Equipment and Calibration

Equipment history at East End

| ALL | | Anemometer || Barometer || Battery Bank || Camera || CO2 Probe || Conductivity Sensor || Data Logger || DO Sensor || Gas Analyzer || Heat Flux Plate || Interface || Multiplexer || Narrow Band || Net Radiometer || PAR Sensor || Precipitation || RH & Temp || Solar Controller || Solar Panel || Spectrometer || Water Level |

SELECT a.recno, a.eh_date, a.eh_loc1, a.eh_loc2, IF(a.eh_loc2=:loc, a.eh_locref2, a.eh_locref1) AS ref, a.eh_locref2, a.eh_title, a.eh_notes, a.eh_id, b.serialno, b.equip, b.modelno FROM equiphist a INNER JOIN equiplist b ON a.eh_id=b.recno WHERE (a.eh_loc1=:loc1 OR a.eh_loc2=:loc2) ORDER BY b.equip, a.eh_date, field(a.eh_title,'Calibration', 'Removed', 'Installed')

Date	Serial No.	Model	Action	Ref	Notes
Anemometer
2013-11-25	000024	WMP 1352	Moved	Anemometer	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	000024	WMP 1352	Removed	Anemometer	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	000024	WMP 1352	Installed	Anemometer	Reinstalled after being removed when the scaffolding fell over.
2015-07-20	000024	WMP 1352	Removed	Anemometer	Removed from East End to be replaced by a 1590 model sonic with analog outs
2015-07-20	124215	WM 1590	Installed	Anemometer	Installed on the East End Tower to upgrade the eddy system - replacing older equipment
2016-01-12	124215	WM 1590	Removed	Anemometer	Removed from tower for calibration. The SOS was reading unexpectedly low.
2016-01-12	153804	WM 1590	Installed	Anemometer	Installed at East End, brand new
2017-01-17	153804	WM 1590	Removed	Anemometer	Returned to lab for firmware upgrade. It was replaced by sn 124215.
2017-01-17	124215	WM 1590	Installed	Anemometer	Installed on East End tower to replace sn 153804.
Barometer
2013-11-25	H0160069	PTB110	Moved	Barometer	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	H0160069	PTB110	Removed	Barometer	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	H0160069	PTB110	Installed	Barometer	Reinstalled after being removed when the scaffolding fell over.
2016-06-24	H0160069	PTB110	Removed	Barometer	Removed from East End because it was reading low and erratically.
2016-08-31	H0160069	PTB110	Installed	Barometer	Reinstalled on the East End tower after calibration at Vaisala.
2016-09-13	H0160069	PTB110	Removed	Barometer	Was reading low in the field again (around 98kPa) even though it was just returned from Campbell. Removed from EE tower for testing in the lab.
2016-09-29	H0160069	PTB110	Installed	Barometer	Tested okay in the lab. Reinstalled to try again.
Battery Bank
2013-11-25	BB-EE	BB-Fab	Installed	Battery Bank	This is the initial installation of this battery bank for the East End Tower. Four batteries were brought from the DWR Corn Construction tower and installed at this tower. The batteries are on a boardwalk on the ground next to the tower and will be moved to secondary scaffolding later.
2014-03-07	BB-EE	BB-Fab	Moved	Battery Bank	The battery bank and solar panels were moved from the south side of the tower to a new scaffolding to the south of the tower.
2015-11-20	BB-EE	BB-Fab	Upgrade	Battery Bank	I added the two batteries recently removed from Alfalfa. These two batteries had Jan 2012 stickers and tested okay in the lab. I charged them up in the lab before taking them to the field. The other four batteries at East End also had Jan 2012 stickers and I think the two I added were originally at this tower or the Corn tower before.
2015-12-08	BB-EE	BB-Fab	Upgrade	Battery Bank	A third solar panel was added to this solar system.
2016-03-08	BB-EE	BB-Fab	Maintenance	Battery Bank	I disconnected all the batteries and tested them individually. One of the older ones was warm to the touch and completely failed the load test. One of the batteries I added on 2015-11-20 also failed the load test. I removed these two batteries from the bank.
2016-03-24	BB-EE	BB-Fab	Upgrade	Battery Bank	I swapped the batteries on the solar system. Four old batteries were removed and six new group 27 deep cycle flooded batteries were installed. Five of the new batteries have a date of 2/16 and one is 1/16.
2020-09-10	BB-EE	BB-Fab	Maintenance	Battery Bank	Losing power in the predawn. A lot of wet corrosion on positive leads. Removed one weak battery from the bank. Now running on five. Water levels looked okay.
2020-09-29	BB-EE	BB-Fab	Maintenance	Battery Bank	Five remaining batteries disconnected and left resting for most of the day. Water levels were okay but all tested weak to dead. The system is running on one new battery for the time being.
2020-10-05	BB-EE	BB-Fab	Replaced	Battery Bank	Replaced old battery bank with 4 brand-new sealed AGM batteries. The terminals have been sprayed with anti-corrosion grease.
Camera
2016-09-29	0030F4D214A3	SD130BN	Installed	Camera	Installed on the East End tower replacing a Canon A series camera. A compute stick was also installed to collect the images.
2018-09-05	0030F4D214A3	SD130BN	Removed	Camera	Camera and camera enclosure stolen the night of 2018-08-29
2020-07-21	RPI0W-005	RPI0W	Installed	Camera	Installed at EE to replace the Canon camera that was stolen in June.
2024-05-01	RPI0W-006	RPI0W	Moved	Camera	Move to East End to provide inter-comparison from new higher location and changed file name from "WP_picam_" to "EE_picam_"
2024-05-01	RPI0W-005	RPI0W	Notes	Camera	Changed file name from "EE_picam_" to "old_EE_picam_"
2024-08-07	RPI0W-006	RPI0W	Maintenance	Camera	Intermittent web page connection, tightening screws on the power terminals inside the box seemed to solve the problem
2024-08-29	RPI0W-005	RPI0W	Removed	Camera	Removed from EE after tower was raised and we decided to end the intercomparison with RPI0W-006
CO2 Probe
2014-06-26	GP20140011	GP-001	Installed	CO2 probe	Installed at the East End tower.
2015-06-25	GP20140011	GP-001	Removed	CO2 probe	Removed this 2% probe from East End. Replaced by 4% probe sn GP20140021.
2015-06-25	GP20140021	GP-001	Installed	CO2 probe	Installed this 4% probe at East End due to replaced 2% probe sn GP20140011.
2015-12-08	GP20140021	GP-001	Removed	CO2 probe	This 4% CO2 probe was removed from East End. It was replaced by an 8% probe sn GP20150109
2015-12-08	GP20150109	GP-001	Installed	CO2 probe	This 8% probe was installed at East End to replace a 4% probe sn GP20140021
2016-11-21	GP20150109	GP-001	Removed	CO2 probe	Removed from East End where it was pulling about 6A of power and browning out the entire site.
2018-04-20	GP20140019	GP-001	Installed	CO2 probe	Installed at EE. The previous probe had been brought back to the lab at the last site visit b/c it was unresponsive.
2019-01-03	GP20140019	GP-001	Removed	CO2 probe	Removed and brought back to the lab for testing.
2019-01-18	GP20150101	GP-001	Installed	CO2 probe	Installed at EE to replace sn GP20140019, which was brought back to the lab for testing.
2019-07-10	GP20150101	GP-001	Removed	CO2 probe	Removed from EE and brought back to the lab for further testing (it was maxing out, even when out of the water).
2019-09-04	GP20160096	GP-001	Installed	CO2 probe	The CO2 probe attached to the plastic chain to hang next to the miniDot.
2019-09-18	GP20160096	GP-001	Removed	CO2 probe	Removed from East Pond because it was railed high even in air.
2019-10-02	GP20160096	GP-001	Installed	CO2 probe	Installed at EE off the north side of the tower.
2020-10-05	GP20160096	GP-001	Removed	CO2 probe	Removed from EE because it still rails high in air and in water. Will send it back to the factory
Conductivity Sensor
2014-06-12	6494	CS547A	Installed	Conductivity Sensor	Installed on the East End tower with interface sn 3585.
2015-01-05	6494	CS547A	Removed	Conductivity Sensor	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	6494	CS547A	Installed	Conductivity Sensor	Reinstalled after being removed when the scaffolding fell over.
2017-08-02	11020258	U24-002-C	Moved	Conductivity Sensor	The Hobo conductivity sensor was moved with the miniDOT from the T3 Boardwalk Temporary Tower to the Permanent Tower.
2017-09-13	11020258	U24-002-C	Moved	Conductivity Sensor	Moved from the Permanent Tower to the T2 Closed Canopy Temporary Tower
2017-09-13	6494	CS547A	Removed	Conductivity Sensor	Removed from EE because the values were flat.
2017-09-26	6494	CS547A	Installed	Conductivity Sensor	Installed at EE, after I'm assuming it tested fine in the lab.
2019-12-05	6494	CS547A	Removed	Conductivity Sensor	Removed from EE and brought back to the lab for drying and testing. The datalogger door was open when we arrived and the conductivity sensor interface was wet.
2019-12-17	6494	CS547A	Installed	Conductivity Sensor	Reinstalled at East End after being removed after getting wet ans possibly causing a short circuit. Tested fine in the lab.
2020-05-29	6494	CS547A	Calibration	Conductivity Sensor	Calibration in the field with DI water (0 mS) and a YSI solution (10,000 uS). Temperature-corrected mS/cm readings from the data logger, where the temperature correction occurs in the data logger program. In DI water: 0.00mS/cm, 22.4C In 10,000 uS calibration soln: 11.3mS/cm, 23.0C Calibration: (Corrected mScm) = 0.8850 * (Sensor mScm)
Data Logger
2013-11-25	38212	CR1000	Moved	Data Logger Eddy	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2013-11-25	47110	CR1000	Moved	Data Logger Met	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2014-05-13	38212	CR1000	Upgrade	Data Logger Eddy	I updated the OS from v21 to v27. I had to reset the CR1000’s IP address (169.254.97.98) and upload the program after the OS upgrade, but all went well. The new OS lets us use CFM cards up to 16GB.
2015-01-05	38212	CR1000	Removed	Data Logger Eddy	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-05	47110	CR1000	Removed	Data Logger Met	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	38212	CR1000	Installed	Data Logger Eddy	Reinstalled after being removed when the scaffolding fell over.
2015-01-20	47110	CR1000	Installed	Data Logger Met	Reinstalled after being removed when the scaffolding fell over.
2015-08-19	38212	CR1000	Removed	Data Logger Eddy	Removed from the East End tower after becoming obsolete when the Licor flux system was installed.
2017-07-19	47110	CR1000	Upgrade	Data Logger Met	Upgraded operating system to 31.08.
2018-07-05	48042	CR10X	Installed	Data Logger Diffuse PAR	Installed in a separate box to run the rotating shadow band diffuse PAR.
2019-01-24	47110	CR1000	Serviced	Data Logger Met	Changed Pakbus address from 1 to 12.
2021-07-21	23865	CR1000	Moved	none	Moved from West Pond to East End at the conclusion of the radiometer intercomparison at WP
2021-08-17	23865	CR1000	Moved		Moved from EE to MB after completion of radiometer intercomparison at EE
DO Sensor
2014-04-10	DO-06	DO6400/T	Installed	DO Sensor	Installed DO probe at East End
2016-10-11	DO-06	DO6400/T	Removed	DO Sensor	Removed from East End for service. It was out od the water, reading high and had bite marks on the cable.
