Introducing the DataGet Thermocouple
The DataGet thermocouple module combines a +/-0.2C accurate temperature reference with a 24 bit Analog Digital
Converter (ADC) to give you the most precise Palm based thermocouple reader.
All thermocouple readers must adjust for the local temperature. Inexpensive systems use a cheap transistor to “compensate” for the local temperature.
The DataGet cartridge uses a precision thermistor, hooked to our 24 bit ADC to adjust for local temperatures.
Thermocouples are not linear, and the electronics must compensate for this. Simple readers use a look up table to adjust for errors. These work well for some temperatures but are not so accurate at other temperatures.
DataGet software uses proprietary Chebyshev Polynomials to provide +/- 0.05 degree accuracy over the entire j and k thermocouple range. It also saves space on the handheld, and is fast to calculate.
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DataGet Thermocouple specifications
| A/D converter resolution (bits) |
24 |
| Thermistor accuracy |
+/- 0.2C |
Thermocouple temperature
range |
-200C(-328F) to
1250C(2282F) |
| Thermocouple types |
j,k |
| Jack type |
mini plug |
| Display units |
C or F |
| Active power |
<10mW |
| Shutdown power |
<400µW |
| Calibration points |
2 or 3 |
| Max sample rate |
<1 second |
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