2 solutions :
Low budget first crop, you just put the dehumidifier outside the tent and make sure that your air extraction can suck 3 times the volume of the tent in 1 min .
High budget after first harvest, get a humidity controller and an intake fan, plug the intake fan and the dehumidifier on the controller and put the controller probe in the tent. Once the humidity reach the level setting, it will switch on automatically the dehumidifier and the fan.