This specification specifies the requirements, test methods, inspection rules, packaging, marking, transportation and storage of insulation resistance testers. This specification applies to AC power grid or battery-powered insulation resistance testers with pointer indication and digital indication (hereinafter referred to as "testers") with rated output voltage not higher than 1OKV, as well as comprehensive safety performance testers and withstand voltage insulation The insulation resistance portion of the tester. This specification does not apply to high insulation resistance testers (high resistance meters).