Search results
Results from the WOW.Com Content Network
Although "International Temperature Scale of 1990" has the word "scale" in its title, this is a misnomer that can be misleading. The ITS-90 is not a scale; it is an equipment calibration standard. Temperatures measured with equipment calibrated per ITS-90 may be expressed using any temperature scale such as Celsius, Kelvin, Fahrenheit, or Rankine.
Scale of temperature is a methodology of calibrating the physical quantity temperature in metrology. Empirical scales measure temperature in relation to convenient and stable parameters or reference points , such as the freezing and boiling point of water .
Internationally agreed temperature scales are designed to approximate this closely, based on fixed points and interpolating thermometers. The most recent official temperature scale is the International Temperature Scale of 1990. It extends from 0.65 K (−272.5 °C; −458.5 °F) to approximately 1,358 K (1,085 °C; 1,985 °F).
Download as PDF; Printable version; ... also called resistance temperature detectors ... calibration must be performed at temperatures other than 0 °C and 100 °C ...
t ski = the skin temperature of the manikin; t eq = the equivalent temperature of the room (the calibration temperature) This factor may then be used to calculate equivalent temperature during further experiments in which radiant temperature and air velocity are not controlled using the equation: t eq = t ski – Q si / h cali
The formal definition of calibration by the International Bureau of Weights and Measures (BIPM) is the following: "Operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties (of the calibrated instrument or ...
Download as PDF; Printable version; ... length, mass, time, electric current, thermodynamic temperature, amount of ... Calibration laboratories are accredited and ...
The main advantages of this type of calibration are as follows: It is an absolute calibration. The use of standard materials for calibration is not necessary. The calibration can be performed at a constant temperature, in the heating mode and in the cooling mode. It can be applied to any experimental vessel volume. It is a very accurate ...