Field Notes
<--2002-07-11 04:00:00 | 2002-07-19 09:00:00-->Other sites visited today: Vaira | Tonzi/Vaira
Tonzi: 2002-07-11 15:50:00 (DOY 192)
Author: Ted Hehn
Others: Liukang
Summary: Tower diagnostics after failure of tower flux system.
| Hehn arrives 12:30 partly cloudy and hot with light breeze -Liukang informs me of failure of tower flux system Begin tower diagnostics: -Pc without power - Sonic and licor without power - Regulator enclosure has strong odor of electrical fire --- solar regulator in LED sequential flash mode indicating one of the following conditions: 1. load short circuit 2. high temp disconnect 3. high voltage disconnect 4. initial battery connection Positive lead to regulator battery connection showing visible signs of being burned indicating excessive current draw. However voltage is still present on these leads. Powering down/up regulator returns regulator to seq. flash mode. Remove load output leads from regulator and regulator returns to normal functioning. Continuity test on load leads indicates continuity (short circuit condition). No other signs of burned wiring or excessive heat. Disconnect all instruments from power buss and check all power leads for continuity – all instruments showing discontinuity (normal condition). Disconnect all tower power buss junction connections up and down tower to isolate each individual section from the others and check each individual section for continuity. Section from 23x data logger/regulator enclosure power buss to sonic xlator enclosure power buss indicates continuity. This is a 20-22 gage wire (small). Replace with 16 gage wire and all systems return to operation. |
Field Data
No tank data
No TZ Well data found
No TZ Moisture Point data found
No VR Moisture Point data found
No TZ grass heigth found
No VR grass heigth found
No TZ Tree DBH found
Water Potential - mode: raw
| Time | Species | Tree | readings (bar) | |
|---|---|---|---|---|
| 2002-07-11 06:00:00 | OAK | 245 | -16 | -19.5 |
| 2002-07-11 06:00:00 | OAK | 248 | -21 | -17.5 |
| 2002-07-11 06:00:00 | OAK | 250 | -16.5 | -20 |
| 2002-07-11 06:00:00 | OAK | 252 | -17 | -19.5 |
| 2002-07-11 06:00:00 | OAK | 255 | -14.5 | -13 |
| 2002-07-11 06:00:00 | OAK | 71 | -12.5 | -11.5 |
| 2002-07-11 06:00:00 | OAK | 72 | -8 | -10 |
| 2002-07-11 06:00:00 | OAK | 76 | -15.5 | -14.5 |
| 2002-07-11 06:00:00 | OAK | 81 | -14.5 | -14 |
| 2002-07-11 06:00:00 | PINE | 78 | -11 | -12.5 |
No TZ Grass Biomass data found
No TZ OakLeaves Biomass data found
No TZ PineNeedles Biomass data found
0 photos found
16 sets found
No data found for TZ_Fenergy.
11 TZ_tmet graphs found
No data found for TZ_soilco2.
Can't check TZ_mixed
3 TZ_mixed graphs found
No data found for TZ_fflux.
8 TZ_fmet graphs found
No data found for TZ_tram.
No data found for TZ_co2prof.
No data found for TZ_irt.
No data found for TZ_windprof.
No data found for TZ_tflux.
2 TZ_sm graphs found
Can't check TZ_met
1 TZ_met graphs found
Can't check TZVR_mixed
No data found for TZ_osu.
No data found for TZ_fd.
Tonzi Z-cam data