Campbell Scientific CR7 Measurement and Control System - Manual (Page 178)

LIST OF FIGURES
LF-2
PAGE
13. CR7 MEASUREMENTS
13.1-1 Timing of Single-Ended Measurement................................................................................. 13-1
13.2-1 Differential Voltage Measurement Sequence....................................................................... 13-2
13.3-1 Input Voltage Rise and Transient Decay.............................................................................. 13-3
13.3-2 Typical Resistive Half-Bridge ............................................................................................... 13-4
13.3-3 Source Resistance Model for Half-Bridge Connected to the CR7 ....................................... 13-4
13.3-4 Wire Manufacturers Capacitance Specifications, Cw .......................................................... 13-5
13.3-5 Model 024A Wind Direction Sensor ..................................................................................... 13-5
13.3-6 Resistive Half-Bridge Connected to Single-Ended CR7 Input ............................................. 13-6
13.3-7 Half-Bridge Configuration for YSI #44032 Thermistor Connected to CR7......................... 13-10
13.3-8 Measuring Input Settling Error with the CR7 ...................................................................... 13-10
13.3-9 Incorrect Lead Wire Extension on Model 107 Temperature Sensor.................................. 13-11
13.4-1 Diagram of Sensor Junction Box........................................................................................ 13-15
13.5-1 Circuits Used with Instructions 4-9..................................................................................... 13-16
13.5-2 Excitation and Measurement Sequence for 4 Wire Full Bridge ......................................... 13-17
13.6-1 AC Excitation and Measurement Sequence for AC Half-Bridge ........................................ 13-19
13.6-2 Model of Resistive Sensor with Ground Loop .................................................................... 13-19
14. INSTALLATION
14.2-1 Connecting Vehicle Power Supply to CR7 ........................................................................... 14-4
14.5-1 Typical Connection for Activating/Powering External Devices ............................................. 14-6
15. I/O CARD ADDRESSING AND MULTIPLE I/O MODULES
15.1-1 Position of Decoding Jumpers on Excitation, Pulse Counter & Analog Input Cards............ 15-2
15.1-2 Jumper Settings for Excitation and Pulse Counter Cards .................................................... 15-3
15.1-3 Jumper Settings for Analog Input Cards .............................................................................. 15-4
15.2-1 Location of Jumper Controlling Baud Rate to I/O Modules .................................................. 15-7
15.2-2 Location of I/O Module Jumper Controlling Baud Rate........................................................ 15-8
APPENDIX D. CALIBRATION PROCEDURES
D.2-1 Calibration Points for the Analog Interface Card.................................................................... D-3