Specifications

EN.PM.UM13 20140227 Earth Networks Weather Station Page 15 of 47
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FindingtheBestLocation–WeatherStation&LightningSystem
FortheoptionalLightningSystemitisimperativethattheweatherstationand
lightingequipmentisplacedawayfromanynoise/interferencesources.The
followingareexamplesofnoisesourcesthatintroducefalsedataintothelightning
stream:
o PowerLines(EspeciallyHighTensionLines)
o Motors(elevator,HVAC,exhaust/ventilationfans)
o Anythingthatproducesaspark
o MultibayAutomotiveShop(enginesparkplugs)
o WeldingShop
o ElectricFences
o FluorescentLights
o StadiumLights
o Gymroof(iflightsensorisdirectlyabovegym)
o PowerSubStations
o AMRadioTowers
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Placingthelightningsysteminacloseproximitytoanyoftheabovementioned
systemscouldrenderthedatafromthelightningsystemunusableduetotheamount
ofnoisethatisdetectedbythesystem.Themastmustbegroundedtoan"earth"
ground.Notgroundingthesystemproperlymayalsoresultinnoise.Thesystem
mustbegroundedproperlyandlocatedawayfromnoisesourcesinordertoclearly
identifytheuniqueradiofrequencysignatureofstaticdischargecausedbylightning.
Example:HVACUnitsgenerateElectrical/RFnoisethatcaninterferewithENLS
Performance.Basedonthefigurebelow,performanceofsensorsplacedinred
or
darkredlocationscansignificantlydegradethesystem’sabilitytodetectlightning
signalsabovetheHVACnoise.
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