A small update:
The control panel only has 4 buttons:
-pump start/stop
-temp up
-temp down
-output temp
The thing is, the last button does more than one thing. It can switch the unit to "Gradient mode" or "Stabilized mode", but I came across these quite accidentally, by repeatedly pressing that button. I haven't been able to reproduce the sequence yet.
On a positive note, the "temp up/down" buttons can actually allow me to set the temp in 0.5 deg C increments. Once again, it appears to be in the timing of how I press the buttons.
I did notice that the display occasionally flickers at a 1 Hz rate, so that's going to be my starting point, in figuring out this unit's functions.
More as I progress.
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