We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byKeeley Hoskin
Modified about 1 year ago
Safety/Electrostatic Discharge (ESD) Computer Maintenance Copyright © Texas Education Agency, 2011. All rights reserved.1
IT: Computer Maintenance - Safety & Electrostatic Discharge2 Enabling Objectives What Is Electrostatic Discharge (ESD)? Why is ESD important? ESD Damage Preventing ESD Damage ESD Workstation Components ESD Wristband or Ankle Strap ESD Floor or Table Mat ESD Garments ESD Gloves or Finger Covering Increasing Humidity Anti-static Bags Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge3 What Is Electrostatic Discharge (ESD)? Electrostatic Discharge (ESD) When two objects rub together they create friction. A by-product of friction is heat. The result of the increased molecular activity brought about by electrons moving back and forth between the two surfaces. Our bodies are constantly in motion. When we move against another material, like carpet, we create friction. This results in rapid movement of electrons, some of which remain in our bodies. This exchange of electrons builds up a charge within our bodies Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge4 What Is Electrostatic Discharge (ESD)? (cont.) Electrostatic Discharge (ESD) Built-up electrons inside us are seeking an outlet: A way to flow through us to another electrically conductive material that isn’t quite as charged up as we are Such as a doorknob When we make contact with another electrically conductive material, the electrons jump from our bodies to the other material. So static electricity is the buildup of an electrical charge within an object, such as a person, the discharge of which is in the form of electricity. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge5 Why is ESD important? Our bodies constantly generate and release static electricity. Almost every time we touch something, we discharge some amount of static electricity. While you work on a computer, you can discharge static electricity to the components of the system just by touching them. The human body can only feel an electrostatic discharge of 3000 volts OR MORE. Less than 100 volts can damage or destroy the delicate circuitry found in computers. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge6 ESD Damage Discharge of high levels of electricity into wires and components not designed to accept such levels will result in damage. Damage is not always immediately apparent. Partial damage can result in intermittent errors in the computer because some pulses still flow properly while others don’t. Users will complain of errors and problems that are not always duplicable. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge7 Preventing ESD Damage Ensure that any electrostatic buildup in your body is discharged immediately to the ground. You must provide a direct ground path from your body. Use special electrostatic dissipative products. They slow the transference of electrostatic energy, allowing it to dissipate before damaging components. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge8 Preventing ESD Damage (cont.) As a computer technician it is your responsibility to ensure you don’t cause damage to the systems you are servicing. Create an ESD workstation or environment to reduce ESD damage. A good ESD workstation should incorporate the components shown on the next slide. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge9 ESD Workstation Components ESD wristband or ankle strap ESD floor or table mats ESD garments ESD gloves or finger coverings Increased humidity The presence of moisture allows electrons to better discharge safely into the air Anti-static bags Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge10 ESD Wristband or Ankle Strap ESD wristband or ankle strap Attached to the wrist with a wire leading to a metal clip attached to the grounded object Can be grounded to various items: ESD mat ESD floor mat Metal table or chair leg Removed computer case Separated from any components you might touch Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge11 ESD Floor or Table Mat A floor mat placed where you stand The underside has contacts that provide an outlet for ESD to the ground beneath The floor and underneath the mat should be kept free of dirt and debris The table mat is placed on your work surface Provides a route to ground through: Contacts underneath to metal table or The grounding strap that runs from the mat to a grounding source Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge12 ESD Garments Worn over your clothing and provide a ground wire that can be attached to an ESD floor or table mat Made of a static dissipative material that slows ESD to give it time to discharge to the ground through the ground wire Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge13 ESD Gloves or Finger Covering Worn on the hands or fingers that will come into contact with sensitive components. Can be made of one of the following materials: Vinyl Good for anti-ESD work Special substances to dissipate or prevent ESD transference. