What Is The Esd Mat Resistance

The lower the number the more conductive the material and may be considered.

What is the esd mat resistance.

The esd protective symbol should be used to identify items that are specifically designed to provide esd protection for esds items. Antistatic or esd mats have a high electrical resistance which allows the electrostatic discharge to flow across the surface of the mat at a slow rate enough to get the esd away from your electronics while at the same time neutralizing what little charge inevitably does build up. How strongly the material resists charge movement. They are designed for electronic repair or assembly facilities to protect esd sensitive components during the soldering process.

The grounding conductors wires from wrist straps worksurfaces flooring or floor mats tools fixtures storage units carts chairs garments and other esd technical elements may or may not. The esd surface resistance test meters are used to measure the resistivity of the esd work surface mats and floor mats. Let s take the case of a highly charged operator who is not wearing any dissipative footwear and is not grounded with a wrist strap as an example. Since static exists on the surface of an object what we want to test anti static mats for is their ability to dissipate static on their top surface or work surface.

Point to point resistance is 10 8 10 9 ohms and point to ground resistance is 10 5 10 6 ohms. The ansi esd association standard used in the united states to test that an esd mat is static dissipative is ansi esd s4 1 worksurfaces resistance measurement s. Esd soldering mats made in usa. If the esd mat or a conductive metal surface that the sensitive circuit card.

Hence the title ansi esd s4 1 worksurfaces resistance measurements. The esd association grounding standard ansi esd s6 1 recommends hard ground with no resistor for mats etc however a resistor is permissible. Rtt testing for esd resistance per ansi esd s4 1. This week s esd q a question.

Without the 1 meg resistance the static discharge would be an instantaneous drain directly to ground through the product. Esd test meters include esd surface resistance test meters and esd wrist strap test meters. The esd wrist strap test meters verify a continuous path between the wrist band and a coil cord. Examples of these are packaging esd protective clothing and personnel grounding equipment.

When measuring esd product such as esd mat resistance i have noticed that the resistance measures higher on some of my older esd rubber mats when using 10v and will sometimes be greater than 10 9 ohms. For esd control purposes materials are classified by how quickly electricity moves through the material. The speed is measured in ohms and is typically displayed in powers of 10 example 10 3.