Cơ khí luyến yến

[Tuấn]

em thấy ở trang này http://www.ebay.com/itm/digitizing-p...-/160763530758

nó rao bán cái này :



và nó bẩu dư lày :

It is rated for 10 million samples (switch operations) before carbon build up

· The biggest problem with almost all ball and rod contact based probes is that after 100,000 samples (that's 100,000 switch operations) the contact resistance would increase because of carbon buildup. So much that the op amp circuit would start to fail to switch its output state. The contacts don't wipe (self-clean) and a buildup of carbon occurs. This would result in having taking the probe apart and clean it.

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