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Incoherent · 11-02-2004, 04:14 PM

Been a bit busy recently, struggling to balance work, family and hobby.

Finally got the PWM water temperature regulation running. It is working very well:

This is a chart of the water temperatures (WB in and out) reaching the set point, wobbling a bit and then stabilising.

I am easily able to maintain a set temperature within +/- 0.01°C once it settles:

I think this clearly shows the advantages of doing things in the analog domain when your resolution is limited to 12 bits.
If only I could be certain my absolute accuracy was that good

Thanks for your insistance on the PWM Groth.

My main limitation now is the pumps. I am only able to achieve about 1gpm with what I have right now, with the Sphere block. This is not too much of a problem for things like thermal compound testing but restricts ones perspective somewhat with some waterblocks.

I am working on a solution for the mounting pressure issue. Hopefully I'll have a method soon. Then to start testing some greases.

11-02-2004, 04:14 PM	#34
Incoherent Cooling Savant Join Date: Sep 2003 Location: Vallentuna, Sweden Posts: 410	Been a bit busy recently, struggling to balance work, family and hobby. Finally got the PWM water temperature regulation running. It is working very well: This is a chart of the water temperatures (WB in and out) reaching the set point, wobbling a bit and then stabilising. I am easily able to maintain a set temperature within +/- 0.01°C once it settles: I think this clearly shows the advantages of doing things in the analog domain when your resolution is limited to 12 bits. If only I could be certain my absolute accuracy was that good Thanks for your insistance on the PWM Groth. My main limitation now is the pumps. I am only able to achieve about 1gpm with what I have right now, with the Sphere block. This is not too much of a problem for things like thermal compound testing but restricts ones perspective somewhat with some waterblocks. I am working on a solution for the mounting pressure issue. Hopefully I'll have a method soon. Then to start testing some greases.