| ??? 05/31/08 08:45 Modified: 05/31/08 08:47 Read: times |
#155318 - ANY certificate is NO absolute guarantee... Responding to: ???'s previous message |
...that EMI sufficiently strong to throw the micro out of way, never occurs.
Kai Klaas said:
The watchdog is not to cure a misdesign (lack of filtering, etc.), but to handle unforseeable situations which overcome all these barriers. And how did you come to the conclusion that Alex's case is not due to unforeseeable situations? Kai Klaas said:
Why is the power unstable? Ask the utility (electricity) provider. You cannot simply say "power dropouts shall not occur" if they DO occur in certain regions. You have a slightly different perspective: in Germany you have a substantially more stable and controlled utility grid than say here in Slovakia; and also it's less likely to have strong EMI injected into the grid by faulty devices. AFAIK, even the CE testing does not check for possibly excessive radiated and conducted interference which certain devices might start to emit when mains is out of bounds, or a series of rapid on/off cycles occur, or when the grid suffers severe overvoltage during a thunderstorm. JW <shameless self-advertisement>A few thoughts about WD, although no particular solution, in the reset document</shameless self-advertisement> |
