When: Date: 1/13/2008 , Day: 13 , Watch Time: 11:00 .
Where: Tonzi/Vaira Ranch
Who: Siyan
Weather: partially cloudy, nice cold, foggy on the road
Phenology: Looks wetter. Mr. Tonzi’s pond was half-filled. A lot of cow footprints were seen at Tonzi.
Summary

1. Instant readings from Data logger at Vaira were all zero!!! Met data weren’t downloaded to the PC after Day 10.
2. EC systems were working well at Tower.
3. There was a power problem at Floor. The regulator of power shut down the whole EC system. After I turned off the power and re-turned it on, the PC kept reboot itself all the time. Talked to Ted in the field on the phone and he suggested to take the PC back to the lab. (I have talked to Ted about the problem, and he is going to the field to fix the problem.)
4. Voltage meter of Vaira fence looks broken because the pointer was always on the far right side even though the switch was off.

Vaira_Grass Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 12.2 v; 9.1-15.5 amps; 3.4 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Time
Path/File name	D:\Data\V08_013 .flx D:\Data\VR08 .raw
	mean	std		mean	std
w	0.1	0.20	Ts	8.9	0.47
u	-0.37	0.39	H2O	1.33	0.02
v	0.65	0.60	CO2	2.43	0.012
			Tc	0.256	0.043

1. downloading data – Yes. However, instant readings from Data logger at Vaira were all zero!!! Met data weren’t downloaded to the PC after Day 10.
2. check the fans of air temp. and relative humidity sensors at Vaira. OK.
3. Check MD-9 system connections. OK.
4. Check levels of Radiation sensors, clear up surfaces. Yes.
5. Closed gate and set up fence. - Voltage meter of Vaira fence looks broken because the pointer was always on the far right side even though the switch was off.

Tonzi_Tower Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 11.8 v; 0.0 amps; 5.3 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Time
Path/File name	D:\Data\T08_013 .flx D:\Data\TW08 .raw
	mean	std		mean	std
w	0.43	0.409	Ts	13.39	0.42
u	0.02	0.548	H2O	2.3	0.01
v	1.64	0.56	CO2	2.17	0.02

1. downloading data Yes.
2. check the fans of air temp. and relative humidity sensors on the tower and the floor. Yes.
3. Check calibration cylinders;

CO₂ 400 psig; flow 20 psi. (Tank: 422.2 ppm)
N₂ 400 psig; flow 20 psi.
Manually calibrate Li-800. Following Ted’s instruction: H:\IoneSavanna_2004\Tower_2004\CO2Profile\LI800_Calibration_Procedure_2Nov04.txt
Is the pump running‌ Yes.
How to check the CO2 values‌ Click “Ports/Flags” button to see which ports or flags is setting high. Pressure should be less than ambient value. When Flag 8 is high, it may indicate that RRR’s battery is low.

1. close gate and set up fence. Yes.

Toniz_Floor Site

1. Fence and gate power: >12 v.
2. Panel and Batteries:

First time: 12.4 v; 15.6 amps; Lvd amps. The regulator of power shut down the whole EC system.
After I re-turned on the power, the PC kept reboot itself all the time.
Talked to Ted in the field on the phone and he suggested to take the PC back to the lab.

1. Close gate and set up fence. Yes.