WERC's historic PIR measurements - Revision history

imported>Ekyoucha at 00:37, 7 June 2019

2019-06-07T00:37:41Z

imported>Ekyoucha at 23:10, 2 May 2019

2019-05-02T23:10:35Z

imported>Ekyoucha at 22:53, 2 May 2019

2019-05-02T22:53:07Z

imported>Ekyoucha at 22:52, 2 May 2019

2019-05-02T22:52:33Z

imported>Ekyoucha at 22:52, 2 May 2019

2019-05-02T22:52:18Z

imported>Ekyoucha at 22:50, 2 May 2019

2019-05-02T22:50:39Z

imported>Ekyoucha at 22:48, 2 May 2019

2019-05-02T22:48:51Z

imported>Ekyoucha at 22:41, 2 May 2019

2019-05-02T22:41:06Z

imported>Ekyoucha at 22:40, 2 May 2019

2019-05-02T22:40:51Z

imported>Ekyoucha at 22:40, 2 May 2019

2019-05-02T22:40:42Z

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    Potential PIR CR1000 Programming Mistakes (Ken) regarding dome temperature and the use of panel temperature in a thermocouple measurement
-Upon reviewing an old program for FBmet I noticed the PIRs program was using "dome temperature" (ex: "TLW_dome" and "ALW_dome") and using the "panel Temperature" ?  as the thermocouple reference.  Case temperature should have been used, which would have been a thermistor in the PIR.
+Upon reviewing an old program for FBmet I noticed the PIRs program was using "dome temperature" (ex: "TLW_dome" and "ALW_dome") and using the "panel Temperature" ?  as the thermocouple reference. I Rob started using temperature adjustments but at a minimum  Case temperature should have been used, which would have been a thermistor in the PIR, not a thermocouple (?where would the thermocouple be?).
 **public rad_mV(MUX1_QTY)

← Older revision		Revision as of 23:10, 2 May 2019
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	In July 2017 We reinstalled the radiometers at UKmet and Imn Met. I had them sent back to Eppley for recalibration/repair. I had Rob make up some new cables for the radiometers in 2016. They were wired incorrectly, and nothing seemed to be working right. He had them wired to correct for "Dome Temperature" (optional) instead of "Case Temperature" (required). He originally made them for case temperature, but had Allen rewire them for the dome temperature adjustment. Nothing was working properly. Allen and I made new cables in 2017 and wired them properly, things worked.		In July 2017 We reinstalled the radiometers at UKmet and Imn Met. I had them sent back to Eppley for recalibration/repair. I had Rob make up some new cables for the radiometers in 2016. They were wired incorrectly, and nothing seemed to be working right. He had them wired to correct for "Dome Temperature" (optional) instead of "Case Temperature" (required). He originally made them for case temperature, but had Allen rewire them for the dome temperature adjustment. Nothing was working properly. Allen and I made new cables in 2017 and wired them properly, things worked.
		+
		+	Anyway, it might just be some confusion between the terminology of Dome and Case temperature. Old PIRs didn't even have dome temperature, including some of our older models.

	Recent Email Correspondence about dome vs case temperature		Recent Email Correspondence about dome vs case temperature

@@ Line 61: / Line 61: @@
 Rob
-   Potential PIR CR1000 Programming Mistakes (Ken)
+   Potential PIR CR1000 Programming Mistakes (Ken) regarding dome temperature and the use of panel temperature in a thermocouple measurement
 Upon reviewing an old program for FBmet I noticed the PIRs program was using "dome temperature" (ex: "TLW_dome" and "ALW_dome") and using the "panel Temperature" ?  as the thermocouple reference.  Case temperature should have been used, which would have been a thermistor in the PIR.

@@ Line 3: / Line 3: @@
 In July 2017 We reinstalled the radiometers at UKmet and Imn Met.  I had them sent back to Eppley for recalibration/repair.  I had Rob make up some new cables for the radiometers in 2016.  They were wired incorrectly, and nothing seemed to be working right.  He had them wired to correct for "Dome Temperature" (optional) instead of "Case Temperature" (required).  He originally made them for case temperature, but had Allen rewire them for the dome temperature adjustment.  Nothing was working properly.  Allen and I made new cables in 2017 and wired them properly, things worked.
-   Recent Email Correspondence about this
+   Recent Email Correspondence about dome vs case temperature
 The cables that we took up were correct and I had Allen change them. My fault.

@@ Line 36: / Line 36: @@
 We have to remake the radiation cables, the case thermistor wasn't wired up (Pin D and E) for the PIRs.  Needs case temperature (required) and dome temp (F and G) is optional, but we might as well include dome temp.  I am going to order some more connectors and then make up a bunch and one of us will drive up for a 1 day trip sometime in early June I guess.
-   Older Email Correspondence
+   Older Email Correspondence where he mentions dome temperature
 > On Aug 6, 2015, at 6:50 AM, Robert Gieck <regieck@alaska.edu> wrote:

