Celebrating 40 Years of Innovation: 1968-2008

Products: Charge-to-Mass Ratio Test System

Trek's Charge-to-Mass Ratio System (Model 210HS-2B) is a portable Q/m analyzer which provides repeatable high accuracy toner charge measurements. This unit can be used directly on the production line as well as in the laboratory. It employs unique technology to avoid measurement errors that can occur with other systems.

TREK Model 210HS-2B Q/m Test System

Trek offers a unique, small, and portable Q/m analyzer which utilizes the “draw-off” toner transfer method to yield repeatable high accuracy toner charge measurements. The Trek Model 210HS-2B Charge-to-Mass Ratio (Q/m) Test System* is used to quickly and accurately determine the charge-to-mass ratio characteristics of both single and dual component electrophotographic toners and other charged particulates. Interchangeable mesh filters accommodate various sizes of charged particles. The system is highly portable for use directly on the production line as well as in the laboratory.

The Trek Model 210HS-2B system employs a unique specimen separation and transfer technique which avoids the creation of measurement errors due to the undesired additional charging of the toner as caused by the rapid air movement associated with "blow-off" type measurement systems.

The Trek Model 210HS-2B is configured as a separate main indicator unit, a plug-in sample cell unit, and a plug-in absorption nozzle unit to allow for different configurations in response to various user applications. When stronger suction is required, such as for single component toners, an optional external pump is used which is controlled by the Main Indicator Unit.

* Measuring toner mass requires the use of a weigh scale which is not included in the Charge-to-Mass Ratio Test System.

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PERFORMANCE

  • Measurement Range
    0 to ±2 microcoulomb (1.999 µC) full scale. (Other ranges optionally available.)
  • Measurement Resolution
    0.001 µC (1 nC).
  • Accuracy
    Better than 0.25% of full scale (±5 nC).
  • Stability
    • Drift with Time
      Less than ±0.005 nC/s.
    • Drift with Temperature
      Less than 200 ppm/°C,
      over the range of 15 °C to 35 °C.
  • Vacuum Pressure
    10 kPa.
  • Internal Pump
    • At 60 Hz line frequency:
      • Maximum blow-out Pressure
        0.01 MPa (0.1 kg f /cm² ).
      • Maximum blow-out quantity
        28.0 liters/minute.
      • Maximum suction pressure
        0.032 MPa (0.32 kg f /cm²).
    • At 50 Hz line frequency:
      • Maximum blow-out Pressure
        0.01 MPa (0.1 kg f /cm²).
      • Maximum blow-out quantity
        26.0 liters/minute.
      • Maximum suction pressure
        0.029 MPa (0.29 kg f /cm²)

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PRODUCT FEATURES

  • Main Indicator Unit Front Panel
    • Pump Switch
      Activates the internal or external pump(s).
    • Input 1 Connector
      A BNC connector for connecting the Absorption Nozzle Unit to the Main Indicator Unit.
    • Input 2 Connector
      A BNC connector for connecting the Sample Cell Case to the Main Indicator Unit.
    • Air Connector
      A connector for connection of the air hose of the Absorption Nozzle Unit.
    • Reset 1 Switch
      A switch to null the coulombmeter for the Absorption Nozzle Unit.
    • Reset 2 Switch
      A switch to null the coulombmeter for the Sample Cell Case.
    • Display 1
      A display to indicate the charge of the Faraday cage in the Absorption Nozzle Unit.
    • Display 2
      A display to indicate the charge of the Faraday cage in the Sample Cell Case.
  • Main Indicator Unit Rear Panel
    • P1/P2/P1P2 Switch
      A switch to designate control of an internal pump, an external pump, or both.
    • AC Outlet Connector
      A switched outlet to control an external pump.

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ACCESSORIES

  • Accessories Supplied
    • Screw driver, plastic wrench, extra silicon tubes, extra silicon tubes, Type #2 filter papers (H6001), extra No. 400 mesh screens, line cord, and manual.
    • Nozzle Filter Section
      Nozzle Filter set, Filter Case, Nozzle Hose, Filter Case Stopper, and silicon tubes.
    • Cell Case Section
      Sample Cell Case (with Cell Case, Cell Case Stand and Cell Case Stopper), and No. 400 stainless steel mesh screens.
  • Accessories Available
    • External Pump with interconnect tube (43537).
    • Carrying case.

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GENERAL

  • Main Indicator Unit
    • Dimensions
      210 mm H x 250 mm W x 370 mm D
      (8.26" H x 9.8" W x 14.56" D).
    • Weight
      6 kg (13 lb).
    • Power Requirements
      Line supply of 104 to 127 V AC, or 198 V to 242 V AC, at 48 to 63 Hz (specify when ordering).
  • Sample Cell Case
    • Dimensions
      40 mm H x 120 mm W x 120 mm D
      (1.57" H x 4.72" W x 4.72" D).
    • Weight
      0.5 kg (1.1 lb).
    • Stainless Steel Mesh (supplied)
      Plain Woven No. 400
      0.030 mm diameter,
      0.034 mm opening,
      27.8% opening ratio.
  • Absorption Nozzle Unit
    • Dimensions
      1600 mm L (63" L).
    • Weight
      350 g (0.8 lb).
    • Operating Conditions
      Temperature
      5 °C to 40 °C.

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CERTIFICATION

TREK, INC. certifies that every Model 210HS-2B Q/m Test system is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory.

All specifications are subject to change.

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