Abstract: Self-validating pressure sensor is a new generation of sensor，which not only outputs the measurement value but also evaluates its performance online.A dual CPU system is implemented using DSP TMS320F2812 and TMS320C6713.It acquires the output signal of eight channels synchronously.After signal conditioning，the DSP completes fault detection，fault diagnosis and self-validating parameters calculating，then the Validated Measurement Value（VMV），Validated Uncertainty（VU） and Measurement Value Status（MVS） are output to the PC or users.Experimental results indicate that all self-validating functions of self-validating pressure sensor are implemented.With software modification of DSP，the system can be used in data acquisition and signal processing for other sensors.