The ESD wrist strap is connected to the earthed metal part of a machine, by means of a clip or a connector. It is used in all areas where electrostatic discharge can cause damage, for example, where components are being fitted onto a printed circuit board or where a computer with highly integrated circuits is being assembled. See Wikipedia for more information on antistatic wrist straps.
People can charge themselves with more than 20, volts but even extremely small electric charges can cause considerable damage, for example:. What normally triggers a brief scare in everyday life can mean the total destruction of electronic components that have semiconductor elements. In paintshops, an electrostatic discharge can even trigger an explosion.
Protective ESD clothing ensures slow electrostatic discharging and prevents damage to machines. Protective ESD clothing is usually prescribed for people who work in areas where they come into contact with sensitive electronic components:. Medical staff are also often exposed to the danger of electrostatics as the devices they use are becoming more and more sensitive.
Protective ESD clothing can be recognised by the character sewn onto it. ESD protection is adequately provided by the fact that conductive fibres are woven into the fabric so that the clothing does not retain the charge but discharges it. The woven-in fibres can then block off electrostatic fields of people. As a result, the electrostatic discharge is minimised or completely prevented. For ESD protection , there are standards — manufacturers and safety officers have to comply with them.
DIN EN is the most common standard. It is complied with by using carbonised fibres. ESD clothing that can discharge static electricity must always cover the body as well as the arms and legs. Apart from ESD clothing , appropriate furniture such as conductive table tops, chairs, shelves and floor coverings in the ESD workplace can prevent electrostatic charging. Together with the corresponding soles of ESD shoes , floor coverings should guarantee that electricity is discharged to earth reliably.
Dirt and soiling are problems as they can weaken the flame-retardant properties of the materials or even cancel them out. It is therefore important to wash ESD clothing. All items of clothing have a label indicating the materials used and the recommended washing instructions.
These instructions must be complied with in order to maintain ESD protection and the ability to discharge electricity over the long term. Let us know what you think. Do you have time for a two-minute survey? Maybe Later. Prevention of Electrostatic Discharge Damage Device components that are shipped in antistatic bags are sensitive to damage from static electricity. Observe the following guidelines to minimize the potential for electrostatic discharge ESD damage, which can cause intermittent or complete component failures: Always use an ESD wrist strap when you are handling components that are subject to ESD damage, and make sure that it is in direct contact with your skin.
Warning: For safety, periodically check the resistance value of the ESD grounding strap. Figure 1: Placing a Component into an Antistatic Bag. Keep indoor air humid: Dry air increases the risk of static electricity buildup in your home. A humidifier may do the trick. Keep skin moisturized: If your skin is dry, it has a higher likelihood of developing static electricity.
You may apply lotion or moisturizer on your hands and skin. Final Word Static electricity may look like a small concern but disregarding the source of the problem may prove to become catastrophic.
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