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MERLIN

P -WhenfirstpoweringupMERLIN,afterlongpoweroutages,orwhentotallyreset eakeakWind ting,theP

WinddirectionLEDswillnotfunctionuntilatleast1MPHwindhasbeenrecorded.

AverageWind-ThefirstreadingaftersettingtheAveragewillbethecurrentwindspeed.Thisreadingwill

settleoutasMERLINaccumulatesmoredata.Prevailingwinddirectionlightswillnotfunctionuntil12

minutesafterpoweringuporresetting.Aswiththewindspeedtherewillbenoprevailingdirection

indicationifthereisnotwind.

Forecast-WhenfirstpoweringupMERLIN,afterlongpoweroutages,orwhentotallyresetting,the

Forecastdisplaywillread"hld"(hold)for24minuteswhileMERLINisloadingitsmemory.Duringthe

25thminuteMERLINwillmakeatrendreading"inc"(increase),"dec"(decrease),"---"(nochange)

inwindspeedbasedoncomparingtwo12-minuteblocksoftime.Iftherehasbeennowindforan

entire12minutetiminginterval,thedirectionlightswillblankout.Ifthereisnowindforthenext

12minutesthenthedisplaywillshow"---"andthedirectionlightswillremainoff.

WindDirection-MERLINtakesareadingeverysecond Whenthewindchangesdirectionvery.

rapidly(fasterthan1second),somedirectionlightsmaynotlight.Thisisnormaloperationas

MERLINissimplybetweenreadings.

LatchUp-PowerLinedisturbancesorimproperpoweringup(plugginginthe

ACAdapterbeforewiring)cancauseablankorimproperdisplayreading.If

MERLINis"latchedup"proceedasfollows:

1.UnplugtheACadapter.

2.Wait15seconds.

3.PlugtheACadapterbackintoa110VACoutlet.

DuringlongpoweroutagesMERLIN'sdisplaywillblankoutandtheinstrumentwillnotcontinueto

accumulatedata.Itwillpreservethepreviouslyaccumulateddataforupto10years.

UsingtheForecastfunctionandperiodicallyupdatedAveragefunctiontogether,youcanoftenwatch

notonlysmallchangesinwindconditionsbutmoresignificant"backing"and"veering"patternsfortelling

frontalmovements.

IfyouareunsureastowhenForecastmadeit'slastupdate,waitmorethan12minutesandreadagain

(itupdatesevery12minutes).

WhenMERLINisinthe modesthedirectionlightsblink.Thisindicateseak, Average,andForecastP

thatyouareobservingrecordeddataandnotthepresentwinddirection.

SettingtheswitchtoAutodoesnoterasestoreddata.

Youdonotneedtotimethe6secondresettime,MERLINwillblankoutthedisplaytoindicatethatthe

memoryhasbeenerased.

OPERATION

(CONTINUED)

Page4

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