The inspection of wires and cables has always been an important part of the national standard wires and cables. The more advanced the quality inspection department within a wire and cable enterprise, the better the quality of the wires and cables produced by the enterprise and the more trustworthy they are. The stricter the third-party quality inspection department, the more conducive it is to the development of this industry
Measurement of DC resistance of wires
The conductive cores of wires and cables mainly transmit electrical energy or signals.
. The resistance of a wire is the main indicator of its electrical performance. Under the action of AC voltage, the resistance of the wire core is larger due to the skin effect and proximity effect surface than under the action of DC voltage. However, at an electrical frequency of 50Hz, the difference between the two is very small. According to current standards, only the DC resistance or resistivity of the wire core can be tested to see if it exceeds the specified values. Through this inspection, certain defects in the production process can be found, If the wire is broken or some single wires are broken; The cross-section of the wire does not meet the standard; The length of the product is incorrect, etcInsulation resistance detection
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