2016-10-26	DO-06	DO6400/T	Installed	DO Sensor	Re-installed at East End tower after testing in the lab.
2017-08-02	1219	miniDOT	Moved	DO Sensor	The miniDOT was moved with the Hobo conductivity sensor from the T3 Boardwalk Temporary Tower to the Permanent Tower.
2017-09-13	1219	miniDOT	Moved	DO Sensor	Moved from the Permanent Tower to the T2 Closed Canopy Temporary Tower
2017-11-10	1219	miniDOT	Installed	DO Sensor	Installed at East End hanging from the north side of the scaffolding
2018-07-12	1219	miniDOT	Removed	DO Sensor	Brought back to the lab to replace batteries.
2018-07-17	1219	miniDOT	Installed	DO Sensor	Turned on and reinstalled with fresh batteries. The water level is very low so the sensor end is just sitting on the muck.
2018-12-06	DO-06	DO6400/T	Removed	DO Sensor	Removed from East End because it was not working and has been made obsolete by MiniDot sensor.
2024-10-23	1219	miniDOT	Removed	DO Sensor	Removed from EE and brought back to the lab to set its clock
2024-11-05	1219	miniDOT	Installed	DO Sensor	Reinstalled after a trip to the lab for a clock reset, fresh desiccant, and new batteries.
Gas Analyzer
2013-11-25	TG1-0203	LI-7700	Moved	Gas Analyzer CH4	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2013-11-25	0073	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End Wetland tower to replace sn 0042 for calibration.
2014-02-28	0073	LI-7500A	Calibration	Lab	Last calibration: 2013-11-20 AGC=58 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=98.44kPa, Tair=19.43C, Tdew=9.72C Zero air at 1400psi, God CO2 421.22 at 1500 Tdewspan=15.17 CO2 zero 0.9579 -> 0.9578 Offset: -0.21ppm CO2 span 1.002 -> 1.0009 Offset: 0.58ppm H2O zero 0.7328 -> 0.7355 Offset: 16.5ppm H2O span 1.0042 -> 0.9972 Offset: 0.16ppm Notes: CO2 span a little unstable +-0.5ppm (usually +-0.05ppm)
2014-02-25	TG1-0155	LI-7700	Removed	Gas Analyzer CH4	Removed from the Alfalfa tower along with its wash box to be installed on the East End Tower to replace sn TG1-0203 that was returned to Frank
2014-02-25	TG1-0203	LI-7700	Removed	Gas Analyzer CH4	Removed from the East End tower with its wash box to be returned to Frank.
2014-02-25	0073	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the East End tower for calibration. Replaced by sn 1594.
2014-02-28	0073	LI-7500A	Calibration	Lab	Last calibration: 2013-11-20 AGC=58 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=98.44kPa, Tair=19.43C, Tdew=9.72C Zero air at 1400psi, God CO2 421.22 at 1500 Tdewspan=15.17 CO2 zero 0.9579 -> 0.9578 Offset: -0.21ppm CO2 span 1.002 -> 1.0009 Offset: 0.58ppm H2O zero 0.7328 -> 0.7355 Offset: 16.5ppm H2O span 1.0042 -> 0.9972 Offset: 0.16ppm Notes: CO2 span a little unstable +-0.5ppm (usually +-0.05ppm)
2014-02-25	1594	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End tower to replace sn 0073 for calibration
2014-02-25	TG1-0155	LI-7700	Installed	Gas Analyzer CH4	Installed on the East End Tower with its wash box to replace sn TG1-0203 that was returned to Frank. This instrument came directly from Alfalfa.
2014-03-07	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2013-03-20 RSSI=85%, Optical RH=19% Ambient P=102.8kPa, Tair=16.3C Zero Air at 1600psi, 2nd CH4 4.995 at 1100 CH4 Zero Offset: 0.03ppm CH4 Span Offset: 0.015ppm Notes: Calibrated by Cove and Sara. Firmware upgraded to v1.0.21 before cal. Windy day. A little fluctuation in span 5.01-4.995
2014-06-05	1594	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 0041
2014-06-05	0041	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End tower to replace sn 1594 for calibration.
2014-12-22	0041	LI-7500A	Calibration	Lab	Last calibration: 2014-06-04 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.23kPa, Tair=22.30C, Tdew=13.20C Zero Air at 1000psi, God CO2 421.22 at 1300 Tdewspan=15.95 CO2 zero 1.0009 -> 1.0008 Offset: -0.1ppm CO2 span 1.0101 -> 1.0116 Offset: -0.82ppm H2O zero 0.8235 -> 0.8242 Offset: 4.1ppm H2O span 1.0013 -> 1.1234 Offset: -2.69ppm Notes: Dew point drifting up after calibration - might have been dew point generator.
2014-09-10	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2014-03-07 RSSI=80%, Optical RH=23% Ambient P=101.23kPa, Tair=29.9C Zero Air at 1400psi, 2nd CH4 4.995 at 700 CH4 Zero Offset: 0.085ppm CH4 Span Offset: -0.195ppm Notes: Very hot day with no wind. Offsets larger than usual.
2014-09-25	0041	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the East End tower for calibration. Replaced by sn 0073.
2014-12-22	0041	LI-7500A	Calibration	Lab	Last calibration: 2014-06-04 AGC=51 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=101.23kPa, Tair=22.30C, Tdew=13.20C Zero Air at 1000psi, God CO2 421.22 at 1300 Tdewspan=15.95 CO2 zero 1.0009 -> 1.0008 Offset: -0.1ppm CO2 span 1.0101 -> 1.0116 Offset: -0.82ppm H2O zero 0.8235 -> 0.8242 Offset: 4.1ppm H2O span 1.0013 -> 1.1234 Offset: -2.69ppm Notes: Dew point drifting up after calibration - might have been dew point generator.
2014-09-25	0073	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End tower to replace sn 0041 for calibration.
2015-04-06	0073	LI-7500A	Calibration	Lab	Last calibration: 2014-09-23 AGC=58 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.36kPa, Tair=18.6C, Tdew=4.76C Zero Air at 900psi, God CO2 421.22 at 1200 Tdewspan=15.97 CO2 zero 0.9586 -> 0.9578 Offset: -2.8ppm CO2 span 1.0023 -> 1.0031 Offset: -0.22ppm H2O zero 0.7382 -> 0.7355 Offset: -17ppm H2O span 1.0109 -> 1.0253 Offset: -0.27ppm Notes: The H2O span was unstable. Adding water to the dew point generator seemed to improve the situation but still variable.
2014-12-23	TG1-0155	LI-7700	Removed	Gas Analyzer CH4	On power up the mirror would spin at top speed and not stop. Removed for testing in the lab.
2015-01-05	0073	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the tower with the rest of the equipment after the tower fell down in the wind on 12/30
2015-04-06	0073	LI-7500A	Calibration	Lab	Last calibration: 2014-09-23 AGC=58 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.36kPa, Tair=18.6C, Tdew=4.76C Zero Air at 900psi, God CO2 421.22 at 1200 Tdewspan=15.97 CO2 zero 0.9586 -> 0.9578 Offset: -2.8ppm CO2 span 1.0023 -> 1.0031 Offset: -0.22ppm H2O zero 0.7382 -> 0.7355 Offset: -17ppm H2O span 1.0109 -> 1.0253 Offset: -0.27ppm Notes: The H2O span was unstable. Adding water to the dew point generator seemed to improve the situation but still variable.
2015-01-20	TG1-0224	LI-7700	Installed	Gas Analyzer CH4	Reinstalled after being removed when the scaffolding fell over. This 7700 still has a wash pump control problem.
2015-01-20	0418	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the repositioned scaffolding at East End with the rest of the sensors after the scaffolding fell over in the wind and was rebuilt.
2015-07-15	0418	LI-7500A	Calibration	Lab	Last calibration: 2015-01-13 AGC=49 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.4kPa, Tair=21.72C, Tdew=16.62C Zero Air at 800psi, God CO2 421.22 at 850 Tdewspan=11.08 CO2 zero 0.9011 -> 0.9016 Offset: 1.75ppm CO2 span 1.0015 -> 1.0064 Offset: -2.52ppm H2O zero 0.8534 -> 0.8550 Offset: 8.9ppm H2O span 0.9867 -> 0.9897 Offset: 0.04ppm Notes: External serial port did not work
2015-02-05	TG1-0224	LI-7700	Removed	Gas Analyzer CH4	Removed from East End for testing in the lab due to the pump control problem. Replaced by sn TG1-0155
2015-02-05	TG1-0155	LI-7700	Installed	Gas Analyzer CH4	Installed on the East End tower to replace sn TG1-0224 that has the pump control problem
2015-04-23	0418	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the East End tower for calibration. Replaced by sn 1594.
2015-07-15	0418	LI-7500A	Calibration	Lab	Last calibration: 2015-01-13 AGC=49 SDM=7 DAC1=0-1000 DAC2=10-25 Ambient P=100.4kPa, Tair=21.72C, Tdew=16.62C Zero Air at 800psi, God CO2 421.22 at 850 Tdewspan=11.08 CO2 zero 0.9011 -> 0.9016 Offset: 1.75ppm CO2 span 1.0015 -> 1.0064 Offset: -2.52ppm H2O zero 0.8534 -> 0.8550 Offset: 8.9ppm H2O span 0.9867 -> 0.9897 Offset: 0.04ppm Notes: External serial port did not work
2015-04-23	1594	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the Eat End tower to replace sn 0418 for calibration.
2015-05-28	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2015-01-21 RSSI=84%, Optical RH=4% Ambient P=101.54kPa, Tair=21C Zero Air at 1200psi, AMP CH4 1.9966 at 2050 CH4 Zero Offset: 0.026ppm CH4 Span Offset: 0.0ppm Notes: Light breeze, partly cloudy, warm
2015-07-20	1594	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End to be replaced by LI-7500A set.
2015-07-20	75H-2182	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End Tower to upgrade the eddy system - replacing older equipment
2015-11-10	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2015-07-15 AGC=87.4 SDM=6 DAC1=- DAC2=- Ambient P=100.94kPa, Tair=21.68C, Tdew=6.22C Zero Air at 700psi, God CO2 421.22 at 700 Tdewspan=11.08 CO2 zero 0.8825 -> 0.8833 Offset: 3.48ppm CO2 span 1.0064 -> 1.0197 Offset: -7.02ppm H2O zero 0.8458 -> 0.8464 Offset: 4.0ppm H2O span 1.0016 -> 1.0242 Offset: -0.43ppm Notes:
2015-09-30	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2015-05-28 RSSI=73%, Optical RH=5% Ambient P=101.5kPa, Tair=18.8C Zero Air at 1000psi, AMP CH4 1.9966 at 1600 CH4 Zero Offset: 0.014ppm CH4 Span Offset: 0.0024ppm Notes: Raining, breezy, The clock was reading 1970 on arrival - fixed before calibration.
2015-10-29	75H-2182	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2176
2015-11-10	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2015-07-15 AGC=87.4 SDM=6 DAC1=- DAC2=- Ambient P=100.94kPa, Tair=21.68C, Tdew=6.22C Zero Air at 700psi, God CO2 421.22 at 700 Tdewspan=11.08 CO2 zero 0.8825 -> 0.8833 Offset: 3.48ppm CO2 span 1.0064 -> 1.0197 Offset: -7.02ppm H2O zero 0.8458 -> 0.8464 Offset: 4.0ppm H2O span 1.0016 -> 1.0242 Offset: -0.43ppm Notes:
2015-10-29	75H-2176	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2182 for calibration.
