Equipment and Calibration

Equipment Entry

Instrument:	Gas Analyzer
Manufacture:	Licor
Model No:	LI-7500A
Serial No:	75H-2418
Tag No:
Acquisition Date:	2022-08-16
Project:	Ameriflux
Location on 2024-01-23:	Returned,
Notes:	Received from Sebastian at Ameriflux for emergency replacement of head that died at GT. Came with box 1039, box brackets, head mount, IRGA cable and temp sensor.

Rec No.	Date	Loc From	Title	Loc To	Notes
6541	2024-01-23	Lab none	Returned	Returned none	Returned to Stephen Chan at LBL. Returned with AMP LI-7550 sn AIU-1039, a 7550 thermistor, IRGA cable, and IRGA mount.
6458	2023-11-02	Disposed none	Borrowed	Lab none	Borrowed from AMP for while our LI-7550 sn AIU-1866 is back at Licor for repairs. Came with AMP LI-7550 sn AIU-1039, a 7550 thermistor, IRGA cable, and IRGA mount.
6300	2023-06-13	Lab none	Returned	Disposed none	Returned to Andre Santos from Ameriflux. Returned with box AIU-1039, box brackets, head mount, IRGA cable and temp sensor.
6175	2023-01-19	Gilbert Tract Gas Analyzer CO2/H2O	Removed	Lab none	Removed from Gilbert Tract for calibration. Replaced by sn 75H-2667.
5945	2022-08-18	Lab none	Installed	Gilbert Tract Gas Analyzer CO2/H2O	Installed on the GT tower to replace the one that failed a few days ago and was removed.
5941	2022-08-17	Lab	Calibration	Lab	Last calibration: 2020-03-23 AGC=100.5 SDM=0 DAC1=- DAC2=- Ambient P=100.2kPa, Tair=24.2C, Tdew=13.6C Zero Air at 300psi, AMP CA04119 524.77 at 1400 Tdewspan=20.0 CO2 zero -> 0.9786 Offset: -0.7ppm CO2 span 1.0091 -> 1.0054 Offset: 2.63ppm H2O zero 0.8245 -> 0.8242 Offset: 0.9ppm H2O span 1.0166 -> 1.0292 Offset: -0.28ppm Notes: Borrowed from Ameriflux. Previous cal values retrieved from instrument. Seems the 7500s don't drift much and that our cal methods match whatever methods were used last time.