Maker Pro
Maker Pro

Should a shunt for a copper-coil moving coil meter be copper also?

P

Phil Allison

Jan 1, 1970
0
"Paul Hovnanian P.E."
For the meter, yes. The shunt will dissipate about a watt at 10A.


** That simple fact was posted here by me 9 dys ago.

Do try reading the WHOLE thread !!!


Consider the temp rise of 1 Watt dissipated by 44 cm of wire vs 0.67 cm.


** Not a problem - Nichrome has a near zero tempco.

Its not a trivial problem,

** Bullshit.

but the copper wire is about 65 times as long.

**That is a big problem.

**** off fool.


...... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Paul Hovnanian P.E. is glutton for punishment "

No. Its about 4*10^-4/°C.

** Wrong !!!

Standard Nichrome is only 1.7 exp-4 per degree C in the range from 20C to
100C.

It gets much less at high temps too.


And 1 Watt dissipated by a 0.67 cm x 1mm wire is beginning to look like a
light bulb filament.

** Utter crapology.

Such a NiCr wire can be attached to a pair of hefty copper terminals that
screw onto the back of the meter - heatsinking it very nicely. Another
way is to use a short, flat strip necked down in the centre and trimmed to
the exact value and bolt that on the back.

Well then, educate us. What will the temp rise of that wire be?


** **** all.

Piss off - you TROLLING DAMN FOOL



.... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Paul Hovnanian P.E. is glutton for punishment "
Nitpicking.


** No. YOU are a nitpicking bullshit artist.

OK, so I used a different table value.

** FFS - you arrogant lying pig.

YOU used a * WRONG * value !!!


Now you're getting better. Big, flat (lots of surface area) shunt. Not a
short piece of 1mm wire.


** So that is what this insane tie raid is all about ??

You grossly over interpreted my post and moved the words completely out of
context.

I merely compared 1mm copper and Nichrome wire.

I did NOT attempt to supply detailed instructions on making a shunt.
----------------------------------------------------------------------------

FYI:

Go straight into HELL you INSANE nit picking FUCKWIT.





...... Phil
 
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