Re: Measurement Techniques without Earth Grounding an Offline smps
- From: D from BC <myrealaddress@xxxxxxxxx>
- Date: Wed, 21 Feb 2007 10:22:20 GMT
On Wed, 21 Feb 2007 10:34:33 +0100, "Frithiof Andreas Jensen"
<frithiof.jensen@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
"D from BC" <myrealaddress@xxxxxxxxx> wrote in message
news:hbtnt257vek1ent6g8fqkepaufat6fki03@xxxxxxxxxx
I'm thinking about methods to test a non-isolated homebrew 130W
offline smps.
I need to detect RF bursts "birdies", ringing, spikes and overshoots.
An earth grounded scope will blow a fuse.
It will not if you use an isolation transformer!
Otherwise you are stuck with differential measurements, which suck because you
use two channels on the scope for each trace.
I only have a single channel scope.
The challenge is making measurements and test techniques without a
isolation transformer nor an isolated scope to detect RF bursts
"birdies", ringing, spikes and overshoots.
I suspect it's a little bit like making radio tuner/demodulator ccts
and measuring a DC out with a DMM.
D from BC
.
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