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2 comments

  1. Hello,

    I recently built a sous vide setup similar to yours with the JLD612 PID controller and a PT100 thermocouple. The temperature offset on mine is not constant. It may be 2 degrees off when set to 100 degrees. Then it may be 8 degrees off when set to 130 degrees. Is this similar to what was happening to you before you grounded one of the PT100 leads to the sheath? Although my PT100 is cased in a waterproof plastic, I’m thinking I may be able to ground one of the blue PT100 connections to the ground bolt on the outlet. Any insight into this?

    Thanks,
    Branden

  2. I’m not sure it’s the same problem. What you’re describing sounds like a constant offset. What I was seeing was rapid variations. (If the actual water temperature was 130F — as measured by another thermometer — my display would “bounce” between 130 and 133 every few seconds.)

    On the other hand, I don’t see how grounding one side of the thermocouple would hurt anything, so you might as well try it.

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