Our close association with, and commitment to, the electrophotography industry continues with innovative designs for voltmeters, charger-roller power supplies, and low cost, high performance OEM sensors. These products are used in an electrostatic image-forming process. Electrophotography is utilized in laser printers, copiers, fax machines and many other printing devices.(corona charging, roller charging, etc.), while electrostatic voltmeters (stand-alone or on-board) are used in electrophotography quality control and frequently provide feedback for process adjustment. Trek also supplies products for precise toner charge-to-mass ratio measurements.

Electrophotography Industry Overview New (Adobe PDF)
Models 610E, 677B, 210HS-2B, 370

 

Photoconductor Measurements

Trek’s DC feedback electrostatic voltmeters provide precise measurement of the surface potential of photoconductive surfaces.
Trek Product: 370, 347, 368A

Examples of Measurement:

• Charging Acceptance and Uniformity Testing
• Dark Decay Measurements
• Discharge Measurements
• Residual Voltage Measurement
• Time of Flight Measurements
• Lifetime Measurements
• Light Decay Measurements (Trek 370TR)
• High Spatial Resolution Measurements

Paper Charge Measurements

Trek’s DC feedback electrostatic voltmeters provide precise measurements of the voltage of the charged paper in electrophotographic processes.
Trek Product: 370, 347

Developer Roller Measurements
Trek’s DC feedback electrostatic voltmeters provide precise measurements of the surface potential of developer roller surfaces as controlled in electrophotographic processes.
Trek Product: 341B, 370, 347

Corona Charging/Discharging Supplies
Trek’s high voltage power supplies/amplifiers/controllers are used to:

• Control the DC, AC or, AC with DC offset voltages.
• Control the total output current. (It mode)
• Control the return current. (Ir mode)
• Control the output current minus the shield current. (Is mode)

Trek Product: 610E, 10/10B, 20/20C

Scorotron Grid Supplies
Trek’s high voltage power supplies/amplifiers are used to control the scorotron grid voltage to regulate the photoconductor voltage level.
Trek Product: 677B, 601C

Primary Charge Roller
Trek’s charge amplifies are used to control the charging level of a primary charge roller to uniformly charge a photoconductive surface. There supplies provide an ability to control a DC offset level with an added AC current level.
Trek Product: PM04015A

Developer Roller Supplies
Trek’s high voltage amplifier/power supplies are used to control DC, AC, or AC with DC offset voltage levels to control the voltage level of a developer roller to provide highly efficient toner transfer from the developer roller to a photoconductive surface.
Trek Product: 609E-6, 5/80

Toner Charge-to-Mass Ratio Measurement System
Trek’s charge to mass measurement system is able to accurately measure the charge to mass ratio of either dual component or single component developers.

Trek Product: 210HS-2B

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