MIDC/Data Quality Statements
Total Records: 16, displaying 1-16

R#SiteSerial NumberMeasurementStart DateStart TimeEnd DateEnd TimeData Quality Statement
1BMSDirect CH112/28/201311:55:0012/28/201315:59:00Due 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)
2BMSDirect CH112/21/201310:30:0012/21/201316:22:00Due 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 CH1 was replaced with data from the SRRL Irradiance Inc RSR Direct Normal on 5/14/2014.
3BMS010256Direct CH105/23/201308:21:0007/29/201310:00:00During this time the CH1 data was substituted with the BMS NIP S/N 31137E6 (by patching the signal cable to the logger), because the CH1 was removed from service so that it could be sent to Kipp & Zonen Delft for repair. Factory repair included repainting the black surface of the element, installing a body connector, sealing, and calibration. The instrument was then calibrated in NREL/BORCAL 2013-03. Note: From the period of 9-10 MST (completely overcast) on 7/29/2013, no data is present due to phantom troubleshooting.
4BMSDirect CH103/02/201313:06:0003/02/201318:24:00Due 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 direct measurement from the SRRL RSR2, which uses a LICOR LI-200 s/n PY69225.
5BMS010256Direct CH111/07/201111:30:0011/07/201115:39:00The CH1 signal became a tad noisy around 8:00 am, then got worse around 11:30 am and was causing a large positive bias. The noise was again due to the signal cable where it enters the body of the instrument. The strain relief was loosened and the cable was allowed to slide out a tad and then the strain relief was tightened which seemed to fix the noise and bias problem.
6BMSDirect CH105/07/201105:55:0005/09/201107:58:00There 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 Direct CH1 was not pointing at the sun during this time, however data for the CH1 was reconstructed on May 16, using the CH1 instrument (s/n 060461; calibrated on 2010-05-23) installed at the NREL Outdoor Test Facility (OTF/RMIS).
7BMSDirect CH104/15/201106:43:0004/15/201106:50:00There was a planned power outage for SRRL construction activities that started at 6:11 MST. Unfortunately, the UPS powering the Sci-Tec trackers failed due to bad/old batteries at 6:43 MST. The following BMS instruments were not point at the sun for this brief period of time: CH1, NIP #2, NIP #1, LI-201, NIP RG780.
8BMS010256Direct CH109/20/201017:00:0003/31/201112:46:00The original SRRL BMS CH1 S/N 010256 was returned to service on 8/2/2010. Instrument was resealed and calibrated in BORCAL 2010-02. However the instrument now exhibits a very occasional spiking problem. It only happens at night (or when there is zero irradiance). The source of the noise was later found to be at the base of the instrument where the cables enters the body. The strain relief was tightened which seemed to fix the noise problem.
9BMS080033Direct CH105/27/201018:00:0005/28/201012:15:00Due 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. Therefore the CH1 was not pointing at the sun during this time. The data was later corrected on June 30, 2011, by replacing the CH1 data with the BMS NIP#1 during this time.
10BMS010256Direct CH105/24/201011:00:0005/27/201010:33:00There is some moisture inside the CH1. If there is sudden environmental change, such as a temperature drop, condensation may form inside the dome (and then dissipate after a short time). This causes reduced irradiance readings, as observed on May 24 from 11:15 to 12:45 MST. After opening the desciant chamber a large amount of water flowed out. The unit was removed from service and replaced with a spare (s/n 080033) on May 27 @ 10:08 MST. Calibration factor was updated in logger program at 10:32 MST on May 27.
11BMS010256Direct CH112/09/200912:11:0012/09/200914:22:00Due 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.
12BMS010256Direct CH111/15/200814:02:0011/15/200814:32:00Due to a planned power outage at SRRL, the following BMS instruments were not pointing at the sun: Direct CH1, NIP1, NIP2, LI201, TWC500, CUV4.
13BMS010256Direct CH107/07/200700:00:0007/09/200707:00:00The SRRL BMS Sci-Tec Tracker #1 shading arm was bent out of position. The CH1 was not pointing at the sun properly during this time.
14BMS010256Direct CH105/25/200610:50:0005/25/200611:10:00Sci-Tec tracker #1 tracker was down due to power shutdown for installation of new SRRL equipment lift. The following instruments were NOT pointing at the SUN: NIP #2, CH1, TUVR.
15BMS010256Direct CH107/23/200510:16:0007/23/200517:22:00Sci-Tec tracker #1 was down due to a scheduled NREL power outage on 7/23/2005 at 5:33 MST. The following instruments were NOT pointing at the SUN: NIP #2 and CH1.
16BMS010256Direct CH107/10/200509:30:0007/11/200507:19:00The SRRL BMS Sci-Tec Tracker #1 was hung up on cables and the tracker arm was bent out of position. The CH1 was not pointing at the SUN during this time.