Campbell PC208W Manuel d'utilisateur télécharger pdf (Page 7)

MicroMet Manual Pg. 4

Installation

Site Selection Considerations

Communications Window Aperture

What is the horizon in the direction of radiation (toward the Master Station)? If the horizon

toward AMBCS is high and the site is at long range (600+ miles), communications may be

very slow.

Local Interference

Try to locate the station away from potential radio interference sources such as high

voltage power transmission lines, engine ignition systems, etc. When potential

interference systems are in the general area, try to locate the site such that the antenna

does not look toward those interference sources.

Sensor Installation Considerations

Here are some thoughts regarding the installation of the sensors.

1. It is generally a good idea to keep the site power cabling, the coaxial antenna cable

and the sensor cabling separated as much as possible to keep the sensor noise out

of the radio receiver and to keep the radio transmitter power out of the sensors.

Three separate access holes are provided in the NEMA box with that in mind.

Excess cable length should be coiled in a figure eight fashion to minimize inductive

coupling.

2. Since sensor mounting devices have metallic components, and sensors themselves

can be noise sources, it is wise to locate the sensors away from the plane of the

radio antenna. Try not to locate sensors near the antenna or within the antenna’s 60

degree window toward the Master Station. If possible, locate sensors and their

structure off to the side of the antenna.

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Campbell PC208W Manuel d'utilisateur Page 7