2016-02-22	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2015-10-28 AGC=91.38 SDM=6 DAC1=- DAC2=- Ambient P=100.94kPa, Tair=23.4C, Tdew=8.96C Zero Air at 650psi, God CO2 421.22 at 700 Tdewspan=11.09 CO2 zero 0.8691 -> 0.8692 Offset: 0.55ppm CO2 span 1.0177 -> 1.0205 Offset: -1.47ppm H2O zero 0.8565 -> 0.8564 Offset: -0.6ppm H2O span 1.0086 -> 1.0136 Offset: -0.1ppm Notes:
2016-02-11	75H-2176	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the East End tower for calibration. Replaced by sn 75H-2514
2016-02-22	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2015-10-28 AGC=91.38 SDM=6 DAC1=- DAC2=- Ambient P=100.94kPa, Tair=23.4C, Tdew=8.96C Zero Air at 650psi, God CO2 421.22 at 700 Tdewspan=11.09 CO2 zero 0.8691 -> 0.8692 Offset: 0.55ppm CO2 span 1.0177 -> 1.0205 Offset: -1.47ppm H2O zero 0.8565 -> 0.8564 Offset: -0.6ppm H2O span 1.0086 -> 1.0136 Offset: -0.1ppm Notes:
2016-02-11	75H-2514	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End tower to replace sn 75H-2176 for calibration
2016-06-03	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2016-02-09 AGC=103.3 SDM=6 DAC1=- DAC2=- Ambient P=100.04kPa, Tair=25.86C, Tdew=13.67C Zero Air at 500psi, God CO2 421.22 at 500 Tdewspan=15.08 CO2 zero 0.905 -> 0.9047 Offset: -1.32ppm CO2 span 1.0028 -> 1.0055 Offset: -1.52ppm H2O zero 0.8364 -> 0.8368 Offset: 15.3ppm H2O span 1.0226 -> 1.0150 Offset: 0.16ppm Notes: The spars were very dirty with clinging dust.
2016-04-13	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2015-09-30 RSSI=86.86%, Optical RH=12% Ambient P=101.2kPa, Tair=20.94C Zero Air at 950psi, AMP CH4 1.9966 at 850 CH4 Zero Offset: 0.002ppm CH4 Span Offset: -0.010ppm Notes: Gusty breeze
2016-05-24	75H-2514	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed LI7500 from East End tower for calibration. Replaced with LI 75H-2150.
2016-06-03	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2016-02-09 AGC=103.3 SDM=6 DAC1=- DAC2=- Ambient P=100.04kPa, Tair=25.86C, Tdew=13.67C Zero Air at 500psi, God CO2 421.22 at 500 Tdewspan=15.08 CO2 zero 0.905 -> 0.9047 Offset: -1.32ppm CO2 span 1.0028 -> 1.0055 Offset: -1.52ppm H2O zero 0.8364 -> 0.8368 Offset: 15.3ppm H2O span 1.0226 -> 1.0150 Offset: 0.16ppm Notes: The spars were very dirty with clinging dust.
2016-05-24	75H-2150	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed LI7500 at East End tower, replaced sn 75H-2514 which was taken down for calibration.
2016-09-12	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2016-05-13 AGC=99.0 SDM=6 DAC1=- DAC2=- Ambient P=99.83kPa, Tair=19.51C, Tdew=10.68C Zero Air at 400psi, God CO2 421.22 at 400 Tdewspan=10.6 CO2 zero 0.902 -> 0.9019 Offset: -0.58ppm CO2 span 1.008 -> 1.0084 Offset: -0.29ppm H2O zero 0.8668 -> 0.8662 Offset: -4.1ppm H2O span 1.0109 -> 1.0155 Offset: -0.1ppm Notes:
2016-08-31	75H-2150	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from the East End tower for calibration. Replaced by sn 1594.
2016-09-12	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2016-05-13 AGC=99.0 SDM=6 DAC1=- DAC2=- Ambient P=99.83kPa, Tair=19.51C, Tdew=10.68C Zero Air at 400psi, God CO2 421.22 at 400 Tdewspan=10.6 CO2 zero 0.902 -> 0.9019 Offset: -0.58ppm CO2 span 1.008 -> 1.0084 Offset: -0.29ppm H2O zero 0.8668 -> 0.8662 Offset: -4.1ppm H2O span 1.0109 -> 1.0155 Offset: -0.1ppm Notes:
2016-08-31	1594	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on the East End tower to replace sn 75H-2150 for calibration.
2016-09-13	1594	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE tower for calibration. Replaced with 75H-2514. Accidentally swapped the LI7500 at EE at this date, had not reached it's official swap period.
2016-09-13	75H-2514	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE tower after calibration to replace sn 1594. Accidentally swapped the LI7500 at EE at this date, had not reached it's official swap period.
2016-12-23	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2016-09-12 AGC=103.3 SDM=1 DAC1=- DAC2=- Ambient P=99.98kPa, Tair=15.95C, Tdew=7.22C Zero Air at 300psi, God CO2 421.22 at 400 Tdewspan=14.00 CO2 zero 0.9054 -> 0.9054 Offset: -0.1ppm CO2 span 1.0092 -> 1.0135 Offset: -2.47ppm H2O zero 0.8371 -> 0.8356 Offset: -10.3ppm H2O span 1.0239 -> 1.0225 Offset: 0.04ppm Notes: First calibration after upgrading embedded software to v8.0.0. Changed bandwidth to 10Hz for 20Hz sampling.
2016-10-11	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2016-04-13 RSSI=82%, Optical RH=21% Ambient P=101.6kPa, Tair=21.1C zero air at 800psi, AMP CH4 4.030 at 1400 CH4 Zero Offset: 0.020ppm CH4 Span Offset: 0.010ppm Notes: Breezy
2016-12-21	75H-2514	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration in the lab. Replaced by 75H-2669.
2016-12-23	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2016-09-12 AGC=103.3 SDM=1 DAC1=- DAC2=- Ambient P=99.98kPa, Tair=15.95C, Tdew=7.22C Zero Air at 300psi, God CO2 421.22 at 400 Tdewspan=14.00 CO2 zero 0.9054 -> 0.9054 Offset: -0.1ppm CO2 span 1.0092 -> 1.0135 Offset: -2.47ppm H2O zero 0.8371 -> 0.8356 Offset: -10.3ppm H2O span 1.0239 -> 1.0225 Offset: 0.04ppm Notes: First calibration after upgrading embedded software to v8.0.0. Changed bandwidth to 10Hz for 20Hz sampling.
2016-12-21	75H-2669	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End after calibration in the lab to replace 75H-2514
2017-03-21	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2016-12-19 AGC=104.3 SDM= DAC1= DAC2= Ambient P=99.8kPa, Tair=23.16C, Tdew=9.9C Zero Air at 1700psi, God CO2 421.22 at 350 Tdewspan=16.00 CO2 zero 0.9184 -> 0.9191 Offset: 2.77ppm CO2 span 1.0119 -> 1.0115 Offset: 0.10ppm H2O zero 0.8989 -> 0.8978 Offset: -7.0ppm H2O span 1.0109 -> 1.0138 Offset: -0.07ppm Notes:
2017-03-15	75H-2669	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End and brought back to lab for calibration. It was replaced by sn 75H-2514.
2017-03-21	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2016-12-19 AGC=104.3 SDM= DAC1= DAC2= Ambient P=99.8kPa, Tair=23.16C, Tdew=9.9C Zero Air at 1700psi, God CO2 421.22 at 350 Tdewspan=16.00 CO2 zero 0.9184 -> 0.9191 Offset: 2.77ppm CO2 span 1.0119 -> 1.0115 Offset: 0.10ppm H2O zero 0.8989 -> 0.8978 Offset: -7.0ppm H2O span 1.0109 -> 1.0138 Offset: -0.07ppm Notes:
2017-03-15	75H-2514	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace 75H-2669.
2017-06-20	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2017-03-14 AGC=102.2 SDM= DAC1= DAC2= Ambient P=100.9kPa, Tair=25.7C, Tdew=13.2C Zero Air at 1500psi, NOAA Ait 402.69 at 1650 Tdewspan=16.00 CO2 zero 0.9046 -> .9041 Offset: -2.08ppm CO2 span 1.0139 -> 1.0115 Offset: 0.96ppm H2O zero 0.8368 -> .8378 Offset: 6.4ppm H2O span 1.0106 -> 1.0019 Offset: 0.20ppm Notes:
2017-03-23	TG1-0155	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2016-10-11 RSSI=90.5%, Optical RH=25% Ambient P=102.2kPa, Tair=14.6C Zero Air at 750psi, Ameriflux CH4 4.0304 at 850 CH4 Zero Offset: -0.008ppm CH4 Span Offset: -0.0251ppm Notes: Changed dessicant but did not flush out head with dry air.
2017-06-01	0065	LI-7500A	Installed	Gas Analyzer T1 CO2/H2O	Installed at open water temporary tower in East End wetland
2017-11-28	0065	LI-7500A	Calibration	Lab	Last calibration: 2017-05-30 AGC=100.0 SDM=0 DAC1=0 DAC2=0 Ambient P=100.5kPa, Tair=23.0C, Tdew=8.7C Zero Air at 300psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.8901 -> .8906 Offset: 2.12ppm CO2 span 1.013 -> 1.0163 Offset: -1.35ppm H2O zero 0.7087 -> .7083 Offset: -3.0ppm H2O span 1.0166 -> 1.0126 Offset: 0.08ppm Notes: Calibrated on 7550 software version 8.7.5
2017-06-14	75H-2514	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed LI7500 from East End for calibration, replaced with 75H-2150.
2017-06-20	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2017-03-14 AGC=102.2 SDM= DAC1= DAC2= Ambient P=100.9kPa, Tair=25.7C, Tdew=13.2C Zero Air at 1500psi, NOAA Ait 402.69 at 1650 Tdewspan=16.00 CO2 zero 0.9046 -> .9041 Offset: -2.08ppm CO2 span 1.0139 -> 1.0115 Offset: 0.96ppm H2O zero 0.8368 -> .8378 Offset: 6.4ppm H2O span 1.0106 -> 1.0019 Offset: 0.20ppm Notes:
2017-06-14	75H-2150	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End after calibration in the lab to replace LI7500 sn 75H-2514.
2017-10-11	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2017-05-30 AGC=96.8 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=23.9C, Tdew=5.5C Zero Air at 500psi, AMP CO2 408.97 at 2000 Tdewspan=16.0 CO2 zero 0.9024 -> 0.9018 Offset: -2.42ppm CO2 span 1.0194 -> 1.0070 Offset: 6.38ppm H2O zero 0.8664 -> 0.8649 Offset: -10.1ppm H2O span 0.9975 -> 1.0090 Offset: 0.24ppm Notes:
2017-09-13	75H-2150	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. It was replaced by sn 0041.
2017-10-11	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2017-05-30 AGC=96.8 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=23.9C, Tdew=5.5C Zero Air at 500psi, AMP CO2 408.97 at 2000 Tdewspan=16.0 CO2 zero 0.9024 -> 0.9018 Offset: -2.42ppm CO2 span 1.0194 -> 1.0070 Offset: 6.38ppm H2O zero 0.8664 -> 0.8649 Offset: -10.1ppm H2O span 0.9975 -> 1.0090 Offset: 0.24ppm Notes:
2017-09-13	0041	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2150 for calibration.
