Found on YouTube at: www.youtube.com/watch?v=4t1C6T9LNCY
Calibration of Low-Temperature Infrared Thermometers (PDF 327KB).. Plus two.
From the website of the Measurement Standards Laboratory – MSL – of New Zealand comes this very useful and interesting, downloadable, free “Technical Guide” plus more. Of course, the term “Low Temperature” needs to be placed in context.
Here it assumes the use of popular devices designed for use in the –50 °C to 500 °C range (about -10°F to 1000 °F, but in practical terms, despite their calibration over a wider range, such devices are most widely used in the region of about -40 °C to about 150 °C (-40 °F to about 300 °F).
Also, most of the available devices are handheld, relatively low cost (less than a few hundred US Dollars and a lot less on websites like ebay.com) measure in the spectral range of about 8 to 10 microns (micrometers or ?m).
It is described as follows: Continue reading →