Model PR1182 High-Spatial Resolution ESVM

The new Trek Model PR1182 Electrostatic Voltmeter is a high spatial resolution instrument which is used for a variety of electrostatic applications including contact potential measurements, materials evaluation, and electret studies. The Model PR1182 makes highly accurate, noncontacting measurement of electrostatic voltages of 0 V to ±40 V. The Model PR1182 is specifically designed for high sensitivity voltage measurement applications.

The Model PR1182 has adjustments to compensate for many sensitive testing conditions. A precision calibrated Null Voltage supply of ±10 volts may be used to null different work function (contact potentials) of the test surface or to function as a zero suppression voltage source. A response Speed Control adjusts the speed/noise tradeoff of the Model PR1182 AC response. A self locking Drift/Spacing Null Adjustment minimizes the variation in monitored voltage values as the probe to test surface spacing changes.

An easy to read 3½ digit LED display is provided while measured voltage can also be monitored through a 1:1 voltage monitor output.

The Trek patented low impedance probe assures measurement accuracy which is essentially independent of probe-to-test-surface spacing while eliminating the external environmental effects of high humidity and contamination, such as airborne dust, toner, ions and chemicals, on measurement accuracy.

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PERFORMANCE

• All specifications are with a Model PR1182P probe with a probe-to-surface separation of 100 um and the speed control at the fastest setting unless otherwise noted.

  Measurement Range
  0 to ±40 V DC or peak AC.

  Spot Spatial Resolution
  (at probe-to-surface spacing of 50 um.)
  200 um.

  Sensitivity
  Better than 10 mV.

  Accuracy
  Voltage Monitor Output
  Better than ±0.1% of full scale.
  Voltage Display
  Better than ±0.1% of full scale,
  referred to the voltage monitor.

  Speed of Response (10% to 90%)
  Less than 4 ms for a 40 V step.

  Settling Time
  Less than 10 ms.

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

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PRODUCT FEATURES

• Null Voltage Source
  A calibrated 10-turn dial representing a 10 volt supply, with switch selectable polarity, used to produce zero volts output when the probe is coupled to a known zero volt surface.
  Range
  ±10 volts.
  Accuracy
  1%.
  Resolution
  20 mV.

  Response Speed Control
  A front panel potentiometer that adjusts the speed of the Model PR1182’s AC response.

  Drift/Spacing Null Adjustment
  A back panel adjustment minimizes the variation in monitored voltage values as the probe to test surface spacing changes.

  Voltage Display
  3½ digit LED display.
  Range
  Switch selectable for ±10 V or ±40 V full scale.
  10 V Range Resolution
  0.01 V.
  40 V Range Resolution
  0.1 V.
  Zero Offset
  ±1 count, referred to the voltage monitor.
  Sampling Rate
  3 readings per second.

  Voltage Monitor Output
  A buffered 0 to ±40 V output provides a representation
  of the measured voltage.
  Scale
  1:1 of the measured voltage.
  Output Noise
  Measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter.
  Slow Speed (full counter-clockwise)
  Less than 100 mV rms.
  Fast Speed (full clockwise)
  Less than 200 mV rms.
  Output Current
  ±5 mA (minimum).
  Output Impedance
  100 ohms, nominal.

  Voltage Monitor Output (10:1 ratio)
  A buffered 0 to ±10 V output provides a representation of the measured voltage.
  Scale
  1:10 of the measured voltage.
  Output Current
  ±5 mA (minimum).
  Output Impedance
  0.1 ohms, nominal

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PROBE

Probe-to-Surface Separation
50 um to 150 um (recommended).

Probe Model PR1182P (round body)
Enclosure Dimensions
9.7 mm diameter x 50 mm (nominal) L
(0.38" diameter x 2" L).
Sensor Orientation
Side.
Cable Length
1524 mm (5 ft).

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ACCESSORIES

• Accessories Supplied
  • Operator’s manual and line cord.
• Optional
  • 344RA Full-Rack Mounting Kit (two instrument capacity)

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GENERAL

• Dimensions
  108 mm H x 223 mm W x 370 mm D
  (4.25" H x 8.75" W x 14.5" L).

  Weight
  3.6 kg (8 lb).

  Voltage Monitor Connector
  BNC coaxial connector.

  Ground Receptacle
  Banana jack.

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

  Line Supply
  Factory set for one of two voltage 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.

  Power Switch
  A two position power ON/OFF switch.

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CERTIFICATION

TREK, INC. certifies that each Model PR1182 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards.
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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