IEC 62053-41-2021 Electricity metering equipment – Particular requirements – Part 41: Static meters for DC energy (classes 0,5 and 1). 5 Construction requirements The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 6 Meter marking and documentation The requirements of IEC 62052-1 1 :2020 apply, except AC meter specific items, e.g. frequency. 7 Accuracy requirements 7.1 General test conditions The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply, except that the requirements for phase sequence, voltage unbalance and waveform of Table 1 0 of IEC 62052-1 1 :2020 do not apply. 7.2 Methods of accuracy verification The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.3 Measurement uncertainty The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.4 Meter constant The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.5 Initial start-up of the meter The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.6 Test of no-load condition The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.7 Starting current test The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.8 Repeatability test The requirements, test conditions and procedures, and acceptance criteria of IEC 62052-1 1 :2020 apply. 7.9 Limits of error due to variation of the current When the meter is operated under the reference conditions given in IEC 62052-1 1 :2020, 7.1 ,the percentage errors shall not exceed the limits for the relevant accuracy class given in Table 4. If the meter is designed for the measurement of energy in both directions, the values in Table 4 shall apply for each direction. 7.1 0 Limits of error due to influence quantities Tests and test conditions given in IEC 62052-1 1 :2020, 7.1 apply. When the current is held constant as specified in Table 5, and any single influence quantity is applied one at a time, with the meter otherwise operated at reference conditions as specified in IEC 62052-1 1 :2020, 7.1 , the variation in percentage error relative to the intrinsic error shall not exceed the limits for the relevant class indexes given in Table 5. The variation in percentage error induced by the influence quantities may vary depending...
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