Field Notes

Twitchell Rice: 2013-12-19 11:00:00 (DOY 353)
Author: Joe Verfaillie
Others: Patty

Summary: Replaced power line to tower, solar controller flakey, re-installed DO, fixed HMP45 fan, pulled and reset SHF1

Twitchell Rice
2013-12-19

I arrived about 11:00 with Patty. It was mostly sunny and mild with a strong wind blowing from the North. The field remains flooded.

I was worried that the power line to the tower was too small. It was dropping about 0.3V from the solar controller to the tower. I replaced it with a heavier line. In the transition the solar controller was slow to function. Initially I could not get the load to come back on, but then the solar connection didnâ€™t seem to be accepting power. After letting the controller sit all connected for a little bit the solar connection started working finally.

At the tower the 7500 read: 395.6ppm CO2, 278mmol/m3 H2O, 88.9% SS, 13.19C, 101.42kPa
The 7700 read: 29% RSSI, 1.90ppm CH4. After cleaning the RSSI was 60%

The 7700 internal optics RH was 16% good until 30%. The wash reservoir was full.

We reinstalled the DO sensor with fresh solution. SHF #1 was pulled out in the process and was reinserted in the soil.

We swapped the fan on the HMP45.

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6 sets found

12 TW_met graphs found