Just put this together for accurately matching coils and measuring RDA-to-mod contact resistances, power cable resistances, etc...
With the four-wire configuration two wires pass a constant current through the coil or whatever and the other two measure the voltage across it which almost completely cancels the resistance of the probe leads, and also the point contact resistance between the probes and the test piece. This allows the measurement of the 510 contact resistance between your mod and your tank/RDA or of the current paths in mechanical mods, power supplies, cables, battery packs or such. The screen reads miliohms, so no decimal point.
Usually you need to get an LCR meter for this but I found these things here (there is a cheaper one at $22 but the other one has all the details and specifications on the page) it seemed to say it does not come with kelvin clips but it did so now I have extras lol.
Just give it a lithium battery, a 18650 holder is a convenient solution
, I stuck a 510 connector on it with a selection switch but that's not super useful, also banana plugs but you might as well just have the clips permanently attached to it.
It only goes up to 2ohms but most people will have a multimeter for anything above that.
I'm also building a current/voltage meter that calculates coil resistance and power while a coil is running, see how it changes as it heats, but I want it for general power monitoring too, detecting load resistances of high power LEDs and such, it should work up to 60V and 100A, I'll post that build later.
With the four-wire configuration two wires pass a constant current through the coil or whatever and the other two measure the voltage across it which almost completely cancels the resistance of the probe leads, and also the point contact resistance between the probes and the test piece. This allows the measurement of the 510 contact resistance between your mod and your tank/RDA or of the current paths in mechanical mods, power supplies, cables, battery packs or such. The screen reads miliohms, so no decimal point.
Usually you need to get an LCR meter for this but I found these things here (there is a cheaper one at $22 but the other one has all the details and specifications on the page) it seemed to say it does not come with kelvin clips but it did so now I have extras lol.
Just give it a lithium battery, a 18650 holder is a convenient solution
, I stuck a 510 connector on it with a selection switch but that's not super useful, also banana plugs but you might as well just have the clips permanently attached to it.It only goes up to 2ohms but most people will have a multimeter for anything above that.
I'm also building a current/voltage meter that calculates coil resistance and power while a coil is running, see how it changes as it heats, but I want it for general power monitoring too, detecting load resistances of high power LEDs and such, it should work up to 60V and 100A, I'll post that build later.
