Electromagnetic Compatibility (EMC) Testing

According to different usage scenarios, fitness equipment is divided into three grades: H, S, and I. Class H represents the household - use grade, that is, the product is used indoors at home. Class S represents the professional/commercial grade, that is, the product is used in public places such as sports associations, educational institutions, hotels, clubs, and studios. Class I also represents the professional/commercial grade. In addition to the applicable scenarios of Class S, the product is also provided for special groups, such as nursing homes and rehabilitation hospitals.

According to the level of numerical display accuracy, it is divided into three levels: A, B, and C. Generally, products are equipped with instrument panels to display parameters such as speed, heart rate, distance, power, and calories. According to the accuracy of these parameter displays, the highest - precision ones are of Class A, the medium - precision ones are of Class B, and the lowest - precision ones are of Class C. If there is no instrument panel, it corresponds to Class C. Some specific products have relevant testing requirements according to the accuracy level. When the display accuracy is uncertain, it is preferred to claim a Class C accuracy level.

During testing, it is necessary to simulate the actual use state. The results of use by people of different weights vary, and the loads applied during static and dynamic load tests are related to the weight of the maximum - weight user. Therefore, providing the weight of the maximum - weight user can ensure the smooth progress of the test. In addition, if the claimed weight of the maximum - weight user is less than 100 kg and this weight is required for testing, the standard stipulates that 100 kg should be used for testing.

During the use, movement, and folding of the product, it is necessary to avoid causing damage to the user or others. The main objects to be evaluated for potential harm include the fingers of adults, the fingers, palms, and soles of children. Therefore, when designing and manufacturing products, measures should be taken to avoid harm to these body parts. (Attention should be paid to the corresponding sizes of product structure gaps: the default size of an adult finger is 9.5 mm, that of a child's finger is 8.6 mm, that of a palm is 25 mm, and that of a sole is 60 mm.)

Fitness equipment is used for fitness. There may be over - use during the process. Therefore, products need to have a high safety factor. The load safety factor specified in the standard for the static load test is 2.5. In the laboratory, during the static load test, a load 2.5 times the weight of the maximum - weight user is applied to the product for testing. If the product tilts during use, it will not cause the user to tip over. If the product does not tip over when used on a 10° inclined surface, it helps to improve the safety of the product when used on a flat surface. The 10° can be understood as the safety factor defined by the standard.