EVP Durability Testing System The EVP durability testing system is for the vacuum durability test of the EVP (Electric Vacuum Pump) by measuring relationship between time and pressure in the specific volume. Totally, 12 specimens will be tested at the same time. The system is composed by a chamber, power supply, and control system. The measuring signals are pressure, voltage, current, and etc. and system will be operated by the prebuilt profile. The user can make the general test profile and modify saved profile from the software.

Fig. 1 EVP durability Test System Overview Fig 1 is the system’s overview. The system is composed by the rack which contains the controller and user interface PC, the power supply which supplies appropriate power to the specimen, and the environmental chamber which supports environmental condition to the specimen. The chamber is a main frame and the test utilities will be set up at the chamber. Basically, the system has real time measuring function of the vacuum pressure, voltage, current signals from the specimen. The system’s specification is shown at the Table 1. The each specimen has an independent...

Fig. 2 EVP durability Test System utility layout and picture Fig 2 and 3 explain the vacuum system. Solenoid for destroying the internal vacuum is equipped for chamber temperature and can be monitored at the each channel for the repeating durability test. Also, control system by real time. The communication each channel has vacuum filter for filtering the air between chamber and controller uses RS-232 from outside. To control the intake air flow, an protocol. The operating and controlling temperature orifice is equipped between the filter and reservoir. are possible from the user interface PC....

Fig. 4 EVP durability Test System Software Fig 4 is software’s screen capture. Independent and During the test, each specimen cab be monitored, Integration test are possible by the software. In the and by inputting the fault value, the system can middle of screen, the user can monitor all 12 decide right or wrong. specimens’ real time performance which contains During the test, each specimen cab be monitored, current value, vacuum pressure, and the test cycle and by inputting the fault value, the system can count. The durability test is linked with temperature decide right or wrong. change and...