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Trek 156A Series


Charge Plate Monitor for Evaluating the Performance of Air Ionizers Used to Neutralize Static Charges

The Trek® 156A tests the efficiency of an ionizer’s ion production by timing how long it takes air ions produced to discharge a floating plate that has been pre-charged to either a positive or negative value. The Trek® 156A also tests the balance between positive and negative air ions by measuring the offset voltage generated on a floating plate due to an imbalance of positive and negative air ions impinging on the plate from the ionizer.

Typically, as an ionizer ages, the rates of positive and negative air ion production decline. Consequently, the time required for the ionizer to neutralize static charges increases, and the balance of positive and negative air ions changes. The neutralization (decay) time may become too long for the ionizer to fully neutralize charges that are generated at a work location, or the ionizer may begin to charge objects that were initially uncharged.


  • Extremely low offset and drift ensures high accuracy, making it ideal for applications requiring critical ion balance such as GMR and TMR manufacturing areas
  • NIST-traceable Certificate of Calibration provided with each unit


  • Set custom measurement capacitance for assurance that ESD process needs are met in manufacturing
  • Easily transport within a facility with the compact and lightweight design
  • Use for ESD monitoring of sensitive manufacturing processes such as semiconductor, disk drive, and LC


Operational temperature range (°C): 5 to 35
Measurement Range: 0 to ±1100 V
Measurement Accuracy (%): 0.001


Calibration and Alignment

Advanced Energy has the tools and processes to ensure your equipment continues to meet its original specifications.  Our products are calibrated at global AE service sites with proprietary technology designed to exceed industry standards​.

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