Nuclear power station containment leakage rate measurement network precision measurement system

The invention discloses a nuclear power station containment leakage rate measurement network precision measurement system. The system comprises a VXI host, a universal meter and a data acquisition computer. The VXI host comprises a shell, a VXI controller, a network path laid from a temperature and humidity sensor to the VXI host, and a multiplexer; one end of the VXI controller is connected withthe data acquisition computer, the other end of the VXI controller is connected to the multiplexer, and the multiplexer is connected to the universal meter; the multiplexer is connected to equipment to-be-measured; the data acquisition computer sends a measurement instruction to the VXI controller; the VXI controller controls the multiplexer to open a predetermined measurement channel according tothe measurement instruction; the universal meter measures a measurement target of the opened measurement channel to obtain a measurement result, and sends the measurement result to the data acquisition computer; and after rec