Campbell Scientific CR10X Measurement and Control System - Manual (Page 350)

LIST OF FIGURES
LF-2
PAGE
7.16-1 A Vibrating Wire Sensor ....................................................................................................... 7-16
7.16-2 Well Monitoring Example...................................................................................................... 7-18
7.16-3 Hook up to AVW1................................................................................................................. 7-19
7.17-1 CR10X/Paroscientific "T" Series Transducer Wiring Diagram ............................................. 7-22
7.18-1 Wiring Diagram for CURS100 Terminal Input Module and 4 to 20 mA Sensor ................... 7-24
8. PROCESSING AND PROGRAM CONTROL EXAMPLES
8.3-1 AM416 Wiring Diagram for Thermocouple and Soil Moisture Block Measurements ............. 8-4
8.5-1 Connections for Rain Gage .................................................................................................... 8-5
8.11-1 Simulated 1.25 and 0.25 Hz Signals..................................................................................... 8-15
8.11-2 FFT Power Spectra Analysis of 0.25 and 1.25 Hz Signal..................................................... 8-16
8.11-3 Simulated Ocean Buoy Wave Data ...................................................................................... 8-19
8.11-4 Simulated Ocean Buoy FFT Results .................................................................................... 8-19
8.12-1 Connections to Power Two 12 V ASPTCs with the Switched 12 V on the
CR10X Wiring Panel ............................................................................................................ 8-23
9. INPUT/OUTPUT INSTRUCTIONS
9-1 Conditioning Large Voltage Pulses......................................................................................... 9-2
9-2 Recommended input conditioning circuit for period averaging............................................. 9-16
10. PROCESSING INSTRUCTIONS
10-1 Quadrant that the Angle Falls in is Defined by the Sign of x and y..................................... 10-16
11. OUTPUT PROCESSING INSTRUCTIONS
11-1 Input Sample Vectors ........................................................................................................... 11-2
11-2 Mean Wind Vector ................................................................................................................ 11-3
11-3 Standard Deviation of Direction ............................................................................................ 11-3
13. CR10X MEASUREMENTS
13.1-1 50 and 60 Hz Noise Rejection .............................................................................................. 13-1
13.2-1 Timing of Single-Ended Measurement ................................................................................. 13-2
13.2-2 Differential Voltage Measurement Sequence ....................................................................... 13-2
13.3-1 Input Voltage Rise and Transient Decay .............................................................................. 13-4
13.3-2 Typical Resistive Half Bridge ................................................................................................ 13-5
13.3-3 Source Resistance Model for Half Bridge Connected to the CR10X ................................... 13-5
13.3-4 Wire Manufacturers Capacitance Specifications, Cw .......................................................... 13-6
13.3-5 Model 024A Wind Direction Sensor ..................................................................................... 13-6
13.3-6 Resistive Half Bridge Connected to Single-Ended CR10X Input.......................................... 13-7
13.3-7 Half Bridge Configuration for YSI #44032 Thermistor Connected to CR10X ..................... 13-11
13.3-8 Measuring Input Settling Error with the CR10X .................................................................. 13-12
13.3-9 Incorrect Lead Wire Extension on Model 107 Temperature Sensor .................................. 13-12
13.4-1 Thermistor Polynomial Error............................................................................................... 13-14
13.4-2 Diagram of Junction Box .................................................................................................... 13-17
13.5-1 Circuits Used with Instructions 4-9 ..................................................................................... 13-18
13.5-2 Excitation and Measurement Sequence for 4 Wire Full Bridge.......................................... 13-19
13.6-1 AC Excitation and Measurement Sequence for AC Half Bridge......................................... 13-21
13.6-2 Model of Resistive Sensor with Ground Loop .................................................................... 13-21