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Default Calibration Of Electronic Equipment In The Home Workshop

Anthony Fremont wrote:
MassiveProng wrote:

On Tue, 06 Mar 2007 19:06:50 GMT, Robert Baer



And that is *exactly* what i proposed with the "trick"; place the
DVM on the 200mVFS scale, add a shunt 1.11Meg resistor (that means in
parallel; use the dictionary) across the meter and the sensitivity of
this network is 200nAFS.
Simple ohms law...



Simple Ohms's law also states that when you series that mess with
your circuit under test, all the voltage will drop on your precious
resistor/meter set-up , and there won't be any in the circuit you wish
to examine.



Really now. And I thought that Ohm's Law stated that the voltage would be
split up in a predictable way.


In other words, dumbass, the reason that shunts are of low ohmic
value is so they do not modify the circuit you are attempting to
examine.



Stupid me, I thought they were for fire prevention.


Your stupid **** certainly would do just that. Your lack of
understanding that a current meter needs to be of low resistance is
quite a tell as well. You must be a digital guy, and seemingly not a
very good one to miss this basic.



You really aren't getting it are you? This is about measuring very small
currents, the large resistance doesn't have to drop any significant voltage.
I can't believe you have such an inept understanding of Ohm's law that you
keep harping about. The world is not all about 200A and 15kV there are
people getting things done with nanowatts of power. Just think about it,
how much voltage drop do you get with 50nA thru a .01Ohm resistor? How
would you measure 500 femtovolts? You have no concept of scale.



I gave up responding to him a while back as being a useless waste of
time.
 
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