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge14 Increasing Humidity ESD buildup is greatly reduced in a humid environment. As the presence of moisture in the air is increased, electrons are better able to discharge safely into the air instead of onto another object. Using a humidifier to increase the air moisture in your work area can greatly reduce ESD buildup. Too much humidity can cause condensation that can damage components. Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge15 Increasing Humidity The Difference in ESD Generation Based on Relative Humidity (RH) Activity10% RH65% RH Walking across carpet35,000 volts1,500 volts Walking across vinyl flooring12,000 volts250 volts Working on a computer6,000 volts700 volts Paper and plastic moving7,000 volts600 volts Lifting a component poly bag20,000 volts1,200 volts Sitting in a padded foam chair18,000 volts1,500 volts Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge16 Anti-static Bags Computer components are shipped in special plastic bags. These bags protect the components inside from ESD They should be saved and used to store the components that you work with Storing components in these bags will reduce the risk of ESD damage to the component Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge17 Types Of Anti-static Bags Electrically conductive bags Usually black or gray, coated with a metallic or carbon layer, or with a metallic weave Metal helps conduct ESD across the surface of the bag to the ground very quickly Carbon slows ESD transference, routing the charge to the ground Bags can be used over long periods of time without losing effectiveness Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge18 Types of Anti-Static Bags (continued) Electrically Dissipative Bags Usually pink, coated with a substance that slows the transference of ESD long enough for it to be conducted safely to the ground Very little protection might actually be afforded to the components inside Anti-static properties of the bag degrade over time Copyright © Texas Education Agency, 2011. All rights reserved.
IT: Computer Maintenance - Safety & Electrostatic Discharge19 Summary What Is Electrostatic Discharge (ESD)? Why is ESD important? ESD Damage Preventing ESD Damage ESD Workstation Components ESD Wristband or Ankle Strap ESD Floor or Table Mat ESD Garments ESD Gloves or Finger Covering Increasing Humidity Anti-static Bags Copyright © Texas Education Agency, 2011. All rights reserved.
Safety. Outcomes Potential health hazards when working with computer equipment. Precautions to take to prevent injuries. Steps and techniques for.
Unit 4, Lesson 9 Keeping You and Your Computer Safe AOIT Computer Systems Copyright © 2008–2013 National Academy Foundation. All rights reserved.
Copyright © 2008–2011 National Academy Foundation. All rights reserved. Unit 4, Lesson 9 Keeping You and Your Computer Safe AOIT Computer Systems.
ELECTROSTATICS IN OUR EVERYDAY LIVES. WHAT IS ELECTRIC DISCHARGE? Electric discharge is the rapid transfer of electric charges. It usually results.
Charging and Discharging Objects 9.3, 9.4, 9.8, 9.7.
Physics Unit 4 Electricity and Magnetism. 2 Forms of Electricity 1.Static – a build up of charge on an object 2.Current – a steady flow of electric charge.
How Static Electricity Affects Our Daily Lives. An example of a very large ______________________________ (when electric charges are transferred very.
How Static Electricity Affects Our Daily Lives. An example of a very large electrical discharge (when electric charges are transferred very quickly)
Copyright © 2010 McGraw-Hill Ryerson Ltd. How can objects become charged and discharged? If you walk across a carpet wearing wool socks or rubber- soled.
What do you think the term Electric Charge means?
Lesson 5 November 5 th, Lightning Lightning storm safety begins by watching for towering cloud formations that signal developing storms. Lightning.
Chapter 7 Safety. Introduction This chapter covers the following topics: Dangers of electricity Preventive measures Electrostatic discharge Safety practices.
1 Safety and Preventative Maintenance. 2 MB, One megabyte - MB or M-byte - represents about 1 million (10 6 ) bytes. Precisely, 1 MB = = 1 kB x 1 kB =
GO D2B Static Charge Unit 3: Electrical Principles and Technologies.
ESD What is it and How do we deal with it Background lightening.
1 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential014874_11_2008 ESD Best Practices Electrostatic Discharge and Grounding Cisco Best Practices.
ESD BASICS ElectroStatic Discharge (ESD) ESD Control Awareness ©Copyright 2010 DESCO INDUSTRIES INC.9/10.
