Ross Engineering Corporation

(A2LA Cert. No. 2746.01) 08/26/2024 Page 2 of 2 Parameter/Range Frequency CMC2, 3, 4 (±) Comments AC Voltage – Measure (1 to 100) mV (0.1 to 1) V (1 to 10) V (10 to 100) V (100 to 700) V (40 to 100) Hz 0.070 % + 12 µV 0.070 % + 0.12 mV 0.070 % + 1.2 mV 0.070 % + 12 mV 0.066 % + 0.20 V Agilent 3458A AC High Voltage – Generate and Measure (1 to 170) kV RMS 60 Hz 0.092 % Ross VD240 and Agilent 3458A AC Current – Measure (0 to 100) µA (0.1 to 1) mA (1 to 10) mA (10 to 100) mA (0.1 to 1) A (1 to 3) A (45 to 100) Hz 0.071 % + 0.030 µA 0.071 % + 0.20 µA 0.071 % + 2.0 µA 0.072 % + 20 µA 0.10 % + 0.20 mA 0.24 % + 2.4 mA Agilent 3458A Keysight 34461A ____________________________________________ 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 percent refers to percent of reading, unless otherwise indicated. 4 The measurands stated are measured using the indicated instrument (see Comments). This capability is suitable for the calibration of the devices intended to measure the measurand in the ranges indicated. CMC's are expressed as either a specific value that covers the full range or as a fraction/percentage of the reading plus a fixed floor specification. 5 This scope meets A2LA’s P112 Flexible Scope Policy.