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CS475, CS476, and CS477 Radar Water Level Sensor

5. Configuration

5.1 Default Settings

In most circumstances, the default settings (see Table 5-1) should be used.

Refer to Appendix B for other setting options and SDI-12 commands.

TABLE 5-1. Default Settings

Setting Default Setting

SDI-12 Address 0 (You only need to change this if two sensors are

connected to the same port; valid addresses are 0

through 9, A through Z, and a through z.)

Units of Measure 1 = feet

Water Conditions 1 = smooth; (typical peak to trough of wave ≤4 inches)

Power Operation

Mode

1=on (Sensor is always on until a new power operation

mode command is received.)

5.2 Startup Procedure

The basic startup procedure for the radar sensor is as follows:

1. Mount, wire, and install the sensor (see Sections 3 and 4).

2. Do a Start False Echo Learn command followed by a Send Data

command. The Start False Echo Learn command is an essential function

during the setup of the sensor (see Section 5.2.1).

3. Enter the current water level using the Set Water Stage command followed

by a Send Data command (see Section 5.2.2).

4. Refer to Appendix B if you want to change defaults for the address, units

of measure, water conditions, and power operation mode.

5. Program the datalogger to measure the sensor (see Section 6).

5.2.1 Start False Echo Learn

The settings are changed using the 25616 Adjustment/Display

Module or the terminal emulator in LoggerNet or PC400.

During normal communication, the datalogger sends the address,

together with a command, to the sensor. The sensor then replies

with a “response”.

NOTE

The Start False Echo Learn command is an essential function during the

startup of the sensor. It is also used during testing if a problem is encountered.

The command allows the unit to learn about false echoes (noise) in the area.

With the False Echo Learn command, you enter the actual distance to the water

surface, as measured in meters or feet, depending on the Unit setting. The

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Campbell CS475 Specifiche Pagina 14