2018-02-20	0041	LI-7500A	Calibration	Lab	Last calibration: 2017-09-11 AGC=98.4 SDM=0 DAC1=0 DAC2=0 Ambient P=101.1kPa, Tair=23.8C, Tdew=-2.4C Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.9969 -> .9971 Offset: .92ppm CO2 span 1.0155 -> 1.0195 Offset: -1.93ppm H2O zero 0.82 -> .8187 Offset: -7.5ppm H2O span 1.0217 -> 1.0217 Offset: 0ppm Notes: I didn't do a H2O span because the sensor's dewpoint measurement was hovering around 2C, and then dropping towards 0C over 30 minutes. There may be a problem with the dewpoint generator.
2017-10-19	0065	LI-7500A	Removed	Gas Analyzer T1 CO2/H2O	Removed with decommissioning of East End Open Water tower (temporary tower 1)
2017-11-28	0065	LI-7500A	Calibration	Lab	Last calibration: 2017-05-30 AGC=100.0 SDM=0 DAC1=0 DAC2=0 Ambient P=100.5kPa, Tair=23.0C, Tdew=8.7C Zero Air at 300psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.8901 -> .8906 Offset: 2.12ppm CO2 span 1.013 -> 1.0163 Offset: -1.35ppm H2O zero 0.7087 -> .7083 Offset: -3.0ppm H2O span 1.0166 -> 1.0126 Offset: 0.08ppm Notes: Calibrated on 7550 software version 8.7.5
2017-11-10	TG1-0155	LI-7700	Removed	Gas Analyzer CH4	Removed from EE and brought back to the lab for calibration. It was replaced by sn TG1-0357.
2017-11-10	TG1-0357	LI-7700	Installed	Gas Analyzer CH4	Installed at EE to replace sn TG1-0155, which was brought back to the lab for calibration.
2017-12-18	0041	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2669
2018-02-20	0041	LI-7500A	Calibration	Lab	Last calibration: 2017-09-11 AGC=98.4 SDM=0 DAC1=0 DAC2=0 Ambient P=101.1kPa, Tair=23.8C, Tdew=-2.4C Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00 CO2 zero 0.9969 -> .9971 Offset: .92ppm CO2 span 1.0155 -> 1.0195 Offset: -1.93ppm H2O zero 0.82 -> .8187 Offset: -7.5ppm H2O span 1.0217 -> 1.0217 Offset: 0ppm Notes: I didn't do a H2O span because the sensor's dewpoint measurement was hovering around 2C, and then dropping towards 0C over 30 minutes. There may be a problem with the dewpoint generator.
2017-12-18	75H-2669	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed on East End to replace sn 0041 for calibration. The AIU software was upgrade from v8.0.0 to v8.5.0
2018-06-25	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2017-12-15 AGC=104.2 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=26.1C, Tdew=11.9C Zero Air at 350psi, AMP 408.97 at 1350 Tdewspan=15.99 CO2 zero 0.9187 -> 0.9182 Offset: -2.11ppm CO2 span 1.0157 -> 1.0125 Offset: 1.68ppm H2O zero 0.8988 -> 0.8994 Offset: 3.3ppm H2O span 1.0033 -> 1.0062 Offset: -0.06ppm Notes: Calibrated by Joe
2018-04-20	75H-2669	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE and brought back to the lab for calibration. It was replaced by sn 0073.
2018-06-25	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2017-12-15 AGC=104.2 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=26.1C, Tdew=11.9C Zero Air at 350psi, AMP 408.97 at 1350 Tdewspan=15.99 CO2 zero 0.9187 -> 0.9182 Offset: -2.11ppm CO2 span 1.0157 -> 1.0125 Offset: 1.68ppm H2O zero 0.8988 -> 0.8994 Offset: 3.3ppm H2O span 1.0033 -> 1.0062 Offset: -0.06ppm Notes: Calibrated by Joe
2018-04-20	0073	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 75H-2669, which was brought back to the lab for calibration.
2018-09-26	0073	LI-7500A	Calibration	Lab	Last calibration: 2018-04-13 AGC=99.7 SDM=0 DAC1=0 DAC2=0 Ambient P=100.5kPa, Tair=25.8C, Tdew=13.3C Zero Air at 1600psi, AMP Air 408.97 at 1200 Tdewspan=16.00 CO2 zero 0.9575 -> .9569 Offset: -2.02ppm CO2 span 1.0145 -> 1.0112 Offset: 1.56ppm H2O zero 0.7295 -> .7314 Offset: 2.0ppm H2O span 1.0131 -> 1.0183 Offset: -.12ppm Notes:
2018-05-16	TG1-0357	LI-7700	Removed	Gas Analyzer CH4	Removed from the East End tower for calibration. Replaced by sn TG1-0421
2018-05-16	TG1-0421	LI-7700	Installed	Gas Analyzer CH4	Installed on the East End tower to replace sn TG1-0357 for calibration
2018-07-12	0073	LI-7500A	Removed	Gas Analyzer CO2/H2O	This sensor was removed from EE and brought back to the lab for calibration. it was replaced by sn 75H-2176.
2018-09-26	0073	LI-7500A	Calibration	Lab	Last calibration: 2018-04-13 AGC=99.7 SDM=0 DAC1=0 DAC2=0 Ambient P=100.5kPa, Tair=25.8C, Tdew=13.3C Zero Air at 1600psi, AMP Air 408.97 at 1200 Tdewspan=16.00 CO2 zero 0.9575 -> .9569 Offset: -2.02ppm CO2 span 1.0145 -> 1.0112 Offset: 1.56ppm H2O zero 0.7295 -> .7314 Offset: 2.0ppm H2O span 1.0131 -> 1.0183 Offset: -.12ppm Notes:
2018-07-12	75H-2176	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 0073, which was brought back to the lab for calibration.
2019-01-02	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2018-07-10 AGC=102 SDM=0 DAC1=0 DAC2=0 Ambient P=101.2kPa, Tair=20.5C, Tdew=3.3C Zero Air at 1250psi, AMP Air 408.97 at 850 Tdewspan=16.00 CO2 zero 0.8671 -> .8676 Offset: 2.45ppm CO2 span 1.0029 -> 1.0114 Offset: -4.48ppm H2O zero 0.848 -> .8525 Offset: 27.5ppm H2O span 0.9088 -> .8206 Offset: -.27ppm Notes: H2O zero offset larger than I expected, but H2O span seems fine.
2018-10-28	75H-2176	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE and brought back to the lab for calibration. It was replaced by sn 75H-2150.
2019-01-02	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2018-07-10 AGC=102 SDM=0 DAC1=0 DAC2=0 Ambient P=101.2kPa, Tair=20.5C, Tdew=3.3C Zero Air at 1250psi, AMP Air 408.97 at 850 Tdewspan=16.00 CO2 zero 0.8671 -> .8676 Offset: 2.45ppm CO2 span 1.0029 -> 1.0114 Offset: -4.48ppm H2O zero 0.848 -> .8525 Offset: 27.5ppm H2O span 0.9088 -> .8206 Offset: -.27ppm Notes: H2O zero offset larger than I expected, but H2O span seems fine.
2018-10-28	75H-2150	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 75H-2176, which was brought back to the lab for calibration.
2019-04-15	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2018-10-24 AGC=97.2 SDM=0 DAC1=- DAC2=- Ambient P=100.19kPa, Tair=26.84C, Tdew=7.32C Zero Air 369068 at 1100psi, AMP CA04396 408.97 at 750 Tdewspan=15.99 CO2 zero 0.9021 -> 0.9014 Offset: -3.16ppm CO2 span 1.005 -> 1.0030 Offset: 0.86ppm H2O zero 0.866 -> 0.8671 Offset: 8.0ppm H2O span 1.0069 -> 1.0077 Offset: -0.02ppm Notes: By Joe
2018-11-01	TG1-0421	LI-7700	Removed	Gas Analyzer CH4	Removed from EE and brought back to the lab for a power board replacement and calibration. It was replaced by sn TG1-0423
2018-11-01	TG1-0423	LI-7700	Installed	Gas Analyzer CH4	Installed at EE to replace sn TG1-0421, which was brought back to the lab for a power board replacement and calibration.
2019-02-12	TG1-0423	LI-7700	Upgrade	Gas Analyzer CH4	Upgraded firmware (embedded software) from 1.0.23 to 1.0.27. Licor change log: "Expanded a buffer in the DSP to prevent phase changes in the DSP data caused when the buffer filled up. This fixes the synchronization loss and resultant data loss between the LI-7550 and LI-7700."
2019-02-12	75H-2150	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE and brought back to the lab for calibration. It was replaced by sn 75H-2667.
2019-04-15	75H-2150	LI-7500A	Calibration	Lab	Last calibration: 2018-10-24 AGC=97.2 SDM=0 DAC1=- DAC2=- Ambient P=100.19kPa, Tair=26.84C, Tdew=7.32C Zero Air 369068 at 1100psi, AMP CA04396 408.97 at 750 Tdewspan=15.99 CO2 zero 0.9021 -> 0.9014 Offset: -3.16ppm CO2 span 1.005 -> 1.0030 Offset: 0.86ppm H2O zero 0.866 -> 0.8671 Offset: 8.0ppm H2O span 1.0069 -> 1.0077 Offset: -0.02ppm Notes: By Joe
2019-02-12	75H-2667	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 75H-2150, which was brought back to the lab for calibration.
2019-07-24	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2019-02-11 AGC=104.1 SDM= DAC1= DAC2= Ambient P=100.4kPa, Tair=26.7C, Tdew=11.7C Zero Air at 1000psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9425 -> .9413 Offset: -4.47ppm CO2 span 1.0143 -> 1.0158 Offset: -.77ppm H2O zero 0.8349 -> .8363 Offset: 8.7ppm H2O span 1.0222 -> 1.0222 Offset: -.02ppm Notes: When the SS was 104.1, I reset it to 100.0
2019-04-11	TG1-0423	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2018-10-30 RSSI=73%, Optical RH=11% Ambient P=101.9kPa, Tair=16.5C Zero Air M4002 at 1700psi, AMP CA03923 3.121 at 1800 CH4 Zero Offset: 0.036ppm CH4 Span Offset: 0.013ppm Notes: Windy day
2019-05-02	75H-2667	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE and brought back to the lab for calibration. it was replaced by sn 0035.
2019-07-24	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2019-02-11 AGC=104.1 SDM= DAC1= DAC2= Ambient P=100.4kPa, Tair=26.7C, Tdew=11.7C Zero Air at 1000psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9425 -> .9413 Offset: -4.47ppm CO2 span 1.0143 -> 1.0158 Offset: -.77ppm H2O zero 0.8349 -> .8363 Offset: 8.7ppm H2O span 1.0222 -> 1.0222 Offset: -.02ppm Notes: When the SS was 104.1, I reset it to 100.0
2019-05-02	0035	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 75H-2667, which was brought back to the lab for calibration.
