Campbell CS475 Manual de usuario descargar pdf (Pagina 27)

User Manual

Table 7-1. Wiring Diagram

Colour

Description

CR800,

CR850,

CR1000,

CR3000,

CR10(X),

CR510, CR500

CR23X

CR5000

CR200(X)

White SDI-12 Signal Odd Numbered

Control Port

(C1, C3…)

Odd Numbered

Control Port

(C1, C3…)

Odd Numbered

Control Port

(C1, C3…)

SDI-12 C1/SDI-12

Clear Chassis Ground

Red +12V (Power

Supply for

Sensor)

12V 12V 12V 12V Battery+

Black Ground G G

G G

7.4.2 Multiple Sensors Connection

To use more than one probe per datalogger, you can either connect the different

probes to different SDI-12 compatible ports on the datalogger or change the SDI-12

addresses of the probes and let them share the same connection. Using the SDI-12

address minimizes the use of ports on the datalogger and also allows probes to be

connected in a daisy-chain fashion which can minimize cable runs in some

applications.

7.4.3 Built-in Self Test (BIST)

After connecting the sensor to the datalogger’s power terminals, the sensor performs

a BIST (built-in self test) for approximately 80 seconds (factory default). During

this self-check, an internal check of the electronics occurs.

7.5 Programming

This section is for users who write their own datalogger programs. A

datalogger program to measure this sensor can be created using

Campbell Scientific’s Short Cut Program Builder software. These

sensors are not listed in the sensor list in Short Cut. Instead, select

SDI-12 sensor under General Measurements (see Section 4.4, Step 4

— Use SCWin Short Cut to Program Datalogger and Generate

Wiring Diagram, for more information about using Short Cut). You

do not need to read this section to use Short Cut.

The radar sensor’s output is measured using a standard SDI-12 instruction to read

the data from an SDI-12 sensor. If using the sensor with other SDI-12 recorders,

please refer to your system’s documentation. Further details of the SDI-12

commands can be found in Appendix B and at: www.sdi-12.org.

7.5.1 CRBasic

Dataloggers that are programmed with CRBasic include the CR200(X) series,

CR800, CR850, CR1000, CR3000, and CR5000. These dataloggers use the

SDI12Recorder() instruction to read the sensor. The SDI12Recorder() instruction

should only be ran in the sequential mode.

NOTE

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Campbell CS475 Manual de usuario Pagina 27

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