Hello All,
I am trying to make a jig to measure the voltage drop on a 4 AWG weld cable to determine its resistance. What i have in mind is to supply a constant current on the cable and measure the voltage drop at either ends. In the simulation when i reduce the 'Load' resistance between 1 to 3 mOhm while keeping the Rsense constant at 7.641Ohms the current stays constant.
To measure a weld cable more amps would be needed to see a resonable voltage drop so i change the value of the Rsense and everything goes crazy. What am i doing wrong here.
I am trying to make a jig to measure the voltage drop on a 4 AWG weld cable to determine its resistance. What i have in mind is to supply a constant current on the cable and measure the voltage drop at either ends. In the simulation when i reduce the 'Load' resistance between 1 to 3 mOhm while keeping the Rsense constant at 7.641Ohms the current stays constant.
To measure a weld cable more amps would be needed to see a resonable voltage drop so i change the value of the Rsense and everything goes crazy. What am i doing wrong here.
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