Re: How much heat sink?
Peter, If it were me, I would start from stratch and without attempting to energize any componets downstream of the PID, I would check voltage levels. First would be the AC to the PID, next would be the PID control to the SSR. This voltage should be DC and at a level compatible to the operating voltage of the SSR. If you find that this is AC then theres the problem. If this checks out OK, then, next you might take the TC and stick it in a cooking oven where it can be heated to a known temp and check out how the PID control voltage responds to the temp of the TC when you change the temperature set point on the PID. The next thing that you check would be the line voltage, both sides, to insure that they are at the normal operating level, I'm assuming that you are on a 240 volt system. Hope this gives you some ideas, each componet has operating parameters and all have to be compatible with one another. Fred
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