Laser obstacle removal device GB/T7247.1 certification

Laser obstacle removal device GB/T7247.1 certification

Standard basis and version

GB/T 7247.1-2024 "Safety of Laser Products - Part 1: Equipment Classification and Requirements" was officially implemented on April 1, 2025. It is 

equivalent to the international standard IEC 60825-1:2014 and has been adapted to suit the practical applications of laser products in China. This 

standard applies to laser products with a wavelength range from 180 nm to 1 mm. As a high-power industrial laser device, the laser obstacle removal

 equipment falls within the mandatory compliance scope.

Laser radiation safety testing

This is a core testing project that requires measuring the Accessible Emission Level (AEL) of a laser obstacle removal device in a controlled laboratory 

environment. Specifically, it includes: laser output power/energy density measurement, irradiance testing, precise wavelength determination, beam

 divergence angle analysis, pulse characteristics (pulse width, repetition rate, peak power) analysis, and evaluation of the cumulative thermal effect of 

repeated pulses for pulsed light sources. For obstacle removal devices that adopt a scanning mode, the radiation distribution under scanning conditions 

also needs to be evaluated.

Safety level classification assessment

Based on the measured indicators such as laser wavelength, output power, and pulse parameters, the laser obstacle removal device is classified into

 Class 1 to Class 4 (including subcategories 1M, 2M, 3R, and 3B) according to the classification rules outlined in the standard. The vast majority of laser

 obstacle removal devices used in electrical operations, with power typically exceeding 500W or even 1000W, are generally classified as Class 4, which 

is the highest hazard level, posing risks of eye and skin injuries as well as fire hazards. The new version of the standard also introduces the evaluation 

concept of Class 4M.

Inspection of engineering protective measures

The focus is on verifying whether the physical protection and engineering control of the equipment are in place. This includes: the integrity and durability

 of the protective housing, the effectiveness of safety interlock devices (such as automatic light cut-off when the housing is opened), the configuration of

 baffles and beam stoppers/attenuators, the function of remote interlock connectors, manual reset requirements, key controller settings, laser radiation

 emission warning devices (including audible and visual alarms), and the response of emergency stop buttons. For Class 4 equipment, the standard requires 

the provision of a dual interlock and dynamic termination system.

Label and instruction review

Check whether the product body and operation interface are labeled with durable laser warning labels that meet the requirements of the new standard, 

including graphical warning symbols (such as the "Beware of Laser Radiation" icon). Also, review whether the user manual fully indicates the laser safety

 level, operation precautions, mandatory requirement to wear protective glasses, and specifications for establishing Class 4 control areas. The new standard 

introduces a large number of graphical identifiers to replace pure text warnings.

Electrical and mechanical safety assessment

Review the electrical safety design documents of the equipment, including overload protection, circuit insulation, grounding continuity, etc. Simultaneously, 

conduct mechanical safety assessments, such as equipment tipping protection (automatic power cut-off in case of tipping), cooling system effectiveness,

 enclosure protection level (IP code), etc., to ensure that the equipment remains safe even under single fault conditions.

Plasma radiation assessment (new)

The 2024 version of the standard incorporates laser-induced plasma radiation into the safety assessment system for the first time, explicitly stipulating that

 the secondary radiation at a distance of 30 cm must not exceed 0.8 mW/cm². This sets new detection requirements for plasma by-products generated by

 high-power laser obstacle removal devices when ablating target materials.

Wavelength coverage extension

The new version of the standard adopts an extended algorithm, expanding the evaluation wavelength range from the previous 380-1400 nm to 200-3000 

nm. This means that regardless of the laser used (such as 1064 nm fiber laser or CO₂ laser), a laser obstacle removal device must undergo safety evaluation 

across the full wavelength range.

Inspection process and cycle

Enterprises need to choose a third-party testing agency with CNAS/CMA qualifications, submit product technical information (specifications, laser parameters, 

circuit diagrams, optical design descriptions, protective measures descriptions, product photos, and structural diagrams), and send a complete prototype for 

inspection. The laboratory will conduct full testing and issue a test report. The regular testing cycle is about 7 working days, and the urgent service can be 

shortened to 3-5 working days. Due to the complex evaluation of high-power pulsed lasers involved, the testing difficulty and time consumption of laser 

obstacle removal devices are much higher than those of ordinary laser equipment