Until your humidor is fully seasoned I would not worry about the Hydra and this could take several weeks depending on the dryness and size of the cabinet. Once you have calibrated your hygrometers you can check the Hydra by placing it in a cooler. In the upcoming months your humidity will fluctuate as the temps change and you use the heat in your house. But if your cigars are smoking well, dont worry about it too much.
