Celebrating 40 Years of Innovation: 1968-2008

Products: Electrostatic Voltmeter Instruments

Model P0865 High-Sensitivity, DC Stable ESVM

The Trek Model P0865 is a DC stable, precision electrostatic voltmeter for making noncontacting surface voltage measurements in the range of 0 to ±10 kV DC or peak AC.

Research and industrial applications include charge accumulation monitoring of the LCD production processes, monitoring surface potentials in the electrostatic painting process, research and development in the electrophotographic process, and measuring electrostatic potentials on polymers, rubber, fabrics, and paper.

The Model P0865 employs a field-nulling technique for noncontacting voltage measurement that achieves DC stability and high accuracy even if the probe-to-surface spacing changes. This permits measurements of either stationary or moving surfaces without the need to establish fixed spacing to maintain accuracy.

The Model P0865 patented probe design eliminates the need for close tolerance components. This significantly improves noise and drift performance, both in the presence of contaminating particulates and under conditions of high humidity and wide temperature ranges.

A precision voltage monitor provides a low-voltage replica of the measured electrostatic potential for monitoring purposes, or for use as a feedback signal in a closed-loop system.

The Model 3450 probe assembly includes a sensitive electrode and preamplifier, which is driven to the same potential as the measured value to eliminate arcing there between. A three (3) meter cable permits remote probe positioning. The Model P0865 can be operated on a bench top or, with optional hardware, in a standard 19-inch rack.

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PERFORMANCE

  • Measurement Range
    0 to ±10 kV DC or peak AC.

    Accuracy
    Better than ±0.1% of full scale
    as referred to the voltage monitor).

    Speed of Response 
    (10% to 90%) 
    Less than 200 µs for a 1 kV step change.
    Less than 5 ms for a 10 kV step change. 

    Full Signal Bandwidth 
    DC to better than 50 Hz.

    Stability
    Drift with Time
    Less than 100 ppm/hour, noncumulative.
    Drift with Temperature
    Less than 200 ppm/°C.

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PRODUCT FEATURES

  • High-Voltage Ready LED
    A LED indicator illuminates when the Model P0865 electrostatic voltmeter is ready to make high-voltage measurements.

    High-Voltage ON/OFF
    A two-position toggle switch that turns on and off the high voltage supply inside the instrument. 

    Zero Adjust
    A ten-turn control to null offsets or other zero errors which occur within the system.

    Voltage Monitor Output
    A buffered output providing a replica of the measured voltage.
    Scale 
    1/1000th of the measured voltage.
    Output Noise
    Less than 20 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    Output Impedance
    Less than 0.1 ohm.

    Voltage Display
    4 1/2 digit LED display.
    Range
    0 to ±10,000 V.
    Resolution
    1 V.
    Zero Offset
    Less than ±2 counts, referred to the voltage monitor.
    Sampling Rate
    Three (3) readings per second.

    Power On/Off 
    A two-position rocker switch that turns on and off the main power.

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PROBE

Probe holder assembly (not supplied) should be of a non-dissipative material with insulating properties.

Recommended Probe-to-Surface Separation
3 mm ±1 mm.

Standard Resolution Probe
Model 3450 (side viewing).
Aperture Size 
3.05 mm x 1.52 mm.

High Temperature Probes 
(up to 100 °C)
Model 3455ET (end-viewing).
Aperture Size 
1.52 mm diameter.
Model 3453ST (side-viewing).
Aperture Size 
3.05 mm x 1.52 mm.

Probe Body Type
Square. 

Dimensions 
11.8 mm H x 11.1 mm W x 76 mm L
(0.5" H x 0.4" W x 3" L).

Probe Cable Length
3048 mm ±76 mm (10 ft. ±3 in.).

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ACCESSORIES

  • Accessories Supplied
    • Operator’s manual and line cord.
  • Optional
    • Model 3450EC Probe Extension Cable 
      (from Model P0865 to Probe) (p/n17218) 

      Model 3460-1 Line Driver (p/n 17181)

      Full-Rack Mounting Kit 607RA Rack Mount Kit (19-inch) (p/n C4062)

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GENERAL

  • Power Requirements
    Line Supply 
    Factory set for one of two ranges:
    90 to 127 V AC or 180 to 250 V AC, at 48 to 63 Hz
    (specify when ordering). 

    Operating Conditions
    Temperature
    0°C to 40°C.
    Relative Humidity
    To 90%, noncondensing.

    Dimensions
    134 mm H x 432 mm W x 432 mm L
    (5.25" H x 17"  W x 17" L).

    Weight
    15 kg (33 lb).

    Voltage Monitor Connector
    BNC connector.

    Ground Receptacle
    Binding post.

    AC Line Cord Receptacle
    Standard three-prong line cord receptacle with an integral fuse holder.

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CERTIFICATION

TREK, INC. certifies that each Model P0865 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.

Low-Voltage Safety Compliance 
(EN 61010-1)
Overvoltage Category
CAT II: Local-level mains, appliances, portable equipment.
Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.

All specifications are subject to change.

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