Campbell CR7 Manual de Instruções descarregar pdf (Página 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, C

.......................................................... 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

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Campbell CR7 Manual de Instruções Página 178