Announcement

Collapse
No announcement yet.

First roast using data logger.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • First roast using data logger.

    Roasted 500 grams of Sumatra Mandehling this after noon with the d/logger hooked up, all went ok up to the point of saving the resulting graph, the best I could do was this, see link at bottom.
    Could not for the life of me get it saved in the way it displays on the screen, Im obviously missing something, anyone?
    BTW the roast went very well, finished @ approx 220 degrees, 15 mins.


  • #2
    Re: First roast using data logger.

    Ive gotta go out in a sec Jon, if its not too late ill drop ya a Pm when i get home, gimme a ring and ill talk ya through displaying your profile properly in excel, like this;

    Comment


    • #3
      Re: First roast using data logger.

      Originally posted by 1115332A2A2F302728460 link=1260345064/1#1 date=1260345547
      Ive gotta go out in a sec Jon, if its not too late ill drop ya a Pm when i get home, gimme a ring and ill talk ya through displaying your profile properly in excel, like this;
      Thanks Warren.

      Comment


      • #4
        Re: First roast using data logger.

        Hi Jon,

        If you look at the end of the thread http://coffeesnobs.com.au/YaBB.pl?num=1214989367

        I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts. It has instructions etc. It was provided based on use with a Hottop, but you may find it useful as well.

        Regards,
        Graham

        Comment


        • #5
          Re: First roast using data logger.

          Originally posted by 1421323B323E18530 link=1260345064/3#3 date=1260416844
          Hi Jon,

          If you look at the end of the thread http://coffeesnobs.com.au/YaBB.pl?num=1214989367

          I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts. It has instructions etc. It was provided based on use with a Hottop, but you may find it useful as well.

          Regards,
          Graham
          Thanks Graham, will have a play.

          Cheers,

          Jon.

          Comment


          • #6
            Re: First roast using data logger.

            Originally posted by 7144575E575B7D360 link=1260345064/3#3 date=1260416844
            I provided a zip file containing a later version of the Excel spreadsheet for capturing the datalogger info and producing charts.
            Well got it up and running Graham, heres a link to it, comments welcome.

            Comment


            • #7
              Re: First roast using data logger.

              Some photos of the completed roast would probably be helpful too John....

              Mal.

              Comment


              • #8
                Re: First roast using data logger.

                Originally posted by 6A47434F422E0 link=1260345064/6#6 date=1260543055
                Some photos of the completed roast would probably be helpful too John....

                Mal.
                Will put it on todays list of things to do Mal.

                Comment


                • #9
                  Re: First roast using data logger.

                  OK this is the end result, 500 grams of Sumatra Panjang Mandheling.
                  The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
                  At the time of posting the pic had not tried this batch, have since done so and am not exactly over the moon about it, reckon I stopped too early, its quite light and has an earthy taste! I suspect taking it to second crack would have improved it out of sight.
                  This was the last of the bag, as I recall previous darker roasts have been much better, sadly I made no notes so am really only guessing, wont make the same mistake again.



                  Comment


                  • #10
                    Re: First roast using data logger.

                    Gday Jon,

                    Overall, I would say the roast is a little light with the unevenness not at all unusual for beans from this region. Some beans actually appear to be slightly burnt but that may be down to the lighting, etc....

                    Even tough you may not enjoy brews made with them at the moment, keep trying them every day to take note of how the flavour develops. Given the lightness of the roast, you may have to consider brewing with other than an espresso machine.... To that end, try using a pour-over, filter, syphon, or other manual method that takes advantage of the varietal flavours that will come to the fore. Definitely worth doing.

                    With your next roast batch, try to see if you can replicate the profile listed by Warren above. Something akin to that will be more suited to espresso brewing I believe. I guess the most difficult thing to gain control of with Corretto roasting, is the heat input. Youve got to try and find the balance that allows adequate control over the roast profile but avoids burning the edges of the beans (called tipping) as this will contribute an exaggerated ashiness to the flavour of the brew, far in excess of the proportion of the beans that actually display tipping. Earthiness is not a bad trait though and one that is to be expected from most Mandheling beans; an over-riding earthiness will be down to the lightness of the roast and will dissipate the longer the beans are rested.

                    Thats probably enough to be going on with mate so hope some of this is helpful...

                    All the best,
                    Mal.

                    Comment


                    • #11
                      Re: First roast using data logger.

