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insulation tester megger technical index: Model HY 2533 HY2550 Output Voltage 500V DC 1000V DC 2500V DC 5000V DC Accuracy Temperature 23°C±5°C Insulation Resistance 1MΩ~20GΩ ±5% 2MΩ~40GΩ ±5% 5MΩ~100GΩ ...