[clug] [Offtopic] Mains voltage fluctuations

Peter Barker pbarker at barker.dropbear.id.au
Tue Sep 2 11:19:54 GMT 2008

On Tue, 2 Sep 2008, Michael Cohen wrote:

> We have recently used a UPS to monitor the input voltage levels - you
> can get the ups daemon to make a log file of the input voltage every
> 30 seconds and this way you have a running tally of how the voltage

Time for a new UPS, it seems.  My 11-year old-UPS doesn't do much apart 
from report loss-of-power conditions.

I'm *assuming* that the ones people are using they're using from Linux :) 
So - what are people using for UPSs now-adays?

> fluctuates during the day. If the voltage is commonly found that the
> level with no effect on the unit you can deduce that its not sensitive
> to the voltage levels.

Hmmm..  You're not the first to mention the possibility of transient line 
problems.  I kind of lean against that theory, as once the unit is 
running, it stays running.  It *may* just be more sensitive when starting 
up, but the transients would need to be pretty frequent to be so reliable 
about shutting it down.  Note again that once it is running, it stays 
running, so there must be *something* in the "more sensitive when starting 
up" thing.

> Michael.

Peter Barker                          |   Programmer,Sysadmin,Geek.
pbarker at barker.dropbear.id.au	      |   You need a bigger hammer.
:: It's a hack! Expect underscores! - Nigel Williams

More information about the linux mailing list