How to do the test report? Why do you need to do product inspection? Third-party testing institutions provide product testing services in various industries, and there are many cooperative laboratories across the country, mainly serving companies, enterprises, individual businesses, universities and scientific research.
Testing process
1, sending samples
2, checking requirements
3, targeted quotation
4, both parties determine, sign a contract, start
the experiment5, complete the experiment: the testing cycle (can be expedited) will be changed according to the sample and its testing items / methods, you can consult the engineer
6, issue a test report, and provide post-service.
Refrigerators are common white goods, and almost every household has a refrigerator. So, after prolonged use, problems with the refrigerator are inevitable. Do you know what are the common problems with refrigerators? If we can check what the problem is ourselves, repairing the refrigerator will become easier. In this issue, the editor is going to introduce common problem detection methods for refrigerators. Go and learn them now 1. If the temperature controller or main control board malfunctions, adjust the temperature control gear to the appropriate gear. If the refrigerator starts for a short time, check if the back evaporator temperature reaches the shutdown temperature. If the shutdown temperature cannot be reached, it should be a problem with the temperature controller. If the shutdown temperature is reached, it may be due to compressor overheating protection or other faults. If the sensor is normal and the startup time is short, resulting in poor cooling, It can be determined that it is a problem with the main control board Secondly, if the compressor is normal, it can be determined that there is a refrigerant leak. Check the leak point, focusing on the electromagnetic valve (which can be placed in warm water for more accurate leak detection) and the frozen lock ring to prevent internal leakage Thirdly, if the ambient temperature is too low or the temperature of the item is below 16 degrees, it is necessary to turn on the low temperature compensation switch and turn it on without heating. Follow the detection method in the mechanical refrigerator not starting to check the heating wire and magnetic temperature switch. The heating wire and magnetic temperature switch are normal but there is no voltage input, which can be determined as a main control board fault or circuit fault. If it is below 3 degrees or even 0 degrees, please consult the user to increase the ambient temperature. Check if there is too much food placed, especially if the horizontal freezer does not exceed the food line. The product should not be exposed to direct sunlight, and the ventilation should be good. The heat dissipation back and side panels should be kept at least 10 centimeters away from the wall 4. Compressor exhaust difference. Open the refrigerator system and check if the compressor exhaust is normal. The simple method is to use your fingers to see if the compressor exhaust port can be blocked. If the volume is blocked, the compressor exhaust difference can be determined. If it is difficult to block, the second method needs to be used to further determine. One method is to connect a pressure gauge at the outlet of the condenser to check if the exhaust pressure can exceed 1.5Mpa and the gauge needle slowly retracts after power failure. If it cannot reach 1.5Mpa or even 1.5Mpa, it can be determined that the compressor has insufficient exhaust. If the gauge needle quickly retracts, it indicates that the compressor has gas leakage
The above article is a partial list. For more testing needs and details, please consult the online consultant of the free consulting agency: 15201733840 (phone and WeChat), and conduct testing on the top 100 inspection websites. Issuing authoritative testing reports has legal effect
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 problems100% inspection 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 ChinaDetection and testing characteristics:
1. Full coverage of the testing industry to meet different tests;
2. Full coverage of laboratories, local testing nearby;
3. One-to-one service of engineers to make the detection more accurate
4. Free initial inspection, no testing fee is charged for initial inspection
5. Self-service order Express free door-to-door sampling;
6. The cycle is short, the cost is low, and the service is considerate;
7. Authoritative qualifications such as CMA, CNAS, CAL, etc.;
8. The test report is authoritative and effective