CraftBeerPi PT100 Problems

Discussion in 'Brewer's Friend Announcements' started by Trump, Feb 2, 2018.

  1. Trump

    Trump New Member

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    I have my MAX31865 boards hooked up. All read the same temp...1800F whether the PT100 is plugged in or not. I have checked all connections and did not find a short. Anybody have any ideas?? 3-wire RTD.

    Thanks.
    Ken
     
  2. Ozarks Mountain Brew

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    Is there settings for the board, could it be set to a different probe?
     
  3. BeerGreek

    BeerGreek New Member

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    Good morning, if anyone is still monitoring this thread I need some help. I set up my craftbeerpi box with 4-wire 240 coming into the box, wired it up like it instructs in Craftbeerpi, but I'm showing constant power to all my outlets (leviton L6-20R), even though there's no continuity between poles 1 & 2 on the SSR. I've posted a diagram of how I've wired everything. Thanks in advance. SSR Wiring for Craftbeerpi.png
     
  4. Ozarks Mountain Brew

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    there should be a magnetic relay to there before each ssr and a switch turns on the relay to open the gate for the ssr to power the element
     
  5. BeerGreek

    BeerGreek New Member

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    I'm confused. i thought the SSR is the relay that is usually open and closes when it receives the 3v input from the RPi. The way it's been explained is poles 1 & 2 are open on the top of the SSR, then once the 3v comes in to the bottom of the SSR, 1 & 2 close which allows the 120v current to pass through to the outlet. Is that not right?
     
  6. Ozarks Mountain Brew

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    if your running 240V to your elements you need a relay, the ssr is just considered a switch, the way you have it now 1 hot leg is always powered, the relay cuts both legs and the pi turns it on and lets both through, they may have a different reason for that and I would check with them, but what I'm suggesting is common practice
     
  7. BeerGreek

    BeerGreek New Member

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    Ok I understand the reason for the relay, however that only cuts one of the hot legs. The other hot leg is still getting constant power from the SSR even though there isn't 3v going to it to turn it on.
     
  8. Ozarks Mountain Brew

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  9. BeerGreek

    BeerGreek New Member

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    Ok Thank you. I appreciate the lead.
     

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