Battery Backup devices

  • Thread starter Thread starter George
  • Start date Start date
Martin said:
Maybe, but I've never heard of this.
We're talking a nanosecond or less, so I doubt that's the case.
Click to expand...

Follow up to what I just posted. One way to check this, as well as the
suggestions about good/bad battery, and battery connnected/charged, might
be to start with the PC off, kill AC to the UPS, and then see if the PC
will boot while the UPS is on battery.
 
David Maynard said:
Follow up to what I just posted. One way to check this, as well as the
suggestions about good/bad battery, and battery connnected/charged, might
be to start with the PC off, kill AC to the UPS, and then see if the PC
will boot while the UPS is on battery.
Click to expand...

That would be a good way to test your theory.
I still don't agree that the PSU would be that sensitive, even if the UPS
takes milliseconds to switch, but I'm willing to accept that it's possible.
I think if the PSU was some how defective and required such a " 'pure' sine
wave" to work, the OP would be having problems more often than just when the
power goes out completely.


I'm pretty sure that either his batteries are dead (not likely in both units
though), or he didn't connect them properly.
Of course I could be wrong, as I'm not an "electrical engineer" like Mr.
w_tom. ;-) ;)
 
Martin said:
That would be a good way to test your theory.
I still don't agree that the PSU would be that sensitive, even if the UPS
takes milliseconds to switch, but I'm willing to accept that it's possible.
I think if the PSU was some how defective and required such a " 'pure' sine
wave" to work, the OP would be having problems more often than just when the
power goes out completely.
Click to expand...

I understand your skepticism and I would have felt similar if I hadn't seen
some Compaq Prolinea machines behave this very way. They would run on
either AC or battery but reboot during an AC to battery power transfer.
Switching to a pure sine UPS solved it.

There could have been some other 'unknown' factor but a full forensic
analysis was less important than getting it operational and the stepped
sine was the best theory we could come up with at the time.

I'm pretty sure that either his batteries are dead (not likely in both units
though), or he didn't connect them properly.
Click to expand...

When it's impossible to 'see' and check it for one's self that's a
perfectly logical theory.
 
David Maynard said:
I understand your skepticism and I would have felt similar if I hadn't
seen some Compaq Prolinea machines behave this very way. They would run on
either AC or battery but reboot during an AC to battery power transfer.
Switching to a pure sine UPS solved it.
Click to expand...

I believe that you've seen it, and I will remeber this thread if ever I run
into a similar problem.

There could have been some other 'unknown' factor but a full forensic
analysis was less important than getting it operational and the stepped
sine was the best theory we could come up with at the time.



When it's impossible to 'see' and check it for one's self that's a
perfectly logical theory.
Click to expand...

Yes, since we are unable to see it ourselves it does make it difficult to
know for sure.
 
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