Setting up THCAD-5 with 7i96

I'm setting up the THCAD-5 with plasmac and under the THCAD calibration calculator I entered the figures located on the back of my THCAD-5. I have Hypertherm 45xp on 50-1 voltage divider, and the THCAD-5 jumper on 32. Since under the calculator I don't see an option for the THCAD-5 I just divided the THCAD-10 results by 2 to get the scale for my THCAD-5. However, when I punch the calculated scale/offset into my Plasmac config the resulting voltage shown at torch idle is 83. If I pulse fire the torch, the reading is 240V. If I play with the scale settings I can manipulate it towards zero but not sure if this is an acceptable way to "manually" correct whatever my issue is? I don't think so, because if I pulse the torch after reducing the scale it only says 1v. The calculator gives me 0.0096*** but I have to bump it down to 0.000058 to make it go from 83v to 0v while the torch is idle.

FWIW, I also have a THCAD-10 that I'm also having the same issue with i.e. after entering my THCAD-10 frequencies into the calculator and then changing my config settings to reflect the newly calculated numbers, my torch at idle is reading about double what the THCAD 5 is. In either case, if I drop the "arc ok" parameter to above the idle reading then I get an "arc ok" signal. I'm lost as to what I'm doing wrong?? Thanks for any help.

Funny story: After I hit submit to save that calculator I realized I didn't have the option there for THCAD-5 and for the life of me I couldn't figure out how to login to edit the calculator.

Here are the formulas used in that calculator:
So simply dividing the scale value by 2 should have been sufficient.

If someone doesn't spot an obvious error you've made you could always disconnect the plasma and attach a LV DC power supply and verify readings/calibration against a multimeter...

The THCAD-5 figures on back sticker are
0v = 137.3
5v = 966.8

I'm entering scale of .0096 and offset of 4290.625 in the config after running the calc for THCAD-10 and then dividing the given scale (0.01929803) by 2 to reflect the THCAD-5...hoping I did it right...my math is a bit shaky so was scared to try it manual yet lol

If I try the offset manually I get
137.3 / 32 = 4.290625

If I put that in config panel, that bumps my readout value down to 42V...if I pulse the torch my readout goes to +/- 200v.

Okay so I gave scale 0.00964436 and offset 4290.625 a try and my idle voltage is 42v now..pulsing the torch over a piece of 3/16" sheet my the arc-ok indicator comes on and the voltage shows 160v-170v.

If someone doesn't spot an obvious error you've made you could always disconnect the plasma and attach a LV DC power supply and verify readings/calibration against a multimeter...

So if I understand correctly you're suggesting to hook up a known voltage such as from my 24v power supply, in place of where the voltage divider is located, then I can adjust the scale to reflect the 24v on the readout?

I just now after reading your post realized that the - sign was missing from the scale. Okay the problem is fixed now I believe, as I have 0v now that it's changed. When torch is fired it shows around 120v. I will go see if I can cut some things now, thank you!

Do what now?

Just for my own edification what's going on here? I wouldn't think either the scale as raz mentioned, or the offset as phill mentioned, should be negative. Since FFS > FZERO then the scale should be positive. And since FZERO > 0 then the offset should be positive.

Does it have to do with hal config settings?