Field Notes

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Other sites visited today: Hill Slough | East End | West Pond | Sherman Wetland
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Mayberry: 2021-05-26 16:15:00 (DOY 146)
Author: Daphne Szutu
Others: Dennis, Robert

Summary: Regular data collection/cleaning, swapped 7500 for calibration, calibrated 7700, upgraded 7550 firmware, Rnet sensor surface looks damaged

2021-05-26
Mayberry

Dennis, Robert, and I arrived at 16:15 PDT. It was a breezy, gusty, sunny day. The water level is still going up and the staff gauge read 85cm. We damaged one of the plank boardwalks when Dennis and Robert dropped the big gas tank on it.

I collected met, camera, pi cam, and USB GHG data. Robert cleaned flux and rad sensors. Robert noticed that the Rnet water sensor had a lot of bird crap on it, and after he cleaned it he noticed the sensor surface had a lot of divots in it, so we should double check the data from this sensor. The wash reservoir was 90% full; we refilled.

We calibrated LI-7700 sn TG1-0223 with 2 AMP tanks. The Zero cal gas was a baby tank of N2 that Sebastien B. had dropped off to us in the lab this morning. The Span cal gas is also an AMP tank with CH4 concentration of 4.223 ppm. The zero and span offsets were small. After the calibration, we reattached the 7700 spray nozzle.

We also swapped the LI-7500 for calibration: sn 0418 came off and sn 0042 went on the tower. I uploaded a new configuration file, updated the pressure coefficients, and reset the box.

I upgraded the 7550 sn AIU-1285 firmware from 8.5.0 to 8.8.32. After the upgrade, I checked that the GHG columns looked good, the clock was correct, and the USB was logging.

LI-7500 readings (sn 0418 --> sn 0042 --> sn 0042 with upgraded 7550 firmware):
CO2 407ppm --> 428 --> 426
H2O 520ppm --> 547 --> 575
T 28.6C --> 27.5 --> 27.1
P 101.2kPa --> 99.3 --> 99.3
SS 98--> 98 --> 98
LI7700 readings:
CH4 1.96ppm
RSSI 56--> 77 after cleaning

We left at 17:20 PDT.

1 photos found

20210526MB_BrokenCrossbrace.jpg ( 2021-05-26 17:16:05 ) Full size: 1440x1920
Boardwalk crossbrace broke when Dennis and Robert dropped a big gas tank on it