This standard specifies the classification, technical requirements, test methods, inspection rules, and other contents of teaching power supplies. This standard is applicable to power supplies used in grouping and demonstration experiments in middle school teaching. 2. The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication of this standard, all versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. JY 0001-88 General Quality Requirements for Teaching Instrument Products JY 0002-88 Inspection Rules for Teaching Instrument Products JY 0o09-90 Environmental Requirements and Test Methods for Teaching Electronic Instruments JY 0010-90 General Technical Conditions for Marking, Instructions, Packaging, Transportation, and Storage of Teaching Electronic Instruments 3 Classification and Naming 3.1 Classification: According to the product structure, it is divided into main power supply and discrete power supply, and according to the purpose, it is divided into teaching power supply and student power supply, According to the applicable objects, it is divided into high school power supplies and middle school power supplies. 3.2 Model a. Classification code: DY. b. Product name: determined based on structure, purpose, object, etc. c. Feature code: Voltage stabilized WY, DC ZL, AC JL. d. Specification: Determined based on the maximum output voltage and current. If there is a voltage regulator, it is determined according to the maximum voltage regulator value. If there is no voltage regulator, it is determined according to the maximum DC output value, and so on. 3.3 Model Example High School Teaching Power Supply DY-GJ-WY-24/2 Middle School Teaching Power Supply DY-CJ-wY-12/2 High School Student Power Supply DY-GX-WY-16/2 Middle School Student Power Supply DY-CX-wY-9/1.5 High School Teaching Safety Main Power Supply DY-GAZ-WY-24/2.16/2 Middle School Teaching Safety Main Power Supply DY-CAZ-WY-12/2.9/1.5
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