Hello - I am new to smoking. I recently bought a Brinkman Trailmaster Off-set smoker. I have already sealed the cooking chamber with the high heat gasket that was recommended. I purchased the tuning plates that have the graduated holes in them (small at the fire box end and large at the other end. I seasoned the smoker about three days ago and am needing to smoke a 9 lb butt roast and four racks of baby back ribs on Tuesday. While seasoning the smoker I placed a thermometer probe through a piece of wood on the cooking grate. I was amazed that the reading on the thermometer probe versus the factory installed thermometer was about 100 degrees apart! Can this be right? If so, here is my question. When I smoke the meat on Tuesday, is there any way I can figure out what temperature to run on the factory thermometer in order to maintain about 225 - 250 cooking temperature on the cooking grate? I ask because there is no way that I will be able to have time to purchase and install thermometers near the cooking grid before I need to cook on Tuesday. And I will be using the meat thermometer probe in the butt roast to know when it is done.
Thanks for any suggestions you might offer.