**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 should be carried out to keep the equipment in optimal working order. Personnel responsible for managing the instrument must have a thorough understanding of its performance and operational procedures. They should also maintain detailed technical records and store all related documentation and user manuals properly.
The instrument should always be kept clean and free from dust or debris. If any malfunction or abnormality occurs during operation, do not attempt to repair it on your own. Instead, contact our company via phone and follow the guidance of our trained technicians for any necessary repairs or adjustments.
**Second, Purpose of the Helmet Lateral Rigidity Tester**
The helmet lateral rigidity tester is primarily used to evaluate the lateral rigidity of hard hats. This test ensures that the helmet can withstand lateral forces without excessive deformation, which is critical for user safety.
**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 for smooth and precise lifting and dropping, making the operation simple and efficient.
3. A high-precision pressure sensor is integrated to display the applied force and automatically record the maximum force value.
4. An electronic ruler with 0.1 mm resolution is used to measure the test distance accurately, meeting all standard requirements.
5. The displacement range is up to 230 mm (with 1 mm accuracy), and the force range reaches 750 N, ensuring full compliance with testing standards.
6. The device can automatically set time with an accuracy of 0.1 seconds.
**Fourth, Operation Precautions for the Helmet Lateral Stiffness Tester**
Before using the tester, operators must carefully read the user manual and fully understand the equipment’s functions and operation procedures. The power supply is single-phase AC, and a reliable grounding connection is required to prevent electrical hazards.
During testing, the instrument casing must be level and stable. Smoking is strictly prohibited in the area where the equipment is stored, and fire extinguishing equipment such as carbon dioxide should be available. Operators must wear protective clothing and gloves throughout the process to avoid injuries.
The testing machine is equipped with an electronic ruler and a lower limit warning system. If the lever triggers a buzzer alarm, stop immediately and reverse the lever to protect the measuring device. Adjust the upper and lower limits if necessary.
**Fifth, Preparation Before the Test**
1. Prepare a hard hat sample for testing.
2. Ensure all required tools and materials are ready before starting the test.
**Sixth, Operating Instructions for the Safety Helmet Lateral Rigidity Tester**
Turn on the power and allow the instrument to warm up for 10 minutes. Before each test, reset the force value and ensure the device is ready for use.
The length display shows 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 a suitable height, then place the helmet between the two plates, ensuring the brim is as close to the plate as possible.
Gently turn the lever to apply pressure to the helmet, exerting a vertical force of 30 N. Press the “Time Start†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, holding for another 30 seconds and recording the distance as Y2.
Reduce the load back to 25 N at 100 N/min, then quickly increase it to 30 N and hold for 30 seconds. Record the distance as Y3. Press the “Timer Stop†button to clear the timer. 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 1 mm. After completing the test, repeat the process if needed. If no further tests are required, turn off the power and unplug the device.
**Seventh, Determining Whether the Helmet Meets Lateral Rigidity Standards**
According to GB2811-2007, a helmet is considered qualified if:
- The maximum deformation (Y2 - Y1) does not exceed 40 mm.
- The residual deformation (Y3 - Y1) does not exceed 15 mm.
- The cap shell does not show any signs of cracking or fragmenting.
If any of these criteria are not met, the helmet is deemedä¸åˆæ ¼ (unqualified).
Garden Lights,Garden Lights Outdoor,Garden Lights Solar
China Searun Solar Solution Co., Ltd. , https://www.srsolarlights.com