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Precision temperature measurement

Posted on Thursday, September 12th, 2013 in measurement, sensors by DP

photo-3

Scott Harden writes:

In an effort to resume previous work [A, B, C, D] on developing a crystal oven for radio frequency transmitter / receiver stabilization purposes, the first step for me was to create a device to accurately measure and log temperature.

Check out the video after the break.

This entry was posted on Thursday, September 12th, 2013 at 1:00 pm and is filed under measurement, sensors. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

4 Responses to “Precision temperature measurement”

  1. Josh says:

    Are we confusing uncertainty and resolution?

    Being able to measure the temperature down to 0.01F isn’t much use if the calibrated temperature error is around 0.3C according to the datasheet.

  2. JBeale says:

    If you are stabilizing a crystal, you probably care much more about temperature drift than the absolute temperature accuracy. In that case, the more resolution the better, even if the absolute calibration is not great.

  3. Jon Fleig says:

    You might enjoy looking at Jim Williams’ Application Note 12 October 1985
    Circuit Techniques for Clock Sources

    http://cds.linear.com/docs/en/application-note/an12fa.pdf

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