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Thread: melted temperature probe

  1. #1
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    melted temperature probe

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    For those of you using the new CS USB digital multimeter, you may want to ensure that the black plastic part of the probe isnt too close to your heat gun. I just did my first roast with my new DMM, and was watching the temperature climb nicely to just over 200C, when suddenly it dropped back to 16C. Id melted the connection between the flexible cord and the probe!

    Ive ordered a replacement :-)

    Next time, Ill make sure that the probe is further away from the heat gun in the bread machine.

    At least the resulting roast still looks OK, Ill give it a taste tomorrow.

    Cheers, Tridge

  2. #2
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    Re: melted temperature probe

    Hi Andrew,
    Should be repairable, if not attractive, dont bin it.
    Lindsay

  3. #3
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    Re: melted temperature probe

    i drill through the side of the BM so that the only part of the probe exposed to the heat is the metal, all plastic remains on the outside of the BM

    Mal

  4. #4
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    Re: melted temperature probe

    Ill need to get permission from my wife before I start drilling holes in the BM. So far Ive told her we could still make bread with it :-)

    I wonder if its possible to order replacement pans for Breville breadmakers somewhere? Then I could have one with a hole and one without.

    Cheers, Tridge

  5. #5
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    Re: melted temperature probe

    Quote Originally Posted by 606562687F6D757E6D0C0 link=1250666544/1#1 date=1250667813
    Hi Andrew,
    Should be repairable, if not attractive, dont bin it.
    Lindsay
    yep, I dug around a bit in the garage and found a soldering iron from my uni days. I managed to solder it back together, and it seems to work. Ive still got another one on order though as a backup.

    I wonder if Jaycar has any solder that melts well above coffee roasting temperatures? I suspect this probe used ordinary solder and melted as soon as it got close to 200C.

    Cheers, Tridge

  6. #6
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    Re: melted temperature probe

    Hi Tridge,

    I havent had a total failure yet but my TC probe and Digitech QM1320 meter become unstable above around 200C and 10 or 15 minutes into their job of work, this is very annoying, I suspect it is associated with the meter switching to sleeper mode but apart from, switch it off/then on again, I dont know what to do about it.
    Fortunately my $10 Chinese turkey thermometer has been a reliable and a solid performer (touch wood).
    Last time I was in conversation with Andy he recommended shielding the TC probe shaft with tightly wrapped paper to reduce heat flow into the shaft and plastic moulding.
    I have adopted this suggestion, which Im sure is helpful, but it hasnt reduced my instability problems with the TC and QM1320 meter.
    I suggest that that you adopt the tight rolled paper heat shield to help avoid any repeat of your melt down.
    Another thought which may further reduce the likelihood of another melt down is to avoid direct contact of the heat gun outflow and the temp-sensing probe. I use a piece of aluminium sheet to isolate direct HG outflow air with the probe.

    Kind Regards
    Lindsay

  7. #7
    Senior Member redzone121's Avatar
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    Re: melted temperature probe

    Quote Originally Posted by 787E65686B690C0 link=1250666544/3#3 date=1250682836
    Ill need to get permission from my wife before I start drilling holes in the BM. So far Ive told her we could still make bread with it
    I said that once ( I meant it at the time) ;D

  8. #8
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    Re: melted temperature probe

    Quote Originally Posted by 6770716F7A7B70242724150 link=1250666544/6#6 date=1250712838
    I said that once ( I meant it at the time) *;D
    My wife has now kindly assented to me drilling a hole in the pan, so my probe is now stuck through the side, which also keeps it nicely in place while roasting.

    Its only a small hole, so hopefully not too much dough will leak out if this machine gets used for its original purpose again :-)

    Cheers, Tridge

  9. #9
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    Re: melted temperature probe

    Quote Originally Posted by 52544F424143260 link=1250666544/3#3 date=1250682836
    So far Ive told her we could still make bread with it
    Hey Tridge,
    I personally prolly wouldnt be making bread with ya BM after roasting greens, prolly nothing medically wrong with it, just thinking of all the coffee oils and god knows what else that comes out of the beans from all over the globe, at these temps, pesticides, fertilizers etc (i know they shouldnt, but....)

    Im very lucky to have a girlfriend who is an amazing cook ;) and fortunately for me kneading dough manually actually relaxes her, so modding the bread maker wasnt an issue.

    Just a thought.....

  10. #10
    A_M
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    Re: melted temperature probe

    Quote Originally Posted by 12163029292C33242B450 link=1250666544/8#8 date=1250721900
    Quote Originally Posted by 52544F424143260 link=1250666544/3#3 date=1250682836
    So far Ive told her we could still make bread with it *
    Hey Tridge,
    I personally prolly wouldnt be making bread with ya BM after roasting greens, prolly nothing medically wrong with it, just thinking of all the coffee oils and god knows what else that comes out of the beans from all over the globe, at these temps, pesticides, fertilizers etc (i know they shouldnt, but....)

    Im very lucky to have a girlfriend who is an amazing cook ;) and fortunately for me kneading [s]dough[/s] (insert what ya hart desires) manually actually relaxes her, so modding the bread maker wasnt an issue.

    Just a thought.....
    I had to re read that more than once *;D

  11. #11
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    Re: melted temperature probe

    Behmor Coffee Roaster
    Ha Ha, buggar off AM...... ;D I had a laugh



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