BAIJIAN - Third party testing organization
Insulation resistance inspection
Insulation resistance inspection refers to the resistance value displayed by applying voltage to the insulation part of a connector、 resulting in leakage current on the surface or inside of the insulation part. Insulation resistance (M Ω)=voltage applied to the insulator (V)/leakage current（ μ A) . The heat and DC electrolysis generated by excessive leakage current generated by low insulation resistance will cause insulation damage or deteriorate the electrical performance of the connector
Dielectric withstand voltage test
Dielectric withstand voltage test、 also known as dielectric strength test.
. It refers to the specified voltage between the contact and contact parts of the connector、 between the contact and the shell、 within a specified period of time、 in order to determine whether the connector can work safely under the rated voltage、 whether it can withstand overvoltage caused by switching surges and other similar phenomena、 and evaluate whether the insulation material or insulation gap of the electrical connector is qualified From the analysis of the mechanism of AC withstand voltage breakdown、 breakdown is mainly caused by leakage、 that is、 if the leakage current exceeds the specified value、 it is considered breakdown. Generally、 electrical connector technology should follow the national standard GJ1217-91、 and there should be no breakdown、 flashover、 or discharge phenomenon after applying the voltage to the specified value for 1 minuteContact resistance inspection
Contact resistance inspection is to determine the resistance generated when current flows through the contact surface of the contact.
. When a large current passes through a high resistance contact、 there is a possibility of excessive energy consumption and dangerous overheating caused by electric shock. In many applications、 the contact resistance needs to be low and stable、 so that the voltage drop on the contact does not affect the accuracy of the circuit When measuring contact resistance in practice、 a contact resistance tester (milliohmmeter) designed according to the principle of the Kelvin bridge four terminal method is often used. The actual total contact resistance R can be written as an expression: R=R ₁+R ₂+R Å (R ₁ is the concentrated resistance、 R ₂ is the film resistance、 and R Å is the conductor resistance)In addition to using a milliohmmeter、 the voltammetry and ampere potentiometer methods can also be used to measure contact resistance
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 problemsinspection 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