Equipment and Calibration History

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Ser No.DateLoc FromTitleLoc ToNotes
LI-7550 AIU-1866 2018-03-06 Tonzi-Tower Interface LI-7550 Upgrade Tonzi-Tower Interface LI-7550 Downgraded from embedded software version 8.7.5 to version 8.5.0 to standardize our systems. We had to downgrade other interfaces to 8.5.0 to solve the data-header mismatch we had with version 8.7.5.
LI-7500A 75H-2182 2018-03-06 Lab none Installed Vaira Gas Analyzer CO2/H2O Installed at Vaira to replace sn 0065.
LI-7500A 0065 2018-03-06 Vaira Gas Analyzer CO2/H2O Removed Lab none Removed for calibration and replaced by sn 75H-2182.
LI-7550 AIU-1870 2018-03-06 Vaira Interface LI-7550 Upgrade Vaira Interface LI-7550 Downgraded from embedded software version 8.7.5 to version 8.5.0 so that the interface version is consistent across the lab. We had to downgrade other interfaces to 8.5.0 to solve the data-header mismatch we had with version 8.7.5.
eosFD FD20160001 2018-03-21 Factory Returned Lab none Returned from Eosense after a long, long time. Last time it was immediately returned to them after coming back from having the pump replaced because the IRGA seemed to be dead.
LI-7500A 75H-2150 2018-03-19 Lab none Installed Mayberry Gas Analyzer CO2/H2O Installed at MB replacing SN 0418 for calibration.
LI-7500A 0418 2018-03-19 Mayberry Gas Analyzer CO2/H2O Removed Lab none Removed from MB for calibration, replaced with SN 75H-2150.
LI-7500A 75H-2176 2018-03-19 Lab none Installed Sherman Wetland Gas Analyzer CO2/H2O Installed on SW to replace SN 0073 for calibration.
LI-7500A 0073 2018-03-19 Sherman Wetland Gas Analyzer CO2/H2O Removed Lab none Removed from SW for calibration, replaced by SN 75H-2176.
CM11 996985 2018-03-16 Lab none Repair Lab none Sensor had old and cracked cable. Replaced with 10m cable. Red connected to red, blue (sensor) connected to black (cable), bare to bare.
TE525MM 49187-109 2017-05-10 Lab none Installed Twitchell Alfalfa Precipitation Installed at TA to the same pole as the soilco2 datalogger enclosure and wired it to the met CR1000. We realized this wiring under-measured precipitation and re-wired to a CR10x on 2018-02-13.
HMP45AC U3030046 2018-03-12 Lab none Tested Lab none Tested in the lab and numbers seems reasonable.
CNR1 990181 2017-05-25 Bouldin Corn Net Radiometer 4-way Removed Lab none Removed from BC tower because comparison is complete
LI-7550 AIU-0666 2018-03-09 Lab none Maintenance Lab none Cleaned out the box of bug detritus and replaced the gasket on the front lid. This box is missing the pressure port (the hole is covered by electrical tape) and the reset button is missing, so this box should stay in the lab for now for calibration purposes.
GP-001ex GP2013ex02 2018-03-07 Twitchell Alfalfa Removed Lab none Removed from the -16cm location at Twitchell Alfalfa because the readings have been funky for a while. Probably will be replaced at a later date.
GP-001 GP20140026 2018-03-07 Twitchell Alfalfa Removed Lab none Removed from the -8cm location at Twitchell Alfalfa because the readings have been funky for a while. Probably will be replaced at a later date.
GP-001 GP20140084 2018-03-07 Twitchell Alfalfa Removed Lab none Removed from the -2cm location at Twitchell Alfalfa because the readings have been funky for a while. Probably will be replaced at a later date.
BB-Fab BB-TA 2018-03-07 Twitchell Alfalfa Maintenance Twitchell Alfalfa The battery bank at TA was rewired from to pairs (24V) to four in parallel (12V).
