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PH20 Value pH Tester

Instruction Manual

APERA INSTRUMENTS, LLC

www.aperainst.com v 3.4

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1.BatteryInstallation

Please install batteries according to the following steps. *Please note the correct direction of battery installation:

The Positive Side (“+”) OF EVERY SINGLE Battery MUST FACE UP.

(WRONG INSTALLATION OF BATTERIES WILL CAUSE DAMAGE TO THE

TESTER AND POTENTIAL HAZARDS!)

2.KeypadFunctions

■Shortpress-------<2seconds

■Longpress-------->2seconds

1.Shortpresstoturnon,longpresstoturnoff;

2:Whenturnedoff,longpresstoentersetup;3:Inmodesetting,shortpresstochangeparameter;

1.Whenturnedon,longpresstoentercalibrationmode.2.Incalibrationmode,shortpresstoconfirmcalibration;3.Inmodesetting,shortpresstoconfirmparameterselection. Diagram-1

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3.CompleteKit

Thingsneededinadditiontowhat’sinthebox

Acleancup,distilledwater(8-16oz),andtissuepapersforrinsinganddryingthe

probe.

4.Calibration

4.1Ifit’sfirsttimeuseorthetesterhasn’tbeenusedforalongtime,poursome

pH4.00solutiontotheFilllineintheprobecap,soakprobeforabout15minutes

tohydratethepHsensor.

4.2Shortpress toturnon.Rinseindistilledwater;shakethemeterinthe

airandusetissuepapertodapoffexcesswater.

4.3Longpress toentercalibrationmode;Shortpress toexit.

4.4Inserttheprobeinthe7.00pHcalibrationsolution;Stirgently;

leaveittostand;Waitforthesmileyface toappearand

stayonthescreen(seeDiagram3);shortpress tocomplete

1stpointcalibration,testerreturnstomeasurementmode;

calibrationicon displaysonbuttonleftsideofthescreen.

4.5Rinseprobeindistilledwater.Longpress toentercalibration

mode;inserttheprobeinthepH4.00calibrationsolution,stirgently;leaveit

Diagram-2

Diagram-3

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tostand;waitforthesmileyface toappearandstayonthescreen;then

shortpress tocompletethe2ndpointcalibration,

testerreturnstomeasuringmode,calibrationicons displayon

bottomleftsideofLCD.

■ Notes

a) TesterwillautomaticallyrecognizepHbuffersolution,userscanchoose

calibrationpoints:1point,2points,or3points.Butthe1stpointcalibration

mustbeincalibrationsolutionof7.00pH,thenfollowedby2ndor3rdpoint

calibration.Fordetails,pleaserefertothefollowingtable:

CalibrationSolution CalibrationIndicationicon

RecommendedAccuracyandRange

1-pointCalibration 7.00pH Accuracy≥0.1pH

2-pointCalibration

7.00pHand4.00pH MeasuringRange<7.0pH

7.00pHand10.01pH MeasuringRange>7.0pH

3-pointCalibration

7.00pH,4.00pH and10.01pH

Widemeasuringrange

b) Automaticself-diagnosticinformation:ifmeasuredvalueisfarofftothe

presetrange,LCDwilldisplay“Er1”;Incalibrationmode,ifthemeasured

valuehasn`tbeenstable,i.e. hasnotbeenstayingonLCD,pressing

willcauseLCDtodisplay“Er2”.

5.Measurement

5.1Shortpress toturnonthetester.Rinseprobeindistilledwater,shake

themeterintheairanddapitwithtissuepapertoremoveexcesswater.

5.2Stirprobeinsamplesolutiongently,leaveittostand.Getreadingsafter

comesupandstays.

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■ Notes

n IfyouseesomewhitecrystallinesolidleakedoutofthepHprobe,that’sthereference

solution(3MKCL)insidetheprobe.ItisNOTasignofanydefectiveissue.Itisanormal

phenomenonwhentheprobeisstoreddryforaperiodoftime.Itprovesthatthe

junctionoftheprobeisworkingwell.Userscansimplyrinsetheprobeindistilledwater

toremovethesolidsandusethetesterasusual.

n Aftereachtest,usersshouldrinsethepHprobethoroughlywithdistilledwateror

purifiedwater.

n ForthepremixedpHcalibrationbuffersolutions,werecommendreplacingthemafter

10to15timesofusetokeepitsaccuracy.

n ThismeterwillNOTgiveaccurateorstablepHreadingswhentestingdistilledordeionizedwater.Thisisbecausedistilledordeionizedwaterdonothaveenoughionspresentfortheelectrodetofunctionproperly.Tomeasuredistilledordeionizedwater’spH,usersneedtouseaspecializedinstrument.Contactusatinfo@aperainst.comformoredetails.Whentestingpurifiedwaterlikespringwaterordrinkingwater,itwilltakelongerforthereadingstogetstabilized(typically3-5minutes)becausethereisveryfewionslefttobedetectedbythesensorinthosepurifiedwater.

