Support User Manuals

La Crosse Technology WS2813UIT Weather Radio User Manual

Open as PDF

of 31

Page|22

Everytimeanewaveragepressurevaluehasbeenobtained(onceperminute),thisvalueis

comparedwithaninternalreferencevalue.Ifthedifferencebetweenthesevaluesisbigger

thantheselectedweather tendencysensitivity,theweather‐iconchanges,eitherforworseor

forbetter.Inthiscase,thecurrentpressurevaluebecomesthenewweathertendency

reference.



Iftheiconsdonotchange,eithertheairpressurehasnotchangedorthechangehasbeentoo

smallfortheWeatherCentertoregister.Youmayadjustthe"sensitivity"ofthepressure

changecheckinthesettingmode–seeWEATHERTENDENCYSENSITIVITYVALUESETTING

above.

Iftheicondisplayedisasunorrainingcloud,therewillbenochangeoficoniftheweathergets

anybetter(withsunnyicon)orworse(withrainyicon)sincetheiconsarealreadyattheir

extremes.

Thedisplayediconforecaststheweatherintermsofgettingbetterorworseandnot

necessarilysunnyorrainyaseachiconindicates.Forexample,ifthecurrentweatheriscloudy

andtherainyiconisdisplayed,itdoesnotmeanthattheproductisfaultybecauseitisnot

raining.Itsimplymeansthattheairpressurehasdroppedandtheweatherisexpectedto

get

worsebutnotnecessarilyrainy.

Note:Aftersetup,readingsforweatherforecastsshouldbedisregardedforthenext48‐60

hours.ThiswillallowsufficienttimefortheWeatherstationtocollectairpressuredataata

constantaltitudeandthereforeresultinamoreaccurateforecast.

Commontoweatherforecasting,absoluteaccuracycannotbeguaranteed.Theweather

forecastingfeatureisestimatedtohaveanaccuracylevelofabout75%duetothevarying

areastheWeatherCenterhasbeendesignedforuse.75%accuracyiscomparabletothebest

meteorologicalforecastingrate.Inareasthatexperiencesuddenchangesinweather(for

examplefromsunnytorain),theWeatherCenterwillbemoreaccuratecomparedtousein

areaswheretheweatherisstablemostofthetime(forexamplemostlysunny).

IftheWeatherCenterismovedtoanotherlocationsignificantlyhigherorlowerthanitsinitial

standingpoint(forexamplefromthegroundfloortotheupperfloorsofahouse),discardthe

weatherforecastforthenext48‐60hours,astheWeatherCentermaymistakethenew

locationasbeingapossiblechangeinair‐pressurewhenreallyitisduetotheslightchange

of

altitude.

WEATHERTENDENCYINDICATOR

Workingtogetherwiththeweathericonsistheweathertenden cyindicators(arrowslocated

ontheleftandrightsidesoftheweathericons).Whentheindicatorpointsupwards,itmeans

thattheair‐pressureisincreasingandtheweatherisexpectedtoimprove,butwhenthe

indicatorpointsdownwards,theair‐pressureisdroppingandtheweatherisexpectedto

becomeworse.



Takingthisintoaccount,onecanseehowtheweatherhaschangedandisexpectedtochange.

Forexample,iftheindicatorispointingdownwardstogetherwithcloudandsunicons,thenthe

previous next