LI-7500A 75H-2150 2018-03-05 Lab none Calibration Lab none Last calibration: 2018-02-20
AGC=97 SDM=0 DAC1=0 DAC2=0
Ambient P=101.2kPa, Tair=25.7C, Tdew=1.7C
Zero Air at 100psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.902 -> .9023 Offset: 1.32ppm
CO2 span 1.007 -> 1.0093 Offset: -1.21ppm
H2O zero 0.866 -> .9655 Offset: -3.3ppm
H2O span 1.009 -> 1.0096 Offset: -.01ppm
Notes:
LI-7500A 75H-2176 2018-03-05 Lab none Calibration Lab none Last calibration: 2018-02-05
AGC=101.2 SDM=0 DAC1=0 DAC2=0
Ambient P=101.2kPa, Tair=23.3C, Tdew=4.2C
Zero Air at 100psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.8674 -> .8679 Offset: 2.12ppm
CO2 span 1.0032 -> 1.0057 Offset: -1.52ppm
H2O zero 0.851 -> .8486 Offset: -15.8ppm
H2O span 1.0142 -> .9112 Offset: 2.31ppm
Notes: First calib in the lab since Licor factory repair/calib. The H2O zero and span have large offsets because the Licor factory H2O calibration station failed. Our dewpoint generator results matched with Patty's dewpoint generator.
PRB-K Type #8 000000574632 2017-12-14 Tonzi Removed Lab none Removed from the location inside the soil co2 profile fence. This probe has been giving bad readings for a while and its lowest pin is broken off.
Mark I A000591 2018-02-28 Lab none Installed Bouldin Alfalfa Weather Station A Installed on the top, south rail of the scaffolding, between the radiation boom and the precip bucket. I leveled the sensor, but it was not pointing N because I prioritized aiming the downward-facing sensors towards the alfalfa. I also set up the Arable’s auxillary solar panel between the Arable and the precip bucket.
LI-7500A 0042 2018-03-05 Lab none Calibration Lab none Last calibration: 2017-05-05
AGC=98 SDM=0 DAC1=0 DAC2=0
Ambient P=101.4kPa, Tair=25.5C, Tdew=2.0C
Zero Air at 150psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.9847 -> .9485 Offset: 1.08ppm
CO2 span 1.0244 -> 1.0124 Offset: -1.35ppm
H2O zero 0.8434 -> .843 Offset: .7ppm
H2O span 1.1404 -> 1.0225 Offset: -.11ppm
Notes:
LI-7500A 75H-2182 2018-03-05 Lab none Calibration Lab none Last calibration: 2018-02-20
AGC=86.9 SDM=0 DAC1=0 DAC2=0
Ambient P=101.4kPa, Tair=25.1C, Tdew=1.2C
Zero Air at 150psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.8844 -> .8844 Offset: -0.07ppm
CO2 span 1.0215 -> 1.0217 Offset: -.11ppm
H2O zero 0.8446 -> .8453 Offset: 3.8ppm
H2O span 1.0038 -> 1.0169 Offset: -.26ppm
Notes: H2O span set with our dewpoint generator, which agrees with Patty's brand-new dewpoint generator
LI-7500A 0041 2018-03-05 Lab none Calibration Lab none Last calibration: 2018-02-20
AGC=99 SDM=0 DAC1=0 DAC2=0
Ambient P=101.5kPa, Tair=23.4C, Tdew=10.6C
Zero Air at 150psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.9971 -> .9972 Offset: .25ppm
CO2 span 1.0195 -> 1.0196 Offset: -1.07ppm
H2O zero 0.8187 -> .8194 Offset: 4.5ppm
H2O span 1.0217 -> 1.0267 Offset: -.1ppm
Notes: H2O span checked against our dewpoint generator and Patty's dewpoint generator
AM16/32B 26950 2018-02-28 Lab none Installed Mayberry Multiplexer Met This is a brand new mux. It was Installed on the Mayberry tower to replace the old one that seems to be causing spikes and drop out on the radiation channels.
AM16/32A 1236 2018-02-28 Mayberry Multiplexer Met Removed Lab none Removed from Mayberry due to spikes and drops on radiation channels. This is an old mux and may be wearing out.
CR1000 66251 2017-04-26 Lab none Installed Bouldin Corn Data Logger Met Installed on the Bouldin Corn Tower to collect the met data with the initial set up of the site.
SRS-Pi PRI 897103002 2017-04-26 Lab none Installed Bouldin Corn Narrow Band PRI Reflected Installed on the Bouldin Corn Tower with the initial set up of the site. This sensor is in the reflected position using SDI-12 address F
HMP45AC U3030046 2018-03-05 Lab none Maintenance Lab none All three o-rings were replaced. Should be good to go.
