interpreting temperature logger data

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Interpreting Temperature Logger Data Changing Digitized Temperature Readings back into Temperatures

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Analog Temperature Readings to Digital Values Analog: 0 to 5 volts Digital: 0 to 255 D = (A/5) X 256 The PICAXE can convert any voltage between zero and five volts into a digital value between 0 and 255. This is a linear conversion, so zero volts becomes a digital zero, 2.5 volts becomes a digital 127 (or 128 depending on the accuracy of the 2.5 volts), and five volts becomes a digital 255. You can calculate the digital value of any analog voltage by dividing it by 5 And then multiply by 256. Since the PICAXE does not use decimal points, you need to round up the calculated value.

TRANSCRIPT

Page 1: Interpreting Temperature Logger Data

Interpreting Temperature Logger Data

Changing Digitized Temperature Readings back into Temperatures

Page 2: Interpreting Temperature Logger Data

Analog Temperature Readings to Digital Values

• Analog: 0 to 5 volts• Digital: 0 to 255

D = (A/5) X 256

Page 3: Interpreting Temperature Logger Data

The LM335 Temperature Sensor

• Temperature: 0 to 500 kelvins• Output: 0 to 5 volts

Page 4: Interpreting Temperature Logger Data

Four Temperature Scales

• Kelvin• Celsius• Fahrenheit• Rankin

Page 5: Interpreting Temperature Logger Data

Fahrenheit and Celsius

• There are 1.8 Fahrenheit degrees in 1 Celsius degree

• -40O Fahrenheit = -40O Celsius

Page 6: Interpreting Temperature Logger Data

Converting a Digitized Temperature back into Temperature

Temperature (k) = R/256 X 500

Page 7: Interpreting Temperature Logger Data

Spreadsheet Helper

Included with the Temperature Logger

Page 8: Interpreting Temperature Logger Data

Transferring Temperature Data into Notepad

• Temperature readings are not useful in the Terminal program

• Copy into Notepad using the Copy Input Buffer option

Page 9: Interpreting Temperature Logger Data
Page 10: Interpreting Temperature Logger Data

Editing Temperature Data

You get: 144,145,146,148

Edit to make it: 144145146148

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