Course ILT Safety Unit objectives Identify safety issues and hazards in the computer environment Identify ways to avoid injury and strain when working.
Do this now… Go to and complete the pre-lesson survey.http://tinyurl.com/SAFETY-ACTIVATOR Go to my eBoard and set up.
BASICS OF ELECTRICITY Vocabulary Understanding of Layer 1 & Layer 2 Networking Professionals need a basic understanding.
Electric Charge and Static Electricity. Law of Electric Charges The law of electric charges states that like charges repel, and opposite charges attract.
Electrical Charge and Static Electricity Things that go ZAP!!!!!!!!
Charging and Discharging Objects Remember! When an electron moves from one object to another, both objects are: Electrically charged This can happen in.
Model Continuous Workstation Monitor, Dual Wire ©Copyright 2003 DESCO INDUSTRIES INC.
Tools. Environmental Safety and Health Program requires the following: All tools be kept in good condition with regular maintenance The right tool.
CHAPTER 17: ELECTRICITY ELECTRIC CHARGE AND FORCE CHAPTER 17: ELECTRICITY.
Static Electricity Most objects have no overall charge and are neutral. Uncharged objects become charged by gaining or losing electrons. –Loses electrons.
Creating Static Electricity. Electrical Insulators Conductivity is the ability of materials to allow electrons to move freely in them Materials that hold.
Electricity and Magnetism. Atom Review Electrons have a negative charge (-) Protons have a positive charge (+)
Unit: Energy and Control. One hundred million volts! That’s how much electricity is in one bolt of lightening. Every day the Earth is struck by lightening.
Charging and Discharging Objects 9.3, 9.8, 9.5, 9.7.
Computer Engineering Technology I – Pilot Objective Use appropriate safety procedures. Course Weight : 2%
Static Electricity. Static Electricity All Around Us The shocks you get from walking across a carpet and touching a metal doorknob look like small lightning.
CIT In this chapter you will learn how to: Care for the external parts of the computer Describe methods for keeping the inside of the case problem-free.
2000 Doug Mason1 ESD Thoughts and theories ESD things I think about (Rev. 1) Do you have other ESD topics we should clarify.
EXAMPLES AND USES OF STATIC ELECTRICITY Habiba Sallam.
ELECTRICITY. TYPES OF ELECTRICITY Electricity is the study of how charges interact. In general, electricity refers to electric charge. There are two types.
The line of force or Field line direction is the path a small positive test charge would follow if free to move Electric field patterns An electric field.
7.1 Electric Charge. Atoms contain particles called protons, neutrons, and electrons. Protons and electrons have electric charge, and neutrons have no.
Electricity – Chapter 16 There are 2 types of Electricity 1. Static Electricity (Electrostatics) - a build up of electric charges 2. Current Electricity.
Introduction to Electricity Exploring Static Charges.
Conductors and insulators.. Shocking! If you reach for a metal doorknob after walking across a carpet, you might see a spark. The spark is caused.
What is Electric Charge? Which particles inside atoms have a charge? A: Protons (+) Electrons (–) Charge is a physical property—if an object has.
ESD BASICS Basic Concepts in ElectroStatic Discharge (ESD) ©Copyright 2005 DESCO INDUSTRIES INC.9/05.
Static Electricity. Atoms Every type of matter is made of tiny particles called atoms. Inside each atom, there are many tinier called protons and electrons.
Electrostatics (Static Electricity) 1. Atom review 2. Charged Objects 3. Laws of electric charges 4. Electrostatic Series 5. Sparks and Lightning.
Charging by Induction. Induction: a definition the movement of electrons within a substance caused by the approach of a charged object (no contact)
Electricity. Electricity is a force created by a difference in charges (+ & -) due to gained or lost electrons. (an electron is a negatively charged particle.)
Charging by Induction. Have you ever been able to stick a balloon onto a wall after rubbing it on your sweater? How is this possible? You know that the.
Current Electricity is the rate at which charges pass a given point. The higher the current is the greater the number of charges pass the point each second.
© 2017 SlidePlayer.com Inc. All rights reserved.