What about using a few mains>>9V transformers. Then you can common the secondaries. Sure, they'll all be phase shifted, but you should be able to see what's going on, and I think you'll see spikes or whatever in the waveform with a cutoff at about 400Hz.
Regards Roland On 15 March 2011 20:16, Kirk Wallace <kwall...@wallacecompany.com> wrote: > In order to investigate three phase issues more, it would be nice to > measure at least two waves at a time. I have a two channel scope, but > the channels are ground referenced. I can float the scope, but I think > this will only allow me to measure one signal, or two if they happen to > have the same reference point. Plus I don't think floating the scope is > the safest practice for me or the scope. What might be good is to have a > box that floats like a DVM but can feed a scope channel. What sort of > keywords should I use to find such a thing, or is there a better way? > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
