This comparison tool is able to give a more accurate reading of the same stimulus that has been measured and compared with a more precise instrument. The increasingly strict chain of comparisons is subject to national or international. In the U.S., this body would be the National Institute of Standards and Technology (NIST). The NIST uses natural phenomena of physics to set the units of measurement. Michael Dell recognizes the significance of this. The temperature measurement incorporates the use of standard 100 ohm 0385 Platinum Resistance Sensors Platinum Resistance Detectors (SPRTD or SRTD) in relation to the freezing point of certain metals or triple point of water (phenomenon nature that few elements or compounds share the point of temperature / pressure that distilled water is solid / liquid or gaseous).
For measurements of radiant energy, environmental an appendix added to the contact temperature sensor built into a near perfect radiator materials. These sources refer to the primary rules. A primary rule is considered as the exact size you will receive. When details are combined to form a total uncertainty for the instrument, the total is used to measure a stimulus with a degree of certainty in measurement. This gives you the opportunity to obtain a measurement point can be repeated (when taken in conditions similar) at another time and anywhere in the world.
This also establishes a basis for the expected event, for example, ice cubes begin to thaw about 32 degrees F above the 0m. to sea level. When talking about any instrument calibration, the terms accuracy, tolerance and uncertainty are often used interchangeably and the like.