Your thoughts on ideal stack temperatures

Diabel Posted By Diabel, Nov 12, 2008 at 6:58 AM

Thread Status:
Not open for further replies.
  1. 3fordasho

    3fordasho
    Minister of Fire 2.
    NULL
    

    Jul 20, 2007
    601
    73
    Loc:
    South Central Minnesota

    I have double wall from the stove to the class A insulated so I don't think my external (surface) thermometer will read correctly, plus my straight sections are telescoping (adjustable) sections so in reality they are more than double wall. I am curious though as my temp readings seem lower than everyone elses. When I get a chance I'll try an industrial digital readout temp controller I have laying around, it has an external j-type thermocouple I could stick into the flue easy enough.

    And just for clarification, the internal flue is reading 200-250F with the fireview loaded, cat engaged, air inlet between 3/4-1, and reaching stove top temps of 400-525F.
     
  2. 3fordasho

    3fordasho
    Minister of Fire 2.
    NULL
    

    Jul 20, 2007
    601
    73
    Loc:
    South Central Minnesota

    Just checked flue temps- tel-tru was reading 230f. unscrewed it and placed in a j-type thermocouple connected to a omron temp controller. It reads a good 100f higher. So much for the accuracy of the tel-tru or could it be the ONE time l left the air wide open for too long and the guage was pegged at 1000F... doh

    At least I can stop worrying about burning too cool and having a creosote factory.
     
  3. Todd

    Todd
    Minister of Fire 2.
    NULL
    

    Nov 19, 2005
    9,229
    346
    Loc:
    Lake Wissota
    Don't feel bad, my Condar probe was way off last year. It was never the same after it got too hot, It was way off and by the time I threw it away the thing would just continue to climb in temp til it pegged out. I don't know if I'll ever trust an internal anymore, I'm sticking to the external one now.
     
  4. bsa0021

    bsa0021
    Feeling the Heat 2.
    NULL
    

    Oct 1, 2008
    405
    5
    Loc:
    Ohio
    Just checked flue temps- tel-tru was reading 230f. unscrewed it and placed in a j-type thermocouple connected to a omron temp controller. It reads a good 100f higher. So much for the accuracy of the tel-tru or could it be the ONE time l left the air wide open for too long and the guage was pegged at 1000F... doh

    At least I can stop worrying about burning too cool and having a creosote factory.[/quote]




    3fordasho: You have to watch those Tel-tru thermometers. They are adjustable and the tolerance (stiffness)for adjustment is pretty loose. I prefer a different brand (I think hamilton) but you still have to be carefull not to turn the head. I finally spent the money at work for digitals to keep me out of hot water...don't ask.
    Best way to calibrate and required in (food processing) any thermometer is with a certified mercury thermometer. Bob
     
  5. 3fordasho

    3fordasho
    Minister of Fire 2.
    NULL
    

    Jul 20, 2007
    601
    73
    Loc:
    South Central Minnesota



    3fordasho: You have to watch those Tel-tru thermometers. They are adjustable and the tolerance (stiffness)for adjustment is pretty loose. I prefer a different brand (I think hamilton) but you still have to be carefull not to turn the head. I finally spent the money at work for digitals to keep me out of hot water...don't ask.
    Best way to calibrate and required in (food processing) any thermometer is with a certified mercury thermometer. Bob[/quote]



    Thanks for the info, I know certain models are adjustable (have a set screw that you loosen to adjust) but mine does not have the set screw. I am guilty of threading it in and out using the head instead of the hex nut so perhaps I have caused my own problems? If in fact the head has moved in relation to the needle, I will try to recalibrate it.
     
  6. bsa0021

    bsa0021
    Feeling the Heat 2.
    NULL
    

    Oct 1, 2008
    405
    5
    Loc:
    Ohio


    Thanks for the info, I know certain models are adjustable (have a set screw that you loosen to adjust) but mine does not have the set screw. I am guilty of threading it in and out using the head instead of the hex nut so perhaps I have caused my own problems? If in fact the head has moved in relation to the needle, I will try to recalibrate it.[/quote]

    The hex nut is the adjuster. Hold the nut w/pliers and turn the head to match a mercury thermometer (or good known source) immersed in water.
     
  7. M1sterM

    M1sterM
    Member 2.
    NULL
    

    Aug 21, 2008
    148
    2
    Loc:
    Northcountry
    It's rated to tolerate up to 2100 degrees on 3 seperate occasions (e.g. after 3 chimney fires, time to replace it). It's only rated to 1000 on a continuous basis.
     
  8. Wrigley

    Wrigley
    New Member 2.
    NULL
    

    Jul 26, 2008
    37
    0
    Loc:
    Berkshires
    Thanks for the clarification -- with my old Morso 1125 I try to burn a bit on the hot side to minimize creosote and smoke, with stack temps around 500 early in the burn cycle. So that should still be alright for continuous use ....
     
Thread Status:
Not open for further replies.

Share This Page