... with IEC 62052-11, IEC62053-21.2. Functions and features 2.1 High accuracy and stability: there ... need to re-calibrate for long term operation. 2.2 Way of connection: direct connection, through CT ... moisture-resistant, fire-retardant, high temperature overall.2.4 One meter with one IC card, ... 110, 120, 220, 230,240 1.0S, 2.0S50, 60Starting currentOperating temperature range(°C)Relative humidityVoltage ...