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This company based on field measurement of zinc oxide surge arrester DC parameter test instrument was improved, and high voltage DC power supply, measuring and control systems combine reduced instrument volume and weight. Operations setting humanity, with remote control remote measurement and automatic measurement measurement regulations add to the ambient temperature function, with a larger capacity memory, can store 50 sets of test data, without power loss. Equipped with high speed thermal printers greatly increase the print speed test results. Site power system, as well as production of zinc oxide surge arrester test necessary equipment.