ELETTROLASER MS 3.5, Руководство пользователя и по обслуживанию

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code: UMS012 review: 0.2 date: 20/04/2022
Laser Welding machine - MS 3.5
user and maintenance manual page 14 of 102
4.4 General information on classification of lasers
Classification of lasers follows this standard:
•
CEI EN 60825-1: 2014 Safety of laser products Part 1: Classification of devices and requirements.
4.4.1 Hazard potential of laser classes
The concept of laser is insufficient to describe the hazard presented by a device emitting coherent electromagnetic radiation.
The risk potential can vary greatly according to the device in question and the conditions in which it is used. This is why international
laws recommend the assignment of a specific class to each laser system, in order for the danger potential to immediately be clear to
all. The higher the class number, the greater the risk level.
4.4.2 Classification obligation
Producers of laser devices can deliver a product to the user only after attributing it to one of the seven classes defined in the standard
on lasers (failure to assign a class would result in the user having to follow the strict rules set for class 4).
Class Risks Necessary measures
1 Harmless in normal operation conditions 1 . No necessary measures.
1M Harmless without optical tools. Warn individuals using optical tools.
2 Harmless is exposure is temporary.
•
Do not look directly at the laser ray;
•
Do not direct the laser towards the face.
2M Without optical tools: same as class 2. Warn individuals using optical tools.
3A Eliminated. Treat the same as classes 1m or 2m.
3R Moderately dangerous. For use by qualified staff only.
3B 2
•
Direct rays are dangerous for the eyes;
•
Scattered radiation is not dangerous.
•
Appoint a head of laser safety;
•
Delimit the area of use with architectonic elements;
•
Control access to the area;
•
Declare the presence of lasers at the entrance;
•
Allow use by qualified staff only;
•
Wear protective glasses if necessary.
4
•
Rays are dangerous for the eyes and skin;
•
Scattered radiation is potentially dangerous for the
eyes;
•
Risk of fire.
•
Same precautions as per class 3b;
•
Use the necessary P.P.E.
Tab. 4-1 –
Classification of lasers in compliance with standard CEI EN 60825-1:2014
Based on the active material and the pumping source, the laser can operate continuously (cw = continuous wave, with an emission
duration > 0,25 s), in pulsed mode or in repetitive pulsed mode, or can emanate its energy in the form of a single giant pulse.
4.5 Effects of laser radiation on biological tissues
4.5.1 General information
The mechanism by which laser radiation causes damage is similar for all biological systems and can lead to heat interactions,
transitory thermoacoustic events, photochemical processes and non-linear effects.
In the event of damage, the level of responsibility of each of these mechanisms can be referred to certain physical parameters of the
radiation source, the most relevant of which are the
wavelength , the duration of the pulse , the dimensions of the image , the
irradiance and the radiant exposure.
1 In normal conditions of use, class 1 lasers must be safe even in the absence of specific instructions.
2 If safety depends on imparted instructions, the lack of danger involved in using the device should not be indicated as class 1, but
with a declaration of the following kind: “No hazards in the marked area”.