User Manual


WaterTecS100UserManual 16
Step6–CalibratetheSensor(ManualCalibration)
Iftheautocalibraondoesnotsetanacceptablethreshold,youmightwantto
performthefollowingmanualcalibraonprocedure.
1. BurythesensorasdescribedinStep4(onpages12—13)usingafullbucketof
watertoremoveairpocketsaroundthesensor.
2. PuttheS100
inBypassmode.ToenableBypassmode,brieflypresstheBypass
buon.WhenBypassmodeisenabled,theS100displayperiodicallyflashesOFF
andtheDry/AllowLEDemitsadoubleflash.
3. Configurethesprinklermertowaterusingsoakcyclesandallowing½”to¾”
of
accumulatedwaterforthecycles.
4. Runthesystem.
5. Whenwateringhasfinished,turnoffthesprinklermerandtaketheS100outof
Bypassmode.TodisableBypassmode,brieflypresstheBypassbuon.When
Bypassmodeisdisabled,theS100returnstothedefault
display.
6. Carefullywatchyourlandscape.Whenitgetstothepointwhereyouthinkthat
youcannotwaitanotherdaytowater,brieflypresstheRead/Setbuononthe
S100todisplaythecurrentmoisturereading.Rememberthisreading.
7. PressandholdtheRead/Setbuon,andthenpressthe+or–buontoadjust
thethresholdtomatchthecurrentmoisturereading.
8. Turnthesprinklermerbackon.Thesystemwillwateratthenextstartmeand
thenmaintainthemoistureatyouracceptablethreshold.
ManuallyAdjustingtheThreshold
AsthegrassrootsgrowbackaroundthebiSensor,youmightneedtomanuallyadjust
thethreshold.Observelawncondions,andthenadjustthethresholdasneeded.
 Raisingthethresholdresultsinmorefrequentwatering.
 Loweringthethresholdresultsinlessfrequentwatering.
1. TakeabiSensorreadingaerawateringcycle.BrieflypresstheRead/Set
buonandnotethereadingthatdisplays.
2. PressandholdtheRead/Setbuon,andthenpressthe+or–buontoadjust
the
thresholdslightlyaboveorbelowthecurrentmoisturereading(an
adjustmentof0.5‐1.0pointsisallthatshouldbenecessary).