← Older revision		Revision as of 22:50, 2 May 2019
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	> On Aug 6, 2015, at 6:50 AM, Robert Gieck <regieck@alaska.edu> wrote:		> On Aug 6, 2015, at 6:50 AM, Robert Gieck <regieck@alaska.edu> wrote:
−	>	+
−	> The shortwave PSP should read between 800 W/m2 and close to 0.	+	The shortwave PSP should read between 800 W/m2 and close to 0.
−	>	+
−	> The longwave PIR won't read out in W/m2 until we process the data for dome temperature. There are thermisters in the domes that we need to get the temperature from and then calculate the output. I will have to look at some old data and see. If we were already temperature compensated, the range would be high end 500 and low end 250 (lowest is clear cold sky and highest is warm ground heated int he sunlight. The raw data is going to show a difference between the dome and what it's facing. The biggest difference would be the upward facing dome I think. Since these are differential readings they could be negative and still be correct. If the dome were around 35 F and the sky -40 (clear cold night) It would read work out like this (the values are approximate from memory). To get the emitted radiation, you need to use degrees Kelvin and the Stephan Boltzman constant.	+	The longwave PIR won't read out in W/m2 until we process the data for dome temperature. There are thermisters in the domes that we need to get the temperature from and then calculate the output. I will have to look at some old data and see. If we were already temperature compensated, the range would be high end 500 and low end 250 (lowest is clear cold sky and highest is warm ground heated int he sunlight. The raw data is going to show a difference between the dome and what it's facing. The biggest difference would be the upward facing dome I think. Since these are differential readings they could be negative and still be correct. If the dome were around 35 F and the sky -40 (clear cold night) It would read work out like this (the values are approximate from memory). To get the emitted radiation, you need to use degrees Kelvin and the Stephan Boltzman constant.
−	>	+
−	> Upward facing (amosphereric radiation)	+	Upward facing (amosphereric radiation)
−	>	+
−	> -325 (dome emmitted W/m2 calculated from temp)	+	*-325 (dome emmitted W/m2 calculated from temp)
−	> 375 W/m2 what it might read raw	+	* 375 W/m2 what it might read raw
−	> +150 (received from the sky) so this is what we are after, the radiation incoming from the sky.	+	* +150 (received from the sky) so this is what we are after, the radiation incoming from the sky.
−	>	+
−	> Downward facing (terrestrial radiation)	+	Downward facing (terrestrial radiation)
−	> A hot surface like dry-dark soil on a sunny dat might read like this.	+	A hot surface like dry-dark soil on a sunny dat might read like this.
−	>	+
−	> +800 measured raw	+	* +800 measured raw
−	> -325 dome	+	* -325 dome
−	> 475 W/m2 emmitted to space	+	* 475 W/m2 emmitted to space
−	>	+
−	> I can give you one of my old spreadsheets to use so you don't have to set up all the correction stuff.	+	I can give you one of my old spreadsheets to use so you don't have to set up all the correction stuff.
−	>	+
−	> Rob	+	Rob

	Potential PIR CR1000 Programming Mistakes (Ken)		Potential PIR CR1000 Programming Mistakes (Ken)

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    EKY Notes:
-*In July 2017 We reinstalled the radiometers at UKmet and Imn Met.  I had them sent back to Eppley for recalibration/repair.  I had Rob make up some new cables for the radiometers in 2016.  They were wired incorrectly, and nothing seemed to be working right.  He had them wired to correct for "Dome Temperature" (optional) instead of "Case Temperature" (required).  He originally made them for case temperature, but had Allen rewire them for the dome temperature adjustment.  Nothing was working properly.  Allen and I made new cables in 2017 and wired them properly, things worked.
+In July 2017 We reinstalled the radiometers at UKmet and Imn Met.  I had them sent back to Eppley for recalibration/repair.  I had Rob make up some new cables for the radiometers in 2016.  They were wired incorrectly, and nothing seemed to be working right.  He had them wired to correct for "Dome Temperature" (optional) instead of "Case Temperature" (required).  He originally made them for case temperature, but had Allen rewire them for the dome temperature adjustment.  Nothing was working properly.  Allen and I made new cables in 2017 and wired them properly, things worked.
    Email Correspondence about this

← Older revision		Revision as of 22:40, 2 May 2019
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	We have to remake the radiation cables, the case thermistor wasn't wired up (Pin D and E) for the PIRs. Needs case temperature (required) and dome temp (F and G) is optional, but we might as well include dome temp. I am going to order some more connectors and then make up a bunch and one of us will drive up for a 1 day trip sometime in early June I guess.		We have to remake the radiation cables, the case thermistor wasn't wired up (Pin D and E) for the PIRs. Needs case temperature (required) and dome temp (F and G) is optional, but we might as well include dome temp. I am going to order some more connectors and then make up a bunch and one of us will drive up for a 1 day trip sometime in early June I guess.
		+
		+	Potential PIR CR1000 Programming Mistakes (Ken)

	*Upon reviewing an old program for FBmet I noticed the PIRs program was using "dome temperature" (ex: "TLW_dome" and "ALW_dome") and using the "panel Temperature" ? as the thermocouple reference. Case temperature should have been used, which would have been a thermistor in the PIR.		*Upon reviewing an old program for FBmet I noticed the PIRs program was using "dome temperature" (ex: "TLW_dome" and "ALW_dome") and using the "panel Temperature" ? as the thermocouple reference. Case temperature should have been used, which would have been a thermistor in the PIR.