MIDC/Data Quality Statements
Total Records: 21, displaying 1-21

R#SiteSerial NumberMeasurementStart DateStart TimeEnd DateEnd TimeData Quality Statement
1BMSDiffuse 8-4812/28/201311:55:0012/28/201315:59:00Due to a scheduled NREL power outage, to upgrade campus electrical infrastructure, The following BMS instruments were not pointing at the sun during this time: Direct CH1, NIP #2, CUVA2, CUVB2, TUVR; and the following instruments were un-shaded: Diffuse 8-48, PSP, PIR. The South Sci-Tec tracker for these instruments are protected by UPS, however the battery depleted at 11:55 MST (the power outage started at 6:46 MST)
2BMSDiffuse 8-4812/21/201310:30:0012/21/201316:22:00Due to a scheduled NREL power outage, to upgrade campus electrical infrastructure, The following BMS instruments were not pointing at the sun during this time: Direct CH1, NIP #2, CUVA2, CUVB2, TUVR; and the following instruments were un-shaded: Diffuse 8-48, PSP, PIR. The South Sci-Tec tracker for these instruments are protected by UPS, however the battery depleted at 10:30 MST (the power outage started at 7:00 MST). Data for the Direct 8-48 was replaced with data calculated from the SRRL BMS Global CM22 and the SRRL Irradiance Inc RSR Direct Normal on 5/14/2014.
3BMSDiffuse 8-4809/06/201314:13:0009/06/201315:00:00SRRL BMS ventilators were cleaned on Sept 6, 2013. Due to prolonged un-shading of the Diffuse 8-48 and PSP, the data from 14:13 through 15:00 MST was corrected using data from the Diffuse CM22.
4BMSDiffuse 8-4803/02/201313:06:0003/02/201318:24:00Due to a scheduled NREL power outage, to upgrade campus power capacity, The following BMS instruments were not pointing at the sun during this time: Direct CH1, NIP #2, NIP #1, LI-201, NIP RG780, CUVA2, CUVB2, TWC; and the following instruments were un-shaded: Diffuse 8-48, PSP, CM22, CUV4, PIR, CG4. The Sci-Tec tracker for these instruments are protected by UPS, however the battery depleted at 13:06 MST (the power outage started at 8:06 MST). Data for the 8-48 was reconstructed on March 5, using the diffuse measurement from the SRRL RSR2, which uses a LICOR LI-200 s/n PY69225.
5BMSDiffuse 8-4805/07/201105:55:0005/09/201107:58:00There was a planned power outage for SRRL construction activities that started at 5:18 MST. Unfortunately, the backup generator provided to SRRL was providing bad power to the UPS powering the Sci-Tec trackers, therefore the UPS failed at 5:55 MST. Unfortunately, when normal AC power was restored at 11:45 MST, the Sci-Tec trackers had lost all their configuration due to UPS cycling on and off during the outage, therefore were not tracking. The tracker settings were restored on May 9 at 7:58 MST. The SRRL BMS Diffuse was not shaded during this time, however data for the 8-48 was reconstructed on May 16, using the diffuse measurement from the SRRL RSR2, which uses a LICOR LI-200 s/n PY69225.
6BMSDiffuse 8-4805/27/201018:00:0005/28/201012:15:00Due to improper mounting of the replacement CH1 s/n 080033 the Sci-tec tracker was not tracking properly due to collision with the CH1 against tracker. The following BMS instruments were not pointing at the sun: Direct CH1, NIP2, CUVA2, & CUVB2 and the following instruments were unshaded: 8-48, PSP, PIR. The data was later corrected on June 30, 2011, by replacing the 8-48 data with the BMS Diffuse CM22 during this time.
7BMS32331Diffuse 8-4802/25/201010:50:0002/25/201011:04:00The 8-48 signal was reading low due to intermittent signal cable problem between patch panel and multiplexer. The 8-48 channel was relocated from J-Box Ch. 3-0 (Mux Ch. 18) to J-Box Ch. 3-3 (Mux Ch. 21). This should solve the problem permanently.
