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(kal-ă-bray -shŏn) A procedure carried out on a measuring instrument, such as a radio telescope, by means of which the magnitude of its response is determined as a function of the magnitude of the input signal. The calibration of a radio telescope provides an absolute scale of the output deflection against antenna temperature.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006


Process of adjusting equipment to ensure that operation is within design parameters.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a metrological operation by which an instrument of measurement (a standard or measuring device) is equipped with a scale or a calibration chart (curve). The graduations on the scale must correspond with the required accuracy to the values of the quantity being measured; the chart (curve) must reflect with similar accuracy the connection between the magnitude produced at the output of the device and the magnitude affecting the input—for example, the dependence of the electromotive force of a pyrometer’s thermocouple on the temperature of the operating junction. Calibrations are made by means of measurement that are more precise than the means of measurement being calibrated; the actual values of the measured quantity are established from the more precise means of measurement. Accurate means of measurement are calibrated individually; the less accurate ones are supplied with a standard scale printed beforehand or a standard calibration chart (curve). The use of such scales and standard calibration charts may at times make it necessary to regulate the means of measurement in order to reduce the error to some established norm.




verification of a measure or set of measures by taking a group of measurements.

Calibration consists in determining the error or correction of a group of gauges (such as a set of weights) or of a single multivalent gauge (such as a linear scale) for various combinations of the gauge or for various ranges of the scale. A comparison is made of the measures or of the sections of the scale in which one of the measures or scale values is taken as the basis of comparison.


Malikov, M. F. Osnovy metrologii, part 1. Moscow, 1949.
Amatuni, A. N. “Kalibrovka podrazdelenii shtrikhovykh mer.” In En-tsiklopediia izmerenii, kontrolia iavtomatiki (EIKA), issue 6. Moscow-Leningrad, 1966. Page 33.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


To adjust or bring into balance. Scanners, CRTs and similar peripherals may require periodic adjustment. Unlike digital devices, the electronic components within these analog devices may change from their original specification. See TV calibration, color calibration and tweak.

color calibration

The matching of colors to a base color, such as a Pantone color, or from one device to another. Color calibration is widely used in print publishing in order to display on screen an accurate representation of the colors that will be printed on paper. Monitors use red, green and blue (RGB) to display the color gamut, while printers use cyan, magenta, yellow and black (CMYK) inks. See TV calibration, color gamut and color correction.

The SpectroCalibrator
Light Source's Colortron Color System includes this color calibrator, which is used to accurately determine the color from a sample. Using suction cups, it attaches to the monitor screen to calibrate the monitor so that designers see true representations of the final colors on screen. (Image courtesy of Light Source, Inc.)

TV calibration

Adjusting the color and contrast on a flat panel TV that has been in use approximately 100 hours. In order to display content as originally intended, separate adjustments must be made for each source, typically the cable box and the DVD or Blu-ray player.

Calibration Discs and ISF Certification
Calibration DVDs are widely available for consumers and professionals. By following the instructions on the disc, adjustments can be made. However, the TV's setup menus can be complicated, and the wrong adjustment can render the TV inoperable.

Consumers often opt for a professional calibration by people who have been certified by the Imaging Science Foundation (ISF). They come into the home with analyzer and test pattern equipment and are able to make fine adjustments that the user cannot. See color calibration.
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References in periodicals archive ?
The North American calibration services market is expected to grow steadily in the next seven years, driven by the greater complexity of instruments and stricter regulations, while demand for more quality products, market consolidation, and evolution of Industrial Internet of Things will propel the European calibration and repair services market.
Setup for Actuator-Assisted Calibration. The purpose of actuator-assisted calibration was to facilitate imaging of multiple point targets over the entire image region in a systematic and time-efficient way.
Several instrument makers offer in-situ calibration and verification, and all work in a similar fashion.
This new approach could move the calibration process from one based on pre-defined re-calibration intervals to one that is condition-based.
Land Instrument's UKAS laboratory carries out the traceable calibration of Radiation Thermometers over the range -10[degrees]C up to 2500[degrees]C.
When performing a pH calibration it's recommended to calibrate to at least two points.
the calibration only change the parameters that has significant affect to the end result of the calculation.
Using the Labcell calibration service enables customers to benefit from the latest firmware updates, avoid the inconvenience and costs associated with unexpected repairs and maintenance, and meet requirements relating to quality assurance and auditing.
The existing method was a multianalyte assay that involved the addition of a calibration solution containing deuterated internal standards (ISs) for 4 TCAs (amitriptyline, desipramine, imipramine, and NT) (15), but same chromatographic method was also used for a NT-only assay for the purposes of the current study.
3 different camera calibration methods characterised by the used reference object and the time and location of calibration can be introduced (Suziedelyte-Visockiene, Brucas 2009a):
Following the acquisition of their building on the Viking Industrial Park, South Tyneside, and the interior refurbishment designed specifically as a "one-stop" calibration facility, TSL now lead the way for privately-run laboratories in the North.