HFP01 10809 2018-02-27 Lab none Repair Lab none Re-stripped cable so the correct ground wire was showing. The brown wire had been used as the ground, but that is not connected to anything. I fixed the cable so the three exposed wires are white (sig +), green (sig -) and bare (ground).
HFP01SC 00245 2018-02-27 Lab none Repair Lab none I soldered on a cable and reinforced the cable-sensor connection with silicone. This sensor tested sufficiently against sn 00244 and sn 10809.
HFP01SC 00244 2018-02-27 Lab none Repair Lab none I soldered on a cable and reinforced the cable-sensor connection with silicone. This sensor tested sufficiently against sn 00245 and sn 10809.
LI-820 CGA-556 2018-02-21 Lab none Installed Tonzi Installed in the old CO2 profile system on the Tower for comparison of the new GMP343 profile.
LI-7500A 0041 2018-02-20 Lab none Calibration Lab none 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.
LI-7500A 75H-2182 2018-02-20 Lab none Calibration Lab none Last calibration: 2017-08-16
AGC=87 SDM=0 DAC1=0 DAC2=0
Ambient P=101.1kPa, Tair=23.3C, Tdew=-.8C
Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.8832 -> .8844 Offset: 5.24ppm
CO2 span 1.0123 -> 1.0215 Offset: -4.81ppm
H2O zero 0.8436 -> .8446 Offset: 6.7ppm
H2O span 1.0038 -> 1.0038 Offset: 0ppm
Notes: I didn't do a new H2O span because the dewpoint measurement was hovering around 2C, when the dewpoint generator was set to 16.00C. There might be an issue with the dewpoint generator.
LI-7500A 75H-2150 2018-02-20 Lab none Calibration Lab none Last calibration: 2017-10-11
AGC=96.9 SDM=0 DAC1=0 DAC2=0
Ambient P=101.2kPa, Tair=24.4C, Tdew=0.15C
Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.9018 -> .902 Offset: .58ppm
CO2 span 1.007 -> 1.007 Offset: .83ppm
H2O zero 0.8649 -> .866 Offset: 7.1ppm
H2O span 1.009 -> 1.009 Offset: 0ppm
Notes: I didn't span the H2O because the sensor's dewpoint measurement decreased from 10 to 4.3 after 50 minutes. It didn't make sense for the H2O span to change that much. There might be an issue with the dewpoint generator.
LI-7500A 75H-2176 2018-02-05 Lab none Calibration Lab none Last calibration: 2017-11-09
AGC=0 SDM=0 DAC1=0 DAC2=0
Ambient P=0kPa, Tair=0C, Tdew=0C
Licor Factory at 0psi, Licor Factory 750 at 0 Tdewspan=12
CO2 zero 0.869 -> .8674 Offset: 0ppm
CO2 span 1.0225 -> 1.0032 Offset: 0ppm
H2O zero 0.857 -> .8510 Offset: 0ppm
H2O span 1.0047 -> 1.0142 Offset: 0ppm
Notes: Zero/Span set on 06 Feb 2018 at Li-cor Factory. CX=40242.3, WX=40527.3
LI-7500A 75H-2176 2018-02-05 Factory Calibration Factory Sensor calibrated at the Li-cor factory.
CO2 Calibration Values
A= 1.58409E2
B= -1.53312E4
C= 6.48285E7
D= -2.17327E10
E= 2.80839E12
XS= 0.0004
Z= -1.4E-3
SD1= -0.0085
SD2= -0.0892
SD3= 2.0680
H2O Calibration Values
A= 5.83891E3
B= 4.03548E6
C= -9.20453E6
XS= -0.0013
Z= 2.1E-2
SD1= 0.0484
SD2= 1.3610
SD3= 2.3810
Signal Strength
B= 2.158
C= 4.122
LI-7500A 75H-2176 2018-02-20 Factory Returned Lab none Sensor received from Licor: "Inspected the unit and found the chopper motor defective and the head bottom corroded. Replaced defective parts, subjected the unit to environmental tests and calibrated." It was sent with a new calibration certificate (05 Feb 2018).
