Just bought a 600ct humi and need advice

From Cheaphumidors.com (I bolded what I thought was the most important part):

Re-humidifying your humidor is easy, just follow these simple steps:

Place a shallow container filled with distilled water in the humidor
Place calibrated hygrometer inside humidor
Charge your humidification device
Place humidification device inside humidor
You have to check the relative humidity every day. Depending on a number of factors this can take a few days to a few weeks. When you get in the 70 range it is safe to store you smokes inside. As long as you constantly recharge your humidification device you will never have to wait to store your cigars again.
I always suggest waiting at least 7-10 days, no matter what the hygrometer says before putting cigars in a new humidor.