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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Oven thermostat question
Would anyone happen to know, in a typical oven thermostat set at
say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. |
#2
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Oven thermostat question
On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote:
Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. Unlikely to be better than +/- 5% (17 deg). Possibly no better than +/- 10% (35 deg). Certainly subject to variation depending on age and technology used. An electric oven could possibly have better control than a gas oven (if PWM used to modulate the heating elements). Do an online search for specs on various brands. Is Jenn-Air better than Kenmore or GE? John |
#3
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Oven thermostat question
On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote:
Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. I don't konw if this helps, but you can adjust the electric oven control on GE and probably all electric ovens now. For non-electroncially controlled ovens, I'm sure the method is the same for all of them -- it's part of the operating instructions for each model --, and I'll bet there's a method for electronically controlled too. It would be a step backwards if there weren't. |
#4
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Oven thermostat question
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#5
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Oven thermostat question
mm wrote in
: On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? I don't konw if this helps, but you can adjust the electric oven control on GE and probably all electric ovens now. For non-electroncially controlled ovens, I'm sure the method is the same for all of them -- it's part of the operating instructions for each model --, and I'll bet there's a method for electronically controlled too. It would be a step backwards if there weren't. It makes sense that new models would be better, but I'm not sure it would have occurred to me if you handn't troubled to respond. Thanks for the help. Jesse |
#6
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Oven thermostat question
On Sat, 14 May 2011 17:09:04 GMT, Jesse wrote:
mm wrote in : On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? I don't konw if this helps, but you can adjust the electric oven control on GE and probably all electric ovens now. LOL at myself. By "now" I meant as opposed to 31+ years ago. I'm not even sure about then, but my oven from only 30 years ago, that I just replaced because of a grease fire, could have the temperature calibrated by the owner, with a simple screwdriver. And my "new" oven from 20 years ago, also non-digital, also had the instructions in owners manual. What about microwave ovens? I'll start a new thread. For non-electroncially controlled ovens, I'm sure the method is the same for all of them -- it's part of the operating instructions for each model --, and I'll bet there's a method for electronically controlled too. It would be a step backwards if there weren't. It makes sense that new models would be better, but I'm not sure it would have occurred to me if you handn't troubled to respond. That's very nice. Glad to hear it. Thanks for the help. You're welcome. Jesse |
#7
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Oven thermostat question
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#8
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Oven thermostat question
On May 16, 10:04*am, Smitty Two wrote:
In article , wrote: On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. Unlikely to be better than +/- 5% (17 deg). *Possibly no better than +/- 10% (35 deg). Certainly subject to variation depending on age and technology used. An electric oven could possibly have better control than a gas oven (if PWM used to modulate the heating elements). Do an online search for specs on various brands. *Is Jenn-Air better than Kenmore or GE? John The OP is asking about the size of the hysteresis band, not the accuracy of the control. Two entirely different things. And what mm was talking about was also an accuracy adjustment -- surely there is no user option to adjust hysteresis.- Hide quoted text - - Show quoted text - Further to your comments, Smitty, there is the hysteresis band of the actual thermostat PLUS the significant delay in the heat from the element [which is also slow heating an cooling] getting from the bottom of the oven up to where the sensor usually is at the top. In the occasional tests I have done using a thermocouple [fairly fast responding] a measurement on the shelf in mid oven swings 30 or more degrees F as the element cycles. Neil S. |
#9
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Oven thermostat question
On May 16, 11:16*am, nesesu wrote:
On May 16, 10:04*am, Smitty Two wrote: In article , wrote: On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? .... The OP is asking about the size of the hysteresis band, not the accuracy of the control. Two entirely different things. And what mm was talking about was also an accuracy adjustment -- surely there is no user option to adjust hysteresis Further to your comments, Smitty, there is the hysteresis band of the actual thermostat PLUS the significant delay in the heat from the element [which is also slow heating an cooling] getting from the bottom of the oven up to where the sensor usually is at the top. *In the occasional tests I have done using a thermocouple [fairly fast responding] a measurement on the shelf in mid oven swings 30 or more degrees F as the element cycles. We used to take nine-point profiles of our little industrial ovens; it never occurred to me to profile a cooking oven. Digital oven thermometers are cheap -- the OP might want to answer his own question and get back to the group. |
#10
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Oven thermostat question
nesesu wrote:
On May 16, 10:04?am, Smitty Two wrote: In article , wrote: On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. Unlikely to be better than +/- 5% (17 deg). ?Possibly no better than +/- 10% (35 deg). Certainly subject to variation depending on age and technology used. An electric oven could possibly have better control than a gas oven (if PWM used to modulate the heating elements). Do an online search for specs on various brands. ?Is Jenn-Air better than Kenmore or GE? John The OP is asking about the size of the hysteresis band, not the accuracy of the control. Two entirely different things. And what mm was talking about was also an accuracy adjustment -- surely there is no user option to adjust hysteresis.- Hide quoted text - - Show quoted text - Further to your comments, Smitty, there is the hysteresis band of the actual thermostat PLUS the significant delay in the heat from the element [which is also slow heating an cooling] getting from the bottom of the oven up to where the sensor usually is at the top. In the occasional tests I have done using a thermocouple [fairly fast responding] a measurement on the shelf in mid oven swings 30 or more degrees F as the element cycles. Neil S. How long did each temperature cycle take, assuming this 30 or so degrees swing? |
#11
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Oven thermostat question
On May 16, 3:44*pm, Cydrome Leader wrote:
nesesu wrote: On May 16, 10:04?am, Smitty Two wrote: In article , wrote: On Fri, 13 May 2011 21:55:13 GMT, Jesse wrote: Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. Unlikely to be better than +/- 5% (17 deg). ?Possibly no better than +/- 10% (35 deg). Certainly subject to variation depending on age and technology used. An electric oven could possibly have better control than a gas oven (if PWM used to modulate the heating elements). Do an online search for specs on various brands. ?Is Jenn-Air better than Kenmore or GE? John The OP is asking about the size of the hysteresis band, not the accuracy of the control. Two entirely different things. And what mm was talking about was also an accuracy adjustment -- surely there is no user option to adjust hysteresis.- Hide quoted text - - Show quoted text - Further to your comments, Smitty, there is the hysteresis band of the actual thermostat PLUS the significant delay in the heat from the element [which is also slow heating an cooling] getting from the bottom of the oven up to where the sensor usually is at the top. In the occasional tests I have done using a thermocouple [fairly fast responding] a measurement on the shelf in mid oven swings 30 or more degrees F as the element cycles. Neil S. How long did each temperature cycle take, assuming this 30 or so degrees swing?- Hide quoted text - - Show quoted text - That sort of swing happened every time that the thermostat cycled which was dependant on the heat loss, oven temperature and mass being baked. Presumably a convection oven would have much tighter control of gradient in the chamber with a fan blowing the hot air around. Neil S. |
#12
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Oven thermostat question
On 5/13/2011 5:55 PM, Jesse wrote:
Would anyone happen to know, in a typical oven thermostat set at say 350 degrees, when it would usually kick on? At 345? At 340? Lower? And what would usually be the overshoot? Would it hit a high of 350? Or even higher? I'm sure these figures vary somewhat model to model. I'm just looking for a ball park figure. Thanks. Mechanical or electronic thermostat? Big difference likely. -- I'm never going to grow up. |
#13
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Oven thermostat question
PeterD wrote:
Mechanical or electronic thermostat? Big difference likely. When verifying the calibration of a thermostat, the interval between the hash marks on the dial is the tolerance; e.g. if the last mark passed is 350 and the next mark is 375, the expected reading is considered to be 350 +/-25. |
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