Hi folks,
riddle me this jokers, :-D
Do any of you, in your day in, day out, use of your multimeter, use a positive reference (black lead to positive supply side) when troubleshooting ??
Prior to going through Aberdeen long ago, I'd had a full dose of chemistry and physics in HS. , and was terribly confused about current (hole) flow and perhaps, obliviously, still am.
What's your take on the "Khan Academy"'s take on this under "Physics", "Circuits(part 1)" ??
yes, I'm a heretic :evil:
rash
brief intro: calibrated 10-12 or so, medically imaged 10-12, owned campground last 10.
I don't have sound on my work laptop, but from the drawings it is just explaining ohm's law which is one of the most basic and principle rules to use in troubleshooting and calibration in general.
I'm not sure I quite understand what you want to know, but if you are wondering how often I use it then I would respond that whenever I'm doing electronics/electrical...a lot. It plays a part in everything. Even if you don't know what's going on every time you check a multimeter almost everything you check deals directly with ohm's law. You should read up on it if this is your job.
Ah the epic question of "Hole" or "Tron" flow. Both ways work depending how you were tought. I believe the "standard" tought in the civilian world is tron flow. I say this because I have attended many colleges in many states and they all tought tron flow. The only time I saw "Hole" flow tought was in the Navy Nuke School.
Far from fact though. Just based on my experience.
Hi Kalrock, no I'm just a camper, but the point was perhaps missed in the sound. Where do you reference your meter, that is you , personally?
@ck454ss, yes, I think I got it in chemistry, 'preciate the well though out reply. I assume that a neg. gnd. ref. is your preference.
the question being, where do you clip "your ground (personally)" lead when wielding your meter?
Perhaps a poll ??? I've only run across a few that, when troubleshooting, grounded and referenced their measurements to the positive side of the supply. It sure made sense to me when I did.
thanks for your responses, anyone else ??
rash
I agree--Both ways will work--depends on your thinking and your reference
I orginally learned hole theory in physics, too. Always used electon flow in practice...the only real differenice is your "left hand rule" becomes a "right hand rule" for the magnetic field.
Hi Mike, great answer, thanks! I hadn't thought about the handedness, but you're spot on! I knew I couldn't be the only one. Unlearning hole flow was tough.
I'll study up on Ohm's law. No relation to Moe's law is it, pie 'r' round, cornbread 'r' square? 'preciate the grin though. Wasn't quite sure what to make of Khan's presentation, but I think he covered it in both directions.
At one time I kept time, until one day I realized that small errors in time could be compensated for in terms of kilo and mega tonnage. I no longer keep time.
hxxp: www. usno. navy. mil/USNO/earth-orientation/eo-info/general/units/commonly-used-units/?searchterm=1%20second%20equator
nothin' to see here folks, move on, move on.
rash
any thoughts on reference standards for nanometer dimensioning? atomic force microscopy?