Only if you're younger than me. I have the least steady hand I know of. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mar 31, 2016 10:04 PM, "Jaime Solorza" <[email protected]> wrote:
> 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 >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>>>
