**First, Maintenance of the Safety Helmet Lateral Stiffness Tester**
It is essential to ensure that the safety helmet lateral stiffness tester and its accessories are in good condition. Regular daily maintenance and proper care should be carried out to maintain the equipment’s performance. Personnel responsible for the instrument must have a thorough understanding of its functions, operating procedures, and technical specifications. They should also keep detailed technical records and instructions for future reference.
The equipment should always be kept clean and well-organized. If any abnormalities occur during operation, do not attempt to fix them on your own. Instead, contact our company via phone or email, and have the necessary repairs performed by our trained technicians.
**Second, Purpose of the Helmet Lateral Rigidity Tester**
The hard hat lateral rigidity tester is primarily used to assess the lateral stiffness and deformation characteristics of safety helmets. This ensures that the helmet meets required safety standards and can effectively protect the user during impact.
**Third, Key Features of the Safety Helmet Lateral Rigidity Testing Machine**
1. According to GBT2812-2006, the testing device consists of a universal material testing machine and two 100 mm diameter metal plates with a hardness of at least 45HRC.
2. The system uses a stainless steel lever with smooth lifting and lowering mechanisms for easy and safe operation.
3. A high-precision pressure sensor is integrated to display real-time force values and automatically record the maximum force applied.
4. A high-precision electronic ruler provides accurate distance measurements with a resolution of 0.1 mm, meeting all standard requirements.
5. The machine can measure a maximum displacement of 230 mm (with 1 mm accuracy) and a maximum force of 750 N, ensuring full compliance with test standards.
6. It includes an automatic timer function with 0.1-second accuracy for precise timing during tests.
**Fourth, Operation Precautions for the Safety Helmet Lateral Stiffness Tester**
Before using the equipment, operators must read and fully understand the user manual. Ensure the power supply is single-phase AC and that a reliable grounding connection is in place to prevent electrical hazards.
During testing, the instrument casing must be levelled properly. Smoking is strictly prohibited in the storage area, and fire extinguishing equipment such as COâ‚‚ extinguishers should be readily available. Operators should wear protective clothing and gloves throughout the process to avoid injury from sharp edges or accidental burns.
The testing machine is equipped with an electronic ruler and a lower limit warning system. If a buzzer alarm sounds, stop immediately and reverse the lever to avoid damaging the measuring device. Adjust the upper and lower limits if necessary.
**Fifth, Preparation Before the Test**
1. Prepare a sample safety helmet for testing.
2. Prepare a data sheet or recording tool to document the results.
**Sixth, Operating Instructions for the Safety Helmet Lateral Rigidity Tester**
Turn on the power and allow the machine to warm up for 10 minutes. Before each test, reset the force reading and perform a calibration check. The display will show the actual distance between the upper and lower plates.
Set the timer on the panel to 12 minutes. Adjust the lever to raise the upper plate to an appropriate height, then place the helmet between the two plates, ensuring the brim is aligned as close as possible to the plates.
Gently turn the lever to apply pressure to the helmet. Apply a vertical force of 30 N, press the “Start Timer†button, and hold for 30 seconds. Record the distance between the plates as Y1. Then increase the load at a rate of 100 N/min until reaching 430 N, and hold for another 30 seconds. Record the new distance as Y2.
Next, reduce the load back to 25 N at the same rate, then increase it again to 30 N for 30 seconds. Record the final distance as Y3. Press “Stop Timer†to clear the display. Document any visible damage during the process.
Calculate the maximum deformation as Y2 - Y1, and the residual deformation as Y3 - Y1. All measurements should be accurate to within 1 mm. Repeat the test if needed. After completion, turn off the power and unplug the device.
**Seventh, Determining Whether the Helmet Meets the Lateral Rigidity Standards**
According to GB2811-2007, the maximum deformation (Y2 - Y1) must not exceed 40 mm, and the residual deformation (Y3 - Y1) must not exceed 15 mm. Additionally, the helmet shell must remain intact without any fragments falling off. If all criteria are met, the helmet is considered qualified; otherwise, it is rejected.
This comprehensive guide ensures safe, accurate, and reliable testing of safety helmets, helping to maintain high-quality standards in protective equipment.
China Searun Solar Solution Co., Ltd. , https://www.srsolarlights.com