Field Notes

<--2015-06-25 12:30:00 | 2015-07-22 09:20:00-->
Other sites visited today: Twitchell Rice | East End | West Pond | Twitchell Alfalfa

Mayberry: 2015-07-09 12:45:00 (DOY 190)
Author: Cove Sturtevant
Others: Sara, Miguel

Summary: Water level high. Data download. Adjusted 7700 wash settings. Top FR CO2 probe needs testing.

Mayberry
2015-07-09

We arrived at about 12:45 PDT. Breezy, overcast, and warm. The water level was high. We cleaned all sensors and downloaded data.

Replaced the copper mesh on the middle miniDOT. The gauge on the copper is a bit thin, which reduces the rigidness of the mesh and leaves the edges bending upwards. Itâ€™s fine, but a thicker gauge would make it easier to handle the sensor without scraping up your hand.
Attempted re-install of the top Forerunner CO2 probe sn GP20140011 but it was reading close to 2% in ambient air (temp was fine) so we pulled it back in for testing.

The RSSI for the 7700 was < 5% upon arrival, though the reservoir was Â¾ full. When I manually tested it, there were no visible leaks in the system but I had to wait about 10 seconds for the water to reach the sensor. I increased both the spray and spin time to 20 seconds.

Readings
CO2: 384 ppm (395 after cleaning)
H2O: 762 mmol m-3 (710 after cleaning)
signal strength = 94.37% (96.2% after cleaning)
p = 101.1 kPa
t: 20.6 Â°C
sos = 345.2 m s-1
CH4: 1.8 ppm (1.95 ppm after cleaning)
RSSI: 4.6% (68% after cleaning)
Topped off reservoir.

0 photos found

11 sets found

7 MB_flux graphs found