This page provides the necessary procedures to follow in order to safely operate a laser. Learn the worldwide safety standards and installation precautions.
Laser Safety Standards
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How Laser Marking WorksAbout IEC 60825-1Description of IEC
The IEC (International Electrotechnical Commission) is an international organization that prepares and publishes standards for all electrical, electronic, and related technologies.
Description of laser safety standard
IEC established an international standard 'IEC 60825-1' for laser products, which serves as a common safety standard for IEC member countries.
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About FDA (CDRH)Description of FDA
The FDA (Food and Drug Administration) is a branch of the HHS (Department of Health and Human Services). The CDRH (Center for Device and Radiological Health), a division under the FDA, conducts administrative operations of radiological regulations. For production, sale and distribution of laser products in the U.S., manufacturers must comply with the requirements of these regulations.
Description of the laser safety standard
Title 21 'Radiological Health' of the CFR (Code of Federal Regulations) stipulates regulations on radiation (including lasers) as well as general rules.
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Laser Safety Measures * Safety measures based on IEC 60825 SeriesGeneral laser safetyPurpose
The purpose of laser safety standard is to prevent laser related injuries.
Safety protection against lasers can be attained when users correctly recognize the potential hazard of laser products and correctly perform a specific procedure using safety functions of laser products.
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Laser safety preventive measuresAbout laser safety preventive measures
People involved with laser products are manufacturers and users. Furthermore, users are classified into laser safety control personnel and operators.
An outline of safety measures required for individuals is as follows:
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Preventive measures for manufacturers:
Preventive safety measures for users :
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Laser Product ClassificationsIEC 60825-1
Based on the laser safety requirements specified in IEC60825-1 and FDA(CDRH)21CFR Part 1040.10, these products are classified as Class 4/ Class IV Laser Product.
IEC standard
FDA standard
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Safety measures/equipment for laser markers*
These products have the following safety measures.
Key Control
The laser system main unit starts up by turning the key-operated power switch. Pull out the key when the laser system is not being used.
Laser radiation emission warning
When the key-operated power switch is turned to [LASER ON], the unit enters a state in which the laser can oscillate, and the laser radiation emission indicator lights up.
A laser radiation emission indicator is located at the top of the marking unit and in front of the controller unit.
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Laser shutter
Automatically closes the shutter located inside the marking unit to prevent laser beam emission.
Remote interlock (Emergency stop) input terminal
The remote interlock (emergency stop) input is redundant. Opening either of the terminals stops laser emissions and stops all marking operations on the laser system. Short-circuiting both of the terminals makes laser emissions possible. The terminals are shorted with a metal bar at the time of factory shipment.
Manual reset
If one of the following states occurs, after removing the cause of the error, turn the key-operated power switch back to [POWER ON] or [OFF] once, and then turn it to [LASER ON] again to recover operations.
* For MD-V9900/MD-S/MD-F3000, it is the emergency stop input (A,B).
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Warning LabelsWarning Labels
For other series, refer to the appropriate user’s manual.
* The following warning labels, explanatory labels, and the aperture labels are attached to the marking unit of The laser system
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User's Guide
Take safety measures for class 4 laser products.
Use of Remote interlock (Emergency stop) input terminal
Connect the remote interlock (emergency stop) input terminal (remote interlock connector) of the laser system to emergency stop switches or the like to prevent laser radiation in an emergency.
Key operated power switch (Key control)
To prevent operation of the laser system by unauthorized users, the key should be managed by the Laser Safety Officer.
Setting the warning indication sign and controlled area
Post a warning sign at the entrance to the area in which the laser product is installed in order to ensure that workers and outsiders are informed about the dangers.
Termination of beam path
Installation must be performed so that it reduces the possibility of unintentional laser radiation on any object including a marking target, a machine or part of a machine, for normal and foreseeable fault conditions.
To avoid eye or skin exposure to direct or scattered laser radiation under these conditions, the laser beam emitted by the laser system must be terminated at the end of its useful path by a diffusely reflecting material of appropriate reflectivity and thermal properties or by absorbers. Protective Clothing
If skin is exposed to a laser beam reflected on a marking target in a control area where a laser product is installed, it will cause skin to burn, and clothes may catch fire. During laser operation, wear flame-resistant clothes and protect the skin as much as possible.
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Eye protection
In the controlled area in which the laser product is installed, wear protective eye goggles, regardless of whether normal use or maintenance, in case of accidental exposure to laser emission.
Protective goggles
Select protective goggles that are appropriate for the laser light wavelength.
Acrylic filter
Laser lights can be blocked by attaching the acrylic filter to the monitoring window on the equipment, the protective enclosure, or the observation window on the protective cover.
Recommended protective goggles
Note: Protective goggles are intended to protect eyes from scattered light. Never use protective goggles against exposure to direct or reflected light.
Local ventilation system
If poisonous gas is generated during laser marking on a target object, identify the substances produced by the gas and provide a local ventilation system.
