First of all, if you have that huge humidifier in that small of a humidor, there is no reason to season it. The humidifier will eventually season it. (Dimensions: 11" x 4.25" x 4.75") This unit I use in a huge cabinet. In a small one, you might have to much humidity going in with that big piece of foam in the unit. Even if you set it low, you will be putting out a lot of humididty. would suggest getting a smaller unit to humidify the smaller humidors and using the XG1000Pro for larger humidors.
Second of all, my hygrometer on that unit is about 4 off from my Diamond Crown hygrometer. The Diamond Crown was tested and less than 1% off. You need to do some kind of test or buy a reliable hygrometer to see where you are with your humidity.
I hope this helps you and good luck.
Tuck