Shinwa 72730 User manual

●Forsimplemeasuringofsoilacidity,soiltemperature,moisture,salinity,
andilluminanceinthegrowingenvironment
■Use
■Specifications
*Soilaciditydisplayedistheresultofachemicalreactionbetweenthemeasuringpartand
thesoilspHelement,whichisconvertedtoapHvalue.
■Features
■PartNames
Display
LOW−
LOW
LOW＋
NOR−
NOR
NOR＋
HGH−
HGH
HGH＋
Lux
under500Lux
500-3,000Lux
3,000-7,000Lux
7,000-10,000Lux
10,000-25,000Lux
25,000-30,000Lux
30,000-40,000Lux
40,000-60,000Lux
over60,000Lux
Caution
●Donotuseotherthanasintended
●Whenmeasuring,sprinklewateronthesoilandmakesurethatthesoilis
sufficientlymoistsothatitcanadherewelltothemeasuringpart
●Thisproductisforsoilonly.Donotinsertintowateroranyotherliquid,asthis
maycausemalfunction.
●Cannotbeusedwithdrysoilorsoilcontainingsignificanthumus,peatmoss,
kanumasoil,akadamasoil,orsandthatdoesnotadheretothemeasuringpart
●Cannotmeasureaccuratelyinsmallpotsorothernarrowenvironments
●Cannotmeasurealkalinity
●Measurementsofilluminance,soilmoisture,andsalinityaresimplified.Please
usethemasaguide.
●Whenmeasuringsoilacidity,soiltemperature,soilmoisture,andsalinity,
removethecapfromthemeasuringpart
●Afterspreadinglime,etc.toadjustacidity,allow1-2weeksforittomixintothe
soilbeforetakingmeasurements.Otherwise,thesoilmaytendtobestrongly
acidic.
●Whenstoringthedevice,cleanthemeasuringpartandreplacethecapto
protectitfromoxidation
●Soilmoistureisdisplayedbypassinganelectriccurrentthroughthesoilmaking
contactwiththemeasuringpart,andquantifyingitbyitsresistancevalue.The
valueshownmaybelowerthantheactualvaluedependingonthedegreeof
adhesiontothesoil.
●Donotallowtheprobetoremaininsertedasthiscouldcauseittocorrode
●Donotbendtheprobe
●Donotloosentheclodofsoilwiththeprobe
●Donotallowtheprobetocomeincontactwithmetal.Whenstoring,make
surethatitdoesnotmakecontactwithothermetals.
●Beforeuse,polishthemeasuringpart(about10cmfromthetipoftheprobe)
withfinesandpaper(#400-1000)toremoveoxide
●Donottouchthemeasuringpartwithbarehands
●Donotdroporsubjecttostrongimpact
●Donotdisassemblethedeviceotherthanasdirectedinthismanual
●Thisproductisnotwaterproof.Donotwashwithwateroruseintherain.
●Donotuseorstoretheproductinanenvironmentabove40°C
●Useaclean,softclothwhenwipingtheproduct
●Removethebatterieswhenthedevicewillnotbeusedforalongperiod.Itmay
breakduetoliquidleakage.
Display
DRY＋
DRY
NOR
WET
WET＋
Soilmoisture*
under5%
5-10％
10-20％
20-３０％
over30%
*Forthisdevice,soilmoistureisdefinedasfollows:
*Displayedvaluesareroundedupfrom0.25androundeddownfrom0.24.
Display
DANGER
NOR
1.1%ormore
1.0%orless
Soilsalinity
display
ItemCode72730
DigitalSoilpHMeterA-2
InstructionManual
ThankyouforpurchasingShinwas
DigitalSoilpHMeterA-2.Beforeusing
theproduct,pleasereadtheinstructions
containedinthismanualtoensure
correctuse.Afterhavingreadthis
manual,alwayskeepitwithyouorina
safeplace.
Illuminance
sensor
●Front ●Back
●ExplanationofLCDscreen
LCD
screen
ON/OFFswitch
Probe
Measuring
part
(approx.
10cm)
Modeswitch
Battery
cover
⑤Illuminancedisplay
Displayedin9levels.
⑥Soilmoisturedisplay
Displayedin5levels.
⑦Soilsalinitydisplay
Soilsalinityis
displayedin2levels.
①PH(soilacidity)display
Turnsonwhenmeasuringsoilacidity.
②Soiltemperaturedisplay
Turnsonwhenmeasuringsoiltemperature.
③ PH,soiltemperaturemeasurementvaluedisplay
Displaysthemeasurementresults.
*Loisdisplayedwhenexceedingthedisplayrangeʼs
lowerlimit.HHisdisplayedwhenexceedingthe
displayrangeʼsupperlimit.
④Lowbatteryalarm
Thebatteryiconwillbedisplayedwhentheamountremainingis3.65V.