PTB110 H0160093 2018-02-15 Lab none Tested Lab none The sensor tested successfully with a sample CR1000 program sent from Campbell. The sensor works as a single-ended measurement, but not as a differential measurement (I'm not sure why). I had only tested as a differential measurement previously.
CTD-10 1260403156 2018-02-06 Lab none Maintenance Lab none Extended the cable and swapped data and power colors so that white is wired to the data port and red is wired to the 12V port.
Decagon colors --> Extension colors --> datalogger
Red --> White --> Data
White --> Red --> 12V
Black --> Black --> G
Bare --> Green --> AG
CR10X 48042 2018-02-13 Lab none Installed Twitchell Alfalfa Data Logger Diffuse PAR Installed in the met logger box to run the diffuse PAR RSB, fixing problem with the ppt not being recorded properly in the fast cycle on the CR1000.
2300-000 2300565 2017-03-29 Lab none Installed Mayberry Fluorometer Installed at MB on the water sensor boom. It is at ?? depth below the water surface, about level with the top miniDOT DO and eosense CO2 sensors.
CR6 2113 2018-02-07 Lab none Installed Tonzi Installed on Tonzi Tower for the Vaisala GMP CO2 profile.
CTD-10 1260403156 2018-02-07 Lab none Installed Tonzi Installed in the well near the Floor tower. The sensor is 11.1m below the top of the white pipe. It is connected to the CR200.
GMP343 N2220008 2018-02-07 Lab none Installed Tonzi Installed at the top location on the Tonzi Tower in the new Vaisala co2 Profile.
AM16/32 5609 2012-02-16 Lab none Installed Vaira Installed at Vaira with the new soil CO2 system. The system is not running yet because we need longer cables for the Vaisala co2 probes.
CR10X 20139 2012-02-16 Lab none Installed Vaira Installed at Vaira with the new soil CO2 system. The system is not running yet because we need longer cables for the Vaisala co2 probes.
HFP01 10822 2018-01-31 Lab none Installed East End Heat Flux Plate B Installed at EE to right of rad boom in vegetation.
HFP01 001604 2018-01-31 Lab none Installed East End Heat Flux Plate A Installed at EE in open patch left of rad boom.
HFP01SC 00244 2018-01-31 East End Heat Flux Plate A Removed Lab none 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.
HMP60 G4540021 2018-01-31 Twitchell Alfalfa 0 Removed Lab none This golden HMP60 sensor was brought back from TA to the lab at the conclusion of our HMP comparison.
LI-7550 AIU-1570 2018-01-31 Lab none Installed West Pond Interface LI-7550 Installed at WP to replace AIU-0666 that was removed to fix door gasket, pressure port, circuit board cover.
LI-7550 AIU-0666 2018-01-31 West Pond Interface LI-7550 Removed Lab none Brought back to the lab for some TLC. It was replaced by AIU-1570.
CR6 2113 2018-02-01 Lab none Upgrade Lab none Upgraded OS from CR6.Std.03 to CR6.Std.07.02. The older OS has a known issue where the CR6 is unresponsive until the internal lithium battery is removed and reinstalled. After upgrading the OS, I used the "Network Services" tab to enable FTP with the username tower and the usual password.
CR6 2115 2018-02-01 Lab none Upgrade Lab none Upgraded OS from CR6.Std.03 to CR6.Std.07.02. The older OS has a known issue where the CR6 is unresponsive until the internal lithium battery is removed and reinstalled. This new O.S. CR6.Std.07.02 requires updating your computer USB drivers using Device Config Utility 2.16 (or newer). I updated Device Config Utility on my computer from version 2.10 to 2.16. In the "Send OS" tab in Device Config Utility, the first step provides a link to update USB drivers. After upgrading the OS, I used the "Network Services" tab to enable FTP with the username tower and the usual password.
CR6 2114 2018-01-31 Factory Returned Lab none Returned from Campbell where it was evaluated, updated and returned free of charge.
CR6 2114 2018-01-22 Factory Maintenance Factory Campbell says: Tested unit on bench, unit functioned upon receipt. No problems found, but unit is running OS Rev3. This Rev is suspected to cause random freezes that require disconnection of the lithium battery. The issue has been resolved in the latest CR6 OSes. Updated the logger to latest Rev 7.02. Performed calibration, tested unit in the environmental chamber, and performed final bench test. Replaced the internal lithium battery and included a new USB cable.
