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temperaturevalue,

2) Pressthe"Cal/Enter"keytoenterthecalibrationstate,andlongpressthe"Mesa/Del"keytoswitchtomanual

identificationmodeanddisplaytheword"Non",

3) PresstheupanddownkeytosetthenominalpHvalueatthecurrenttemperature,

4) If the meter is not connected to the temperature electrode, press the "Setting" key and set the current

temperaturevaluebypressingtheupanddownkey,andpressthe"Enter"keytocompletethetemperaturevalue

input,

5) Afterthedataisstable,pressthe"Enter"keytocompletethecalibration.

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Standardbuffersolutionsareusuallyobtainedintwoways,userscanprepareorpurchasestandardsolutionsby

themselves

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Customized:PleaserefertoappendixtopreparepHstandardbuffer

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Purchase standard buffers: Users can also directly purchase certified standard buffers produced by professional

manufacturers,veryconvenient.Inordertofacilitatetheuseofusersandreducealotofworkforuserstoprepare

standard solutions, our companyproducesandpreparespHstandardbuffer solutions, which users can purchase

directly.Itisveryconvenienttocalibratetheelectrodewithastandardsolutionbeforemeasurement.

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5.5 Measurement

5.5.1Measurementpreparation

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Before measurement, the user should understand the properties and attributesofthesubstance(sample)tobe

measured;themethodofroutinetesting; know the basic operationandapplicationofthemeter;knowtheuseand

maintenanceofconventionalelectrodes.

Theuserneedstopreparethesamplefirst,orthestandardsolutionthatneedstore‐calibratetheelectrode,etc.

5.5.2 Measurement

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AfterpHelectrodecalibration,pHvalueandpotentialvalueofthesolutioncanbenormallymeasured

Themetersupportstworeadingmodes:continuousmeasurementmodeandbalanced measurement mode. If it isa

balancedreadingmode,afterthedataisstable,themeterwillautomaticallylockthemeasurementresults(thelocksignwill

be displayed, and the measurement results will not change); the user can press the "measure" key to start the next

measurement.IfyouneedtocontinuouslymonitorthepHvalueandmVvalueofthesolution,youshouldusethecontinuous

measurementmode.

Themeasurementstepsareasfollows(forreference):

1) Immersetheelectrodeinthesolutiontobemeasured,

2) Iftheinstrumentisnotconnectedtoatemperatureelectrode,useathermometertomeasurethetemperature

valueofthecurrentsolution,andthenmanuallysetthetemperaturevalue,

3) Waitforthedatatostabilize,andthenreadthemeasurementresults,

4) Inthemeasurementstate,pressthemodekey"mV/pH"toswitchthemVvalueorpHvaluedisplay,

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