Just hang on. I am putting together a care package for you now. Just gotta go snap some pics to finish it off.
To answer your immediate question, go to settings and select Inty (input type) and set it to PI00 for Pt100 RTD, which is what I think you have for a sensor.
Be sure you have it wired correctly first, however. Connect the two leads, you should have three, that should test short circuit to terminals 6 & 7 and the last lead which should read a resistance to the other leads that varies with temperature to terminal 8. You might even want to add a jumper between terminal 6 & 7 just to be sure. That will supply a current source to the sensor, the PID will read what comes back on terminal 8 to determine the temperature.
If you got what I think you did, you have a platinum resistance type of sensor. It's the perfect one to have for smokers as the range in right, they are rugged and they have a very linear temp responce curve. The sensor element itself is a platinum film on a ceramic substrate.
BTW if I were you, I'd seal up the junction where the wire enters the probe housing with some high temp RTV. I used Permatex Ultra Copper, . Then I put some heat shrink tubing over that. It's sealed up against moisture entry which would foul the sensor and make things get pretty wacky.