It's definitely not showing missing probe...just a 130ish number
As for 'making sure the probe is in the right channel'...i'm not sure if I'm following because won't they work in either one?..... meaning they will just regulate whichever UTH they are hooked up too.
Right channel has a right probe. Left channel has a left probe. Each has a separate channel on a herpstat 2 . You have to go in and setup output 1 and output 2. On your herpstat.