Cap
*Removecapwhen
measuring
OperatingTemperature/
Humidity
PowerSource
AutoPowerOff
AutoBacklightOff
BodySize
Weight
MeasuringTarget
SoilAcidity(12levels)
SoilTemperature
SoilSalinity(2levels)
SoilMoisture(5levels)
Illuminance
(9levels)
MeasuringRange
SoilAcidity,Soiltemperature,Soilsalinity,Soilmoisture,Illuminance
pH3.5-pH9.0（minimumdisplaypH0.5
*
,accuracy±pH0.5）
5-40℃（minimumdisplay1℃,accuracy±1℃）
DANGER,NOR
DRY+,DRY,NOR,WET,WET+
3×AAAalkalinebatteries
(Batteriesincludedarefortrialuseonlyandmaynotlastlong.)
Turnsoffapproximately5minutesafteroperationstops.
Backlightturnsoffapproximately1minuteafteroperationstops.
Temperature：5-40℃ 
Humidity：5-95％(nocondensation)
293×60×37mm（Probeφ6×180mm）
132g(includingbatteries)
LOW−,LOW,LOW＋,NOR−,NOR,
NOR＋,HGH−,HGH,HGH＋
①②
③④
⑥
⑦
⑤
Soilmoisture(percent)=
Weightofwater/Weightofsoilincludingwater×100
注 意
●測定前に土壌に十
分水分を含ませて
からプローブの先
端１０cmが土壌に
しっか りと密 着 す
るように 挿してく
ださい。
●防水ではありませ
ん。水で洗ったり、
雨 に 濡 れ たりし な
いように注 意して
くださ い。
-1- -2-
-3- -4-
●Non-slipelastomerconstruction,shapedforeasyinsertionintosoil
●Easy-to-readLCDscreenwithlargenumbersandawideviewingangle
●Modeswitchonthefrontpanelmakesiteasytochangebetweensoil
acidity*andtemperature
●Backlightfunction
●
Enablessimplemeasurementofsoiltemperature,illuminance,soilmoisture,
andsalinity
3-18-21Koya,Sanjo,Niigata,955-8577JAPAN
https://www.shinwasokutei.co.jp/english/
MADEINCHINA
Shinwa Rules Co., Ltd.

Displayisunstable.
Unusualnumerical
values,etc.
Onlythebacklight
comeson
Soildoesnotbecome
alkalineevenafter
spreadinglime.
Thesoilisacidic
evenafterspreading
lime.
Thesoilacidity
displaydoesnot
changefrom7.0.
Thesoilmoisture
displayonlyshows
DRY.
Thesalinitydisplay
onlyshowsNOR.
Theilluminance
displayonlyshows
LOW.
・Pleaseremovethecap.
・Makesurethatthesoilhasenoughmoisture
toadheretothemeasuringpart.
・Polishoffanyoxidationorremovedirtfrom
themeasuringpart(PleaserefertotheBefore
Usingsection).
・Devicemaynotrespondtosoilwithcoarse
particles,suchashumus,peatmoss,kanuma
soil,andakadamasoil,asthesoilmaynot
adheretothemeasuringpart.
・Makesurethatthereisnothingblockingthe
sunlightandthatthesensoriswelllit.
・Aftercleaningthemeasuringpart,measure
againatadifferentpoint.
・Sprinklewaterandmixthesoilwell(Makesure
ithassufficientmoistureasifamudballwas
tobemade).
・Reinsertthebatteries.
・Afterspreadinglime,allow1-2weeksforitto
mixintothesoilbeforetakingmeasurements.
・Spreadingmorelimethannecessarymay
causethesoiltobecomeacidic.Waterthe
soiltoflushoutthelime.
・Theremaybetoomuchfertilizer.Waterthe
soiltoflushoutexcessfertilizer.
・Afterspreadinglime,allow1-2weeksforitto
mixintothesoilbeforetakingmeasurements.
・Replacewithnewbatteries.
Thepowerdoesnot
comeon.
・Replacethebatterieswithnewones.
・Removethebatterycoverandremovethe
pre-insertedinsulationsheet.
Fine-grainedsoil
(fieldsoil,etc.)
Coarsesoil
(sandysoil,etc.)
Lightlypolish
about10cm
fromthe
tip
Packsoilaround
measuring
part
Removetheinsulatingsheetthathasbeeninsertedand
installthebatteriesbeforeusing.
①Openthebatterycoveronthebackofthedevice
andinsertthebatteriesinthedirectionshowninthe
figureontheright.
②Replacethebatterycover.
