DNV Energy Systems Germany

Annex to the Accreditation Certificate D-K-11134-03-00 Valid from : 27.05.2025 Date of issue : 27.05.2025 Page 2 of 3 This document is a translation. The definitive version is the original German annex to the accreditation certificate. Permanent Laboratory C a l ib r at io n a n d M e as u re m e n t Ca p ab i l it ie s ( CM C) Measurement quantity / Calibration item Range Measurement conditions / procedure Expanded uncertainty of measurement Remarks Electrical quantities DC voltage Measuring instruments > 0 mV to 20 mV 33·10 -6 U + 1.9 µV U= measured value > 20 mV to 200 mV 17 ·10 -6 U + 1.9 µV > 0.2 V to 2 V 12 ·10 -6 U + 11 µV > 2 V to 20 V 9.9 ·10 -6 U + 85 µV > 20 V to 100 V 16 ·10 -6 U + 0.27 mV > 100 V to 280 V 16 ·10 -6 U + 1 mV > 280 V to 1050 V 23 ·10 -6 U + 4.3 mV AC voltage Measuring instruments 1 mV to 20 mV 15 Hz to 10 kHz 1.7 ·10 -3 U + 29 µV > 20 mV to 200mV 0.4 ·10 -3 U + 44 µV > 0.2 V to 2 V 0.19 ·10 -3 U + 0.11 mV > 2 V to 20 V 0.19 ·10 -3 U + 0.81 mV > 20 V to 100 V 0.21 ·10 -3 U + 5.8 mV > 100 V to 280 V 0.21 ·10 -3 U + 12 mV > 280 V to 1050 v 20 Hz to 1 kHz 0.33 ·10 -3 U + 63 mV DC current Measuring instruments > 10 µA to 200 µA 0.23 ·10 -3 I + 24 nA I= measured value > 0.2 mA to 2 mA 0.15 ·10 -3 I + 0.13 µA > 2 mA to 20 mA 0.11 ·10 -3 I + 0.9 µA > 20 mA to 200 mA 0.11 ·10 -3 I + 8.1 µA > 0.2 A to 2 A 0.18 ·10 -3 I + 72 µA > 2 A to 20.5 A 0.26 ·10 -3 I + 1.4 mA AC current Measuring instruments 10 µA to 200 µA 1.4 ·10 -3 I + 93 nA > 0.2 mA to 2 mA 0.97 ·10 -3 I + 0.25 µA > 2 mA to 20 mA 0.44 ·10 -3 I + 3 µA > 20 mA to 200 mA 15 Hz to 1 kHz 0.46 ·10 -3 I + 25 µA > 0.2 A to 2 A 0.55 ·10 -3 I + 0.12 mA 2 A to 20.5 A 0.85 ·10 -3 I + 5 mA

Annex to the Accreditation Certificate D-K-11134-03-00 Valid from : 27.05.2025 Date of issue : 27.05.2025 Page 3 of 3 This document is a translation. The definitive version is the original German annex to the accreditation certificate. Pe rmanent Laboratory C a l ib r at io n a n d M e as u re m e n t Ca p ab i l it ie s ( CM C) Measurement quantity / Calibration item Range Measurement conditions / procedure Expanded uncertainty of measurement Remarks Current ratio Current transformers 10 A to 25 A (primary) to 5 mA to 15 A (secondary) to 25 mV to 15 V (secondary) Comparison measurement 50 Hz to 60 Hz 0.03 % Measurement uncertainty of magnitude deviation, related to the primary quantity. 0.03 crad Measurement uncertainty of the phase angle. 10 A to 100 A (primary) to 50 mA to 1 A (secondary) to 25 mV to 1 V (secondary) Comparison measurement 250 Hz to 9 kHz 0.05 % Measurement uncertainty of magnitude deviation, related to the primary quantity. 0.19 crad Measurement uncertainty of the phase angle. > 25 A to 5 kA (primary) to 5 mA to 15 A (secondary) to 25 mV to 1 V (secondary) Comparison measurement 50 Hz; 60 Hz 0.03 % Measurement uncertainty of magnitude deviation, related to the primary quantity. 0.03 crad Measurement uncertainty of the phase angle. > 5 kA to 10 kA (primary) to 5 mA to 15 A (secondary) to 25 mV to 15 V (secondary) Comparison measurement 50 Hz; 60 Hz 0.03 % Measurement uncertainty of magnitude deviation, related to the primary quantity. 0.03 crad Measurement uncertainty of the phase angle. Abbreviations used: CMC Calibration and measurement capabilities DIN Deutsches Institut für Normung e.V. – German in stitute for standardization EN Europäische Norm – European Standard IEC International Electrotechnical Commission ISO International Organization for Standardisation