2019-08-01	0035	LI-7500A	Calibration	Lab	Last calibration: 2019-04-26 AGC=99.2 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=24.0C, Tdew=13.8C Zero Air at 975psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9371 -> .9374 Offset: 1.23ppm CO2 span 1.0189 -> 1.0207 Offset: -.96ppm H2O zero 0.8989 -> .8984 Offset: -2.9ppm H2O span 1.0186 -> 1.0323 Offset: -.29ppm Notes: When the SS was 99.2, I reset it to 100. I uploaded the the calibration file from 2018-10-24 and copied in the manual coefficients for CO2 span, CO2 zero, H2O span, and H2O zero from the database's record of the most recent calibration on 2019-04-15.
2019-07-25	0035	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from EE and brought back to the lab for calibration. it was replaced by 75H-2176.
2019-08-01	0035	LI-7500A	Calibration	Lab	Last calibration: 2019-04-26 AGC=99.2 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=24.0C, Tdew=13.8C Zero Air at 975psi, AMP CA4396 408.97 at 800 Tdewspan=20.00 CO2 zero 0.9371 -> .9374 Offset: 1.23ppm CO2 span 1.0189 -> 1.0207 Offset: -.96ppm H2O zero 0.8989 -> .8984 Offset: -2.9ppm H2O span 1.0186 -> 1.0323 Offset: -.29ppm Notes: When the SS was 99.2, I reset it to 100. I uploaded the the calibration file from 2018-10-24 and copied in the manual coefficients for CO2 span, CO2 zero, H2O span, and H2O zero from the database's record of the most recent calibration on 2019-04-15.
2019-07-25	75H-2176	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at EE to replace sn 0035, which was brought back to the lab for calibration.
2019-11-13	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2019-07-24 AGC=99.5 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=25.6C, Tdew=11.4C Zero Air at 900psi, AMP CA4396 408.97 at 650 Tdewspan=16.00 CO2 zero 0.8672 -> .8675 Offset: 1.36ppm CO2 span 1.0061 -> 1.0072 Offset: -.67ppm H2O zero 0.8521 -> .8520 Offset: -1.0ppm H2O span 0.9182 -> .9123 Offset: .13ppm Notes: Did an initial calibration yesterday using config file 2019-07-24, but it had a large H2O zero offset (-35.7 mmol/m3) and H2O span offset (1.53C). Today I did another calibration, again from the config file 2019-07-24. Today the H2O offset/span seem ok, so not sure what was happening yesterday. I saved today's new config file and deleted yesterday's to avoid confusion.
2019-10-22	TG1-0423	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2019-04-11 RSSI=83%, Optical RH=17% Ambient P=102.0kPa, Tair=24.6C Zero Air at 1300psi, AMP CA03923 3.121 at 1400 CH4 Zero Offset: 0.023ppm CH4 Span Offset: -0.001ppm Notes:
2019-10-31	75H-2176	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2514.
2019-11-13	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2019-07-24 AGC=99.5 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=25.6C, Tdew=11.4C Zero Air at 900psi, AMP CA4396 408.97 at 650 Tdewspan=16.00 CO2 zero 0.8672 -> .8675 Offset: 1.36ppm CO2 span 1.0061 -> 1.0072 Offset: -.67ppm H2O zero 0.8521 -> .8520 Offset: -1.0ppm H2O span 0.9182 -> .9123 Offset: .13ppm Notes: Did an initial calibration yesterday using config file 2019-07-24, but it had a large H2O zero offset (-35.7 mmol/m3) and H2O span offset (1.53C). Today I did another calibration, again from the config file 2019-07-24. Today the H2O offset/span seem ok, so not sure what was happening yesterday. I saved today's new config file and deleted yesterday's to avoid confusion.
2019-10-31	75H-2514	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2176 for calibration.
2020-03-02	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2019-10-30 AGC=100.2 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=25.5C, Tdew=-6.0C Zero Air at 800psi, AMP CA4396 408.97 at 550 Tdewspan=16.00 CO2 zero 0.9047 -> .9051 Offset: 1.66ppm CO2 span 1.0064 -> 1.0104 Offset: -1.92ppm H2O zero 0.8391 -> .8393 Offset: 1.3ppm H2O span 1.0156 -> 1.0173 Offset: -.04ppm Notes: Ambient air very dry.
2020-02-20	75H-2514	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2182.
2020-03-02	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2019-10-30 AGC=100.2 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=25.5C, Tdew=-6.0C Zero Air at 800psi, AMP CA4396 408.97 at 550 Tdewspan=16.00 CO2 zero 0.9047 -> .9051 Offset: 1.66ppm CO2 span 1.0064 -> 1.0104 Offset: -1.92ppm H2O zero 0.8391 -> .8393 Offset: 1.3ppm H2O span 1.0156 -> 1.0173 Offset: -.04ppm Notes: Ambient air very dry.
2020-02-20	75H-2182	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2514 for calibration.
2020-05-20	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2020-02-19 AGC=100.0 SDM=0 DAC1=- DAC2=- Ambient P=100.9kPa, Tair=21.1C, Tdew=10.5C Zero Air at 800psi, AMP CA04396 408.97 at 600 Tdewspan=61.0 CO2 zero 0.885 -> 0.8849 Offset: -0.07ppm CO2 span 1.0232 -> 1.0267 Offset: -1.72ppm H2O zero 0.8459 -> 0.8471 Offset: 7.5ppm H2O span 1.0249 -> 1.0159 Offset: 0.18ppm Notes:
2020-05-19	TG1-0423	LI-7700	Calibration	Gas Analyzer CH4	Calibration Location: East End Last calibration: 2019-10-22 RSSI=83%, Optical RH=20% Ambient P=101.5kPa, Tair=22.5C Zero Air at 900psi, AMP CA3923 3.121 at 850 CH4 Zero Offset: 0.01ppm CH4 Span Offset: 0.006ppm Notes: Swapped optics desiccant (indicating drierite) after calibration. Used zero air cal gas to dry out head space. New RH ~7%.
2020-05-19	75H-2182	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End and brought back to the lab for calibration. Replaced by sn 0042.
2020-05-20	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2020-02-19 AGC=100.0 SDM=0 DAC1=- DAC2=- Ambient P=100.9kPa, Tair=21.1C, Tdew=10.5C Zero Air at 800psi, AMP CA04396 408.97 at 600 Tdewspan=61.0 CO2 zero 0.885 -> 0.8849 Offset: -0.07ppm CO2 span 1.0232 -> 1.0267 Offset: -1.72ppm H2O zero 0.8459 -> 0.8471 Offset: 7.5ppm H2O span 1.0249 -> 1.0159 Offset: 0.18ppm Notes:
2020-05-19	0042	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2182 for calibration.
2020-08-25	0042	LI-7500A	Calibration	Lab	Last calibration: 2020-05-13 AGC=99.6 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.3C, Tdew=14.3C Zero Air at 700psi, AMP CA04396 408.97 at 500 Tdewspan=20.0 CO2 zero 0.9481 -> 0.9479 Offset: -0.8ppm CO2 span 1.0141 -> 1.0073 Offset: 3.43ppm H2O zero 0.8441 -> 0.8441 Offset: -0.5ppm H2O span 1.0271 -> 1.0268 Offset: 0ppm Notes:
2020-08-21	0042	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 1594.
2020-08-25	0042	LI-7500A	Calibration	Lab	Last calibration: 2020-05-13 AGC=99.6 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=23.3C, Tdew=14.3C Zero Air at 700psi, AMP CA04396 408.97 at 500 Tdewspan=20.0 CO2 zero 0.9481 -> 0.9479 Offset: -0.8ppm CO2 span 1.0141 -> 1.0073 Offset: 3.43ppm H2O zero 0.8441 -> 0.8441 Offset: -0.5ppm H2O span 1.0271 -> 1.0268 Offset: 0ppm Notes:
2020-08-21	1594	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 0042 for calibration.
2020-11-19	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2020-05-19 RSSI=77%, Optical RH=12% Ambient P=102.4kPa, Tair=18C Zero Air at 500psi, AMP CA3923 3.121 at 500 CH4 Zero Offset: -0.05ppm CH4 Span Offset: -0.002ppm Notes: Breezy day
2020-12-03	1594	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 0041.
2020-12-03	0041	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 1594 for calibration.
2021-05-25	0041	LI-7500A	Calibration	Lab	Last calibration: 2020-12-02 AGC=100 SDM=0 DAC1=- DAC2=- Ambient P=100.7kPa, Tair=25.9C, Tdew=10.2C Zero Air at 350psi, AMP CA03923 474.19 at 500 Tdewspan=20.0 CO2 zero 0.9971 -> 0.9966 Offset: -1.8ppm CO2 span 1.019 -> 1.0137 Offset: 3.31ppm H2O zero 0.8209 -> 0.8206 Offset: -2.0ppm H2O span 1.0273 -> 1.0266 Offset: 0.02ppm Notes: I initially forgot to load the previous coefficients file. At that time the signal strength was reading 106.3 and I reset it to 100. Then I remembered to load the previous cal file but only the CO2 and H2O readings changed. It was calibrated with the correct coefficients.
2021-03-16	0041	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration and brought back to the lab. Replaced by sn 0065.
2021-05-25	0041	LI-7500A	Calibration	Lab	Last calibration: 2020-12-02 AGC=100 SDM=0 DAC1=- DAC2=- Ambient P=100.7kPa, Tair=25.9C, Tdew=10.2C Zero Air at 350psi, AMP CA03923 474.19 at 500 Tdewspan=20.0 CO2 zero 0.9971 -> 0.9966 Offset: -1.8ppm CO2 span 1.019 -> 1.0137 Offset: 3.31ppm H2O zero 0.8209 -> 0.8206 Offset: -2.0ppm H2O span 1.0273 -> 1.0266 Offset: 0.02ppm Notes: I initially forgot to load the previous coefficients file. At that time the signal strength was reading 106.3 and I reset it to 100. Then I remembered to load the previous cal file but only the CO2 and H2O readings changed. It was calibrated with the correct coefficients.
2021-03-16	0065	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 0041 for calibration.
2021-06-01	0065	LI-7500A	Calibration	Lab	Last calibration: 2021-03-15 AGC=101.2 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=21.2C, Tdew=10.6C Zero Air at 300psi, AMP CA04119 524.77 at 1800 Tdewspan=16.0 CO2 zero 0.8914 -> 0.8913 Offset: -0.2ppm CO2 span 1.0153 -> 1.0201 Offset: -3.27ppm H2O zero 0.7311 -> 0.7305 Offset: -4.1ppm H2O span 1.017 -> 1.0158 Offset: 0.0ppm Notes:
2021-05-26	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2020-11-19 RSSI=80%, Optical RH=13% Ambient P=101.5kPa, Tair=29.2C AMP FB04161 at 500psi, AMP CA04119 4.223 at 2050 CH4 Zero Offset: 0ppm CH4 Span Offset: 0.008ppm Notes: Relatively still day. Zero gas was an AMP cal gas in a baby tank that we borrowed for the day. Zero was right on.
2021-05-26	0065	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 1594.
2021-06-01	0065	LI-7500A	Calibration	Lab	Last calibration: 2021-03-15 AGC=101.2 SDM=0 DAC1=- DAC2=- Ambient P=100.4kPa, Tair=21.2C, Tdew=10.6C Zero Air at 300psi, AMP CA04119 524.77 at 1800 Tdewspan=16.0 CO2 zero 0.8914 -> 0.8913 Offset: -0.2ppm CO2 span 1.0153 -> 1.0201 Offset: -3.27ppm H2O zero 0.7311 -> 0.7305 Offset: -4.1ppm H2O span 1.017 -> 1.0158 Offset: 0.0ppm Notes:
2021-05-26	1594	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 0065 for calibration.
