Shengli Instrument is a professional company that integrates research and development, production, and sales of instruments and meters. Its main products include multifunctional process calibrators, process signal sources, loop calibrators, thermal resistance calibrators, thermocouple calibrators, process multimeters, multifunctional standard sources, modular instruments, 4-20mA signal generators, and other thermal instruments. It also has electrical instruments and meters such as insulation resistance testers, grounding resistance testers, intelligent desktop multimeters, and intelligent handheld multimeters.

VICTOR 3127 Insulation Resistance Tester _ Chinese Manual