Yea, it's looking like if I want to display my weld current, it's going to be that separate meter. Not sure why I had my head up my butt thinking I would have a DC signal. I guess because I was using my bench power supply playing with different methods of how I was going get and measure the signal voltage and that was all DC. The meter I was looking at used a DC input, so now I've got to my shunt voltage/current to a filtered 200mV DC. I guess I can rectify it just like any AC, using the end with zero potential as my negative and the end with my 200mV as the positive with some type of rec between them, even if they are still reading the same piece of wire. Never tried that so that's one I will have to play with.
Anyway, thanks for the suggestions. I really don't care about reading the input current with a Hall devise unless there is a formula I can use in the Arduino that would read the input and convert it to display it as my output current. My concern using a separate meter is, I'm only looking at a 100ms weld pulse and that's going to barely be a blink on a meter. Using the Arduino, I'm thinking I can keep it one the display longer and even have the option to press a button to manually reset the display.