UL is American Underwriters Laboratories (Underwriter Laboratories Inc.)abbreviation. UL safety test is USA most has the authority, is engaged in safetytesting and identification of the larger non-governmental organizations. It is a professional organization for public safety do test an independent, non-profit. Ituses scientific test method to study a variety of materials, determine the device,products, equipment, buildings have no harm and harm degree of the life,property; determine, write, and issue the corresponding standards and help to reduce and prevent the loss of life and property caused by data, and carry outthe truth research business.
Logo introduction
UL safety certification and safety operation certificate business is mainly engaged in the product, and its ultimate aim is to market with a security level of commodities, guaranteed to make contributions to the health of human body and property safety. The product safety certification as an effective means toeliminate technical barriers in international trade, UL to promote the development of international trade can also play a positive role. UL was founded in 1894, the initial stage of UL mainly depends on the fire insurance departments to providefunds to maintain the action, until 1916, UL was completely independent. After nearly 100 years of development, UL has become has the world famous certification body, which has its own a set of strict management system,standards development and product certification program. Council ofmanagement of UL by a security experts, government officials, consumers,education, utilities, insurance industry and standards of composition, daily workby the president, vice president, treatment. At present, UL has five laboratories in the America native, is headquartered in Chicago in the northern town of Northbrook, at the same time set up a corresponding laboratory in Taiwan andHongkong. In USA, for consumers, UL is the safety mark symbol, global ULmanufacturers, is the most trusted conformity assessment providers.
The symbol style
UL signs are usually identified in the product and (or) product packaging, used to indicate that the products have passed the UL certification, in compliance with safety standards.
The use requirements
The minimum height of 1 registered trademarks should be 3/64 inches.
2 when the UL marking the outer circle diameter of less than 3/8 inch, the registered trademark symbol if the naked eye not legible under negligible.
3 marked by pressing, moulding, Mo Yin, screen printing or similar method of direct and fixed at constant product.
Get 4 marks: manufacturers can be reproduced or obtained from the ULauthorized dealer.
The 5.ULus logo (only us, not c): safety signs products to enter the Americanmarket; cUL (only C, not us): safety signs products entering the Canadian market; cULus mark: safety signs products to enter the market and the Canadian market USA
Service project
Types of product certification and testing of UL service can be divided intocolumn names, recognition and classification.
The 1 column (LISTED):
Generally speaking, the column name is only applicable to complete product andqualified personnel to replace or install various devices and device at the scene,a variety of products belonging to the UL listing service include: household appliances, various types of electrical products medical equipment, computerand business equipment and buildings in the role, such as distribution system,fuse, electric wire, switch and other electrical components. The UL listedproducts, listing mark can usually be in each product superscript UL. Listing markusage.
2 Accreditation (Recognized):
Accreditation service is a project of the UL service, the identification of theproducts only in UL listed, grade or other approved products as components, the use of raw materials. Product approved in the structure is not complete, or in usewith certain restrictions in order to ensure the expected safety performance. In most cases, accreditation of product tracking service belongs to R class.Approved products belong to L class electronic line (AVLV2), wire harnessprocessing (ZKLU2), (ZPFW2), aluminum (DVVR2), and the metal flexible tube(DXUZ2). Approved products with marking requirements.
3 grade (Classification):
Grading service only to evaluate the specific hazards of products, or otherstandard except for implementation of UL standards (including the internationallyrecognized standards, such as IEC and ISO standards) for evaluation of theproduct. Generally most grade products are not consumers use the product, but the industrial or commercial use of the products. Hierarchical UL mark indicates that the product is in the range of certain restrictions and regulations after ULidentification. For example, for industrial use solvents such chemicals, only to evaluate their possible achieving the ignition temperature of fire this range.Some products grading services and listing service the same, but generally onlyon a particular aspect of the product or some aspects of evaluation, such as in the United States, medical X - ray diagnosis instrument of this kind of equipmentto comply with the relevant national law of the United States and radiation emission and beam precision regulation, but because UL only the X ray as the classification of products. So only these aspects of its mechanical properties,electrical properties and other non radiative properties.
4 multiple listing, recognition or multiple service multiple classification:
When a UL applicant in obtaining the column names, recognition or classificationof service, its product to another company in the name of production to meet theneeds of the sales, can apply for a multiple listing, recognition or multiple classification of multiple services, in this case, get another company listing,recognition or classification manufacturers were allows the use of product list in the name, but the product of the company code, product code or UL companies that can