Is there a failure mode of an AD595 that results in the output voltage to be nearly equal to the supply voltage?
Sorry for the delayed response. Possibly a loose connection? You do get behavior similar to that if pins 8 and 9 aren't connected. You also want to make sure that the polarity is right. The red (negative) thermocouple lead should be connected to the AD595 negative input, which is pin 14. Is this a new design or was it previously working before the failure happened? Do you have a partial schematic that I can look at/comment on?
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