Re: Powersupply testing
"Josef Hartmut" <call_0815_4711@gmx.at>
2007-01-29 01:11:54
Uriah wrote:
> I have the manual but it is from an Asian company and there is very
> little to it as far as examples on how to set it up.
> 
> It doesn't have a reactance setting.  I just wasn't sure how to
> factor
> that in when setting the resistance or if you need to consider that
> when working on an embedded style controller.
> 
> It didn't cost that much.  Around $450.00?

That's not much :-)

> The adjustables are Resistance, Current, Watts
> So I think I need to set the resistance that compares with the board
> the PS ususally is plugged into.  So I just measure the resistance
> with my meter for the 12, 5, -5, 3.3VDC?  I get quite a difference.
> Is that the correct way for the resistance?

No. You want to measure the peak current during startup on each 
channel using a storage scope and then add 5% to it. Use this current 
to calculate the resistance using ohm's law.
> I figure you just set the
> amps to what ever the PS is rated for. Or at least close to it?

A few percent higher, if possible and not hard limited.

> Then
> there is watts.  Do I just leave that alone or set that set the
> Watts
> and leave the amps at 0?

I don't know the device. I only know you should polish your 
electrotechnical basics :-)

-- 
Joe 

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