3175 User Guide - Revision history

Mparadis at 14:36, 9 May 2018

2018-05-09T14:36:25Z

← Older revision		Revision as of 14:36, 9 May 2018
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			__NOINDEX__
	[[Category:UserGuide]]		[[Category:UserGuide]]
	{{UserguideTOC\|3175.jpg\|3175}}		{{UserguideTOC\|3175.jpg\|3175}}

Mparadis: /* Wiring up your RTD and Precision Resistors */

2013-08-08T21:06:16Z

Wiring up your RTD and Precision Resistors

← Older revision		Revision as of 21:06, 8 August 2013
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	\|}		\|}

	~~===Wiring up your RTD and Precision Resistors===~~		{{RTDinfo}}
	{\|
	~~\|[[File:1046_0_RTD_4W.jpg\|400px\|link=]]\|\|[[File:3175_0_Connection.jpg\|400px\|link=]]\|\|[[File:3175_0_Connection_Closeup.jpg\|250px\|link=]]~~
	\|}

	~~Shown above is how to connect the RTD to the precision resistors and the 1046 PhidgetBridge.~~

	===Using the PhidgetBridge Code Sample on Windows===		===Using the PhidgetBridge Code Sample on Windows===

Burley at 15:39, 10 August 2012

2012-08-10T15:39:27Z

← Older revision		Revision as of 15:39, 10 August 2012
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	[[Category:UserGuide]]		[[Category:UserGuide]]
			{{UserguideTOC\|3175.jpg\|3175}}
	==Getting Started==		==Getting Started==
	{\|		{\|

Mparadis: /* Self heating of RTDs */

2012-08-09T16:38:12Z

Self heating of RTDs

← Older revision		Revision as of 16:38, 9 August 2012
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	::<math>Power_{RTD}=(\frac{5}{2000+R_{RTD}})^{2}*R_{RTD}</math>		::<math>Power_{RTD}=(\frac{5}{2000+R_{RTD}})^{2} \times R_{RTD}</math>

Mparadis: /* Applying the Formula */

2012-08-09T16:38:03Z

Applying the Formula

← Older revision		Revision as of 16:38, 9 August 2012
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	::<math>T_{Pt} = \frac{4.750310^{7}}{R_0^{2}}(\frac{V_B}{1000-V_B})^{2}+\frac{4.615610^{5}}{R_0}(\frac{V_B}{1000-V_B})-242.615</math>		::<math>T_{Pt} = \frac{4.7503 \times 10^{7}}{R_0^{2}} \times (\frac{V_B}{1000-V_B})^{2}+\frac{4.6156*10^{5}}{R_0} \times (\frac{V_B}{1000-V_B})-242.615</math>


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	::<math>R_{RTD}=2000*\frac{V_B}{1-V_B}</math>		::<math>R_{RTD}=2000 \times \frac{V_B}{1-V_B}</math>

	===Self heating of RTDs===		===Self heating of RTDs===

Burley: /* Self heating of RTDs */

2012-08-09T15:45:04Z

Self heating of RTDs

← Older revision		Revision as of 15:45, 9 August 2012
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	The RTD manufacturer will often specify the temperature increase of the RTD as a function of power (watts). This		The RTD manufacturer will often specify the temperature increase of the RTD as a function of power (watts). This

	<math>Power_{RTD}=(\frac{5}{2000+R_{RTD}})^{2}*R_{RTD}</math>
			::<math>Power_{RTD}=(\frac{5}{2000+R_{RTD}})^{2}*R_{RTD}</math>


	power was calculated in the previous equation. This temperature increase will depend on if it is attached to a larger object that will sink the heat away, or if there is air movement over the RTD. A simple way to reduce the effects of self-heating is to enable the bridge in software during the measurement period, and disable the bridge until the next measurement.		power was calculated in the previous equation. This temperature increase will depend on if it is attached to a larger object that will sink the heat away, or if there is air movement over the RTD. A simple way to reduce the effects of self-heating is to enable the bridge in software during the measurement period, and disable the bridge until the next measurement.

Burley: /* Applying the Formula */

2012-08-09T15:44:53Z

Applying the Formula

← Older revision		Revision as of 15:44, 9 August 2012
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	There are several standards for RTDs. Common RTDs are built from platinum, the most common models being Pt100 and Pt1000. The 100 or 1000 refers to the resistance of the RTD and 0 Celsius. We have calculated formulas for the PT100 and PT1000 standards to convert the Bridge Value in (mv/V) directly into a temperature.		There are several standards for RTDs. Common RTDs are built from platinum, the most common models being Pt100 and Pt1000. The 100 or 1000 refers to the resistance of the RTD and 0 Celsius. We have calculated formulas for the PT100 and PT1000 standards to convert the Bridge Value in (mv/V) directly into a temperature.
	:where V<sub>B</sub> is the BridgeValue given by the PhidgetBridge (in mV/V), and		:where V<sub>B</sub> is the BridgeValue given by the PhidgetBridge (in mV/V), and


	::<math>T_{Pt} = \frac{4.750310^{7}}{R_0^{2}}(\frac{V_B}{1000-V_B})^{2}+\frac{4.615610^{5}}{R_0}(\frac{V_B}{1000-V_B})-242.615</math>		::<math>T_{Pt} = \frac{4.750310^{7}}{R_0^{2}}(\frac{V_B}{1000-V_B})^{2}+\frac{4.615610^{5}}{R_0}(\frac{V_B}{1000-V_B})-242.615</math>