                      Originally posted by 604D494548240 link=1260345064/9#9 date=1260692921
                      Gday Jon,

                      Overall, I would say the roast is a little light with the unevenness not at all unusual for beans from this region. Some beans actually appear to be slightly burnt but that may be down to the lighting, etc....

                      Even tough you may not enjoy brews made with them at the moment, keep trying them every day to take note of how the flavour develops. Given the lightness of the roast, you may have to consider brewing with other than an espresso machine.... To that end, try using a pour-over, filter, syphon, or other manual method that takes advantage of the varietal flavours that will come to the fore. Definitely worth doing.

                      With your next roast batch, try to see if you can replicate the profile listed by Warren above. Something akin to that will be more suited to espresso brewing I believe. I guess the most difficult thing to gain control of with Corretto roasting, is the heat input. Youve got to try and find the balance that allows adequate control over the roast profile but avoids burning the edges of the beans (called tipping) as this will contribute an exaggerated ashiness to the flavour of the brew, far in excess of the proportion of the beans that actually display tipping. Earthiness is not a bad trait though and one that is to be expected from most Mandheling beans; an over-riding earthiness will be down to the lightness of the roast and will dissipate the longer the beans are rested.

                      Thats probably enough to be going on with mate so hope some of this is helpful...

                      All the best,
                      Mal.
                      Thanks Mal,
                      Appreciate your thoughts, certainly plenty to think about there.
                      Cant say I like the earthy flavour so perhaps the Mandheling beans are one for me to avoid in the future.
                      Have been contemplating resurrecting the siphon, perhaps now would be a good time, just might learn something.

                      Cheers,

                      Jon.

                      Comment


                      • #12
                        Re: First roast using data logger.

                        Originally posted by 3B070E1603620 link=1260345064/8#8 date=1260607195
                        The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
                        Flash lighting always makes it difficult to diagnose over the internet.
                        There does though appear to be quite a few lighter beans.

                        A close up look shows some beans with tipping and possibly some getting towards burnt in patches as Mal has suggested.

                        The tipping has never bothered me taste wise but I have tried to avoid it if possible when roasting.
                        It all comes down to practise.

                        Try find a bean thats less prone to uneven roasting and stick to that for a while.

                        Ive roasted over 60kgs of PNG Kimel.
                        Im not saying to do the same, but the more roasts you do on the one bean, the more youll learn about consistency in your roasting.
                        From there you can transfer what youve learned across to other beans.

                        Comment


                        • #13
                          Re: First roast using data logger.

                          Originally posted by 7844594248495E4B43482C0 link=1260345064/11#11 date=1260698835
                          Originally posted by 3B070E1603620 link=1260345064/8#8 date=1260607195
                          The flash makes some of the beans look lighter than what they are, on the overall roast colour was quite consistent.
                          Flash lighting always makes it difficult to diagnose over the internet.
                          There does though appear to be quite a few lighter beans.

                          A close up look shows some beans with tipping and possibly some getting towards burnt in patches as Mal has suggested.

                          The tipping has never bothered me taste wise but I have tried to avoid it if possible when roasting.
                          It all comes down to practise.

                          Try find a bean thats less prone to uneven roasting and stick to that for a while.

                          Ive roasted over 60kgs of PNG Kimel.
                          Im not saying to do the same, but the more roasts you do on the one bean, the more youll learn about consistency in your roasting.
                          From there you can transfer what youve learned across to other beans.
                          Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. :

                          Comment


                          • #14
                            Re: First roast using data logger.

                            Originally posted by 724E475F4A2B0 link=1260345064/12#12 date=1260702917
                            Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. :
                            You could pretty well settle on any decent PNG varietal for roast evenness and ease, ditto for decent Peruvians, Colombians and Tarrazu varietals too. Have a glance through the Green BeanBay selections and read through Andys notes, he makes mention of bean varietals available that are easy roasters....

                            Mal.

                            Comment


                            • #15
                              Re: First roast using data logger.

                              Originally posted by 072A2E222F430 link=1260345064/13#13 date=1260712552
                              Originally posted by 724E475F4A2B0 link=1260345064/12#12 date=1260702917
                              Thanks for having a look TG, have taken your comments on board, so now the search begins for beans that roast evenly. :
                              You could pretty well settle on any decent PNG varietal for roast evenness and ease, ditto for decent Peruvians, Colombians and Tarrazu varietals too. Have a glance through the Green BeanBay selections and read through Andys notes, he makes mention of bean varietals available that are easy roasters....

                              Mal.
                              Thanks for the tips Mal, will do.

                              JW.

                              Comment

                              Working...
                              X