Z-factor - Revision history

en>Rjwilmsi: /* Limitations */Journal cites, added 1 PMID using AWB (9944)

2014-03-16T07:13:16Z

Limitations: Journal cites, added 1 PMID using AWB (9944)

← Older revision		Revision as of 09:13, 16 March 2014
Line 1:		Line 1:
	~~The '''Callendar–Van Dusen equation''' is an equation that describes the relationship between resistance (R) and temperature (t) of [[platinum]] [[resistance thermometers]] (RTD).~~		Greetings. Let me begin by telling you the writer's name - Phebe. One of the things she loves most is to study comics and she'll be starting something else along with it. Bookkeeping is what I do. For a while I've been in South Dakota and my mothers and fathers live close by.<br><br>My web site [http://www.gaysphere.net/user/KJGI home std test kit]

	~~As commonly used for commercial applications of RTD thermometers [http://www~~.~~honeywell-sensor.com.cn/prodinfo/sensor_temperature/technical/c15_136.pdf example here], the relationship between resistance and temperature is given~~ by the ~~following equations~~. ~~The relationship above 0 °C (up to~~ the ~~melting point of aluminum ~ 660 °C)~~ is ~~a simplification of the equation that holds over a broader range down~~ to ~~-200 °C. The longer form was published in 1925 (see below) by M.S. Van Dusen~~ and ~~is given as:~~

	~~:<math>R(t) = R(0) [ 1 + At + Bt^2 + (t - 100)C*t^3].</math>~~

	~~While the simpler form was published earlier by Callendar,~~ it ~~is generally valid only over the range between 0 °C to 661 °C and is given as:~~

	~~:<math>R(t) = R(0) ( 1 + At + Bt^2).</math>~~

	~~Where constants A, B, and C are derived from experimentally determined parameters α, β, and δ using resistance measurements made at 0 °C, 100 °C and 260 °C~~.

	It is important to note that these equations are listed as the basis for the temperature/resistance tables for idealized platinum resistance thermometers and are not intended to be used for the calibration of an individual thermometer, which would require the experimentally determined parameters to be found.

	~~These equations are cited~~ in International Standards for platinum RTD's resistance versus temperature functions [http://www.dke.din.de/cmd?level=tpl-art-detailansicht&committeeid=54738887&subcommitteeid=54758337&artid=115799593&bcrumblevel=1&JSESSIONID=491375033F4082A363BB3755D3CA745B.3&languageid=de DIN/IEC 60751 (also called IEC 751)], also adopted as [http://shop.bsigroup.com/en/ProductDetail/?pid=000000000000126916 BS-1904], and ~~with some modification, JIS C1604.~~

	~~The equation was found by British physicist [[Hugh Longbourne Callendar]],~~ and ~~refined for measurements at lower temperatures~~ by M. ~~S. Van Dusen, a chemist at the U.S. National Bureau of Standards (now known as the [[National Institute of Standards and Technology]] ) in work published in 1925 in the~~ [http://~~pubs~~.~~acs~~.~~org~~/~~doi~~/~~pdf/10.1021/ja01679a007 Journal of the American Chemical Society].~~

	Starting in 1968, the Callendar-Van Dusen Equation was replaced by an interpolating formula given by a 20th order polynomial first published in the [http://iopscience.iop.org/0026-1394/5/2/001/pdf/0026-1394_5_2_001.pdf The International Practical Temperature Scale of 1968] by the Comité International des Poids et Mesures.

	Starting in 1990, the interpolating formula was further refined with the publication of the [http://iopscience.iop.org/0026-1394/27/1/002/pdf/0026-1394_27_1_002.pdf The International Temperature Scale of 1990]. The [[ITS-90]] is published by the Comité Consultatif de Thermométrie and the Comité International des Poids et Mesures. This work provides a 12th order polynomial that is valid over an even broader temperature range that spans from 13.8033 K to 273.16 K and a second 9th order polynomial that is valid over the temperature range of 0 °C to 961.78 °C.