2021-10-07	1594	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2667.
2021-10-07	75H-2667	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 1594 for calibration.
2022-03-02	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2021-09-29 AGC=100 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=24.3C, Tdew=9.1C Zero Air at 950psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.9411 -> .9412 Offset: .2ppm CO2 span 1.0174 -> 1.0171 Offset: .36ppm H2O zero 0.8413 -> .841 Offset: -2.1ppm H2O span 1.0281 -> 1.0180 Offset: .21ppm Notes:
2021-12-01	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2021-06-01 RSSI=83%, Optical RH=15% Ambient P=101.2kPa, Tair=19.2C Zero Air at 1200psi, AMP CA04396 1.9317 at 1800 CH4 Zero Offset: .007ppm CH4 Span Offset: .0023ppm Notes: Relatively still day. Did not change drierite or flush headspace with zero air. Zero air tank pressure uncertain--wonky regulator.
2022-01-20	75H-2667	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 0065.
2022-03-02	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2021-09-29 AGC=100 SDM= DAC1= DAC2= Ambient P=100.5kPa, Tair=24.3C, Tdew=9.1C Zero Air at 950psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.9411 -> .9412 Offset: .2ppm CO2 span 1.0174 -> 1.0171 Offset: .36ppm H2O zero 0.8413 -> .841 Offset: -2.1ppm H2O span 1.0281 -> 1.0180 Offset: .21ppm Notes:
2022-01-20	0065	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2667 for calibration.
2022-04-08	0065	LI-7500A	Calibration	Lab	Last calibration: 2022-01-11 AGC=100.9 SDM= DAC1= DAC2= Ambient P=100.7kPa, Tair=29.96C, Tdew=12.0C Zero Air at 750psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.8912 -> .8908 Offset: -1.86ppm CO2 span 1.0205 -> 1.0198 Offset: .57ppm H2O zero 0.7314 -> .7308 Offset: -4.2ppm H2O span 1.0259 -> 1.0160 Offset: .22ppm Notes: In the field, this sensor had a SS ~110. In the lab the SS was much more normal ~100. I'm not sure why there is a difference, as the config file should be the same.
2022-03-31	0065	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 0041.
2022-04-08	0065	LI-7500A	Calibration	Lab	Last calibration: 2022-01-11 AGC=100.9 SDM= DAC1= DAC2= Ambient P=100.7kPa, Tair=29.96C, Tdew=12.0C Zero Air at 750psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.8912 -> .8908 Offset: -1.86ppm CO2 span 1.0205 -> 1.0198 Offset: .57ppm H2O zero 0.7314 -> .7308 Offset: -4.2ppm H2O span 1.0259 -> 1.0160 Offset: .22ppm Notes: In the field, this sensor had a SS ~110. In the lab the SS was much more normal ~100. I'm not sure why there is a difference, as the config file should be the same.
2022-03-31	0041	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 0065 for calibration.
2022-11-15	0041	LI-7500A	Calibration	Lab	Last calibration: 2022-03-30 AGC=93.5 SDM= DAC1= DAC2= Ambient P=101.2kPa, Tair=22.9C, Tdew=.1C Zero Air at 1900psi, AMP CA04119 524.77 at 1350 Tdewspan=20.00 CO2 zero 0.9969 -> .9998 Offset: 9.35ppm CO2 span 1.0189 -> 1.0178 Offset: .23ppm H2O zero 0.8214 -> .8213 Offset: -.5ppm H2O span 1.0337 -> 1.0308 Offset: .07ppm Notes: Reset SS from 93.5 to 100 before calibrating. Used AMP LI-7550 sn AIU-1039.
2022-06-09	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2021-12-01 RSSI=70%, Optical RH=17% Ambient P=101kPa, Tair=29.5C Zero Air at 350psi, AMP CA04119 4.2238 at 1550 CH4 Zero Offset: .015ppm CH4 Span Offset: -.0098ppm Notes: Hot day, some breeze. Did not change drierite or flush headspace with zero air.
2022-09-15	0041	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2667.
2022-11-15	0041	LI-7500A	Calibration	Lab	Last calibration: 2022-03-30 AGC=93.5 SDM= DAC1= DAC2= Ambient P=101.2kPa, Tair=22.9C, Tdew=.1C Zero Air at 1900psi, AMP CA04119 524.77 at 1350 Tdewspan=20.00 CO2 zero 0.9969 -> .9998 Offset: 9.35ppm CO2 span 1.0189 -> 1.0178 Offset: .23ppm H2O zero 0.8214 -> .8213 Offset: -.5ppm H2O span 1.0337 -> 1.0308 Offset: .07ppm Notes: Reset SS from 93.5 to 100 before calibrating. Used AMP LI-7550 sn AIU-1039.
2022-09-15	75H-2667	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 0041 for calibration.
2023-01-13	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2022-09-15 AGC=102 SDM= DAC1= DAC2= Ambient P=100.3kPa, Tair=20.6C, Tdew=12.3C Zero Air at 1600psi, AMP CA04119 524.77 at 1275 Tdewspan=16.00 CO2 zero 0.9413 -> .9418 Offset: 1.72ppm CO2 span 1.0204 -> 1.0233 Offset: -1.91ppm H2O zero 0.8407 -> .8421 Offset: 8.4ppm H2O span 1.0338 -> 1.0314 Offset: .05ppm Notes: Set span dew point to 16.00C because the usual 20.00C > room's dew point temp.
2023-01-06	75H-2667	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2669.
2023-01-13	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2022-09-15 AGC=102 SDM= DAC1= DAC2= Ambient P=100.3kPa, Tair=20.6C, Tdew=12.3C Zero Air at 1600psi, AMP CA04119 524.77 at 1275 Tdewspan=16.00 CO2 zero 0.9413 -> .9418 Offset: 1.72ppm CO2 span 1.0204 -> 1.0233 Offset: -1.91ppm H2O zero 0.8407 -> .8421 Offset: 8.4ppm H2O span 1.0338 -> 1.0314 Offset: .05ppm Notes: Set span dew point to 16.00C because the usual 20.00C > room's dew point temp.
2023-01-06	75H-2669	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2667 for calibration.
2023-04-10	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2023-01-04 AGC=101.5 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=24.9C, Tdew=10.8C Zero Air at 1300psi, AMP CA04119 524.77 at 1150 Tdewspan=16.00 CO2 zero 0.9187 -> .9207 Offset: 7.69ppm CO2 span 1.0187 -> 1.0176 Offset: 0.83ppm H2O zero 0.9029 -> .9001 Offset: -17.3ppm H2O span 1.033 -> 1.0105 Offset: .47ppm Notes: Offsets are recorded using the 2023-01-04 calibration as the starting config file. Attempted calibration on 4/7 but the H2O zero offset was -38.3 after needing a long time (45+min) to stabilize. The H2O span offset never stabilized. I decided to swap the chemicals then and this is the first calibration since chemical swap.
2023-01-18	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2022-06-09 RSSI=77%, Optical RH=21% Ambient P=101.9kPa, Tair=12.6C Zero Air at 1450psi, AMP CA04396 1.9317 at 1200 CH4 Zero Offset: .025ppm CH4 Span Offset: .0023ppm Notes: After calibration, changed desiccant and flushed headspace with zero air until optics RH=14%.
2023-04-03	75H-2669	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2176.
2023-04-10	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2023-01-04 AGC=101.5 SDM= DAC1= DAC2= Ambient P=100.6kPa, Tair=24.9C, Tdew=10.8C Zero Air at 1300psi, AMP CA04119 524.77 at 1150 Tdewspan=16.00 CO2 zero 0.9187 -> .9207 Offset: 7.69ppm CO2 span 1.0187 -> 1.0176 Offset: 0.83ppm H2O zero 0.9029 -> .9001 Offset: -17.3ppm H2O span 1.033 -> 1.0105 Offset: .47ppm Notes: Offsets are recorded using the 2023-01-04 calibration as the starting config file. Attempted calibration on 4/7 but the H2O zero offset was -38.3 after needing a long time (45+min) to stabilize. The H2O span offset never stabilized. I decided to swap the chemicals then and this is the first calibration since chemical swap.
2023-04-03	75H-2176	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2669 for calibration.
2023-07-20	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2023-03-29 AGC=100.0 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=0C, Tdew=13.45C Zero Air at 1000psi, AMP CA04119 524.77 at 925 Tdewspan=16.00 CO2 zero 0.8679 -> .868 Offset: .3ppm CO2 span 1.013 -> 1.0095 Offset: 2.43ppm H2O zero 0.8562 -> .8525 Offset: -21.4ppm H2O span 0.9316 -> .9124 Offset: .43ppm Notes: Slightly larger H2O zero and span offset than usual. Vertical orientation.
2023-06-15	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2023-01-18 RSSI=82%, Optical RH=16% Ambient P=100.9kPa, Tair=26.7C Zero Air at 1150psi, AMP CA04119 4.2238 at 1000 CH4 Zero Offset: -.06ppm CH4 Span Offset: .0138ppm Notes: Optics RH=16%, which is pretty good, so we did not flush the headspace or change its desiccant.
2023-07-11	75H-2176	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2667.
2023-07-20	75H-2176	LI-7500A	Calibration	Lab	Last calibration: 2023-03-29 AGC=100.0 SDM= DAC1= DAC2= AIU sn AIU-1569, Presure A0=58.004, A1=15.479 Ambient P=100.6kPa, Tair=0C, Tdew=13.45C Zero Air at 1000psi, AMP CA04119 524.77 at 925 Tdewspan=16.00 CO2 zero 0.8679 -> .868 Offset: .3ppm CO2 span 1.013 -> 1.0095 Offset: 2.43ppm H2O zero 0.8562 -> .8525 Offset: -21.4ppm H2O span 0.9316 -> .9124 Offset: .43ppm Notes: Slightly larger H2O zero and span offset than usual. Vertical orientation.
2023-07-11	75H-2667	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2176 for calibration.
2023-12-20	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2023-07-10 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=99.6kPa, Tair=21.7C, Tdew=10.4C Zero Air at 500psi, AMP CA04119 524.77 at 750 Tdewspan=18.0 CO2 zero 0.9411 -> 0.9413 Offset: 0.7ppm CO2 span 1.0232 -> 1.0207 Offset: 1.83ppm H2O zero 0.8427 -> 0.8427 Offset: 0.2ppm H2O span 1.0367 -> 1.0363 Offset: 0.01ppm Notes: Reset SS from 103.0, Database says last cal was 07-14, instrument says 07-10.
2023-10-27	75H-2667	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2182.
2023-12-20	75H-2667	LI-7500A	Calibration	Lab	Last calibration: 2023-07-10 AGC=100.0 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=99.6kPa, Tair=21.7C, Tdew=10.4C Zero Air at 500psi, AMP CA04119 524.77 at 750 Tdewspan=18.0 CO2 zero 0.9411 -> 0.9413 Offset: 0.7ppm CO2 span 1.0232 -> 1.0207 Offset: 1.83ppm H2O zero 0.8427 -> 0.8427 Offset: 0.2ppm H2O span 1.0367 -> 1.0363 Offset: 0.01ppm Notes: Reset SS from 103.0, Database says last cal was 07-14, instrument says 07-10.
2023-10-27	75H-2182	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2667 for calibration.
