Safety

1
Safety

• Unit objectives
• Identify safety issues and hazards in the
  computer environment
• Identify ways to avoid injury and strain when
  working with computers
• Identify proper methods for disposing of computer
  equipment

2
Topic A

• Topic A Safety and hazards
• Topic B Safe work practices
• Topic C Disposing computer equipment

3
Floor surfaces

• Keep floors level and dry
• Secure carpets to the floor
• Dont cross walkways with cables and power cords
• Use static protection
• Antistatic floor mats
• Static mats under the user's keyboard and/or
  computer

4
Static mat
5
Fire safety

• Keep papers orderly
• Keep combustibles away from appliances
• Use working smoke detectors in all areas
• Have appropriate fire extinguishers on hand

6
Fire extinguisher types

• Class A Ordinary compustibles
• Class B Flammable liquids
• Class C Electrical equipment
• Class D Flammable metals

7
Fire extinguisher substances

• Dry chemical
• Halon
• Water
• CO2

8
Fire extinguisher label
9
Electrical safety

• Avoid overloading electrical circuits
• Label breakers
• Use surge protectors and Universal Power Supplies
• Avoid stringing together power strips
• Avoid running electrical cords or network cables
  across walkways
• Encase cables across walkways in a cord protector
• Provide good ventilation for computer equipment
• Secure cords, lines, cables out of the way

10
Overloaded circuits
11
Air quality

• Use fans to keep the air clear
• Avoid smoking around computers
• Place working carbon monoxide detectors
  throughout the building

12
A carbon monoxide detector
13
Computer hazards

• Physical hazards
• Laser and copier toner
• Electromagnetic hazards

14
Incident reporting

• Establish policies
• Necessary for
• OSHA
• Workers compensation claims
• Insurance

15
Activity A-1
Identifying typical office and computer-related
hazards
16
High-voltage interference

• Outside interference
• Inside interference

17
Electrostatic Discharge (ESD)

• Occurs whenever static charge on two objects is
  dissimilar
• If the two objects touch, electricity from higher
  voltage charge flows to lower voltage charge
  until charges are equalized
• Can attain very high voltages
• If you touch metal object and feel electric
  discharge, voltage difference was 3,000 volts or
  more
• If spark visible when discharge occurred, voltage
  difference was at least 8,000 volts

18
Electromagnetic induction

• From fluorescent lights
• Electromagnetic field can induce a similar
  current in other nearby objects
• Network cables
• Electronic equipment
• Induction currents in network wiring can destroy
  data and can damage equipment

19
Minimizing high-voltage interference

• Maintenance
• Install ground wires
• Use anti static devices

20
Shielding and filtering

• Shielding applies primarily to a networks cables
  and is actually a refined form of grounding
• Filters are electronic devices designed to permit
  the normal function of a device, but they block
  or suppress any other signal coming from it

21
Activity A-2
Finding sources of static electricity and
interference
22
MSDS

• Physical data
• Toxicity
• Health effects
• First aid
• Reactivity
• Storage
• Disposal
• Protective equipment
• Spill/leakage procedures

23
MSDS hazard ratings
Rating Description
None No potential hazard in this category
0 The least hazard
1 A slight hazard
2 A moderate hazard
3 Highly hazardous
4 Extremely hazardous
24
Personal protection by rating
Rating Description
A Wear goggles when using this product
B Wear goggles and gloves when using this product
C Wear goggles, gloves, and other protective gear when using this product
25
Activity A-3
Reading a material safety data sheet
26
Topic B

• Topic A Safety and hazards
• Topic B Safe work practices
• Topic C Disposing of computer equipment

27
Ergonomic workstations

• Check position of
• Chair
• Monitor
• Keyboard
• Mouse
• Document holders
• Office equipment
• Phones
• Other equipment

28
Laptop safety

• Weight
• Ergonomic issues
• Heat

29
Activity B-1
Avoiding injury and strain when working with PCs
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Topic C

• Topic A Safety and hazards
• Topic B Safe work practices
• Topic C Disposing of computer equipment

31
Computer equipment disposal

• Disposal of electronics
• Hazardous materials
• Disposing of used toner and ink cartridges
• Disposal of computer equipment
• Reusing equipment
• Methods of disposal

32
Activity C-1
Selecting the proper methods for computer
equipment disposal
33
Unit summary

• Identified safety issues and hazards in the
  computer environment
• Identified ways to avoid injury and strain when
  working with computers
• Identified proper methods for disposing of
  computer equipment