Joe,
You will get a bouncing needle when you try to measure the welding voltage...I just try to figure out where the middle of the bounce is and use that, I think some volt meters have filters in them to help you figure the median. My A/C machines run around 26-28volts @ 190amps using 5/32" E7018.
travel speed is easy...use one of these methods
time for 15 secs and measure the length of the weld and multiply by 4 to get inches/min.
time for 20 secs and measure the length of the weld and multiply by 3 to get inches/min.
time for 30 secs and measure the length of the weld and multiply by 2 to get inches/min.