• Desco
  • EMIT
  • ESD Systems.com
  • Menda Pump
  • Menda-ID
  • Protektive Pak
  • SCS
  • Smart Clock
  • Special Team
  • Statguard Flooring

ESD Superstore – Online Leader for ESD Solutions
000 Checkout

Added to your cart

You do not have any items in your shopping cart at this time.
View All cart items

  Shop from our other Desco
  Industries websites:

Europe

United Kingdom

Asia

Questions And Answers

# List All Questions Search List by Category
Question Some of our ESD benches have the wrist strap going directly to ground and others to a work bench ESD mat which (on the opposite corner) then goes through a resistor to ground. Which is right? - James, Dallas, TX
Answer Neither are necessarily correct because of the dependency on the relationship of the wrist strap that is directly grounded and the potential of the workbenchmat. The concept of grounding at an ESD safe bench is to bring to the same potential all conductors, thus minimizing the possibility of a potential difference between two conductors or its resultant discharge. Power ground or earth ground happen to be a convenient potential to connect into because it is consistent within the controlled environment. If both the wrist strap and the ESD mat are connected to the same point at ground, then they have the same potential and are properly setup. The wrist strap that connects first to the ESD mat, second through the mat, third from the opposite corner of the mat and fourth to ground has the addition of the serial impedance of the mat (resistance and capacitance) to ground to contend with. At times the operator may be at a different potential than grounded bench equipment or ESD sensitive devices on the mat.
Related Categories:
 
If you have found this Q/A useful, please rate it based on its helpfulness.
Rating Rating Rating Rating Rating
This question has been rated: 83%83%83%83%83%83%
(83% at 12 Ratings)