HMP45AC U3030046 2018-01-30 Lab none Notes Lab none This HMP45 needs 3 o-rings replaced before field deployment.
PS-30M 04350908 2018-01-30 Lab none Loaned Loaned Cleaned up and loaned to Patty for her Eden Landing tower.
LI-7550 AIU-1570 2018-01-29 Lab none Upgrade Lab none Downgraded from embedded Licor software v8.7.5 to 8.5.0. Version 8.7.5 was causing issues with header/data mismatch. I checked 7550 time and time zone and CO2 and CH4 logging config.
LI-7500A 0035 2018-01-16 Lab none Installed Bouldin Corn Gas Analyzer CO2/H2O Installed at BC to replace sn 75H-2176 (had PLL error)
LI-7550 AIU-0666 2018-01-16 West Pond Interface LI-7550 Upgrade West Pond Interface LI-7550 Downgraded embedded Licor software from v8.7.5 to 8.5.0 because 8.7.5 caused mismatch problems between data columns and headers
LI-7500A 75H-2180 2018-01-16 Lab none Installed West Pond Gas Analyzer CO2/H2O Installed at WP to replace sn 75H-2150.
LI-7500A 75H-2150 2018-01-16 West Pond Gas Analyzer CO2/H2O Removed Lab none Removed from WP and brought back to the lab for calibration. it was replaced by sn 75H-2180.
KD140SX-UFBS 11ZV0M0835 2018-01-23 Lab none Installed Mayberry Installed at Mayberry to supply extra winter power.
KD140SX-UFBS 11ZV0M0856 2018-01-23 Lab none Installed Mayberry Installed at Mayberry to supply extra winter power.
LI-7500A 75H-2176 2018-01-19 Lab none Repair Factory This 7500 head has a bad chopper (PLL error). It was sent to Licor on RMA 00205846 for repair and recalibration.
CR6 2114 2018-01-19 Lab none Shipped Factory This CR6 became unresponsive for no know reason - only a green light on the RJ45 jack. It was sent to Campbell on RMA 27680 for evaluation and repair.
CR6 2114 2018-01-15 Lab none Damaged Lab none I tried to install this CR6 at Tonzi for the new co2 profile on the Tower but it was non-functional. It tested fine in the lab this morning, but was a brick in the field. The green light on the RJ45 jack comes on but no other indication that it has power.
eosFD 20160003 2018-01-15 Tonzi Removed Lab none Removed from the soil co2 profile near Tree 1 for return to Eosense.
HMP60 L2310711 2018-01-15 Lab none Installed Tonzi Insalled by a box just below the 3rd lowest location of the tower co2 profile. This sensor will be used to give real time air temperature to the GMP343s.
PTB101B B0310006 2018-01-15 Lab none Installed Tonzi Installed in a box just below the 3rd lowest location of the tower co2 profile. This sensor will be used to give real time pressure to the GMP343s.
GMP343 N2210009 2018-01-15 Lab none Installed Tonzi Installed at the 3rd lowest location in the tower co2 profile - not running yet due to data logger failure.
GMP343 N2210010 2018-01-15 Lab none Installed Tonzi Installed at the 2nd lowest location in the tower co2 profile - not running yet due to data logger failure.
GMP343 N2220007 2018-01-15 Lab none Installed Tonzi Installed at the lowest location in the tower co2 profile - not running yet due to data logger failure.
eosFD 20160004 2017-10-25 Lab none Installed Vaira Forced Diffusion North Installed near the North soil co2 profile at Vaira. This one wouldn't start because it got too hot in the sun last time.
eosFD 20160006 2018-01-15 Vaira Forced Diffusion East Removed Lab none Removed from near the East soil co2 profile for return to Eosense
eosFD 20160005 2018-01-15 Vaira Forced Diffusion West Removed Lab none Removed from near the West soil co2 profile for return to Eosense
eosFD 20160004 2018-01-15 Vaira Forced Diffusion North Removed Lab none Removed from near the North soil co2 profile for return to Eosense
LI-7500A 0035 2018-01-12 Lab none Calibration Lab none Last calibration: 2017-09-05
AGC=98.9 SDM=0 DAC1=0 DAC2=0
Ambient P=101.5kPa, Tair=20.5C, Tdew=10.2C
Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.9373 -> .9378 Offset: 1.97ppm
CO2 span 1.0084 -> 1.0288 Offset: -10.27ppm
H2O zero 0.8976 -> .8978 Offset: 1.3ppm
H2O span 1.0141 -> 1.0296 Offset: -.31ppm
Notes:
HMP60 G4540021 2018-01-11 Lab none Installed Twitchell Alfalfa 0 Installed on Twitchell Alfalfa for another comparison. Last time the TA HMP60 had spiders in it and a slow fan.
