate Number: 1868.01 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, 4: I. Mechanical Parameter/Equipment Range CMC2 (±) Comments Weights Up to 2 kg Up to 2000 lb 0.0009 % of mass value 0.0037 % of mass value ASTM Class 1 weights ASTM Class 6 weights Balances – Top Loaders3 Up to 1 kg Up to 65 kg 0.0004 % of applied load 0.016 % of applied load ASTM Class 1 weights ASTM Class F weights Scales3 – Portable Mining Scales Up to 320 000 lb Up to 1 000 000 lb 0.009 % of applied load 0.16 % of applied load ASTM Class F weights Calibrated load cells Torque Measuring – Torque Transducers Torque Tools3 Up to 300 lbf·ft Up to 250 lbf·ft 0.54 % of applied load 1.1 % of applied load Deadweight tester Calibrated transducer ____________________________________________

Part 2 of 3

(A2LA Cert. No. 1868.01) 11/26/2025 Page 2 of 2 1 This laboratory offers commercial calibration and field 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 n early ideal measuring equipment. CMC’s 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 su ch 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 scope meets A2LA’s P112 Flexible Scope Policy.

Part 3 of 3

For the calibrations to which this accreditation applies, please refer to the laboratory’s Calibration Scope of Accreditation. Accredited Laboratory A2LA has accredited WALZ SCALE CO. East Peoria, IL for technical competence in the field of Calibration This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. This laboratory also meets R205 – Specific Requirements: Calibration Laboratory Accreditation Program. This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (refer to joint ISO-ILAC-IAF Communiqué dated April 2017). Presented this 26th day of November 2025. _______________________ Mr. Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 1868.01 Valid to January 31, 2028