Specifications

viii
List of Figures
Figure Page
1.1 Weather station located at TWDEF, Cache, UT. . . . . . . . . . . . . . . . 3
2.1 Two common approches to extract soil moisture fr om ET (figure proccured
from Bernard et al. [1]). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Figure of the Campbell Scientific’s CR200 series datalogger. . . . . . . . . . 12
2.3 Picture of Sutron’s 8210 datalogger. . . . . . . . . . . . . . . . . . . . . . . 14
2.4 Figure showing Automata’s Mini-SS logger. . . . . . . . . . . . . . . . . . . 16
2.5 The Em50R from Decagon Devices. . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Depiction of the general hardware design. . . . . . . . . . . . . . . . . . . . 21
3.2 Depiction of the general firmware design. . . . . . . . . . . . . . . . . . . . . 27
3.3 Artistic depiction of the Acclima DataManager’s enclosure and front panel. 36
4.1 Diagram of the power subsystem. . . . . . . . . . . . . . . . . . . . . . . . . 38
4.2 A schematic representation the reverse polarity protection circuit. . . . . . 39
4.3 Picture of the Maxstream XBee-Pro radio module. . . . . . . . . . . . . . . 44
4.4 Custom LCD glass art generated for this project. . . . . . . . . . . . . . . . 46
5.1 A depiction of the test platform (circuit board s hown). . . . . . . . . . . . . 48
5.2 Beta test hardware (covered by face p late). . . . . . . . . . . . . . . . . . . 50
6.1 Final DataManager product with enclosure actively measuring precipitation
and soil water content at a USU test site. . . . . . . . . . . . . . . . . . . . 55