Dependence of ESD charge voltage on humidity in data centers: Part I - Test methods

Atieh Talebzadeh, Mahdi Moradian, Yunan Han, Abhishek Patnaik, David E. Swenson, David Pommerenke

Research output: Contribution to journalConference articlepeer-review


The effect of absolute and relative humidity on the charge generated in the human body during different human activities was investigated. Environmental conditions were varied between a relative humidity of 8% to 45% in a temperature range of 5°C to 38°C (41°F to 100.4°F); additionally, a wide range of footwear and flooring types were considered. The human activities studied included well-defined walking, random walking and scraping feet, taking off a sweater and dropping it, and standing up from a chair. The first part of this three-part paper mainly describes the test and data analysis methodology. One conclusion based on the voltages generated across different footwear and flooring combinations is that charge generation depends on the particular activity and associated materials. However, low relative humidity and a low, but not very low, dew point in general produce conditions favorable for high-voltage generation. Of all of the experiments performed, standing up from a chair yielded the highest body voltage. Two other parts of the three-part paper present a detailed analysis.

Original languageEnglish
Pages (from-to)58-70
Number of pages13
JournalASHRAE Conference-Papers
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event2015 ASHRAE Winter Conference - Chicago, United States
Duration: 24 Jan 201528 Jan 2015

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

Cite this