记录仪的图纸

Main purpose of a recorder is to record electrical and non-electrical quantity as a function of time. Graphic recorders use elementary rudiments like chart paper for displaying and storing the physical quantity and pen for marking the variation in physical quantity.[1] Chart paper is passed through the recorder at constant rate. The recorder itself becomes a device for measuring retention time. A certain number of inches or centimetres of chart paper corresponds to a certain number of minutes.[2]

Analog signal from the chromatograph may be connected to a recorder with chart paper speed of 5 min/in. during an analysis to measure Glutethimide concentrations in the serum and cerebrospinal fluid (CSF) using gas chromatography.[3]