AM16/32A 1236 2018-01-11 Lab none Installed Mayberry Multiplexer Met Installed on the Mayberry CR1000 met data logger to replace the existing AM16/32. There have been spikes in the data from the sensors on the existing multiplexer.
AM16/32A 1430 2018-01-11 Mayberry Multiplexer Met Removed Lab none Removed from the Mayberry Tower where is was on the CR1000 met data logger. It was removed due to spikes in mostly the radiometer channels.
BB-Fab BB-MB 2018-01-11 Mayberry Upgrade Mayberry Six flooded Super Start batteries with 07/2010 stickers were removed due to nightly low voltage power losses. These were replaced by five Outback AMG batteries from 11/2015 last used for the Temporary Towers at East End.
LI-7700 TG1-0224 2018-01-12 Lab none Adjusted Lab none This 7700 has an unlocked reference signal (the reference and signal waveforms were not synced). I talked with James at Licor and changed the Laser Start Temp from 29.8 to 25.5 in the factory settings (Help > About > Factory). To find the new start temperature, I did a Wide Scan (Help > About > Wide Scan > Start), which goes through temperature 0-50 deg C. There is a graph and table of results, where you can pinpoint the reference lock temperature. During the Wide Scan, some of the factory settings changed, so I reset those (changed Delta 1 from 100 back to 41). Licor has the original factory settings on file.
PS-30M 04350908 2018-01-11 Mayberry Removed Lab none Removed from the Mayberry solar system. This controller was full of dead ants and had some discoloring on the circuit board.
AM16-32A 1238 2018-01-10 Lab none Tested Lab none This mux works in 4x16 mode only.
LI-7500A 75H-2180 2018-01-10 Lab none Calibration Lab none Last calibration: 2017-08-16
AGC=97.8 SDM=0 DAC1=0 DAC2=0
Ambient P=101.1kPa, Tair=17.4C, Tdew=10.6C
Zero Air at 250psi, LBL Air 408.97 at 1700 Tdewspan=16.00
CO2 zero 0.9129 -> 0.9147 Offset: 7.92ppm
CO2 span 1.0145 -> 1.0362 Offset: -10.74ppm
H2O zero 0.8871 -> 0.8864 Offset: -4.2ppm
H2O span 1.0164 -> 1.0168 Offset: -0.02ppm
Notes:
LI-7700 TG1-0224 2018-01-10 Lab none Adjusted Lab none Checked the sensor in the lab, and the temperature reading was fine. However, there was an error "Reference signal is UNLOCKED," and CH4 was reading ~0.05 umol/mol. The diagnostics tab showed that the signal and reference waveforms were not synced. I changed the temperature control to manual, adjusted the laser temperature from 30.6 to 26.0 so that the waveforms were synced, and changed the temperature control back to automatic.
LI-7500A 75H-2176 2018-01-04 Bouldin Corn Gas Analyzer CO2/H2O Removed Lab none Removed from tower because of PLL error (did not hear sensor fan spinning)
LI-7500A 75H-2667 2017-12-19 Lab none Installed Bouldin Alfalfa Gas Analyzer CO2/H2O Installed on Bouldin Alfalfa to replace sn 0042 for calibration
LI-7500A 0042 2017-12-19 Bouldin Alfalfa Gas Analyzer CO2/H2O Removed Lab Gas Analyzer CO2/H2O Removed from Bouldin Alfalfa for calibration. Replaced by sn 75H-2667.
HMP45AC T1250012 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs
HMP45AC U3030046 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs
HMP60 L2310711 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs
HMP45AC T2130005 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs
HMP45AC U3030041 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs
HMP45AC W0730036 2017-12-18 Lab none Installed Twitchell Alfalfa Installed at Twitchell Alfalfa for an inter-comparison of HMPs