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TempTell Reflower
$245 |
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Add to Cart |
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Reflower Specifications:
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| TempTell Reflower is a device that controls a standard toaster oven to perform prototype and small batch surface mount solder reflowing operations. The reflow temperature profile is customizable through its RS-232 interface to fit the user's requirements. TempTell Reflower comes with a 36" bare junction thermocouple and a cable to connect to a standard PC com port. |
The Reflower can perform 3 types of cycles:
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| The Reflower will accept commands through its RS-232 port to set the parameters for the programable temperature profile. The following parameters can be set: |
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The Reflower monitors the temperature of the PCB being reflowed and controls the temperature according to the user-defined parameters. The toaster oven is plugged into the outlet on the Reflower, and the temperature probe is placed on the PCB. The Reflower will then control the oven temperature to attain the user-specified reflow profile. The user can define the reflow profile by specifying the slope of the drying ramp, the drying temperature, the drying time, the reflow ramp slope, the reflow temperature, the reflow time and the cooling ramp or time. |
| The Reflower is calibrated during initial set-up for optimal performance with the specific oven being used. |
| Download the TempTell Reflower manual for more details on the operation of the TempTell Reflower. |
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| The Reflower provides better control over the oven's temperature profile than the temperature indicator sticks typically used in toaster oven SMT reflow applications. The Reflower provides for a programable drying time which allows the flux sufficient time to work before progressing to the reflow stage. The Reflower also controls the time spent at the reflow temperature to help ensure your parts are maintained within their temperature specifications. |
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| This is the temperature ramp-up profile of a standard Proctor Silex toaster oven set to 450 degrees Fahrenheit. Note the 75 degree overshoot before it settles back to 450 degrees. |
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| This is the same toaster oven being controlled by a TempTell Reflower. |
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| Testing with the Reflower and a number of different ovens shows that while many ovens can successfully reflow PCBs, heat is not distributed evenly within a standard toaster oven. Areas very close to the rear wall of the oven tend to be a little cooler than the center of the oven, and areas near the front glass can be up to 20 degrees C cooler than the center of the oven. A convection oven tends to help by moving the heated air around over the PCB to eliminate these cold spots. For more information on how convection ovens work take a look at the Physics Central article. |
| All convection ovens are not created equally, however. Of the ovens tested, one was not able to reach the reflow temperature after 15 minutes. Another could reach the reflow temperature, but took too long to get there. A third could get to the reflow temperature adequately, but did not move enough air to eliminate the cold spots. The best oven tested to date is the Euro-Pro TO289, a small oven with a relatively powerful fan. It does not completely eliminate the cool spot near the glass door, but is the best tested so far. While the search for the 'best' convection oven continues, the TO289 will do a good job of reflowing SMT boards as long as you keep the board back an inch or so from the glass door. You can find them online for about $50 at Shopping.com or JC Penney or Target stores. |
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Copyright © 2005 http://www.ArticulationLLC.com - All Rights Reserved. |
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This web site was last updated on 9/23/2005 | |
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