Ralston Instruments

(A2LA Cert. No. 6635.01) 04/10/2025 Page 2 of 2 Parameter/Equipment Range CMC2, 4 (±) Comments Pressure – Measuring Equipment (cont) (0 to 1000) psig (0 to 3000) psig (0 to 5000) psig (0 to 10 000) psig (0 to 30 000) psig 0.006 % of Reading + 0.05 psi 0.006 % of Reading + 0.15 psi 0.007 % of Reading + 0.25 psi 0.014 % of Reading + 1.0 psi 0.015 % of Reading + 6.0 psi Pneumatic, Fluke 8270A, PM600- A7M Pneumatic, Fluke 8370A, PM600- A20M Pneumatic, Fluke 8370A, PM600- A40M Pneumatic, Fluke 8370A PM630- A70M Hydraulic Fluid, Fluke PPCH- A200M-S II. Thermodynamics Parameter/Equipment Range CMC2, 4 (±) Comments Temperature – Measuring Equipment (-30 to 150) °C 0.025 °C Fluke 1529, Fluke 7341, Fluke 5628 ___________________________ 1 This laboratory offers commercial calibration service. 2 Calibration and Measurement Capability (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. Calibration and Measurement Capabilities 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 This scope meets A2LA’s P112 Flexible Scope Policy. 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.

For the calibrations to which this accreditation applies, please refer to the laboratory’s Calibration Scope of Accreditation. Accredited Laboratory A2LA has accredited RALSTON INSTRUMENTS, LLC Newbury, OH 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 10th day of April 2025. _______________________ Mr. Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 6635.01 Valid to January 31, 2027