多工位PTCR耐工频电流测试仪的研制

为满足PTCR生产中耐工频电流冲击特性测试的要求。研制了多工位PTCR耐工频电流冲击特性测试仪．在测试过程中各测试工位先通先断，保证各个工位通断电时间满足测试要求。从而保证了PTCR耐工频电流冲击性能的准确性、高效性，当PTCR样品击穿时相应测试电路具有过电流保护电路功能，自动切断回路，实现了一个保护电路对多个工位的过流保护的功能，提高了仪器本身的可靠性。

Multiple-Channel Automated Current Shock Withstanding Test for PTCR Themistor

In order to ensure the requirement of the current shock withstanding feature measurement in the PTCR producing flow, this paper has mentioned the research of multiple-channel automated current shock withstanding tester for PTCR. The circuits guarantee first-on/first-off and make sure the duration time suitable to the test requirement; When PTCR sample is shorted out, the over-current protection circuit turn off the loop automatically, and present a solution as protecting multi-channel against over-current by one protecting circuit which promote the reliability of the equipment.