Campbell Scientific CR23X Micrologger - Manual (Page 5)

CR23X TABLE OF CONTENTS
iii
7.12 Lysimeter - 6 Wire Full Bridge ............................................................................................... 7-9
7.13 227 Gypsum Soil Moisture Block......................................................................................... 7-11
7.14 Nonlinear Thermistor in Half Bridge (Model 101 Probe) ..................................................... 7-12
7.15 Water Level - Geokon’s Vibrating Wire Pressure Sensor ................................................... 7-13
7.16 Paroscientific “T” Series Pressure Transducer.................................................................... 7-17
7.17 4 to 20 mA Sensor using CURS100 Terminal Input Module ............................................... 7-20
8. PROCESSING AND PROGRAM CONTROL EXAMPLES
8.1 Computation of Running Average.......................................................................................... 8-1
8.2 Rainfall Intensity..................................................................................................................... 8-2
8.3 Using Control Ports and Loop to Run AM416 Multiplexer..................................................... 8-3
8.4 Sub 1 Minute Output Interval Synched to Real Time ............................................................ 8-5
8.5 Switch Closures on Control Ports (Rain Gage) ..................................................................... 8-5
8.6 SDM-AO4 Analog Output Multiplexer to Strip Chart.............................................................. 8-6
8.7 Converting 0-360 Wind Direction Output to 0-540 for Strip Chart ......................................... 8-7
8.8 Use of 2 Final Storage Areas - Saving Data Prior to Event................................................... 8-8
8.9 Logarithmic Sampling Using Loops ....................................................................................... 8-9
8.10 Covariance Correlation Programming Example .................................................................. 8-11
8.11 Fast Fourier Transform Examples ....................................................................................... 8-15
8.12 Using the Switched 12 V to Power Sensors ........................................................................ 8-22
INSTRUCTIONS
9. INPUT/OUTPUT INSTRUCTIONS .................................................................................... 9-1
10. PROCESSING INSTRUCTIONS ..................................................................................... 10-1
11. OUTPUT PROCESSING INSTRUCTIONS .................................................................. 11-1
12. PROGRAM CONTROL INSTRUCTIONS ..................................................................... 12-1
MEASUREMENTS
13. CR23X MEASUREMENTS
13.1 Fast and Slow Measurement Sequence.............................................................................. 13-1
13.2 Single-Ended and Differential Voltage Measurements........................................................ 13-2
13.3 The Effect of Sensor Lead Length on the Signal Settling Time........................................... 13-4
13.4 Thermocouple Measurements ........................................................................................... 13-14
13.5 Bridge Resistance Measurements..................................................................................... 13-20
13.6 Resistance Measurements Requiring AC Excitation ......................................................... 13-24
13.7 Calibration Process............................................................................................................ 13-25