[Nut-upsuser] problem with output voltage on a mustek ups

Carlos Rodrigues carlos.efr at mail.telepac.pt
Sat Mar 8 22:13:26 UTC 2008

On Fri, Mar 7, 2008 at 11:15 AM, Pedro Mendes Jorge <pmjorge at lip.pt> wrote:
>  >>  This output voltage is too low! I  think power spikes may be better
>  >>  than using this voltage.
>  >
>  > Is this indicated by the UPS, or did you measure this voltage externally?
>  >
>  > Arjen has mentioned this before, but the values returned by UPSes are
>  > generally not calibrated.
>  >
>  It is returned by the UPS. But again, I sometimes have an output voltage
>  of ~225V when it is not trimming.
>  I could try and measure the "real one", but following Arjen's advice I
>  won't waste my time, nor someone else's time (yours).

I used to have a Mustek UPS (600VA). The voltage readings it reported
were off by 12~15V. When on line power it reported too much voltage,
and when on battery it reported too low a voltage. This comparing to
the values read with a voltimeter.

Don't sweat it. Cheap hardware has downsides...

Carlos Rodrigues

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