Signs and instructions failed. The inspection results of the Entry-Exit Inspection and Quarantine Bureau of Yuyao show that more than half of the unqualified lamps and lanterns have mark and description problems. The main manifestations are: there are no marks on the lamps and lanterns; there are no instructions; mark numbers or letter sizes do not match; the marks lack standard provisions. Projects, etc.
There are defects in the structural design of lamps and lanterns, in particular, the relatively unqualified rate of products with relatively complex structures is relatively high. For example, the design of IP protection measures for lamps and lanterns is not in place, and the continuity of grounding appliances is not reliable.
Product consistency is not enough. For example, in the luminaires with higher IP protection level, the IP waterproof test fails due to insufficient consistency in the production, placement and embedding of the protective gasket.
According to analysis by industry insiders, the reasons for these problems are mainly due to non-standard corporate management. Judging from the situation in our city, lighting export companies are mostly small and medium-sized enterprises and their quality control and assurance capabilities are lacking. At the same time, companies do not pay enough attention to the international standards of lamps and lanterns, and many companies rely on imitation to produce them, which leads to poor product quality. Some companies have even given up quality control in order to reduce costs.
In response to the above problems, the inspection and quarantine department reminded the majority of lighting exporting companies to effectively raise awareness of quality awareness and standards, and to strengthen the ISO9001 management system and product safety certification. At the same time, strengthen communication and contact with relevant departments, pay close attention to foreign technology trade measures, and take timely response measures.
It is understood that in order to effectively improve the quality of Yuyao export lamps and continue to expand the international market, this year, inspection and quarantine departments will increase the degree of technical assistance for lighting companies, organize enterprises to conduct relevant inspection and quarantine policies and standards training, in order to strengthen the main business Responsibility awareness, enhance the ability of enterprises to organize production according to the standards of importing countries.
The physical structure of L. SYV is 100% polyethylene insulation; Sywv# for physical foam polyethylene insulated cable, foaming rate of 70-80%; L. Due to the dielectric loss, the attenuation of SYV solid cable is significantly greater than that of SYWV physical foam cable; Among the commonly used engineering cables, the physical foam cable is still the best transmission performance, the lowest price of the cable, in video, radio frequency, microwave and other bands are so. The test data given by the manufacturer also shows this; L) Library coaxial cable can be used for DC, RF and microwave frequency bands. Differentiating cables by "RF"/" video "is not only insufficient, but also misleading: it seems that solid cables must or can only be selected for video transmission. ; From an engineering perspective, it is more practical to distinguish between "solid" and "foam" cable types; L The characteristic difference between high braided (128) and low braided (64) cables: Yi Aiyi laboratory experimental research shows that in the following frequency band of 200 KHZ, the "low resistance" of high braided cables plays an important role in the shielding layer, so the low frequency transmission attenuation is less than that of low braided cables. However, in the video, RF and microwave frequencies above 200-300 KHZ, the high braided cable has lost the advantage of "low resistance" due to the "high frequency skin effect", so the two high frequency attenuation cables are basically the same.
LRM200 RF Coaxial cables,LMR400 RF Coaxial Cable,RG58 RF Coaxial Cables,LMR240 Coaxial cables,RG174 Cables
Yetnorson Antenna Co., Ltd. , https://www.yetnorson.com