	:R<sub>0</sub> is the resisitance of the RTD at 0°C (100 for Pt100 and 1000 for Pt1000)		:R<sub>0</sub> is the resisitance of the RTD at 0°C (100 for Pt100 and 1000 for Pt1000)
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	Some RTDs are not standardized, so we cannot provide a formula to convert the Bridge Value to temperature. The following formula will calculate the resistance of the RTD or thermistor from the bridge voltage - a good start for computing the temperature. To calculate temperature, check the manufacturer’s data sheet for formulas or tables for converting resistance to temperature.		Some RTDs are not standardized, so we cannot provide a formula to convert the Bridge Value to temperature. The following formula will calculate the resistance of the RTD or thermistor from the bridge voltage - a good start for computing the temperature. To calculate temperature, check the manufacturer’s data sheet for formulas or tables for converting resistance to temperature.

	<math>R_{RTD}=2000*\frac{V_B}{1-V_B}</math>
			::<math>R_{RTD}=2000*\frac{V_B}{1-V_B}</math>

	===Self heating of RTDs===		===Self heating of RTDs===

Burley: /* Applying the Formula */

2012-08-09T15:44:35Z

Applying the Formula

← Older revision		Revision as of 15:44, 9 August 2012
Line 21:		Line 21:
	There are several standards for RTDs. Common RTDs are built from platinum, the most common models being Pt100 and Pt1000. The 100 or 1000 refers to the resistance of the RTD and 0 Celsius. We have calculated formulas for the PT100 and PT1000 standards to convert the Bridge Value in (mv/V) directly into a temperature.		There are several standards for RTDs. Common RTDs are built from platinum, the most common models being Pt100 and Pt1000. The 100 or 1000 refers to the resistance of the RTD and 0 Celsius. We have calculated formulas for the PT100 and PT1000 standards to convert the Bridge Value in (mv/V) directly into a temperature.
	:where V<sub>B</sub> is the BridgeValue given by the PhidgetBridge (in mV/V), and		:where V<sub>B</sub> is the BridgeValue given by the PhidgetBridge (in mV/V), and

	::<math>T_{Pt} = \frac{4.750310^{7}}{R_0^{2}}(\frac{V_B}{1000-V_B})^{2}+\frac{4.615610^{5}}{R_0}(\frac{V_B}{1000-V_B})-242.615</math>		::<math>T_{Pt} = \frac{4.750310^{7}}{R_0^{2}}(\frac{V_B}{1000-V_B})^{2}+\frac{4.615610^{5}}{R_0}(\frac{V_B}{1000-V_B})-242.615</math>

	:R<sub>0</sub> is the resisitance of the RTD at 0°C (100 for Pt100 and 1000 for Pt1000)		:R<sub>0</sub> is the resisitance of the RTD at 0°C (100 for Pt100 and 1000 for Pt1000)

Burley: /* Self heating of RTDs */

2012-08-09T15:44:23Z

Self heating of RTDs

← Older revision		Revision as of 15:44, 9 August 2012
Line 34:		Line 34:
	The RTD manufacturer will often specify the temperature increase of the RTD as a function of power (watts). This		The RTD manufacturer will often specify the temperature increase of the RTD as a function of power (watts). This

	<math>~~Power<sub>~~RTD~~</sub>~~=(frac{5}{2000+~~R<sub>~~RTD~~</sub>~~})^{2}*~~R<sub>~~RTD~~</sub>~~</math>		<math>Power_{RTD}=(\frac{5}{2000+R_{RTD}})^{2}*R_{RTD}</math>

	power was calculated in the previous equation. This temperature increase will depend on if it is attached to a larger object that will sink the heat away, or if there is air movement over the RTD. A simple way to reduce the effects of self-heating is to enable the bridge in software during the measurement period, and disable the bridge until the next measurement.		power was calculated in the previous equation. This temperature increase will depend on if it is attached to a larger object that will sink the heat away, or if there is air movement over the RTD. A simple way to reduce the effects of self-heating is to enable the bridge in software during the measurement period, and disable the bridge until the next measurement.

Burley: /* Using the Resistor Kit with non-standard RTDs and thermistors */

2012-08-09T15:43:49Z

Using the Resistor Kit with non-standard RTDs and thermistors

← Older revision		Revision as of 15:43, 9 August 2012
Line 27:		Line 27:
	Some RTDs are not standardized, so we cannot provide a formula to convert the Bridge Value to temperature. The following formula will calculate the resistance of the RTD or thermistor from the bridge voltage - a good start for computing the temperature. To calculate temperature, check the manufacturer’s data sheet for formulas or tables for converting resistance to temperature.		Some RTDs are not standardized, so we cannot provide a formula to convert the Bridge Value to temperature. The following formula will calculate the resistance of the RTD or thermistor from the bridge voltage - a good start for computing the temperature. To calculate temperature, check the manufacturer’s data sheet for formulas or tables for converting resistance to temperature.

	<math>~~R<sub>~~RTD~~</sub>~~=2000*frac{~~V<sub>B</sub>~~}{1-~~V<sub>B</sub>~~}</math>		<math>R_{RTD}=2000*\frac{V_B}{1-V_B}</math>

	===Self heating of RTDs===		===Self heating of RTDs===