Summary

6 IT Essentials: PC Harware and Software Companion GuideIdentify Safety Procedures to Protect Equipment fromDamage and Data from LossStatic electricity is the buildup of an electric charge resting on a surface. This buildup andsudden release of energy, called electrostatic discharge (ESD), can be destructive to theelectronics in a computer system.ESD, harsh climates, and poor-quality sources of electricity can cause damage to computerequipment. Follow the proper handling guidelines, be aware of environmental issues, anduse equipment that stabilizes power to prevent equipment damage and data loss.At least 3000 volts of static electricity must be built up before you can feel the ESD, butless than 30 volts of static electricity could damage a computer component. For example,static electricity can build up on a person walking across a carpeted floor. When the persontouches another person, they both receive a shock. If the discharge causes pain or makes anoise, the charge was probably above 10,000 volts.ESD Protection RecommendationsESD can cause permanent damage to electrical components. Follow these recommendationsto help prevent ESD damage:■■■■Keep all components in antistatic bags until you are ready to install them.Use grounded mats on workbenches and on the work area floor.Use antistatic wrist straps when working on computers.Avoid working on carpeted areas if possible.Climate also affects risks when working with computer equipment. Consider the followingrecommendations:■■■If the environment temperature is too high, equipment can overheat.If the humidity level is too low, the chance of ESD increases.If the humidity level is too high, equipment can suffer from moisture damage.Table 2-1 shows how environmental conditions affect the risks of ESD.Table 2-1ConditionsESD ProbabilityESD ProbabilityCool and dryWarm and humidHighLow