Exercise 1. Before reading try to remember any devices or methods that can protect the data and equipment.

· Surge suppressor - Helps protect against damage from surges and spikes. A surge suppressor diverts extra electrical voltage that is on the line to the ground.

 

· Uninterruptible power supply (UPS) - Helps protect against potential electrical power problems by supplying a consistent level of electrical power to a computer or other device. The battery is constantly recharging while the UPS is in use. The UPS provides a consistent quality of power when brownouts and blackouts occur. Many UPS devices can communicate directly with the computer operating system. This communication allows the UPS to safely shut down the computer and save data prior to the UPS losing all battery power.

 

· Standby power supply (SPS) - Helps protect against potential electrical power problems by providing a backup battery to supply power when the incoming voltage drops below the normal level. The battery is on standby during normal operation. When the voltage decreases, the battery provides DC power to a power inverter, which converts it to AC power for the computer. This device is not as reliable as a UPS because of the time it takes to switch over to the battery. If the switching device fails, the battery cannot supply power to the computer.

CAUTION: UPS manufacturers suggest never plugging a laser printer into a UPS because the printer could overload the UPS.

 

Exercise 2. Read and translate the text.

Safety data sheet.

Computers and peripherals contain materials that can be harmful to the environment. Hazardous materials are sometimes called toxic waste. These materials can contain high concentrations of heavy metals such as cadmium, lead, or mercury. The regulations for the disposal of hazardous materials vary by state or country. Contact the local recycling or waste removal authorities in your community for information about disposal procedures and services.

A Safety Data Sheet (SDS) used to be known as a Material Safety and Data Sheet (MSDS). A Safety Data Sheet is a fact sheet that summarizes information about material identification, including hazardous ingredients that can affect personal health, fire hazards, and first-aid requirements. The SDS contains chemical reactivity and incompatibility information. It also includes protective measures for the safe handling and storage of materials and spill, leak, and disposal procedures.

To determine if a material is classified as hazardous, consult the manufacturer’s SDS. In the United States, the Occupational Safety and Health Administration (OSHA) requires that all hazardous materials be accompanied by an SDS when transferred to a new owner. The SDS information included with products purchased for computer repairs or maintenance can be relevant to computer technicians. OSHA also requires that employees be informed about the materials that they are working with and be provided with material safety information.

The SDS explains how to dispose of potentially hazardous materials in the safest manner. Always check local regulations concerning acceptable disposal methods before disposing of any electronic equipment.

The SDS contains valuable information:

· Name of the material

· Physical properties of the material

· Hazardous ingredients contained in the material

· Reactivity data, such as fire and explosion data

· Procedures for spills and leaks

· Special precautions

· Health hazards

· Special protection requirements

In the European Union, the regulation Registration, Evaluation, Authorisation and restriction of Chemicals (REACH) came into effect on June 1, 2007, replacing various directives and regulations with a single system.

 

Exercise 3. Using the internet resources try to find the information about safety disposal of:

Batteries, monitors, toner kits and cartridges, chemical solvents.

UNIT 3. Computer assembly.