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XTR111输出5V电压不稳定,变送电流也不稳定

Other Parts Discussed in Thread: XTR111

调试过程中,发现XTR111输出的5V,刚开始还稳,万用表测量是5.04V,运行一段时间 就变成了7.6V.  电流输出也不对了。将XTR111拆下之后,重新焊接又会稳定一段时间,但是还会再次发生不稳定现象。
各位工程师 帮忙指导一下啊。