This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of switching power supplies for microcomputer system equipment. This standard is applicable to switching power supplies (usually referred to as switching power supplies) for micro and small computer system equipment, and serves as the basis for formulating product standards. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 191-2008 Graphical Symbols for Packaging, Storage and Transport (ISO 780:1997, MODGB/T 2421 Environmental Testing of Electrical and Electronic Products Part 1: General (GB/T 2421-1999. eqv IEC 60068-11988) GB/T 2422 Environmental Testing of Electrical and Electronic Products, Terminology (GB/T 2422-1995, eqv IEC 60068-5-2:1990) GB/T 2423.1-2001 Environmental Testing of Electrical and Electronic Products Part 2: Testing Method EC60068-2-Unrecognized Result 1:199o, IDT) GB/T 2423.2-2001 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods: Test B: High Temperature (IEC 60068-2-2:1974. IDT) GB/T 2423.3-2006 Environmental Testing for Electrical and Electronic Products - Part 2; Test Method Test Cab: Constant Damp Heat Test (IEC 60068-2-78:2001, IDT) GB/T 2423.5-1995 Environmental Testing for Electrical and Electronic Products, Part 2: Test Methods: Test Ea and Guidelines: Impact (idt IEC 60068-2-27:1987) GB/T 2423.6-1995 Environmental Testing for Electrical and Electronic Products, Part 2: Test Methods, Test Eb and Guidelines: Collision (idt IEC 60068-2-29:1987) GB/T 2423.10-2008 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods, Test Fc: Vibration (Sine) (IEC 60068-2-6:1995, IDT) GB/T 4857.5-1992 Packaging and Transport Package Drop Test Method (eqv ISO 2248:1985) GB4943-2001 Safety of Information Technology Equipment (eqv 1EC 60950: 1999) GB/T 5080.7-1986 Equipment Reliability Testing: Verification Test Plan for Failure Rate and Mean Time Between Failures under the Assumption of Constant Failure Rate (idt IEC 60605-7: 1978) GB/T 5271.14-2008 Information Technology, Vocabulary: Part 14: Reliability, Maintainability, and Availability (ISO/IEC 2382-14; 1997,1DT)
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