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Precise oven temperature control
Many technical oven applications, e.g. the hardening of casting
resign or bonding needs a temperature control that limits
the generated heat. When using simple ovens the control is
especially with low temperatures very bad solved. In the small
oven used in this sample, the set temperature of 60° Celsius
is exeeded by more than 100° C. This will damage most
plastik objects and even the USB-Temp was destroyed during
a session (see picture).
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A better oven temperature control could be realized by placing an USB-Temp
inside the oven and connecting oven power to an USB-Switch.
The controlling is then done by ClewareControl through the settig of switch points.
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A simple switch point at 60 ° C will help, but the temperature will
still exeed by 50° C. This is a result of the very simple
construction of this kind of low cost ovens. The corresponding
curve could be downloaded (Ofen2.cwc).
The display needs the program ClewareControl which could be
downloaded for free in the download area.
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By using two switch points the temperature of even such a simple oven could be
controlled with high accuracy. The first switch point at 30° C turns the
oven on if the temperature falls below. This is done to start a short heating phase.
The second switch point turn the oven on if the temperature falls below 60° C
and temperature continuously falling.
These settings results in a deviation of less than 3° C.
The protocol for download: Ofen3.cwc.
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