Programmable power supply insulation resistance and grounding resistance comprehensive test instrument

The utility model discloses a programmable power supply insulation resistance and grounding resistance comprehensive test instrument, which comprises an insulation resistance testing circuit, a grounding resistance testing circuit, an A/D (Analog to Digital) converter, a microcontroller, a keyboard and a display, wherein signal output ends of the insulation resistance testing circuit and the grounding resistance testing circuit are both connected with the A/D converter, the A/D converter is connected with the microcontroller through a signal transmission line, and the keyboard and the display are connected to the microcontroller through interfaces. The comprehensive test instrument can better realize the comprehensive test of power supply insulation resistance and grounding resistance of electrical equipment, has a small size, a large measurement range, high testing precision and reliable performance, is convenient to carry and use and easy to operate, works stably, and can realize integration of measurement, control and display.