Lake Shore Cryotronics

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(A2LA Cert. No. 6941.01) 8/21/2025 Page 1 of 3 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 LAKE SHORE CRYOTRONICS 575 McCorkle Blvd Westerville, OH 43082 Kristine Shiffman Phone: 614 891 2243 CALIBRATION Valid To: September 30, 2027 Certificate Number: 6941.01 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 calibrations1, 4: I. DC/Low Frequency Parameter/Equipment Range CMC2, 3 (±) Comments DC Current – Measure 100 nA 1 µA 10 µA 100 µA 1 mA 10 mA 100 mA 0 A 5 nA 10 nA 50 nA 100 nA 500 nA 1 µA 5 µA 10 µA 50 µA 100 µA 500 µA 3.7E-3 nA 3.1E-5 µA 3.1E-4 µA 2.1E-3 µA 4.1E-5 mA 3.8E-4 mA 5.7E-3 mA 3.2E-13 A 4.8E-4 nA 8.8E-4 nA 4.8E-3 nA 9.0E-3 nA 4.2E-2 nA 8.5E-5 µA 1.5E-4 µA 3.7E-4 µA 1.6E-3 µA 3.2E-3 µA 1.4E-2 µA 3458A digital multimeter M81 CM module M81 BCS module

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(A2LA Cert. No. 6941.01) 8/21/2025 Page 2 of 3 Parameter/Equipment Range CMC2, 3 (±) Comments DC Current – Measure (cont.) 1 mA 5 mA 10 mA 50 mA 100 mA 3.2E-5 mA 1.6E-4 mA 3.2E-4 mA 1.9E-3 mA 3.7E-3 mA 3458A digital multimeter M81 BCS module DC Voltage – Measure 0 V 5 V 10 V 0 V 5 mV 10 mV 50 mV 100 mV 500 mV 1 V 5 V 10 V 0 V 10 V 0 V 5 mV 10 mV 50 mV 100 mV 500 mV 1 V 5 V 10 V 2.3E-6 V 5.9E-5 V 1.6E-4 V 4.7E-7 V 5.3E-4 mV 6.1E-4 mV 1.2E-3 mV 1.8 E-3 mV 6.4E-3 mV 1.2E-5 V 6.0E-5 V 1.2E-4 V 4.7E-7 V 1.2E-4 V 1.8E-6 V 2.6E-3 mV 2.6E-3 mV 1.9E-3 mV 3.0E-3 mV 8.9E-3 mV 2.1E-5 V 8.4E-5 V 2.0E-4 V 3458A digital multimeter M81 SSM head M81 VM module M81 CM module M81 VS module AC Voltage – Measure 3.54 V 3.6E-3 V 3458A digital multimeter M81 SSM head _____________________________________________ 1 This laboratory offers commercial calibration service.

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(A2LA Cert. No. 6941.01) 8/21/2025 Page 3 of 3 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. 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 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. CMC’s are expressed as either a specific value that covers the full range or as a percentage or fraction of the reading plus a fixed floor specification. 4 This scope meets A2LA’s P112 Flexible Scope Policy.