This document specifies the classification, requirements, inspection methods, and qualification judgment rules for LED display screens used in sports venues. This document is applicable to LED display screens installed in sports venues, comprehensive sports venues, and swimming and diving venues, and does not include small LED electronic timing and scoring boards and signage. The display screens of other types of venues can be used as reference. Note: Without causing confusion, the term "LED display screen" in this document is abbreviated as "display screen". Normative References The content of the following documents constitutes an essential clause of this document through normative references in the text. Among them, for dated references, only the version corresponding to that date is applicable to this document; For undated references, the latest version (including all modification orders) applies to this document. GB/T 4208 Degrees of Protection Provided by Enclosures (IP Code) GB/T 20147-2006 CIE Standard Chromaticity Observer SJ/T 11141-2017 General Specification for Light Emitting Diode (LED) Display Screens SJ/T 11281-2017 Test Methods, Terms and Definitions for LED Display Screens. LED displays are devices that display text, images, and video information in LED pixels, typically including basic components such as LED screens and display control systems, It can also include auxiliary systems, etc., which can adopt an integrated or split structure
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China