Patent ID: 6681084
Filing Date: 2004-01-20
Classification: G03G

Abstract:
A method for determining an humidity in a xerographic printing machine with a corona generating device having a grid, a coronode, and a power supply for supply power to said grid and coronode, comprising:measuring a first temperature in a xerographic printing machine; setting the grid at a predefined voltage with the power supply; applying a charge output voltage and a charge output current to the coronode with the power supply; monitoring the charge output voltage and the charge output current to the coronode from the power supply until a predefined charge output voltage is reached; changing the first temperature in a xerographic printing machine to a second temperature; repeating said setting, said applying, and said monitoring for a second temperature; correlating the charge output current when said predefined charge output voltage is reached at said first temperature to the charge output current when said predefined charge output voltage is reached at said second temperature to an humidity value.