Appointing a laser safety officer
Appoint a safety officer who has knowledge and experience in handling laser products in order to enforce safety management. The responsibilities of the Laser Safety Officer are as follows:
1. Suggesting prevention measures related to laser emission 2. Setting up the laser controlled area (area in which there is a risk of exposure to laser emission from the laser products) 3. Managing the key for the key-operated power switch 4. Checking the protective equipment and its use 5. Training for operators
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Installation example
The following example is for ML-Z Series. For other series, refer to the appropriate user’s manual.
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Protective Enclosure
To prevent individuals in the vicinity of the laser marker or in the laser's controlled access location from being exposed to careless reflected light when the laser marker is operating, establish a protective enclosure around the laser marker's head using material having the appropriate reflectance and heat characteristic to block the reflected light.
Safety Precautions
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Follow the instructions mentioned in this manual. Otherwise, injury to the human body (eyes and skin) may result.
The following example is for ML-Z Series. For other series, refer to the appropriate user’s manual.
1. Do not expose eye to laser radiation or diffuse reflection.
Exposing eye to laser radiation or diffuse reflection may cause blindness.
2. Do not expose skin to laser radiation or diffuse reflection.
Be careful that you do not insert a hand or other body part into the marking area during operation. Doing so may cause damage to skin, such as burns.
3. While the laser emission warning indicator lights, the area indicated on the right is the hazardous area to which the laser will be emitted.
If a part of body or an object catching fire enters this range, eyes or skin may be damaged or fire may be caused. Considering the hazardous characteristic of this range, make sure to cover with an enclosure which has appropriate reflectance and heat characteristic.
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4. When installing the head, terminate the laser beam path.
To avoid eye or skin exposure to direct or scattered laser radiation under these conditions, the laser beam emitted by the ML-Z Series must be terminated at the end of its useful path by a diffusely reflecting material of appropriate reflectivity and thermal properties or by absorbers.
5. Wear protective eye goggles appropriate for the laser beam wavelength.
Wear the protective eye goggles whose optical density for the 10.6 μm wavelength is between 5 and 7. Do not wear the protective eye goggles with the optical density exceeding 7. Otherwise the laser radiation emission indicator may not be visible. Even when wearing protective eye goggles, avoid eye exposure to direct or scattered laser radiation.
6. Do not disassemble the ML-Z Series.
Otherwise exposure to laser radiation and electric shock may result.
The ML-Z Series is not under warranty and cannot be repaired if it has been disassembled. 7. Enclose the area to which the laser will be emitted with protective enclosure.
The protective enclosure shall have proper reflectance and thermal characteristics. Be sure to terminate the laser path to prevent the laser beam is emitted to the protective enclosure directly. Otherwise exposure to unintentional laser radiation due to laser beam penetration through the protective enclosure may result.
Install the ML-Z series so that the path of the laser beam is not as the same height as that of human eye. 8. Be sure to turn off the MLZ9500 series before performing maintenance tasks such as cleaning the lens. Wear protective eye goggles during maintenance.
Otherwise exposure to unintentional laser radiation may result. Manual number 101770101 download.
9. Do not use the ML-Z Series near flammable materials.
Do not place any flammable objects or gas (organic solvents) near the laser emission opening of the ML-Z Series.
This may cause a fire.
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![]() 10. Do not irradiate the laser beam onto mirrored metal materials.
The CO2 laser cannot mark metal materials.
Never attempt to mark highly reflective metal materials. 11. ZnSe (zinc selenium) is used for the lens and other optical parts.
ZnSe is treated as a poison by law. Rely on a company that handles industrial waste when disposing of the product.
12. Turn off all power before connecting the controller power cable.13. Eliminate dust or fumes occurring during marking using an appropriate dust/fume collector to prevent these particles from entering human body.
Depending on the marking target material, this may cause damage to human body.
14. Do not use the ML-Z Series in any way other than that described in this manual.
Otherwise exposure to unintentional laser radiation may result.
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Laser Safety Terminology
This standard describes principal terms concerning laser products and safety when using laser products.
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Effects of a laser beam on the human bodyHarmful effects
If a human body is exposed to a laser beam, denaturation of protein due to the heat effect, photochemical reactions in cell tissues or tissue destruction caused by impact waves (plasma flow and resulting pressure waves) may occur. The biological effects depend on the wavelength, output, and output waveform (continuous wave or pulse wave) of the laser beam, but in general, it is more likely to cause serious, irreversible damage to the eyes rather than to the skin. Besides the direct biological effects of a laser beam, attention should be paid to secondary problems caused by the release of harmful substances generated by a laser beam irradiating processing targets or other objects around the laser marker.
Eye problems
* The CIE stands for the Commission Internationale Enluminure (International Commission on Illumination)
Skin problems
If a human body is excessively exposed to a high-power laser beam, changes from mild erythema, blister formation to carbonization occur.
* According to a notice issued by the CDRC on preventative measures against problems caused by a laser beam
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