The grounding resistance measuring instrument is a resistance measuring device used for measuring the grounding resistance of various devices and measuring the resistance value of low resistance conductors in departments such as power, postal and telecommunications, railways, communication, mining, etc; It can also measure soil resistivity and ground voltage. Working principle: The grounding resistance measuring instrument abandons the traditional manual power generation method and adopts medium to large-scale integrated circuits. It combines the three terminal and four terminal measurement methods using DC/AC conversion technology to form a new type of grounding resistance measuring instrument. The working principle is that the DC/AC converter inside the machine converts DC into AC low-frequency constant current, which forms a circuit through the auxiliary grounding electrode C and the measured object E. The AC voltage drop is generated on the measured object, which is amplified by the AC amplifier through the auxiliary grounding electrode P, and then sent to the meter head for display through detection. With the help of a multiplier switch, three different limit values can be obtained: 0-2 Ω, 0-20 Ω, and 0-200 Ω
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