Systems and methods of determining load temperatures

A computer-implemented method, comprising:

• introducing a surrounding medium into a chamber;
• modifying the temperature of the surrounding medium using a temperature modifying device to achieve a predetermined surrounding medium temperature;
• monitoring the surrounding medium temperature in the chamber;
• monitoring the power output level applied to the temperature modifying device
• determining a steady state power output level to achieve the predetermined surrounding medium temperature in the chamber using the monitored surrounding medium temperature and the monitored power output level applied to the temperature modifying device as inputs to a computer processor;
• receiving a plurality of loads, each having a respective load temperature other than the predetermined surrounding medium temperature into the surrounding medium the;
• and
• determining that each of the respective load temperatures is substantially at the predetermined surrounding medium temperature using the computer processor when the power output level applied to the temperature modifying device reaches the determined steady state power output level and without any direct temperature measurement of any of the respective loads.