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Old 08-28-2011, 05:28 PM
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JimF JimF is offline
'94 S500: only 793 sold!
 
Join Date: Mar 2001
Location: San Diego, CA
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Yes, but who said it's twelve volts?? That's your assumption and it's most likely wrong b/c if the meter measures "temp", then it's a much lower voltage.

What I wrote was, " . . if it IS a 5W resistor. . ", meaning that if you are SURE it's a 5W resistor, I really doubt that the resistor was 68 ohms.

However, I've given you a lot of choices so you can buy some w/o breaking the bank . . . and you can buy small quantities from them w/ no problems. RS has nothing anymore!

A meter responds to "current" and that's what a 'current-sense' resistor does; makes sure that the current flowing thru the meter won't fry it!

You can test it yourself; get some resistors and a low voltage battery. Introduce the current with a known voltage and resistance. When the meter is adjusted for full-scale deflection, you can calculate the meter's sensitivity.

I'll bet it's "1ma" full scale????
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