Electrostatic Products

Trek 158A

Compact Charged Plate Monitor for Evaluating Air Ionization System Performance

Advanced Energy’s Trek 158A charged plate monitor evaluates the performance of ionization systems with a compact design for superior data collection and storage capability.

  • Monitored Voltage Range: 0 to ±1100 VDC or peak AC
  • Bandwidth (-3dB) : DC to 80 Hz
  • Decay Mode Thresholds: Programmable from 1 to ±1000 V in 1V increments
  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Trek® 158A charged plate monitor is the premier instrument to evaluate the performance of air ionization systems. It features a user-friendly large 7-inch screen that is active through either touch-screen control or corresponding function keys. The data is displayed in color and may be stored internally or can be easily transferred to a USB flash drive or another USB device. A charged plate assembly is required and is sold separately (6-inch charged-plate shown).


  • Use either the 7 in touch screen or function keys for control
  • Program start and stop voltage for + and - decay time ionizer tests
  • Realize more than six hours of continuous operation with the battery-operated instrument
  • Use the PC memory card port for ample data storage and easy data transfer


  • User-friendly compact design with superior data collection and storage capability
  • 0.1 V plate voltage resolution
  • Compliance to IEC 61340-5-1 and ANSI/ESD STM3.1
  • NIST-traceable Certificate of Calibration provided with each unit

Select specifications are shown below. Please see product data sheet for additional specifications.

  • Performance

    Monitored Voltage Range

    0 to ±1100 V DC or peak AC

    Bandwidth (-3 dB)

    DC to 80 Hz

    Decay Mode Thresholds

    Programmable from 1 to ±1000 V in 1 V increments

  • Voltage Monitor Output


    A BNC proving and low voltage replica of the plate voltage

    Scale Factor

    1/200th of the plate voltage

    DC Accuracy

    Better than 0.1% of full-scale

  • Mechanical

    H x W x D

    53 x 226 x 187 mm ( 2.1 x 8.9 x 7.4 in)


    2.2 kg (4.9 lb)

  • Operating Conditions


    5 to 35°C (41 to 95°F)

    Relative Humidity

    To 80%, non-condensing

  • Typical Applications

    • Performance evaluation of air ionization systems
    • ESD test equipment
    • ESD audit equipment
    • Material dissipation testing
    • Site-specific contacting voltage measurement
    • Static charge monitoring
    • Voltage measurement of floor materials and footwear in combination with a person (ANSI ESD STM97.2 and IEC 61340-4-5)

Specifications are subject to change without notice. Not all options and accessories are available for all models and configurations. Dimensions listed generally refer to standard configurations and module bodies only. Please confirm technical specifications and customizations with a sales representative. Advanced Energy is not responsible for errors or omissions.


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Trek 158A Software

Trek 158A application software

Documents & Support

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Product Support

U.S.: +1 800 446 9167
Asia: +86 29 8874 1895
China: 400 8899 130
EMEA: +44 800 032 1546
U.K.: 08000 321 546

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