[TechAssist] Re: Isolation transformer question
- From: "Minesafe" <minesafe@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 4 Feb 2002 12:00:02 -0600
I am grateful for the patient answers.
Jim
minesafe@xxxxxxxx
MineSafe Electronics
Contributing to safe mining since 1975
----- Original Message -----
From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, February 04, 2002 11:51 AM
Subject: [TechAssist] Re: Isolation transformer question
>
> I can't believe this thread has gone on as long as it has. Am I to
understand
> that there are technicians out there that are confused about the usage of
this
> instrument. Geez I used isolation transformers since the cheapie series
string
> filament televisions of the mid 60's. This is nothing new guys.
> You always isolate the TV!
>
> Jim Myers wrote:
>
> > The scope is not what should be isolated, the unit under t.e.s.t. is
what
> > should be isolated. The UUT should be isolated from scope, soldering
iron,
> > etc.
> > Jim Myers
> > jr.myers@xxxxxxxxxxx
> > ----- Original Message -----
> > From: "Minesafe" <minesafe@xxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, February 04, 2002 10:33 AM
> > Subject: [TechAssist] Re: Isolation transformer question
> >
> > We have all our scopes on their own iso transformers. But we had to cut
all
> > the grounding pins off the plugs. Why do they make an isolation
transformer
> > and then give it a common ground through the ground pin on the three
wire
> > line cord?
> >
> > Jim
> >
> > minesafe@xxxxxxxx
> > MineSafe Electronics
> > Contributing to safe mining since 1975
> > ----- Original Message -----
> > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, February 03, 2002 2:37 PM
> > Subject: [TechAssist] Re: Isolation transformer question
> >
> > >
> > > Thanks to everyone for their input on this.
> > > I appreciate it. Mine has only two outlets, both are protected.
> > > Jeff
> > >
> > > FAX 1-413-280-0677
> > > Jeff Dougherty
> > > Intrepid Video & Electronics
> > > 501 Luther Rd
> > > Harrisburg, PA 17111
> > > 717-909-8844
> > > VCR tips, electronics info & general interest.
> > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> > >
> > >
> > > ----- Original Message -----
> > > From: "MikE" <patsvcr1@xxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Sunday, February 03, 2002 11:45 AM
> > > Subject: [TechAssist] Re: Isolation transformer question
> > >
> > >
> > > >
> > > > ALSO - be certain not to plug your scope (or
> > > > other test eqpt) into non-isolated outlets
> > > > and use while using the
> > > > iso-xfmr ... most test gear has three wire
> > > > ac cords which can lead to unexpected smoke
> > > > .... MikE
> > > >
> > > > -----Original Message-----
> > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On
> > > > Behalf Of Damon
> > > > Sent: Saturday, February 02, 2002 2:48 PM
> > > > To: techassist@xxxxxxxxxxxxx
> > > > Subject: [TechAssist] Re: Isolation
> > > > transformer question
> > > >
> > > >
> > > > Yes it will protect your scope from damage
> > > > while you're working on the SMPS
> > > > primary, as long as you don't plug in the
> > > > scope and the TV on the same
> > > > outlet on your transformer.
> > > > The only thing you lose is YOUR protection
> > > > should the transformer's
> > > > wiring/winding decide to short to the metal
> > > > case parts.
> > > > Damon Brunger
> > > > damon101@xxxxxxxxxxxxxx
> > > > Telrad Electronic Services
> > > > Ft Wayne, IN 46815
> > > > ----- Original Message -----
> > > > From: "Jeff Dougherty"
> > > > <jeff@xxxxxxxxxxxxxxxxxx>
> > > > To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> > > > Sent: Saturday, February 02, 2002 1:31 PM
> > > > Subject: [TechAssist] Isolation transformer
> > > > question
> > > >
> > > >
> > > > >
> > > > > Can anyone tell me if an isolation
> > > > transformer can still protect when
> > > > > plugged into an ungrounded-two prong
> > > > outlet, such as in older homes?
> > > > > Thank you.
> > > > > Jeff
> > > > >
> > > > > FAX 1-413-280-0677
> > > > > Jeff Dougherty
> > > > > Intrepid Video & Electronics
> > > > > 501 Luther Rd
> > > > > Harrisburg, PA 17111
> > > > > 717-909-8844
> > > > > VCR tips, electronics info & general
> > > > interest.
> > > > > www.intrepid-video.com www.tech-repair.net
> > > > www.thetoolcaddy.com
> > > > >
> > > > >
> > > > >
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> > > > ---
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