2024-01-10	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2023-10-23 AGC=103 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.21kPa, Tair=21.2C, Tdew=9.47C Zero Air at 450psi, AMP CA04119 524.77 at 650 Tdewspan=18.00 CO2 zero 0.8848 -> .885 Offset: .94ppm CO2 span 1.0124 -> 1.0163 Offset: -2.06ppm H2O zero 0.8311 -> .8326 Offset: 9.9ppm H2O span 1.0325 -> 1.0352 Offset: -.05ppm Notes: Vertical orientation. Reset SS from 103 to 100 after cal. Used nail polish to cover up some small patches of paint missing from the spars.
2024-01-04	75H-2182	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2180.
2024-01-10	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2023-10-23 AGC=103 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.21kPa, Tair=21.2C, Tdew=9.47C Zero Air at 450psi, AMP CA04119 524.77 at 650 Tdewspan=18.00 CO2 zero 0.8848 -> .885 Offset: .94ppm CO2 span 1.0124 -> 1.0163 Offset: -2.06ppm H2O zero 0.8311 -> .8326 Offset: 9.9ppm H2O span 1.0325 -> 1.0352 Offset: -.05ppm Notes: Vertical orientation. Reset SS from 103 to 100 after cal. Used nail polish to cover up some small patches of paint missing from the spars.
2024-01-04	75H-2180	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2182 for calibration.
2024-03-23	75H-2180	LI-7500A	Calibration	Lab	Last calibration: 2024-01-03 AGC=101.4 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.0kPa, Tair=24.65C, Tdew=11.42C Zero Air at 300psi, AMP CA04119 524.77 at 550 Tdewspan=20.00 CO2 zero 0.9141 -> .9137 Offset: -1.89ppm CO2 span 1.0406 -> 1.0356 Offset: -2.97ppm H2O zero 0.8965 -> .8951 Offset: -8.2ppm H2O span 1.0383 -> 1.0393 Offset: -.01ppm Notes: Used "524.52" as span point in software, otherwise, the post-span reading was too high
2024-01-11	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2023-06-15 RSSI=79%, Optical RH=23% Ambient P=102.2kPa, Tair=16.0C Zero Air at 1800psi, AMP CA03923 3.3865 at 1725 CH4 Zero Offset: .015ppm CH4 Span Offset: .0015ppm Notes: After calibration, flushed headspace with zero air until optics RH=9% and swapped in a bottle with fresh drierite.
2024-01-18	75H-2180	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2182.
2024-03-23	75H-2180	LI-7500A	Calibration	Lab	Last calibration: 2024-01-03 AGC=101.4 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.0kPa, Tair=24.65C, Tdew=11.42C Zero Air at 300psi, AMP CA04119 524.77 at 550 Tdewspan=20.00 CO2 zero 0.9141 -> .9137 Offset: -1.89ppm CO2 span 1.0406 -> 1.0356 Offset: -2.97ppm H2O zero 0.8965 -> .8951 Offset: -8.2ppm H2O span 1.0383 -> 1.0393 Offset: -.01ppm Notes: Used "524.52" as span point in software, otherwise, the post-span reading was too high
2024-01-18	75H-2182	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2180 for calibration.
2024-06-17	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2024-01-10 AGC=100.1 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=20.7C, Tdew=9.1C Zero Air at 1750psi, AMP CA04119 524.77 at 350 Tdewspan=61.0 CO2 zero 0.885 -> 0.8850 Offset: 0.10ppm CO2 span 1.0163 -> 1.0141 Offset: 1.57ppm H2O zero 0.8326 -> 0.8332 Offset: 3.9ppm H2O span 1.0352 -> 1.0365 Offset: -0.02ppm Notes:
2024-04-11	75H-2182	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2669.
2024-06-17	75H-2182	LI-7500A	Calibration	Lab	Last calibration: 2024-01-10 AGC=100.1 SDM=0 DAC1=- DAC2=- AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.1kPa, Tair=20.7C, Tdew=9.1C Zero Air at 1750psi, AMP CA04119 524.77 at 350 Tdewspan=61.0 CO2 zero 0.885 -> 0.8850 Offset: 0.10ppm CO2 span 1.0163 -> 1.0141 Offset: 1.57ppm H2O zero 0.8326 -> 0.8332 Offset: 3.9ppm H2O span 1.0352 -> 1.0365 Offset: -0.02ppm Notes:
2024-04-11	75H-2669	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2182 for calibration.
2024-10-16	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2024-04-10 AGC=99.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=21.6C, Tdew=14.0C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9189 -> .9203 Offset: 5.44ppm CO2 span 1.0177 -> 1.0143 Offset: 2.33ppm H2O zero 0.9012 -> .8979 Offset: -20.0ppm H2O span 1.0115 -> 1.0193 Offset: -.17ppm Notes:
2024-07-23	75H-2669	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2514.
2024-10-16	75H-2669	LI-7500A	Calibration	Lab	Last calibration: 2024-04-10 AGC=99.8 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.4kPa, Tair=21.6C, Tdew=14.0C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9189 -> .9203 Offset: 5.44ppm CO2 span 1.0177 -> 1.0143 Offset: 2.33ppm H2O zero 0.9012 -> .8979 Offset: -20.0ppm H2O span 1.0115 -> 1.0193 Offset: -.17ppm Notes:
2024-07-23	75H-2514	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2669 for calibration.
2024-10-22	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2024-07-23 AGC=99.9 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.6kPa, Tair=25.4C, Tdew=11.9C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9086 -> .9089 Offset: .9ppm CO2 span 0.988 -> .9962 Offset: -5.71ppm H2O zero 0.8457 -> .8476 Offset: 12.5ppm H2O span 0.9823 -> .9936 Offset: -.26ppm Notes:
2024-08-07	TG1-0423	LI-7700	Calibration		Calibration Location: East End Last calibration: 2024-01-11 RSSI=70%, Optical RH=4% Ambient P=101.1kPa, Tair=35.1C Zero Air at 1700psi, AMP CA03923 3.3865 at 1850 CH4 Zero Offset: -.028ppm CH4 Span Offset: -0.0185ppm Notes: Hot day
2024-10-17	75H-2514	LI-7500A	Removed	Gas Analyzer CO2/H2O	Removed from East End for calibration. Replaced by sn 75H-2669.
2024-10-22	75H-2514	LI-7500A	Calibration	Lab	Last calibration: 2024-07-23 AGC=99.9 SDM= DAC1= DAC2= AIU sn AIU-1866, Presure A0=58.31, A1=15.48 Ambient P=100.6kPa, Tair=25.4C, Tdew=11.9C Zero Air at 1100psi, AMP FB04319 514.07 at 850 Tdewspan=20.00 CO2 zero 0.9086 -> .9089 Offset: .9ppm CO2 span 0.988 -> .9962 Offset: -5.71ppm H2O zero 0.8457 -> .8476 Offset: 12.5ppm H2O span 0.9823 -> .9936 Offset: -.26ppm Notes:
2024-10-17	75H-2669	LI-7500A	Installed	Gas Analyzer CO2/H2O	Installed at East End to replace sn 75H-2514 for calibration.
Heat Flux Plate
2013-11-21	6499	HFP01	Installed	Heat Flux Plate B	Installed about 2cm below the surface to the west of the tower at the Twitchell East End Wetland site.
2013-11-25	6649	HFP01	Installed	Heat Flux Plate C	Installed about 2cm below the surface to the west of the tower at the Twitchell East End Wetland site.
2013-11-25	00244	HFP01SC	Installed	Heat Flux Plate A	Installed about 2cm below the surface to the west of the tower at the Twitchell East End Wetland site.
2015-01-05	00244	HFP01SC	Removed	Heat Flux Plate A	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-05	6499	HFP01	Removed	Heat Flux Plate B	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-05	6649	HFP01	Removed	Heat Flux Plate C	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	00244	HFP01SC	Installed	Heat Flux Plate A	Reinstalled after being removed when the scaffolding fell over.
2015-01-20	6499	HFP01	Installed	Heat Flux Plate B	Reinstalled after being removed when the scaffolding fell over.
2015-01-20	6649	HFP01	Installed	Heat Flux Plate C	Reinstalled after being removed when the scaffolding fell over.
2015-05-21	6499	HFP01	Removed	Heat Flux Plate B	Removed from the East End tower due to intermittent bad values.
2017-09-26	6649	HFP01	Lost	Heat Flux Plate C	Cable removed from EE because the cable had been chewed through. The sensor is still lost to the wetland.
2018-01-31	00244	HFP01SC	Removed	Heat Flux Plate A	Removed from EE because it started changing in steps around the end of October. Needs to be inspected and repaired. There are several nicks in the cable and the cable-head connection is loose.
2018-01-31	001604	HFP01	Installed	Heat Flux Plate A	Installed at EE in open patch left of rad boom.
2018-01-31	10822	HFP01	Installed	Heat Flux Plate B	Installed at EE to right of rad boom in vegetation.
Interface
2013-11-25	6763	NL115	Moved	Interface NL115 Eddy	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2014-06-12	3585	A547	Installed	Interface A547	Installed on the Eat End tower with conductivity probe sn 6494
2015-01-05	6763	NL115	Removed	Interface NL115 Eddy	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	6763	NL115	Installed	Interface NL115 Eddy	Reinstalled after being removed when the scaffolding fell over.
2015-07-20	AIU-0397	LI-7550	Installed	Interface LI-7550	Installed on the East End Tower to upgrade the eddy system - replacing older equipment
2015-08-19	6763	NL115	Removed	Interface NL115 Eddy	Removed from the East End tower after becoming obsolete when the Licor flux system was installed.
2016-04-13	AIU-0397	LI-7550	Upgrade	Interface LI-7550	Updated the 7550 firmware from v7.3.0 to v8.0.0 skiping version 7.5.0 Relevant 7.5.0 changes: Main Window is now resizable, Added serial number entry for sonics, Help update, Fixed timeout when saving config files Relevant 8.0.0 changes: Separate bandwidth settings for analog inputs and gas channels, Detection of new RS instruments, Additional calibration coefficients, Added sonic software version entry, Added chopper temp logging.
2017-09-13	3585	A547	Removed	Interface A547	Removed from EE for testing in the lab because the values were flat.
2017-12-18	AIU-0397	LI-7550	Upgrade	Interface LI-7550	The embedded software was upgraded from v8.0.0 to v8.5.0
2019-12-17	3585	A547	Installed	Interface A547	Reinstalled at East End after being removed after getting wet ans possibly causing a short circuit. Tested fine in the lab.
2021-04-15	AIU-0397	LI-7550	Upgrade	Interface LI-7550	Upgraded firmware from v8.5.0 to v8.8.32
Multiplexer
2013-11-25	11663	AM16/32B	Moved	Multiplexer Met	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2013-11-25	6769	AM25T	Moved	Multiplexer Thermocouples	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	11663	AM16/32B	Removed	Multiplexer Met	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-05	6769	AM25T	Removed	Multiplexer Thermocouples	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	11663	AM16/32B	Installed	Data Logger Met	Reinstalled after being removed when the scaffolding fell over.
2015-01-20	6769	AM25T	Installed	Multiplexer Thermocouples	Reinstalled after being removed when the scaffolding fell over.
Narrow Band
2017-06-05	2046503390	SRS-Ni NDVI	Installed	Narrow Band NDVI Incoming	Installed at EE in the incoming position.
2017-06-05	2046503344	SRS-Ni NDVI	Installed	Narrow Band NDVI Reflected	Installed on the East End tower to measure outgoing/reflected light.
