Zhuhai Chang Electric Co., Ltd., is a development, scientific research, production and sales of electrical testing equipment for the integration of science and technology enterprises. The production of MVC-385-type vacuum tester, a leading technology, a real and effective measurement of the vacuum content. Issued by the Xi'an High Technology Institute test report, in full compliance with technical requirements. 
 MVC-385-type vacuum tube tester with a 35 curve, covering 201 kinds of tube can be a real measure of the domestic and virtually all of the vacuum within the vacuum bubble content, at present, have an impact on the domestic power supply bureau and other units of Power Plant such as the Three Gorges Power Plant, Hefei, Anhui Electric Power Research Institute experimental, pilot of the Hunan Province, Daqing Petroleum Administration Bureau and other MVC have adopted our products. Our country has modeled appearance and technology equipment, and forged inspection certificate, please identify the authenticity of the user attention! The third time in 2006 to upgrade the equipment, the upgraded device has a voltage regulator button to test the various models 6KV-35KV vacuum switch, breaking the more traditional measure only 10KV vacuum switch technology. Miniature printer, makes the instrument more beautiful and easier to use. 
 Our safe and reliable equipment, automatic protection, automatic discharge, the test speed. Instrument light beautiful, strong and durable, in Yunnan, there was no damage after long-distance transport. Annual sales up to a hundred units. The company technical staff was breaking vacuum tester conventional development model, the new will be smaller, wireless loop measurement is the testing stage. 
 Features and Specifications: 
 1. Built-in almost all domestic vacuum interrupter measurement curve, you can measure all types of vacuum circuit breakers 
 2. Ionized charge sampling, two steps of adjustable high voltage can be measured 6KV-35KV vacuum circuit breakers for each model. 
 3. Discriminant completely leak vacuum interrupter, and security features self-test is reliable, auto-complete discharge. 
 4. Detachable coils surrounding the measure, to facilitate safe and reliable 
 5. Measurement range :10-5 --- 10-1Pa 
 6. Measurement error :10-4 --- 10-1Pa error of <10% 
 7. Measurement resolution :10-5 Pa 
 8. Leakage interrupter electrical breakdown will occur in the measurement, the unit is protected. 
 9. To allow the ambient temperature: -20 ℃ - 50 ℃, as in the first test below 0 ℃ for 20 minutes before the machine electricity use. 
 10. Air humidity: <85% RH 
 11. Input Power: AC220 ± 10% 50/60HZ 
 12. Overall dimensions: 350 * 320 * 225mm