229 Heat Dissipation Matric Water Potential SensorRevision: 5/09Copyright © 2006-2009Campbell Scientific, Inc.

229 Heat Dissipation Matric Water Potential Sensor FIGURE 4-1. Schematic of Connections for Measurement of a 229 Sensor 5. Example Programs 5.1 Ch

229 Heat Dissipation Matric Water Potential Sensor 5.2 Adjusting for Thermal Properties of Sensor During Early Heating Times The discussion presented

229 Heat Dissipation Matric Water Potential Sensor The AM16/32B multiplexer in 4x16 mode provides a convenient method to measure up to sixteen 229 sen

229 Heat Dissipation Matric Water Potential Sensor 5.5 Example #1 — CR1000 with CE4 and Four 229s Table 5-1 shows wiring information for reading four

229 Heat Dissipation Matric Water Potential Sensor 'CR1000 SequentialMode Const Num229 = 4 'Enter number of 229 sensors to measure Dim Lo

229 Heat Dissipation Matric Water Potential Sensor 5.6 Example #2 — CR1000 with AM16/32-series Multiplexer, CE4 and Sixteen 229 Sensors with Temperat

229 Heat Dissipation Matric Water Potential Sensor 'CR1000 SequentialMode Const Num229 = 16 'Enter number of 229 sensors to measure Const

229 Heat Dissipation Matric Water Potential Sensor 'Measure temperature after 30 second of heating TCDiff(Temp_30sec_C(i),1,mV2_5C,1,Type

229 Heat Dissipation Matric Water Potential Sensor ;{CR10X} ;Program to read 1 229-L sensor ;Reading 1 sensor takes 30 seconds *Table 1 Program 01:

229 Heat Dissipation Matric Water Potential Sensor 8: Excitation with Delay (P22) ;Wait 29 more seconds for next reading 1: 1 Ex Channel

Warranty and Assistance The 229 HEAT DISSIPATION MATRIC WATER POTENTIAL SENSOR is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in ma

229 Heat Dissipation Matric Water Potential Sensor 5.8 Example #4 — CR10X with AM16/32-series, CE4, and Sixteen 229 Sensors Table 5-4 shows wiring in

229 Heat Dissipation Matric Water Potential Sensor ;{CR10X} ;Program to read 16 229-L sensors using 1 AM16/32 multiplexer ;and 1 CE4 or CE8 constant c

229 Heat Dissipation Matric Water Potential Sensor 11: Thermocouple Temp (DIFF) (P14) ;Read thermocouple after 1 second of heating 1: 1 Reps

229 Heat Dissipation Matric Water Potential Sensor 22: Sample (P70) ;Sample 16 initial soil temperature readings 1: 16 Reps 2: 3 Loc [ Ti

229 Heat Dissipation Matric Water Potential Sensor correspond to the water potential expected during sensor use should be included in the calibration

229 Heat Dissipation Matric Water Potential Sensor The dryTΔ value requires that the ceramic be as dry as possible. Sensors cbe dried with desiccant

229 Heat Dissipation Matric Water Potential Sensor 0 500 1000 1500 2000600400200020040060010 degrees C16 degrees C18 degrees C22 degrees C24 degrees C

229 Heat Dissipation Matric Water Potential Sensor 0 100 200 300 400 500200100010020010 degrees C16 degrees C18 degrees C22 degrees C24 degrees C30 de

229 Heat Dissipation Matric Water Potential Sensor 2. With the sensor in place, use the TΔfrom the in situ measurement along with the dryTΔ, wetTΔ va

229 Heat Dissipation Matric Water Potential Sensor 3. Measurements of sensor temperature response are made periodically to determine if equilibration

229 Sensor Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks ta

229 Heat Dissipation Matric Water Potential Sensor FIGURE 6-4. Datalogger and Peripheral Connections for 229 Calibration 7. Maintenance The 229 doe

229 Heat Dissipation Matric Water Potential Sensor 8. Troubleshooting Symptom Possible Cause Action Temperature reading is offscale (-6999 or NAN) Th

229 Heat Dissipation Matric Water Potential Sensor 28 9. References Flint, A. L., G. S. Campbell, K. M. Ellett, and C. Calissendorff. 2002. Calibrati

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229 Sensor Table of Contents ii 9. References...28 List of Figures 1-1. 229 Heat Diss

229 Heat Dissipation Matric Water Potential Sensor 1. General Description The 229 Heat Dissipation Matric Water Potential Sensor uses a heat dissipat

229 Heat Dissipation Matric Water Potential Sensor Use of the 229 sensor requires a constant current source. Campbell Scientific offers the CE4 and C

229 Heat Dissipation Matric Water Potential Sensor A change in the water potential and water content of the ceramic matra corresponding change in the

229 Heat Dissipation Matric Water Potential Sensor 2. Specifications 229 Measurement range: -10 to -2500 kPa Measurement 30 seconds typical time:

229 Heat Dissipation Matric Water Potential Sensor 3.3 EquilibratioInstallationd the e ceramic pores with liquid water will optimize the hydraulic co