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Instructions for labor protection in laboratory work using computer video display terminals. Full document

Occupational Safety and Health / Standard instructions for labor protection

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Safe Operation

1. General provisions

1.1. This instruction establishes safety requirements for the performance of laboratory work by students using video display terminals (VDTs) of all types based on cathode ray tubes of domestic and foreign production, which are used in electronic computers for collective use and personal computers (computers).

1.2. Students are allowed to perform laboratory work using computer VDT only after briefing on labor protection and fire safety, study of guidelines and this manual.

1.3. Conducting briefing and admission of students to perform laboratory work is assigned to the teacher conducting laboratory work.

1.4. Registration of the briefing is carried out by an entry in the journal of the established form with the obligatory signature of the students.

1.5. Students are not allowed to work in a computer class:

• in the absence of a teacher;
• at an unspecified time without the permission of the teacher;

1.6. Each student must work at the workplace assigned to him. Transfer to another workplace without the permission of the teacher is prohibited.

1.7. When working on computers that include VDT, users may be affected by the following dangerous and harmful production factors:

Physical:

• increased value of the voltage of the electrical circuit, the closure of which
• can pass through the human body;
• increased levels of static electricity;
• increased level of electromagnetic radiation;
• increased electric field strength;
• direct and reflected fading from screens;
• increased temperature of equipment surfaces (when working with laser and LED printers).
• unfavorable distribution of brightness in the field of view.

Chemical (when working with laser and LED printers):

• toxic (ozone);

Psychophysical:

• physical overloads of static and dynamic action;
• neuropsychic overload (mental overstrain, overstrain of analyzers, visual strain, monotony of work, emotional overload).

1.8. It must be remembered that when placing workplaces with computer VDT, the following requirements must be observed:

• the area per one workplace should be at least 6,0 m2, and the volume of the room should be at least 20 m3;
• no more than 12 students can be in the computer class at the same time;
• the distance between the side surfaces of the video terminals must be at least 1,2 m2;
• the distance between the rear surface of one video terminal and the screen of another must be at least 2,5 m;
• the passage between the rows of workplaces must be at least 1 m;
• workplaces with VDT and personal computers should be located at a distance of at least 1 m from the walls, and from walls with light openings - at least 1,5 m.

1.9. Violation of the requirements of this instruction is a violation of academic discipline, and liability arises in accordance with applicable law.

2. Safety requirements before starting work

2.1. Before performing laboratory work, the student is obliged to familiarize himself with the methodological instructions for its implementation.

2.2. Check the reliability of the installation of equipment on the desktop. VDT should not stand on the edge of the table. Rotate the VDT so that it is convenient to look at the screen - at a right angle (and not from the side) and slightly from top to bottom; while the screen should be slightly tilted - its lower edge is closer to the operator.

2.3. Check for visible damage to electrical wiring, connecting cords, plugs, sockets, etc.

2.4. Adjust and fix the height of the chair, comfortable tilt of its back for work.

2.5. Turn on the equipment with the switches on the buildings (only with the permission of the teacher) in the following sequence:

• uninterruptible power supply if the computer is connected to the network through it;
• VDT;
• system unit;
• keyboard
• printer, other peripherals.

2.6. Adjust the brightness of the VDT screen, the minimum size of the luminous dot, focus, contrast. You should not make the image too bright, so as not to tire your eyes.

2.7. Recommended:

• screen brightness - not less than 100 cd/m2;
• the ratio of the brightness of the VDT screen to the brightness of the surrounding surfaces in the working area is no more than 3:1;
• the minimum size of a luminous dot is not more than 0,4 mm for a monochrome VDT and not less than 0,6 mm for a color one;
• contrast of the sign image - not less than 80%.

2.8. If any malfunctions are found, do not start the work, notify the teacher about it.

3. Safety requirements during work

3.1. To perform laboratory work on a PC, you can start only with the permission of the teacher.

3.2. During the laboratory work, the student must strictly follow the recommendations of the guidelines for this work.

3.3. The video terminal screen and keyboard should be placed at the optimal distance from the user's eyes, which is 600 - 700 mm, but not closer than 600 mm;

3.4. The keyboard should be placed at a distance of 100 - 300 mm from the edge facing the worker;

3.5. Not allowed:

• eat at the workplace;
• independently repair equipment;
• use faulty sockets, switchboards, switches and other electrical installation devices;
• put bags and other foreign objects on the work table;
• place any objects on the equipment, sandwiches and drinks on the keyboard or near it - this may damage it;
• block the ventilation openings of the equipment, which may
• lead to overheating and failure.

3.6. In the event of an accident, the witness or the injured person must:

• immediately notify the teacher about the incident and take measures to provide medical assistance;
• to keep until the arrival of the investigation commission the situation at the workplace and equipment in the condition in which they were at the time of the event (if this does not threaten the life and health of other people and does not lead to more serious consequences).

4. Safety requirements at the end of work

4.1. At the end of the laboratory work, it is necessary to close all working files in the computer's RAM, exit the software environment, and return to Windows.

4.2. At the request of the teacher, at the end of the laboratory work, it is necessary to perform all the necessary actions in the operating system to prepare for turning off the computer.

4.3. At the end of the laboratory work, it is necessary to turn off the switches on the buildings (with the permission of the teacher):

1) printer, other peripheral devices;

2) processor;

3) VDT;

4) uninterruptible power supply if the computer is connected to the network through it;

4.4. Cover the keyboard with a cover to prevent dust from entering it.

4.5. Tidy up the workplace.

5. Safety requirements in emergency situations

5.1. Emergency situations include:

5.1.1. Sudden power outage;

5.1.2. Breakage or short circuit of the electrical circuits of the equipment;

5.1.3. Fire of equipment, electrical wiring.

5.2. In the event of a power outage:

5.2.1. Turn off the equipment in the following order:

1) peripheral devices;

2) processor;

3) VDT;

4) uninterruptible power supply unit;

5.2.2. Unplug the plugs from the sockets.

5.2.3. Notify the teacher about the incident.

5.3. In the event of an open or short circuit in electrical circuits:

5.3.1. Turn off the breaker, turn off the equipment in the above sequence;

5.3.2. Notify the teacher about the incident.

5.4. In the event of a fire:

5.4.1. Notify the instructor

5.4.2. Leave the room immediately, closing the door tightly behind you.

5.4.3. Report a fire by calling 01;

5.5. First aid sequence: