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Step 9Calibration
There is nothing to calibrate, as microchip have already done that at the factory.
Immersing the sensor in a mixture of crushed ice and water gives an output of 500 millivolts, thus proving that my meter is accurate. Actually, the reading fluctuates a bit, this exact zero reading needs a bit of work with crushing ice and stirring it up to get to.
For occasional use, this sort of jury-rigged arrangement can be made to work. For a more professional instrument, an auxiliary circuit to subtract the .5 Volt offset could be incorporated, thus enabling the meter to show the temperature in degrees Celsius directly.
But that will be another project, all by itself.
Have Fun.
Immersing the sensor in a mixture of crushed ice and water gives an output of 500 millivolts, thus proving that my meter is accurate. Actually, the reading fluctuates a bit, this exact zero reading needs a bit of work with crushing ice and stirring it up to get to.
For occasional use, this sort of jury-rigged arrangement can be made to work. For a more professional instrument, an auxiliary circuit to subtract the .5 Volt offset could be incorporated, thus enabling the meter to show the temperature in degrees Celsius directly.
But that will be another project, all by itself.
Have Fun.
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