Campbell CS475 Bedienungsanleitung PDF herunterladen (Seite 25)

User Manual

7. Installation

Before installing the radar sensor, you must consider all the suggested guidelines for

site and maintenance issues. Do not attempt to install the sensor unless you are

qualified to perform the installation. The sensor is designed for safe operation in

accordance with the current technical, safety, and ANSI standards.

If you are uncertain of the safe installation and operation of this

unit, read and understand all the instructions included in this

manual before attempting any installation or operation.

7.1 Site Selection

1. Mount the sensor high enough to prevent submersion during flooding

conditions.

Since the sensor is commonly installed over water from

tall structures, use appropriate safety equipment such as a

safety harness or a life preserver when installing or

performing maintenance on the sensor.

2. Install the sensor above the smoothest part of the water surface.

The smoothest part of the water surface is typically found halfway

between bridge piers. However, bridges with long spans between the

piers experience more vibration. For these bridges, vibration can be

minimized by mounting the sensor a quarter to a third of the distance

to the next pier.

3. Avoid mounting near horizontal structural surfaces such as beams, brackets,

and sidewall joints because these surfaces reflect a strong signal. If these

structures cannot be avoided, use the False Echo Learn command to map out

the interfering structures in the beam profile (see Appendix B.1.1, Start False

Echo Learn).

4. Center the sensor beam a minimum of 2.5 m from any obstruction in the

measurement range. Obstructions to be aware of include excessive waves,

splashing, pipes, wires, and logs. Note that the radiation beam spreads as it

leaves the sensor (see Table 4-2 and Table 4-3 in Section 4, Quickstart).

Usually the beam path is 10° for the CS475, and 8° for the

CS476/CS477.

5. Be aware that bridges contract and expand with temperature changes. Traffic

loads or trucks can also cause changes to the bridge height.

6. Do not install the sensor where submerged obstructions such as rocks or bridge

piers can distort or disturb water level.

CAUTION

WARNING

NOTE

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Campbell CS475 Bedienungsanleitung Seite 25