12/4, 16:15 pm, Tom, Gordon
Opened door of aux mote (ID8) and checked voltage at white power connector: 11.5 V.
Sequentially pulled and replaced one sensor at a time. Voltage recovered to 11.6 when Qsoil, Gsoil, TP01 removed, to 11.7 when Tsoil removed.
The mote was running all during this time. It is supposed to shut down when the voltage falls below 11.9. It appears that the mote voltage measurement was erroneously high, see plot and
discussion below.
When Tsoil was unplugged, Gsoil and TP01 were reporting, no Qsoil.
When Tsoil was plugged in, Gsoil abruptly changed from 9.4 to -1.
Replaced battery. Voltage 12.46 without Tsoil. Now receiving Q,G and TP01. When Tsoil was plugged in, it caused step change in G and Qsoil. Left Tsoil unplugged. Note that Qsoil started reporting after the battery was replaced.
Attached is a plot of soil variables from aux at playa1. When the Tsoil goes bad it effects the measurement of Vmote and Gsoil. When we arrived at the site and disconnected Tsoil then Vmote dropped from 17 V to a more correct value of 12. The Vmote values of 12.5 V after 17:00 MST are with the replaced battery.
