OK - Update. Before applying power to this thing, I decided to call Hobart tech support for the 27i just to make sure that there’s no difference between the 40i and the 27i. There is some differences.
Hobarts have a TORCH RED, a WORK and a TORCH WHITE connection. The WORK connection (27i) is the center post. This connection has a jumper to TORCH WHITE (right post) with a round disc type resister filter device. Jumpers usually mean continuity…WTH right? But without power - there’s none here.
But there IS continuity between TORCH RED and TORCH WHITE. WTH again?
This is normal when the machine is off due to the electrodes in the torch touching when no air is present.
Hobart tech says OUTPUT voltage is measured on/from TORCH WHITE. Giddy up.
RAW voltage hookup are opposite. The 40i must have different post locations.
Langmuir’s instructions for Raw voltage hookup specify the THC CLAMP connection (red wire) goes to the clamp wire - (WORK post on the 27i) and the THC TORCH connection. On the 27i, Black wire goes to the TORCH WHITE post of the 27i - opposite of the photo for the 40i above.
I’ve got a question into Langmuir about this because according to Hobart the 40i connections are identical to the 27i. My clamp wire clearly goes to the center post. I’m gonna go with the Red wire to the WORK post and the black wire to the TORCH WHITE on my 27i. Hopefully the sparks will be controlled and limited to the torch head.