Here are some interesting results from last night's run where we scanned a range of temperatures using both wires so the current in the Celani wire was in a similar range to what he demonstrated. The graph below gives you the timeframe and a view of the temperatures achieved at each step.
Next we have the power steps for the NiCr wire (Blue channel) and the Celani Wire (Red Channel).
The Celani wire ran more current because it has a lower resistance and they are both run off the same voltage. Although, I am seriously considering adding another power supply specifically for the NiCr wire. It would be interesting to hold the cell temp constant while changing power through the active wire.
The impedance data was interesting, again. We saw a small range of steps in which the impedance rose with the temperature and then started to decline. The range in this experiment was at much hotter temperatures than the sweep test with just one wire. We still don't know what this means, exactly, but I think it is a hint. So, while I am writing this up, we stepped the power back two steps to the highlighted point.
The Excess Power data looked uneventful to a casual observer. What we saw last night:
What I "think" I see in it may be more intersting. This 5 minutes averaged data makes it much more readable.
Go ahead and tell me if you think I'm grasping at straws. I know the downward spikes should grow with the size of the power increase, which increases with the square of the voltage, so I am largely at a loss to explain this shape. Or the downward trend of the top of the first 6 steps.
The temperatures in the first few higher points are rather close to the range in which we saw decreasing impedance over time in the Mini Sweep done a few days ago. See: Sweep of Loading Temps Write Up
This is totally making me wonder, though, since it is consistently beneath the power levels seen in the first runs with the Celani Wire in Helium. Were we seeing excess energy from the "unloaded" wire and we aren't anymore? Or is the difference between Helium and Hydrogen? We'll have to plot a few more temps on calibration curves and get another perspective.