The scope of this Code includes signal conditioning,signal multiplexing, analog-to-digital signal conversion,and data processing. This Code addresses stand-alonedata acquisition systems, typified by a sensor with anintegral digital display, data acquisition systems thatlink multiple sensors to a common digital processor tiedto a computer or printer, and systems that link multipledigital processors to one or more stand-alone or networkedcomputers.This Code incorporates instrumentation practices coveredby other Instruments and Apparatus Supplements(PTC 19 Series) aswell as by the equipment PerformanceTest Codes. It also provides a means to determine theuncertainty associated with the data acquisition system,and its impact on the overall uncertainty of the performancetest. The Code does not directly address specificsensors or instruments used for ASME PerformanceTesting. These are addressed in other ASMEPerformance Test Codes.