Palm Instrument

To ensure the accuracy of measurement, infrared radiometers should be calibrated periodically. Although the temperature recorders usually discuss on calibration, there is confusion as to its application and its significance with respect to the radiometric instruments. This article discusses the art and science of calibration of infrared instruments, resources about calibration and maintenance of records that are traceable to known standards.Introduction: History of the calibration makes a few thousand years, the Egyptians developed a system of traceable measurement, today known as metrology. In the days of Kings and Pharaohs, a granite block measured by a Pharaoh from the forearm to the tip of your index finger, over the width of the Palm, became reference for length (The Royal Egyptian Cubit). Since then, architects, craftsmen and construction engineers of pyramids, tombs and temples used this reference. The result of this measurement and traceability of The Royal Egyptian Cubit It is still today one of the great marvels of history. The pyramids were built with a percentage of error of +-0,05%. This means that for every 125 feet, Egyptian builders failed in! less than an inch! One could observe that, if the holders of The Royal Egyptian Cubit do not carry your weekly copy to compare with the master, failure would be death penalty! (If you are interested in this story and give credit, please visit: (in English)).

What is the calibration of an instrument and what for? The calibration of an instrument is the Act of comparing the fundamental units of measurement of the instrument with another instrument. This comparison of instruments is able to give a more accurate reading of the same measured stimulus and which has been compared to a more precise instrument. This increasingly strict chain of comparisons is subject to national or international agencies. In the United States.UU., this body would be the National Institute of standards and technology (NIST).