Results 1 to 4 of 4

Thread: Ozito heatgun meltdown and Type K thermocouple

  1. #1
    Senior Member
    Join Date
    May 2008
    Posts
    437

    Ozito heatgun meltdown and Type K thermocouple

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    >:( ::) ;D

    I was doing a dry run with my Corretto-in-progress, testing my self-fibreglass-insulated thermocouple up to 260*C, when I noticed the heatgun melting down instead!!!!

    Blah.

    The thermocouple exposed tip was melting back, so Id better not take it over 230*C again, and the white and blue covering of the thermocouple was beginning to yellow under the fibreglass.

    EDIT update: everything seems fine when I keep it below 220*C, but I have to keep the HG nozzle out of the pan, which is a small one anyway so heat distribution is pretty easy. Out with a fan to keep the HG cool... ahhh, of course that works!

    Consistency in temps starts to show on my DMM.

  2. #2
    ev
    ev is offline
    Senior Member
    Join Date
    Jan 2005
    Posts
    156

    Re: Ozito heatgun meltdown and Type K thermocouple

    I think youll find that a dry run may also cause it to get too hot. Better off putting some beans in & doing the real thing. You dont want to overheat the pan & drive coupling if you can avoid it. Id also recommend a back-up HG just in case the ozito burns out like mine did. It didnt last very long at all.

    Evan.

  3. #3
    Senior Member
    Join Date
    Mar 2008
    Posts
    107

    Re: Ozito heatgun meltdown and Type K thermocouple

    Intellidepth, have posted a couple of things in your "Tips for first ever roast?" thread that addresses the heat issue.

    Could even look at half a lid, to shield the HG a bit from the heat coming back.


    Cheers..................Sean

  4. #4
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,879

    Re: Ozito heatgun meltdown and Type K thermocouple

    Behmor Coffee Roaster
    Quote Originally Posted by scooter link=1214624638/0#2 date=1214825298
    Could even look at half a lid, to shield the HG a bit from the heat coming back.
    Yep,

    Thats what I do Sean and it seems to work pretty well. Also seems to have the added benefit of creating a slightly more uniform and hotter roasting environment, which is good for roasting larger batches (in my case anyway ;)).....

    Mal.



Similar Threads

  1. thermocouple type?
    By WSullivan in forum Home Roasting - Tips, Tricks, Ideas
    Replies: 7
    Last Post: 9th September 2014, 02:59 PM
  2. Fitting a bead type thermocouple (to a Silvia).
    By Toad in forum Brewing Equipment (non-machine specific)
    Replies: 3
    Last Post: 28th August 2012, 10:18 PM
  3. ozito temperature variable heatgun
    By gavin in forum Roasters
    Replies: 8
    Last Post: 5th August 2009, 10:42 PM
  4. thermometer with K type thermocouple
    By Gra in forum General Coffee Related...
    Replies: 12
    Last Post: 24th February 2009, 09:13 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •