User manual

User Manual
17
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
G
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