My old multimeter, with all through hole components had an accident (I was measuring current on the 10A unfused range and then decided to check the voltage of the a lead acid battery) with one large carbon resistor glowing and melting and another through hold low value 1 Watt component suffering failure. Everything works apart from current measurement.
Can anyone identify this resistor (I cannot measure it as it has fused).
I have checked various sources and this value doesn't appear in any of the E… series. I think that the colors are blue silver white and gold and suspect that is is a sub 1 Ohm value part as it was used as a shunt for < 0.5 Amp measurements but I have never seen a dark green resistor before (I think that this would be early 90's vintage).
Best Answer
Replace it with a resistor you have that is closest to 0.1Ω
Or try 13.6" of 24 gauge wire.
Take a 100mA current reading and see how close the it is to the actual current. Ballpark will do, just want to know the magnitude.
From there it's just simple arithmetic.
Is the current 10x? Or 1x.
If you need to buy a resistor, try a 0.01Ω and a 0.1Ω Tolerance is up to you, smaller is always better.
The first band is likely brown because a 1 makes sense for a current sense resistor value.
The second may be silver where most of it has flaked off.
So my guess is 0.01Ω
0.01Ω is the most common resistor in that range so would be the most likely value for a current sense resistor.