ii
9. References
.................................................................. 26
List of Figures
1-1. 229 Heat Dissipation Matric Water Potential Sensor and Hypodermic
Assembly ............................................................................................. 1
1-2. CE4 and CE8 Current Excitation Modules ............................................. 2
1-3. Typical Temperature Response of 229 Sensor in Silt Loam Soil ........... 3
4-1. Schematic of Connections for Measurement of a 229 Sensor ................ 5
6-1. Data Points and Regression for Typical Calibration ............................ 19
6-2. Measurement error for range of soil temperatures and wide range of
matric potential .................................................................................. 21
6-3. Measurement error for range of soil temperatures and wetter range of
matric potential .................................................................................. 22
6-4. Datalogger and Peripheral Connections for 229 Calibration ................ 24
List of Tables
4-1. 229 Sensor and CE4/CE8 Wiring ........................................................... 5
5-1. Wiring for Four 229s with CR1000 and CE4 ......................................... 8
5-2. 229 Sensor and CE4 Wiring with CR1000 and AM16/32-series ......... 10
5-3. 229 Sensor and CE4/CE8 Wiring with CR10XTCR ............................ 12
5-4. 229 Sensor and CE4/CE8 Wiring with AM16/32 Multiplexer ............. 15