n DoNOTstoreprobeinpurifiedwaterbecausethatwillcausepermanentdamagetothepHprobe.Purifiedwaterisonlyrecommendedforrinsingtheprobe.Theprobeshouldbestoredin3MKCLpHelectrodestoragesolution(SKUAI1120)forbestaccuracyorstoredinthepH4.00calibrationsolutionasanalternativeifstoragesolutionisnothandy.

n DoNOTuseanyotherbrand’sstoragesolutionsbecausedifferentchemicalsmaybeusedandpotentialpermanentdamagecouldbecausedtothemeter.

n StoringtheprobedrywillNOTcausepermanentdamagetoit.Itwillonlytemporarily

causetheprobetoloseitssensitivity,whichcanalwaysberestoredbysoakinginthestoragesolutionorpH4.00calibrationsolution.

6.ParameterSetting

6.1SettingSchedule

Prompt

MarkParameterSettingItems Code

Factory

Default

P1 SelectpHbuffer USA–NIST USA

P2 SelectTemperatureUnit ˚F–˚C ˚F

P3 BacktoFactoryDefault No–Yes No

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6.2ParameterSetting

Whenturnedoff,longpress toentersetup → shortpress toswitch

P1-P2-P3→ Shortpress ,parameterflashing→shortpress tochoose,

shortpress toconfirmparameterselection→Longpress togobackto

measurementmode.

6.3ParameterSettingInstruction

SelectstandardpHbuffersolution(P1):Therearetwooptionsofstandardbuffer

solutions:USAseriesandNISTseriesasthefollowingchart:

IconspHstandardbuffersolutionseries

USAseries NISTseries

Three-Pointcalibration

1.68pHand4.00pH 1.68pHand4.01pH

7.00pH 6.86pH

10.01pHand12.45pH 9.18pHand12.45pH

6.4Fortheself-diagnosisinformation,pleaserefertothetablebelow:

Symbol Self-Diagnosis information How to fix

Wrong pH calibration solution, which exceeds the recognizable range of the meter.

1. Check if calibration solution is correct 2. Check if probe is damaged. 3. Check if there is any air bubble in the glass bulb sensor

Is pressed before measurement is stable ( appears and stays)

Wait for the smile icon to appear and stay, then press

* If you find any air bubble in the glass bulb of the pH sensor, simply shake the probe for a few times to remove it. The existence of an air bubble in the glass bulb will significantly decrease the accuracy of measurement.

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* The 1st point calibration must be 7.00 pH. Perform the 2nd point calibration (4.00 pH) immediately after the 1st point. Do NOT turn off the meter before you conduct 2nd point calibration. If the meter is turned off after 1st point calibration, users will need to restart the calibration process with the 7.00 pH and the 4.00 pH following after. Calibrating directly in pH 4.00 after turning meter off and back on will cause Er1.

7.TechnicalSpecifications

8.TesterFunctions

8.1Calibrationpointsindication:

8.2StableMeasurement: appearsandstaysonthescreen

8.3Self-Diagnosticinformation:Er1,Er2

8.4Low-Voltagewarning: flashes,reminderofbatteryreplacement

8.5AutoPower-Offin8minutesifnooperation.

Gotosupport.aperainst.comtofindtutorialvideosandFAQarticles,orsubmita

ticketifyouhaveanyquestionsregardingtheusingmeter.

pH

Range 0-14.0pH

Resolution 0.1pH

Accuracy ±0.1pH

CalibrationPoints 1-3points

AutomaticTemperatureCompensation 0–50˚C(0–122˚F)

Temp.

Range 0–50˚C(0–122˚F)

Resolution 0.1˚C

Accuracy ±0.5˚C

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9.Warranty

Wewarrantthisinstrumenttobefreefromdefectsinmaterialandworkmanship

andagreetorepairorreplacefreeofcharge,atoptionofAPERAINSTRUMENTS,

LLC,anymalfunctionedordamagedproductattributabletoresponsibilityofAPERA

INSTRUMENTS,LLCforaperiodofTWOYEARS(SIXMONTHSfortheprobe)fromthe

delivery.

Thislimitedwarrantydoesnotcoveranydamagesdueto:

Transportation,storage,improperuse,failuretofollowtheproductinstructionsor

toperformanypreventivemaintenance,modifications,combinationorusewithany

products,materials,processes,systemsorothermatternotprovidedorauthorized

inwritingbyus,unauthorizedrepair,normalwearandtear,orexternalcausessuch

asaccidents,abuse,orotheractionsoreventsbeyondourreasonablecontrol.

APERA INSTRUMENTS, LLC Address:6656BuschBlvd,ColumbusOhio43229

Tel:1-614-285-3080

Email:info@aperainst.com

Website:www.aperainst.com