Simple measuring instruments
Richard R Wayne · Oxford University Press eBooks · 1994
This chapter reviews the objective of instrumentation, which is to convert some phenomenon of chemical interest to an electrical signal, manipulate it, and turn the processed result into something useable by the experimenter. It examines output and input interfaces that provide transducers as they convert a non-electrical phenomenon to or from an electrical one. It also talks about modern instrumentation which uses a computer and its associated memory wherein the interface with the investigator is the screen display, printed results, or similar output. It also discusses the final link or output transducer, which are familiar electrical measuring instruments, such as meters, pen coders, and oscilloscopes. The chapter reviews the use of hearing in the detection of an audiofrequency a.c. signal. It considers the types of electrical signal that are converted for interpretation by the experimenter.