Campbell TurfWeather Instruction Manual

Contents

Campbell TurfWeather Instruction Manual Manual pdf 25 page image

TurfWeather Weather Station2.3.1.2 Grounding IssuesOutdoor cables may be subject to induced currents due to lightning or otherenvironmental factors. Therefore proper grounding is imperative to avoiddamage to the weather station and/or the Host computer.To minimize the possibility of equipment damage orpersonal hazard, we strongly recommend a qualifiedelectrician design and install the grounding and dataisolation components of a directly wired installation.CAUTION2.3.2 Wireless Communications2.3.2.1 Transmission RangesSite your TurfWeather weather station within the spread spectrum radiotransmission range. Typical transmission ranges are listed below: Up to ½ mile (0.8 km)for the weather station 916MHz and weather station922MHz Up to ¼ mile (0.4 km)for the weather station 2.40GHz Up to 7 miles if an optional higher gain antenna is installed on both theweather station and the RF401 Base Stationa. The transmission ranges assume standard weather stationantennas are used at the computer site. User-supplied, highergain antennas at the base station or on the weather station canincrease the transmission range.NOTEb. The ranges assume no obstructions are in the line-of-sight.Line-of-sight is defined and described below.2.3.2.2 Line-of-SightLine-of-sight is defined as a straight path between a transmitting and receivingantenna that is unobstructed by intermediate topography or obstructions (seeFigure 2-2). A clear line-of-sight is required to achieve the optimumtransmission range. The affect of obstructions on the transmission range canvary. Therefore if obstructions lie within the line-of-sight, you should test yourradio transmissions before permanently installing your weather station (seeTesting Radio Transmissions (Section 2.3.2.3).18