Topics - Recorder
A recorder (originally a recording milli-ammeter), now more precisely termed a potentiometric recorder, is a device that draws the chromatogram that results from a chromatographic process onto chart paper and provides a visual representation of the separation that has been achieved. The device can have a ‘full scale deflection’ (FSD) voltage that commonly ranges from 1 mv to 10 v and which can be selected to suit the output of the detector electronics. The time scale of the chart movement normally ranges from about 1 cm per second to 1 cm per hour which can also be selected to suit the separation that is being carried out. Most modern chromatographs no longer employ recorders to present the chromatogram and the results are automatically processed by a computer and presented on the computer monitor or printed out as required.