Ac infinity vpd thermometer

So has anyone checked this out?
I just got mine in the mail. There's a way to change the vpd on the ac infinity controller 69. It's my understanding that basically it calibrates the vpd sensor. Is that right? Basically it told me my vpd was higher than I thought, and now idk how to get it in the right direction. Any help would be appreciated. Tks ahead of time

Your vpd is a combination of humidity and temperature. If the vpd is too high you need to increase the humidity, if it's too low vice versa. It's just a balancing act.

I have the ac infinity heater + humidifier and set them to balance out at 0.8 currently with a temp between 77-81.