Hi group,
About an hear ago, I saw a portable (battery operated) 2 channel scope for approx $120-$200 (depending on max bandwidth) and bought one. ? While I never work on mains voltage, I figured it would be nice to have such unit just in case I ever get
the urge (to probe a 120v device). ?And sure enough I later decided I want to see the voltage wave form out of my battery backup UPS device.
But ¡. What is the industry opinion on using a portable ?/ floating (DMM style) scopes on mains voltage ?? ? Is it considered just as safe as using HV differential probes ??
Jong?
P.s. ? about my battery backup UPS - crappy waveform output. ?Luckily all my devices connected to it uses some form of switching power supply, so I¡¯m hoping that¡¯s good enough to undo the evils of ¡°modified¡± sine wave?
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On Nov 26, 2024, at 8:10 PM, Kerim via groups.io <ahumanbeing2000@...> wrote:
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On Wed, Nov 27, 2024 at 02:38 AM, wn4isx wrote:
Is An Isolation Transformer A Safety Measure Or Death Trap?
My isolation transformer (500W) was and still is indeed a safety measure for me since many decades ago. Most of my designs are related, in one way or another, to the mains voltage (220V, 50Hz).
I also added a 2A fuse at its output, just in case of a short circuit.
?
The other measure of safety, I was fortunate to have (around 15 years ago), is a digital scope whose two channel grounds are isolated.??
?
