Functions of data acquisition system. 1. Handling of analog signals 2. Relates to the process of collecting the input data in digital form,as rapidly, accurately, completely and economically as necessary. 3. Making the measurement of electrical or physical phenomenon such as voltage, current, temperature, pressure, or sound 4. Converting the data to digital form and handling it 5. Internal programming and control 6. Connectivity capabilities of industry-standard computers providing a more powerful, flexible, and cost-effective measurement solution.