Hello, and welcome to the SMF Family!
Since you're new to smoking, and especially with a new rig:
Be sure to check the accuracy of your thermometers (meat probe and cabinet) as they can be off quite a bit. And, don't rely on thermostats/controllers to maintain the set temperature, until you prove it's accuracy as well. Water-boil checks are the best way to find accuracy for probes (you can then place your probe into the cabinet on the grate(s) you'll be cooking on to verify those temps in relation to the controller/cabinet temp reading). Here's a chart to determine the temp that water boils at your elevation: Boiling Point / Atmospheric Pressure / Altitude
Any questions come up, just shout.
Enjoy your time here on the forums!!!