2020-08-05	1053	S2-411	Installed	Narrow Band NDVI Incoming B	Installed at EE in the NDVI incoming position
2020-08-05	1054	S2-411	Installed	Narrow Band NDVI Reflected B	Installed at EE in the NDVI outgoing position
2021-03-04	1053	S2-411	Removed	Narrow Band NDVI Incoming B	Removed from East End because it had a lot of NANs. Brought back to the lab for testing.
2021-03-04	1054	S2-411	Removed	Narrow Band NDVI Reflected B	Removed from East End and brought back to the lab for testing. It had some NANs, but might've been influenced by the misbehaving NDVI_in sensor that was wired to the same control port.
2021-03-30	1053	S2-411	Installed	Narrow Band NDVI Incoming B	Installed at EE on radiation boom in incoming position
2021-03-30	1054	S2-411	Installed	Narrow Band NDVI Reflected B	Installed at EE on radiation boom in outoing position
2022-08-30	1053	S2-411	Removed	Narrow Band NDVI Incoming B	Removed from EE and brought back to the lab for testing. This sensor's data was ok but the outgoing(reflected) sensor sn 1054 data was weird, so I brought both sensors in.
2022-08-30	1054	S2-411	Removed	Narrow Band NDVI Reflected B	Removed from EE and brought back to the lab for testing. 650out data is bad.
2024-02-28	2046503390	SRS-Ni NDVI	Removed	Narrow Band NDVI Incoming	Removed from EE tower because most of the SRS NDVI sensors installed in the Delta have been drifting over the past few years
2024-02-28	2046503344	SRS-Ni NDVI	Removed	Narrow Band NDVI Reflected	Removed from EE tower because most of the SRS NDVI sensors installed in the Delta have been drifting over the past few years
Net Radiometer
2013-11-25	1454	NR01	Moved	Net Radiometer	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	1454	NR01	Removed	Net Radiometer	Removed from the site due to the tower falling over in the wind on 2014-12-30. The pryanometers were partly submerged but it doesn't look like they leaked.
2015-01-20	1454	NR01	Installed	Net Radiometer	Reinstalled after being removed when the scaffolding fell over.
2021-07-21	121038	CNR4	Moved	none	Moved from West Pond to East End at the conclusion of the radiometer intercomparison at WP
2021-08-17	121038	CNR4	Moved		Moved from EE to MB after completion of radiometer intercomparison at EE
PAR Sensor
2013-11-25	110337	PQS 1	Moved	PAR Sensor Incoming	This sensor was moved from the DWR Corn construction tower to the new East End tower and installed in the incoming position because the cable of the incoming PAR sensor was cut.
2013-12-19	110340	PQS 1	Installed	PAR Sensor Incoming	Reinstalled in the upward facing position after repairing the cable from being sheared off in the folding boom.
2015-01-05	110337	PQS 1	Removed	PAR Sensor Incoming	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-05	110340	PQS 1	Removed	PAR Sensor Incoming	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	110337	PQS 1	Installed	PAR Sensor Reflected	Reinstalled after being removed when the scaffolding fell over. This sensor is pointing down and measuring PARout.
2015-01-20	110340	PQS 1	Installed	PAR Sensor Incoming	Reinstalled after being removed when the scaffolding fell over. This sensor is pointing up and measuring PARin.
2018-07-05	040411	PAR-LITE	Installed	PAR Sensor Diffuse	Installed with a rotating shadow band for diffuse PAR.
2019-07-25	110340	PQS 1	Removed	PAR Sensor Incoming	Removed from EE because it had been spiky in the last month. It was replaced sn 10162.
2019-07-25	10162	PAR-LITE	Installed	PAR Sensor Incoming	Installed at EE to replace sn 110340, which was removed for spiky behavior.
2021-03-30	140455	PQS 1	Installed	none	Installed in EE wetland to measure undercanopy PAR. This sensor is SE of the tower mounted on a horizontal boom. The sensor is sitting on top of a fallen bundle of dried reeds.
2021-03-30	990025	PAR-LITE	Installed	none	Installed in EE wetland to measure undercanopy PAR. This sensor is S of the tower mounted on a grounding rod. The sensor is sitting in an open patch a few cm above the water surface.
2021-03-30	990031	PAR-LITE	Installed	none	Installed in EE wetland to measure undercanopy PAR. This sensor is S of the tower mounted on a grounding rod. The sensor is sitting in a heterogeneous patch of dried reeds about 30cm above the water level
2021-11-18	040411	PAR-LITE	Removed	PAR Sensor Diffuse	Removed from the wooden 4x4 on the EE tower and brought back to the lab for inspection/repair. At least one of the cable splices is partly exposed and needs to be re-spliced.
2021-12-01	040411	PAR-LITE	Installed	PAR Sensor Diffuse	Installed at EE on the southeast corner of the scaffolding as part of the diffuse PAR set up.
2021-12-14	040411	PAR-LITE	Removed	PAR Sensor Diffuse	Removed dfPAR apparatus because the motor was not working. I brought it back to the lab to replace the motor.
2022-01-20	140455	PQS 1	Moved	PAR Sensor Diffuse	Moved locations at EE from undercanopy PAR 1 to dfPAR on top of the tower
2022-02-02	990031	PAR-LITE	Moved	PAR Sensor Undercanopy C	Removed from lower location south of the tower at East End. This sensor was disconnected from the data logger two weeks before. This sensor was moved to GT to replace the incoming PAR there that was having negative values at night.
2022-02-02	990025	PAR-LITE	Removed	PAR Sensor Undercanopy B	Removed from lower location south of the tower at East End. This sensor was disconnected from the data logger two weeks before
Precipitation
2013-11-25	50229-112	TR-525M	Moved	Precipitation	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	50229-112	TR-525M	Removed	Precipitation	Removed from the site due to the tower falling over in the wind on 2014-12-30. The tipping bucket was in the water and had a dent, but seems okay.
2015-01-20	50229-112	TR-525M	Installed	Precipitation	Reinstalled after being removed when the scaffolding fell over. Still needs mounting on the boardwalk railing.
2018-10-18	50229-112	TR-525M	Calibration	Precipitation	Got 94 of 100 tips - adjusted screws a total of 0.5 turns CW. 2018-10-28: Got 98 of 100 tips and adjusted set screws 0.5 turn CW. 2018-11-01: Got 93 of 100 tips - no adjustment and need to retest 2018-12-18: 98 of 100 tips - no adjustment.
2019-10-22	50229-112	TR-525M	Calibration	Precipitation	After cleaning the tipping bucket we connected it to a CR23x and dripped 475ml of water through the bucket which should result in 100tips. We got 96 tips – we did not adjust it.
2020-11-19	50229-112	TR-525M	Tested	Precipitation	After cleaning the tipping bucket we connected it to a CR23x and dripped 475ml of water through the bucket which should result in 100 tips. We got 104 tips and did not adjust it. Might test again.
2020-12-03	50229-112	TR-525M	Tested	Precipitation	Plugged tipping bucket into the calibration CR23x and dripped 475ml of water through the bucket (1/2 of the bottle at a time) which should result in 100 tips. Got 110 tips. Did not adjust - will retest with better water metering system.
2021-10-21	50229-112	TR-525M	Tested	Precipitation	We dripped 240ml of water through the bucket using a peristaltic pump powered with a lithium battery. This should result in 50 tips in about 20 minutes. We got 54 tips and adjusted its set screws 1.5 turns CCW (1/2 turn of both screws is a 2-3% adjustment).
RH & Temp
2013-11-25	G4540023	HMP60	Moved	RH & Temp	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-01-05	G4540023	HMP60	Removed	RH & Temp	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	G4540023	HMP60	Installed	RH & Temp	Reinstalled after being removed when the scaffolding fell over.
2017-12-18	G4540023	HMP60	Removed	RH & Temp	Removed from Eat End for a 24hour side-by-side comparison at Twitchell Alfalfa
2017-12-19	G4540023	HMP60	Removed	RH & Temp	Removed from the HMP inter-comparison at Twitchell Alfalfa and returned to East End
2019-01-24	G4540023	HMP60	Removed	RH & Temp	Brought back to the lab from EE for inspection b/c of data drops/spikes. It was replaced by HMP45 sn U3030046.
2019-01-24	U3030046	HMP45AC	Installed	RH & Temp	Installed at EE to replace G4540023, which was brought back to the lab for inspection.
2019-01-31	U3030046	HMP45AC	Removed	RH & Temp	Removed from EE b/c RH was not working (ranged only b/t 10 and 13%). It was replaced by HMP60 sn L1740420.
2019-01-31	L1740420	HMP60	Installed	RH & Temp	Installed at EE to replace HMP45 sn U3030046, which was removed for bad RH readings.
2024-08-29	L1740420	HMP60	Removed	RH & Temp	Removed from EE and brought back to the lab b/c the sensor is starting to die. It was replaced by Hygrovue sn E5905.
2024-08-29	E5905	HygroVUE10	Installed	RH & Temp	Installed at EE to replace the HMP60 sn L1740420 that was finally starting to die
Solar Controller
2013-11-25	11400073	PS-30M	Moved	Solar Controller	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
Solar Panel
2013-11-25	11ZV0M0830	KD140SX-UFBS	Moved	Solar Panel A	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2013-11-25	11ZV0M0859	KD140SX-UFBS	Moved	Solar Panel B	The DWR Corn / Construction tower was decommissioned and rechristened at its new permanent location at the Twitchell East End Wetland
2015-12-08	11ZV0M1127	KD140SX-UFBS	Installed	Solar Panel C	This solar panel was added to the existing two panels.
Spectrometer
2016-10-11	USB2G4461	USB2000-VIS-NIR	Calibration		Calibration Location: East End Last calibration: 2016-04-13 RSSI=82%, Optical RH=21% Ambient P=101.6kPa, Tair=21.1C zero air at 800psi, AMP CH4 4.03 at 1400 CH4 Zero Offset: 0.02ppm CH4 Span Offset: 0.01ppm Notes: Breezy
Water Level
2013-12-19	20010375	CS451	Installed	Water Level	Installed on the East End tower. From field note calculations, sensor was installed 82cm below ground level. Top of the pipe to ground = 53 cm Water level was at ground surface Well pressure: 1.17 psi ~ 82 cm
2014-04-03	20010375	CS451	Moved	Water Level	Moved up 93.6 cm (sensor changed from 2.06 psi to 0.73 psi)
2015-01-05	20010375	CS451	Removed	Water Level	Removed from the site due to the tower falling over in the wind on 2014-12-30. Likely undamaged.
2015-01-20	20010375	CS451	Installed	Water Level	Reinstalled after being removed when the scaffolding fell over. Installed at 88cm below ground level. Water level was 8cm agl.
2018-09-18	20010375	CS451	Moved	Water Level	Position adjusted when troubleshooting. From field notes: Top of pipe to sensor = 66 cm Top of pipe to water = 30 cm Sensor depth under water should be 66-30=36cm Sensor = 0.66psi ~ 46 cm
2020-07-21	20010375	CS451	Removed	Water Level	Removed from EE and brought back to the lab to repair a chewed section of the cable.
2020-08-05	70011229	CS451	Installed	Water Level	Installed at EE to replace sn 20010375, which was brought back to the lab for repair. From field note calculations, sensor was installed 22cm below ground level. Top of well to ground level= 41 cm Top of well to sensor = 63 cm Top of well to bottom of well inside pipe = 66 cm (dry at bottom of well)

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