Direct acting analog indicating electrical measuring instruments and their accessories - Part 9: Recommended test methods - Scope 1: This part of GB/T 7676 specifies the general test conditions and methods for direct acting analog indicating electrical measuring instruments and their accessories. To make the experiment simpler and/or more accurate, these recommended test methods do not limit the use of special test methods and/or special test devices. This section is applicable to electrical measurement indicating instruments that directly act on analog indications, such as ammeters and voltmeters—— Power meters and reactive power meters; - Pointer and vibrating spring frequency meters- Phase meter, power factor meter, and synchronization indicator- Resistance meter (impedance meter) and conductivity meter—— The above form of multifunctional instrument. This section also applies to certain limited interchangeable accessories or interchangeable accessories used in conjunction with the aforementioned instruments, such as: - diverters; - Series resistors and impedors; - Hall current sensor- Hall voltage sensor; Electronic converter
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