Oh so I am old now. Thanks On Mar 31, 2016 7:59 PM, "Josh Luthman" <[email protected]> wrote:
> Probably just shaky hands right when the camera snapped. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > On Mar 31, 2016 9:55 PM, "Jaime Solorza" <[email protected]> > wrote: > >> OK I will get a new phone... but first suffer >> On Mar 31, 2016 7:49 PM, "George Skorup" <[email protected]> wrote: >> >>> Dude, get a new phone, my eyes hurt now. Sorry, just being honest. >>> >>> On 3/31/2016 8:31 PM, Jaime Solorza wrote: >>> >>> We do isolate them... >>> On Mar 31, 2016 7:11 PM, "Adam Moffett" <[email protected]> wrote: >>> >>> Do you need to? We want them all to go to the earth eventually right? >>> >>> >>> On 3/31/2016 7:38 PM, Jaime Solorza wrote: >>> >>> Are you isolating your DC and AC grounds? >>> On Mar 31, 2016 4:44 PM, "Ken Hohhof" <[email protected]> wrote: >>> >>>> If the two pieces of metal are not connected together, like if one of >>>> them is floating except for stray high resistance paths to ground, then I >>>> wouldn’t pay much attention to the voltmeter reading. Especially if you >>>> are using a high impedance digital meter. >>>> >>>> Or if they are connected via a wire carrying high current, 0.1 volt may >>>> not mean much. If you have 10 amps flowing through a wire with 0.01 ohms >>>> resistance, there’s your 0.1 volt. >>>> >>>> If that second piece of metal is grounded to your common ground point >>>> with a wire that should not be carrying any current, then I might worry >>>> about the 0.1 volt. You might have a ground loop. >>>> >>>> Are you seeing a DC or AC voltage? >>>> >>>> >>>> *From:* George Skorup <[email protected]> >>>> *Sent:* Thursday, March 31, 2016 5:32 PM >>>> *To:* [email protected] >>>> *Subject:* Re: [AFMUG] Another ground question >>>> >>>> That's what i was going to say. If it's a cheap meter, don't worry >>>> about it. Bond everything and you should be fine. >>>> >>>> On 3/31/2016 5:27 PM, Chuck McCown wrote: >>>> >>>> Depends on the meter. Does the meter read 0.0 when the leads are >>>> shorted together? >>>> Some meters have some random fluctuations in the least significant >>>> digit all the time. >>>> >>>> *From:* Josh Baird <[email protected]> >>>> *Sent:* Thursday, March 31, 2016 3:24 PM >>>> *To:* [email protected] >>>> *Subject:* [AFMUG] Another ground question >>>> >>>> I'm working on a new DC enclosure (steel 19" rackmount cabinet). When >>>> using a DC volt meter, and putting the 'red' lead on a common ground point >>>> (my ground bus, a metal rack rail, etc), and the 'black' lead on something >>>> metal, I'm seeing ~0.1V. >>>> >>>> I'm assuming this is bad. On the bench currently, I have the AC ground >>>> connected to my PSU. I have all other devices (switch, surge suppressors, >>>> rack rails, etc) tied to a common ground that isn't yet connected to >>>> earth. My PSU and power distribution is on a metal DIN rail which in turn >>>> is mounted to the metal rack rails. >>>> >>>> Should I be concerned with this? As much as I try (or not), I still >>>> have trouble wrapping my head around ground/ground potential/etc. >>>> >>>> Josh >>>> >>>> >>>> >>>> >>>> >>> >>>
