take measurements

[wang-edward]

to get max_heating_rate:

• plug in thermocouple
• set PWM to 100%
• record temp / time
  • consider thermal intertia. the earlier measurements might not be representative

to get cooling_coefficient:

• Heat to some temp (i.e. 1000C)
• stabilize the temperature
• record ambient temperature
• set PWM to 0%
• record temp / time
  • $T(t)=T_{\text{ambient}}​ + (T(0)−T_{\text{ambient}}​) \cdot e^{−kt}$
  • where $T(0)$ is the target temp (i.e. 1000C)
• Also need to convert sim.py to use exponential model