Instruction manual

CS650 and CS655 Water Content Reflectometers

7.3 Datalogger Wiring

Our dataloggers typically use SDI-12 to measure the sensor because RS-232

communication requires more control ports per CS650 and RS-232

programming is more complicated than SDI-12 programming. SDI-12

communication also allows up to ten probes to be given different addresses and

then share a single control port.

TABLE 7-1 shows the SDI-12 wiring for the CS650 water content

reflectometer. SDI-12 data is transmitted to a CRBasic datalogger odd

numbered control port or U terminal. Wiring information for RS-232

communications is provided in Section 8.1.1.2, RS-232 Wiring

(p. 12).

TABLE 7-1. CS650 Wiring Code for SDI-12

Color Function Datalogger Connection

Green SDI-12 Data

SDI-12 Input, Control Port,

or U* configured for SDI-12

measurement

Red SDI-12 Power 12 V

Black SDI-12 Reference G

Clear Shield G

Orange Not Used G

The orange Rx wire is only used for RS-232 Tx/Rx

communication, and should be grounded when using SDI-12.

7.4 Programming

Short Cut is the best source for up-to-date datalogger programming code.

Programming code is needed,

• when creating a program for a new datalogger installation

• when adding sensors to an existing datalogger program

If your data acquisition requirements are simple, you can probably create and

maintain a datalogger program exclusively with Short Cut. If your data

acquisition needs are more complex, the files that Short Cut creates are a great

source for programming code to start a new program or add to an existing

custom program.

Short Cut cannot edit programs after they are imported and edited

in CRBasic Editor.

A Short Cut tutorial is available in Section 4, Quickstart (p. 2). If you wish to

import Short Cut code into CRBasic Editor to create or add to a customized

program, follow the procedure in Appendix A, Importing Short Cut Code into

a Program Editor

(p. A-1). Programming basics for CRBasic dataloggers are

provided here. Complete program examples for select CRBasic dataloggers

can be found in Appendix B, Example Programs

(p. B-1). Programming basics

NOTE