type k and ADC-16

 
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PostPosted: Fri Jan 06, 2006 8:28 am    Post subject: type k and ADC-16 Reply with quote
Hi

I am trying to use some type k thermocouples with an ADC-16.

When I set up the software to use the thermocouple, I see a temperature registered, and the temperature rises if I touch the thermocouple. However the temperature is given as very close to 0 deg C. Can you suggest what I am doing wrong?
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Michael
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Joined: 07 Jul 2005
Posts: 93
Location: St Neots, Cambridgeshire
PostPosted: Fri Jan 06, 2006 12:20 pm    Post subject: Reply with quote
Hello,

The ADC16 is a high resolution(16bit) data logger. However, it does not directly support thermocouples. You will need to amplify the signal.
The AD595 IC is an integrated thermocouple instrumentation amplifier with built-in cold junction compensation. This is not the simplest of ways to measure temperature and great care should be taken with the
circuitry. A lookup table must be used in PicoLog since the AD595 output voltage is not linear with temperature. Further information is available upon request.

Best regards,
Michael
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