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ITEM |
Hazardous situations
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Hazards |
Dangerous events |
Risk decreasing measures |
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Sources |
Potential consequences of the action |
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1 |
Laser commissioning |
Direct laser radiation ranging from 400 nm to 600 nm (visible) of accessible emission limit (AEL) above the level for class 3R |
Thermal or photochemical damage to the retina (loss of sight) |
Unexpected change of spatial position of the laser radiation beam |
§ introduction of protections in the machine structure against unintended beam position change § conducting regular machine inspections § selection of appropriate protective goggles adjusted to the power and energy of the laser beam radiation according to PN-EN 208 § user information concerning strict application of protective goggles during commissioning activities |
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2 |
Laser commissioning |
Direct or reflected laser radiation ranging from 780 nm to 1,400 nm (invisible) of accessible emission limit (AEL) above the level for class 3R |
Thermal damage to the retina (loss of sight) |
Unintended / unexpected launching of the laser beam during preparatory activities before laser commissioning |
§ introducing devices preventing unexpected beam launching § introducing warning signal informing about the laser beam emission § conducting regular machine inspections § selection of appropriate protective goggles adjusted to the power and energy of the laser beam radiation according to PN-EN 208 § user information concerning strict application of protective goggles during commissioning activities |
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3 |
No response from the on/off switch during laser commissioning and warning signal concerning the beam emission |
Direct or reflected laser radiation ranging from 780 nm to 1,400 nm (invisible) of accessible emission limit (AEL) above the level for class 3R |
Thermal damage to the retina (loss of sight) |
There is no beam stop or attenuator for temporarily blocking the beam |
§ introducing beam stop or attenuator for temporarily blocking the beam, when there is a switch failure § introducing warning signal informing about the laser beam emission § conducting regular machine inspections § user information concerning strict application of protective goggles during commissioning activities |
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4 |
Observation of the processed element when there are no laser guards or protective screens |
Direct or reflected laser radiation ranging from 780 nm to 1,400 nm (invisible, of accessible emission limit (AEL) above level 1, to the eye) |
Thermal damage to the retina (loss of sight) |
Change of position angle of the laser processed element |
§ introduction of protections in the machine structure against unintended change of position of the processed element § introduction of additional laser guards or protective screens, according to PN-EN 12254 or PN-EN 60825-4 § fitting the device with appropriate glasses / protective goggles according to PN-EN 207 |
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5 |
Observation of the processed element through damaged protective guard |
Reflected laser radiation ranging from 780 nm to 1,400 nm (invisible to human eye) |
Thermal damage to the retina |
Protective guard damage |
§ performing repeated analysis of laser beam parameters and selection of its degree of resistance to laser radiation § application of a guard with a higher resistance to laser radiation § application of additional protective screens § conducting regular inspections of protective guards § fitting the device with appropriate glasses / protective goggles according to PN-EN 207 |
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6 |
Observation of the processed element above the edge of the protective guard |
Reflected laser radiation ranging from 780 nm to 1,400 nm (invisible to human eye) |
Thermal damage to the retina |
Change of reflection angle of the laser radiation from the processed element |
§ performing repeated analysis of reflection angles of laser radiation and selection of a laser guard of appropriate size § application of a guard with larger dimensions § application of additional protective screens § conducting regular machine inspections § fitting the device with appropriate glasses / protective goggles according to PN-EN 207 |
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7 |
Approach of the eye to unlabelled outlet aperture of the laser device during repair activities |
Direct laser radiation ranging from 780 nm to 1,400 nm (invisible) of accessible emission limit (AEL) above the level for class 3R |
Thermal damage to the retina (loss of sight) |
Unintended / unexpected launching of laser beam |
§ placing a label informing about the laser beam emission by the outlet aperture § introducing devices preventing unexpected beam launching § introducing warning signal informing about the laser beam emission § conducting regular machine inspections § fitting the device with appropriate glasses / protective goggles according to PN-EN 207 § user information concerning an absolute prohibition to observe the outlet aperture without wearing protective goggles |
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8 |
Emergence of a laser beam outside the laser area as a result of change of position of the optics shaping the beam |
Direct laser radiation of accessible emission limit (AEL) above the level for class 1 |
Thermal damage to the cornea or retina
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Improper mounting of the optics shaping the beam |
§ providing appropriate instructions for minimising the risk of use of inappropriate parts or inappropriate regulation unit § conducting regular machine inspections |