LordKitsuna said:
I did extend the length of the battery cables using some 4AWG wire (just lazily by braiding them into then soldering together with the existing wire) but I assume that using that different size cable screws with the math so I'm going to need to just go get some proper cable at the length I want so I can calibrate it properly
When using the full 2kA, you cannot extend the battery leads as that introduces extra inductance. Please make sure to have read the user manual chapter discussing that.
LordKitsuna said:
I thought i posted this but I don't see it so i guess not. Wanted to ask, if i am understanding the math on calibration in the manual correctly it seems like wire size matters. I was going to use 4AWG for the connection to the battery but is the calibration expecting 8AWG in particular? If so is there any kind of conversion calculation i can easily do or is it better to just stick with 8AWG
The calibration only "looks" at the output side of the unit, it doesn't care how you wire up the battery. That said it is still wise to recalibrate when the amount of available current changes considerably (e.g. when using a different battery), because the current measurement itself isn't error free.
LordKitsuna said:
value "std" almost doubled
That is the standard deviation of a series of repeated measurements, as long as that is within limits the welder allows you to continue. It would complain otherwise, but that normally means that something is broken.
LordKitsuna said:
The default setting appears to be 1 m but as far as I can tell that is wildly inaccurate for the complete kit cable lengths
It is as accurate as you make it, as it is you who is expected to add up the pieces. The stock wiring is 1 meter exactly. The probe system is 0.8 meters. You do neither need to account for the probes nor for the electronics module itself, the system has enough margin for that. The battery also doesn't count, as its inductance is quite low because of its huge mass. If your battery leads are 26 inches (0.66 meters), then the number that you need to dial in is 0.66 + 0.66 + 0.8 = 2.12 meters. This will drastically reduce the allowed current. If you don't enter the correct number, you will damage the unit from overstress. Hence, my first comment above. Note that the wire thickness is (practically) irrelevant here, only the length counts.