Gentle Friends,
I bought myself a new toy. A temperature meter (dual channel K type thermocouple reader for those taking notes....). I got two types of probes, 3 inch or so long, 1/8 diameter stainless steel jacketed and fine wire spot weld (about .010 diameter). The latter is 'fast responding' due to lack of jacket.
So I stuffed one of the TC probes down into the bottom of the bowl of a handy Solo (M1A), packed it in with cotton and let fly for a quick 'look see'.
First off, temperature, as you might expect if you thought a bit, is a moving target in real time. The meter updates maybe twice a second? And the temperature of the Solo is rising and falling as the heater cycles. The net result is watching the numbers makes you dizzy. So, below, is a 'fairly good guess' at what's happening. The low temperature is harder to spot (seems to change faster). It's also fun to note that the bowl temperature 'lags' some. That is it continues to fall for several seconds (and five or more degrees) after the heater comes on. And likewise 'coasts up' several degrees higher after the heater shuts down. Fans of Thermodynamics (both of you) are no doubt nodding up and down in a knowing way, the rest can scratch their heads and wonder what the strange fascination with 'heat flow' is all about.....most will just ignore it, being smarter than the other two groups.
Anyway, some numbers (give or take) for your speculation, in parentheses is what I think the official temperature for that range is:
Step 2: 300 to 310F (365)
Step 4: 345 to 360F (383)
Step 5: 365 to 380F (392)
Step 6: 385 to 400F (401)
Step 7: 405 to 420F (410)
Again, the numbers are rounded off, but IMO clearly show about 20 degrees F per step, not the 9 Arizer says? And while there's a pretty close match at the top end, the bottom is way off, IMO more in line with what you'd expect really?
I'll be poking at this some as the spirit moves. First step is to check the calibration of my four TC (two of each, the meter does deltas....). Boiling and ice water should do nicely there.
The meter also has a somewhat cumbersome Min, Max and Average function. Some night when I'm really bored I'll do a longer run or two at each step and let the gadget collect more refined data. For now, I think it's plenty accurate to fuel lots of speculation?
OF