8BMS32331Diffuse 8-4802/20/201008:48:0002/22/201008:49:00The 8-48 signal is reading very low or negative due to unknown signal cable problem between patch panel and multiplexer. The data was later corrected on June 30, 2011, by replacing the 8-48 data with the BMS Diffuse CM22 during this time.
9BMS32331Diffuse 8-4802/14/201000:00:0002/16/201008:10:00The 8-48 signal is reading very low on Feb. 14 and negative on the days that follow. A screw was tightened on the multiplexer. The data was later corrected on June 30, 2011, by replacing the 8-48 data with the BMS Diffuse CM22 during this time.
10BMS32331Diffuse 8-4812/15/200909:10:0012/15/200910:20:00The 8-48 signal has a -30 W/m^2 bias. A screw in patch panel was tightened.
11BMS32331Diffuse 8-4812/10/200908:30:0012/10/200916:30:00The 8-48 signal has a -20 W/m^2 bias. A screw was tightened.
12BMSDiffuse 8-4812/09/200912:11:0012/09/200914:22:00Due to a power outage at NREL, followed by bad power, the SRRL tracker UPS shutdown. The following BMS instruments were not pointing at the sun: Direct CH1, NIP1, NIP2, NIP-RG780, LI201, TWC500, CUV4; and the following instruments were unshaded: 8-48, CM22, PSP, CUV4, PIR, CG4.
13BMS32331Diffuse 8-4810/21/200908:48:0010/22/200909:30:00The 8-48 signal has a -38 W/m^2 bias. A screw was tightened.
14BMSDiffuse 8-4811/15/200814:02:0011/15/200814:32:00Due to a planned power outage at SRRL, the following BMS instruments were unshaded: Diffuse 8-48, CM22, PSP, CUV4, DW-PIR, DW-CG4.
15BMS32331Diffuse 8-4807/07/200700:00:0007/09/200707:00:00The SRRL BMS Sci-Tec Tracker #1 shading arm was bent out of position. The 8-48 was partially unshaded during this time.
16BMS32331Diffuse 8-4805/25/200610:50:0005/25/200611:10:00Sci-Tec tracker #1 tracker was down due to power shutdown for installation of new SRRL equipment lift. The following instruments were UNSHADED: Diffuse 8-48, Diffuse PSP, and the Downwelling PIR.
17BMS32331Diffuse 8-4807/23/200510:16:0007/23/200517:22:00Sci-Tec tracker #1 was down due to a scheduled NREL power outage on 7/23/2005 at 5:33 MST. The following instruments were UNSHADED: Diffuse 8-48, Diffuse PSP, and the Downwelling PIR.
18BMS32331Diffuse 8-4807/10/200509:30:0007/10/200523:59:00The SRRL BMS Sci-Tec Tracker #1 was hung up on cables during this time. The following instruments were UNSHADED: Diffuse 8-48, Diffuse PSP and the PIR.
19BMSDiffuse 8-4801/05/200112:00:0001/09/200108:20:00The 8-48 signal was noisy during this time period, due to a loose screw on the patch panel.
20BMSDiffuse 8-4812/26/200005:00:0001/03/200113:05:00The 8-48 signal cable (from J-box to instrument) was going bad during this time period. The night time signal was very noisy and as the cable got worse the noise appeared in the day time data on 01-03-2001. The cable was replaced.
21BMSDiffuse 8-4801/13/199902/08/200009:18:00Data during this time period from this instrument (s/n 32331) were converted from millivolt signals to irradiance units (Watt/m2) using a calibration factor determined by NREL prior to installation. The original factory calibration factor (109.41 W/mē/mV) is 4.9% lower than the NREL value (113.89 W/mē/mV). Given the uncertainties associated with the NREL calibration performed on a tilt, we suggest the user of these data adjust all diffuse data from this instrument: Corrected Diffuse = Diffuse x 0.9607