■InstallingtheBatteries
■BeforeUsing
●Thisproductisdesignedtomeasurethesoil
environmentandcannotmeasureliquidsor
non-soilmaterials
●Coarse-grainedsoil(humus,peatmoss,sand,
etc.)cannotbemeasuredaccurately
●Gentlypacksoilaroundthemeasuringpartso
thatthesoilcloselyadherestoit
●Themeasuringpartismadeofmetalandmay
oxidize.Oxidizationwillpreventthedisplayof
accuratevalues,sopolishthemeasuringpart
withfinesandpaper(#400-1000)beforeusing.
●TheLCDscreenshouldbevieweddirectlyin
front
■AfterUsing
●Wipeoffanydirtonthetipandstorewiththecapononcethetipisdry
*Thisproductisnotwaterproof.Donotwashwithwater.
●Removethebatterywhenstoringtheproductforalongperiod
■ProperSoilAcidity
●Eachcrophasitsownoptimumsoilacidity.Pleasecheckareputable
onlineresourceorlocalagriculturalinformationabouttheappropriatesoil
acidityforeachcrop(asthisvariesdependingontheenvironmentand
conditions).
■MeasuringaWideArea
■ProblemsandRemedies
①Ifthefieldislarge,collectfivesoilsamplesfromeachofthefourcorners
andthecenterofthefieldinordertofindtheaveragesoilacidity.
②Mixthecollectedsoilwellandletitdry.
③Crushthedriedsoilintosmallpiecesandsievetoremoveimpurities.
④Measureaccordingtotheproceduresdescribedin"●Measuringsoil
acidity"onpage5;thenumberdisplayedistheaveragesoilacidity.
over over
Aciditybecomesstronger
Neutral Alkalinitybecomesstronger
Lo 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 HH
●Measuringsoilacidity
■HowtoUse
①Sprinklewateronthesoilandmakesureithassufficientmoistureasifa
mudballwastobemade.
*Accuratemeasurementmaynotbepossibleifwaterhasnotmixedintothe
soilatthesamedepthofthemeasuringpart(about10cm).Becarefulnotto
splashtheproductwithwaterwhenwateringthesoil.
②Insertthemeasuringpartintothesoilvertically.Gentlypacksoilaround
themeasuringpartsothatthesoilcloselyadherestoitforastable
reading.
*Ifthemeasuringpart(about10cm)isnotindeepenough,itmaynotbeable
tomeasureaccurately.
*Accuratemeasurementmaynotbepossibleifthesoilhastoomuchfertilizer.
Ifso,waterthesoiltoflushoutexcessfertilizer.
③PresstheON/OFFswitchtoturnonthedevice.
④ThepHvalueofthesoilisdisplayedontheLCDscreen.Measurefor
about30secondsandreadthestablevalue.
⑤Toensureaccuratemeasurement,performseveralmeasurementsand
taketheaveragevalue.
Reference
Iftheresultislowerthanthedesiredvalue:limecanraisethepHvalue.
Iftheresultishigherthanthedesiredvalue:chemicalfertilizerororganicmatter
canlowerthepHvalue.
→Regardless,allow1-2weeksaftertreatmentbeforemeasuring.
①InsertthemeasuringpartintothesoilandpushtheON/OFF
switchtoturnonthedevice.
②Pressthemodeswitchtochangetothesoiltemperature
display.
●Measuringsoiltemperature
①InsertthemeasuringpartintothesoilandpushtheON/OFF
switchtoturnonthedevice.
②Illuminanceisdisplayedin9levels.
*Whenmeasuring,pleasemakesurethatyourbodyor
materialsuchasleaveswillnotobstructthesensor.
*Thisisasimplemeasuringinstrumentbasedonsunlight.It
cannotmeasurecorrectlyunderartificiallightsuchas
fluorescentlightorLEDlighting.
●Measuringilluminance
①InsertthemeasuringpartintothesoilandpushtheON/OFF
switchtoturnonthedevice.
②
Pressthemodeswitchtochangetothesoilmoisturedisplay.
③Soilmoistureisdisplayedin5levels.
*Donotusetoomuchforcewheninsertingintothesoilas
thiscoulddamagetheprobe.Forapottedplant,insertthe
measuringpartinthemiddlebetweenthestemandthe
edgeofthepot.Ifthediameterofthepotisover30cm,
insertinbetweentheedgeofthepotandthestemofthe
plantataspotabout1/3ofthedistancefromthestem.
Ifthepotisdeep,insertdeeplytothepointwheretheroots
areconcentrated(Takecarenottodamagetheroots).
●Measuringsoilmoisture
●Soilsalinity
①InsertthemeasuringpartintothesoilandpushtheON/OFF
switchtoturnonthedevice.
②SoilsalinityisdisplayedontheLCDscreenin2levels(NOR
orDANGER).
Collectionsite
①
Symptom Remedy
③ ④
②
Mixsoilfromthe5spots
Sievethesoil
-5- -6-
-7- -8-
Valuedisplayedisthe
averagevalue
Sufficiently
moistenedsoil