Campbell CS475 Specifikace stáhnout pdf (Strana 16)

CS475, CS476, and CS477 Radar Water Level Sensor

TABLE 5-3. Example for Setting Water Stage

Initial Command Response

0XSS+7.010!

Where (from left to right),

0—sensor’s address;

7.010—the initial water depth value

used to calculate subsequent stage

measurements

00011<cr><If>

Where (from left to right),

0—sensor’s address;

001—the amount of time (in seconds)

that you must wait before sending the

send data command;

1—the number of values that will be

placed in the buffer.

Subsequent Command Command Response

0D0!

Where the first zero is the sensor

address.

This is the send data command.

0+7.010<cr><If>

Where (from left to right),

0—sensor’s address;

7.010—the initial water depth value

used to calculate subsequent stage

measurements

6. 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. 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 at: www.sdi-12.org.

6.1 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.

The values returned from the SDI12Recorder( ) instruction are different

depending on the SDI12 measurement command issued. The SDI12Recorder

instruction sends the command specified by the SDI12Command parameter as

(address)SDI12Command!.

SDI12Recorder (Dest, SDIPort, SDIAddress, "SDICommand", Multiplier,

Offset)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 39 40

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