	~~{{DEFAULTSORT:Callendar-Van Dusen equation}}~~
	~~[[Category:Thermometry]]~~
	~~[[Category:Equations]~~]

en>Rjwilmsi: /* Limitations */Journal cites, using AWB (9901)

2014-02-02T08:03:31Z

Limitations: Journal cites, using AWB (9901)

← Older revision		Revision as of 10:03, 2 February 2014
Line 1:		Line 1:
	The ~~writer~~ is ~~known as Irwin Wunder but it's not~~ the ~~most masucline title out there~~. ~~Hiring~~ is ~~her day job now but she's always wanted her personal company~~. ~~My family members life~~ in ~~Minnesota~~ and ~~my family members enjoys~~ it~~. Body building~~ is ~~1 of~~ the ~~issues I adore most.~~<br><br>~~My web page~~ at ~~home std testing (~~[http://www.zs-~~imports~~.com/~~blogs~~/~~post~~/~~70017 best site~~])		The '''Callendar–Van Dusen equation''' is an equation that describes the relationship between resistance (R) and temperature (t) of [[platinum]] [[resistance thermometers]] (RTD).

			As commonly used for commercial applications of RTD thermometers [http://www.honeywell-sensor.com.cn/prodinfo/sensor_temperature/technical/c15_136.pdf example here], the relationship between resistance and temperature is given by the following equations. The relationship above 0 °C (up to the melting point of aluminum ~ 660 °C) is a simplification of the equation that holds over a broader range down to -200 °C. The longer form was published in 1925 (see below) by M.S. Van Dusen and is given as:

			:<math>R(t) = R(0) [ 1 + At + Bt^2 + (t - 100)C*t^3].</math>

			While the simpler form was published earlier by Callendar, it is generally valid only over the range between 0 °C to 661 °C and is given as:

			:<math>R(t) = R(0) ( 1 + At + Bt^2).</math>

			Where constants A, B, and C are derived from experimentally determined parameters α, β, and δ using resistance measurements made at 0 °C, 100 °C and 260 °C.

			It is important to note that these equations are listed as the basis for the temperature/resistance tables for idealized platinum resistance thermometers and are not intended to be used for the calibration of an individual thermometer, which would require the experimentally determined parameters to be found.

			These equations are cited in International Standards for platinum RTD's resistance versus temperature functions [http://www.dke.din.de/cmd?level=tpl-art-detailansicht&committeeid=54738887&subcommitteeid=54758337&artid=115799593&bcrumblevel=1&JSESSIONID=491375033F4082A363BB3755D3CA745B.3&languageid=de DIN/IEC 60751 (also called IEC 751)], also adopted as [http://shop.bsigroup.com/en/ProductDetail/?pid=000000000000126916 BS-1904], and with some modification, JIS C1604.

			The equation was found by British physicist [[Hugh Longbourne Callendar]], and refined for measurements at lower temperatures by M. S. Van Dusen, a chemist at the U.S. National Bureau of Standards (now known as the [[National Institute of Standards and Technology]] ) in work published in 1925 in the [http://pubs.acs.org/doi/pdf/10.1021/ja01679a007 Journal of the American Chemical Society].

			Starting in 1968, the Callendar-Van Dusen Equation was replaced by an interpolating formula given by a 20th order polynomial first published in the [http://iopscience.iop.org/0026-1394/5/2/001/pdf/0026-1394_5_2_001.pdf The International Practical Temperature Scale of 1968] by the Comité International des Poids et Mesures.

			Starting in 1990, the interpolating formula was further refined with the publication of the [http://iopscience.iop.org/0026-1394/27/1/002/pdf/0026-1394_27_1_002.pdf The International Temperature Scale of 1990]. The [[ITS-90]] is published by the Comité Consultatif de Thermométrie and the Comité International des Poids et Mesures. This work provides a 12th order polynomial that is valid over an even broader temperature range that spans from 13.8033 K to 273.16 K and a second 9th order polynomial that is valid over the temperature range of 0 °C to 961.78 °C.

			{{DEFAULTSORT:Callendar-Van Dusen equation}}
			[[Category:Thermometry]]
			[[Category:Equations]]

en>ZéroBot: r2.7.1) (Robot: Adding de:Z-Faktor

2012-08-26T00:00:16Z

r2.7.1) (Robot: Adding de:Z-Faktor

New page

The writer is known as Irwin Wunder but it's not the most masucline title out there. Hiring is her day job now but she's always wanted her personal company. My family members life in Minnesota and my family members enjoys it. Body building is 1 of the issues I adore most.<br><br>My web page at home std testing ([http://www.zs-imports.com/blogs/post/70017 best site])