[Test-Equipment] Mains protection for workbench test equipment?

[k0ewu9 at juno.com]

Eric, I think that I have to go farther in my descripttion of my test
bench.  I do use an iso tx for the bench proper
 but also for the test equipment cart, a Topaz ultra isolation tx that
has a farady sheild and shows the inter winding
 capacitance of 0.05 pf!   All of the test stuff is bonded together, HP,
TEK, Wavetek, Fluke, etc.
I have not experienced voltage problems with "spikes" or other gremlins. 

btw, the bench isolsation tx is a GE 2 kva thing and has an inter winding
shield. pri to sec.
Thats just the way I do it here, right or wrong.
jack
 
On Mon, 18 Feb 2008 18:45:11 -0800 "Eric Lemmon" <wb6fly at verizon.net>
writes:
> Ideally, the isolation transformer should power only the piece of 
> equipment
> you're working on, not the entire bench.  Many items of bench test 
> equipment
> have EMI filters on their power inputs, and the leakage current 
> through the
> integral filter capacitors and/or MOVs can create a shock hazard.  
> Indeed,
> some test equipment makers clearly warn users that their equipment 
> must be
> solidly grounded for safe operation.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -----Original Message-----
> From: test-equipment-bounces at mailman.qth.net
> [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of Gary 
> Pewitt
> Sent: Monday, February 18, 2008 11:42 AM
> To: Discussion of Electronic Test Equipment; Discussion of 
> Electronic Test
> Equipment
> Subject: Re: [SPAM] Re: [Test-Equipment] Mains protection for work 
> bench
> test equipment?
> 
> Protection from shocks.  Could save your life.
> 73  Gary
> 
> 
> 
> At 11:17 PM 2/17/2008, davec wrote:
> >>HI, this thing about test benches needs another note, I like to 
> have
> >>isolation from the rest of the house so each bench is fed to a
> >>Wiremold plug strip through an isolation tx.
> >>[...]
> >>
> >>JACK IVERSON
> >
> >Excuse the really basic question, but what's the advantage of 
> >isolation for the bench power?
> >
> >Dave
> >______________________________________________________________
> >Test-Equipment mailing list
> >Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> >Help: http://mailman.qth.net/mmfaq.html
> >Post: mailto:Test-Equipment at mailman.qth.net
> 
> end
> Gary Pewitt  N9ZSV   n9zsv at magtel.com  479 675 4376
> 1500 French Prairie Rd. Booneville, Arkansas  72927
> Sturgeon's Law "Ninety percent of everything is crap"  But it's that 
> 
> other 10% that makes life worth living.
> 
> 
> ______________________________________________________________
> Test-Equipment mailing list
> me: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Test-Equipment at mailman.qth.net
> 
>