Field Notes
<--2018-04-17 10:00:00 | 2018-04-24 10:30:00-->Other sites visited today: Sherman Wetland | Mayberry | Bouldin Corn | Bouldin Alfalfa | Twitchell Alfalfa | East End | West Pond
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East Pond: 2018-04-19 11:00:00 (DOY 109)
Author: Joe Verfaillie
Others: Daphne, Sam
Summary: Continue setting up the site, swapped 7550 box, moved eddy sensors, plugged in sonic, fixed loose wire on HMP60, leveled scaffolding
| East Pond 2018-04-19 Sam and Daphne dropped me off at East Pond at about 11am then went to do the other Twitchell sites. I powered down the tower while I swapped out the two green 12 gauge wires from the batteries to the charge controllers with 10 gauge black and white wires. At the tower I leveled the scaffolding by adjusting the foot jacks. We need to check the tie downs to the fence post didn't become loose when I adjusted the scaffolding feet. Then I added split loom to the TC wires and the well cable. The split loom only goes from the scaffolding to just into the water. Hopefully this will prevent chewing by whatever seems to chew on wires near the surface. I added some horizontal cross braces to the top level of scaffolding to act as railings. Then I remounted and lowered the eddy sensors. The swivel fittings seemed a little loose at the swivel and the boxes mounted below prevented the post from sliding any lower. I moved the post about 20cm in from the corner and use cross over fittings. Now the post can slide down past the boxes below. We still need to make height and orientation measurements. I had to cut a notch in the boardwalk to fit the post. I added some bolts to the scaffolding joints but more are still needed. I also replaced the pin screw for the radiometer boom with a better one. I swapped out the LI-7550 box, sn AIU-0666 came off and sn AIU-0650 went on. This was because 666 doesn’t have a pressure port plus some other issues and we were going to use it in the lab for calibrations. However 650 also has a broken pressure power. I also had to enter all the configurations for the 650 box. Looks like it was last used at Vaira. After the swap The 7500 read: 402ppm CO2, 400mmol/m3 H2O, 20.1C, 102.1kPa, 97.7SS The 7700 read: 1.98ppm CH4, 63.0RSSI The sonic was not connected to power, so no wind data until now. We left at about 1:20pm. |
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5 sets found
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9 EP_met graphs found
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