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AmadeusMozart · 12th Jul 2021, 10:16 am

I've got a Simpson 260 meter that can measure relatively low but around 2 ohms or less it is not much use.

I picked up from ePray a 10 ohm 1% 30 Watt thick film resistor and put that in series with the unknown resistance. Connect this to the Simpson 260 and then with a digital multimeter I measure the DC voltage that the Simpson 260 puts out (across the series 10 Ohm and unknown resistor ) and the DC voltage across the unknown resistance. A simple arithmetic then works out the unknown resistance.

Ofcourse one can use a power supply but then you'll run the risk of overloading the unknown resistor.

12th Jul 2021, 10:16 am	#27
AmadeusMozart Triode Join Date: Oct 2009 Location: Masterton New Zealand Posts: 17	Re: Simple Low Resistance Measurement I've got a Simpson 260 meter that can measure relatively low but around 2 ohms or less it is not much use. I picked up from ePray a 10 ohm 1% 30 Watt thick film resistor and put that in series with the unknown resistance. Connect this to the Simpson 260 and then with a digital multimeter I measure the DC voltage that the Simpson 260 puts out (across the series 10 Ohm and unknown resistor ) and the DC voltage across the unknown resistance. A simple arithmetic then works out the unknown resistance. Ofcourse one can use a power supply but then you'll run the risk of overloading the unknown resistor.