Originally Posted by regul8dhbbyist
It's been a doozy of a year already. One of my projects this year will be to get my mes 30 se as accurate as possible and maybe get a mailbox mod.
So, for my first goal, is it possible to replace the heat controls or thermometer /thermostat to improve the control on temp? What do you use to do this? Any thoughts would be great.
By "accurate as possible" do you mean knowing what temperature the meat has attained? If so, get the Maverick suggested by David (theMule69).
If "accurate as possible" means getting the chamber to exactly where you set it, you have two items to consider.
1. The MES controller works with an on/off action similar to your house thermostat. When the temperature is below the setpoint, the heating element comes on at full wattage, and stays on until the setpoint and temperature are equal. Then the element turns off. This results in some "overshoot". 10 deg f is common. Then the inverse happens. The element stays off until the temperature falls below the setpoint, and the element turns on. The combination over/under shoot results in an oscillation, with (hopefully) as much time over setpoint as under setpoint averaging to the desired temperature.
One way to deal with this is using a PID controller. Search the forums for "PID" for background information, "PID + MES" for how other MES owners have made the modification. Here's what I did:
2. Even with a PID, weirdness can happen. Remember the controller works to control the temperature at the sensor. The temperature for the rack just above the heating element will be hotter than the temperature at the top shelf. You can find various work arounds to help disperse the heat in the chamber.