An electrometer probe is used in an electrophotographic apparatus as part of a process control system to measure charge on a photoconductive film belt. This measurement is used to control voltage level or other process parameter of the electrophotographic process. The probe is supported in an electrometer...http://www.google.es/patents/US5956544?utm_source=gb-gplus-sharePatente US5956544 - Electrostatographic reproduction apparatus with electrometer control and method of calibrating the electrometer
Electrostatographic reproduction apparatus with electrometer control and ...