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HeatSnob - Grounding errors with non-supplied probes

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  • #16
    Originally posted by sando View Post
    Just received the Heatsnob....
    Is there a way to have the Heatsnob default to the 2nd Probe and not the 1st Probe every time ?
    Windows USB is a weird beast, it scans the USB ports in use and then assigns an internal address for each. Roast Monitor then "asks" Windows which ports have a thermocouple attached and assigns them in order.

    If you swap over the USB connections on your PC the same port should be the primary (first seen) in Roast Monitor.

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    • #17
      Is it possible to interface to the heatsnob driver directly through an API, and if so, how to go about it?

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      • #18
        Is it possible to run the heat snob using other software (other than Roast Monitor)? Im running a Mac, and would really like to avoid having to get a PC.

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        • #19
          The old multimeter ran well under virtual machine. My experience with parallels was less enjoyable. It ran- sometimes...

          To the best of my understanding, heatsnob was built for windows.

          Shouldn't be too tough to find a cheap or free hand me down. I picked a brand spankers small notebook for ~$200 and it's perfect.

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          • #20
            Yep, agree...

            Notebooks can be had for extraordinarily small amounts of money these days, and with quite reasonable levels of performance. Perfect as a dedicated roast monitor and record keeper...

            Mal.

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            • #21
              Being a dedicated Mac user I didn't have any trouble using a Windows laptop for the roaster.

              The wife spilled a glass of red on her work one so I hooked it up to a 20" monitor, bought a wireless keyboard

              (the wine killed the keyboard on the laptop)and mouse (hate trackpads).... and don't have to worry about navigating around Windows....

              it's just plug, play and roast. WiFi'd into my home network for upgrades etc.

              I just shut the roastery door at the end of the day and no-one is none the wiser that there's an odd computer on the property. ;-D

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              • #22
                My issue was not wanting a 5th computer in the house... ridiculous enough to have 5! So I found a Mac solution which unfortunately excludes me from benefiting from the very nifty HeatSnob package, but I'm happy enough.

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                • #23
                  I managed to get this puppy running on linux with the assistance of VirtualBox.

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                  • #24
                    Originally posted by MrFreddofrog View Post
                    Probably cause the victor is running on batteries and your laptop is on 240v. Use a multimeter to check the resistance between the probe sheath and the positive and negative terminals. There should be no continuity.
                    I used a multimeter to check but it seemed fine, so went back to the victor until I could investigate further.
                    I have now used some silicone to insulate the probe from the metal visegrips that hold the probe in place and all works well now.
                    I used a small silicone baking mould that is food safe and temperature rated.

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                    • #25
                      Originally posted by johnandcass View Post
                      I used a multimeter to check but it seemed fine, so went back to the victor until I could investigate further.
                      I have now used some silicone to insulate the probe from the metal visegrips that hold the probe in place and all works well now.
                      I used a small silicone baking mould that is food safe and temperature rated.
                      I have similar problem for months, I better go get some PTFE Tubing hopefully it fixes the problem. The old Victor never gives me this problem.
                      Attached Files

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                      • #26
                        As none of the other ideas to work around the use of grounded probes are ideal with my roaster I have built a USB isolator and put it and the guts of the Heatsnob in a new enclosure.

                        For those interested in the detail the circuit is based on a Analog Devices ADUM4160 USB isolator chip that they kindly sent me as a sample.

                        So far it has been tested on the bench and it works fine with the Heatsnob connected, I will get it installed in the roaster later in the week.



                        Gary
                        Attached Files

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                        • #27
                          Just finished a roast with the USB isolated Heatsnob and it worked fine, no more "Thermocouple shorted to ground" errors.


                          Gary

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                          • #28
                            Upgraded to the latest version of Roast Monitor , problem mentioned in #25 fixed .

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                            • #29
                              BTW, you can indeed interface the heat snob to other software, at least you can for Artisan using the code I posted on github. See this post:
                              http://coffeesnobs.com.au/home-roast...ons-hacks.html

                              Cheers,
                              ~Bruce

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                              • #30
                                Also, I experience fluctuations in temperature by a few degrees even at room temperature, over just a few seconds. I would say the swing is +/- 3 degrees celsius, and its killing my ROR curve.
                                Is it true that the best solution is just to ensure the probe never comes in contact with the metal of the roaster?
                                I am using a Corretto roaster, and the probe goes through a hole drilled in the bread pan.

                                Although its impressive, I would rather not build a USB isolator solution!

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