Field notes

Alfacada: 2025-05-15, 6:54 UTC (DOY 135)

Date & Time

15/05/25

Author

Ariane Arias

Other participants

Yinghuan Qin

Field report

Weather: High clouds with a moderate breeze, it looks like they will gradually disappear throughout the morning

We arribed to the site at 6.54h UTC. The wash reservoir was 30% full, and we refilled it. While downloading the data, I realized we were lacking the data stream from the precipitation bucket. It hadn’t been programmed in CRBasic. Programmed it in the field, will check next time how the data looks.

During installation of the tower in April, we noticed that the outgoing PAR was giving negative readings when it shouldn’t. We verified the wiring and confirmed it was correct, so we suspect the manufacturer may have misassigned the colored cables, with the blue wire (which should be high) configured as low. After swapping the blue and brown wires between the low and high terminals and mounting the outgoing PAR sensor facing upward, it recorded values very similar to the incoming PAR.

We connected the HMP fan to power and marked with colorful tape the fence posts to which the guys are attached so that any car drives over them.

Smartflux: we could not connect to the status server.

Readings before cleaning:
Li-7500
CO2 (ppm): 420
H2O (ppm): 534
TºC: 16.33
P (kPa): 101.53
SS%: 95.33

Li-7700
CH4 (ppm): 2.07
RSSI%: 38.35

Readings after cleaning:
Li-7500
CO2 (ppm): 414.5
H2O (ppm): 585.8
TºC: 17.86
P (kPa): 101.57
SS%: 99.54

Li-7700
CH4 (ppm): 2.04
RSSI%: 80.91