🚀 go-pugleaf

cs000rjp@selway.umt.edu (Russell J. Pagenkopf) writes:

> Hi! I have a sealed power supply that I need to test for voltage and
> amperage under load and this is my problem, how do I create a 2 amp load?
> The power supply uses 120VAC 0.40A grounded and outputs (supposedly) 20V,
> 2.0A, 40VA Class 2  with four pins ( I have no idea what pins do what yet). I
> understand that if I place my meter in series between the load and the
> power supply, I should be able to read 20V (dc right?) and 2.0 amps. But
> what does the 40va mean? 40VAC? I guess what this comes down to is, how
> should I test this thing to make sure it is giving me what it should?
>
> Thanks for any help and sorry for wandering ;-).
>
> --
>   Russ Pagenkopf                                cs000rjp@selway.umt.edu
>  School of Journalism, University of Montana         cs__rjp@lewis.umt.edu
> <There is no other wisdom, and no other hope for us but that we grow wise.>
Salut!

Have you tried lamps in series and parallel for a load?  40VA means
40VoltAmps, just what you would expect from 20V * 2A.  If you place
your meter in series with the load and source, you should measure
Amps.  If your meter is parallel the load, you should measure Volts.
All readings on the output should be DC (only a scope knows for sure
8-).

Regards,
Magus.
-- If I already posted this, file this one under _old timers_ disease. --
--              magus@brewhau.bison.mb.ca (James Copland)              --