Field Notes
<--2014-09-08 13:00:00 | 2014-09-18 12:00:00-->Other sites visited today: Twitchell Alfalfa | West Pond | East End | Mayberry
Twitchell Rice: 2014-09-10 10:00:00 (DOY 253)
Author: Joe Verfaillie
Others: Sara
Summary: Upgraded solar power batteries and charge controller, calibrated 7700, removed DO sensor
| Twitchell 2014-09-10 I arrived about 10:00 with Sara. It was warm, sunny and still with almost no wind at all. The rice looks good, but still drying. They are harvesting safflower. We put in some new batteries and a new solar controller. I had two older batteries in the lab and bought two more. We moved the three old group 8D out of the way and installed the four group 27 batteries. The old 8Ds didn’t drop voltage immediately but might later. We also installed a new solar charger under the solar panels. The big wood box now contains nothing important. We ran a new wire for the camera from the new solar charger. I adjusted the camera mount to match the historic view better. We calibrated the 7700. The offsets seemed higher than usual around 70ppb. But otherwise the calibration went well. The 7700 read: 2.2ppm, 42RSSI, 69 after cleaning and before cal. We removed the DO sensor sn DO-08 as it was high and dry. The tipping bucket was full of grass seed. I cleaned it out and may have tipped it a couple of times. |
2 photos found
20140910TW_NewBatteriesCharger.jpg ( 2014-09-10 11:10:41 ) Full size: 1920x1440
view of field site
TW_autocam_20140910_0945.jpg ( 2014-09-10 09:45:03 ) Full size: 1920x1440
Joe and Sara 7700 calibration
6 sets found
12 TW_met graphs found
5 TW_flux graphs found
Can't check TWSI_mixed
Can't check SIMBTWEE_met
1 TW_cam graphs found
Can't check TATWBABCSB_cam