Extech Instruments EC170

6 EC170-EU-EN V1.1 7/13
MeasurementPreparations,Notes,andConsiderations
 Accuracyisgivenas%full‐scale;thereforeusingthelowestrangewillyieldthebest
accuracy.
 Themeter’sdisplaywillindicateE02orE03ifthemeasuredvalueisbelow(E02)orabove
(E03)specifiedlimitsofthemeter.Ifthisoccurs,pleaseselectanotherrangeasdescribed
in
theManualRangediscussioninpreviousparagraph.
 Thetemperaturecoefficientisfixedandcannotbeadjusted.
 Thenormalization(reference)temperatureisfixed(25
o
C);thenominalvalueiscorrectfor
mostapplications.
 Rinsetheprobewithdeionizedordistilledwaterbeforeusetoremoveimpuritiesthatmay
adheretotheelectrode.Whenthemeterhasbeenidleforalongperiod,soaktheelectrode
foratleast30minutesbeforeuse.
 Whendippingtheprobeintoasamplesolution,besuretoeliminateairbubblestrappedin
theprobe’sslot.Toremoveairbubbles,givetheprobeagentlestirwhilesubmergedinthe
solution.
 Whentakingameasurement,stirtheprobegentlyinthesampletocreateahomogenous
sample.
Allowafewsecondstoelapsefortheprobeandthesampletoreachtemperature
equilibrium.Ideally,wait15minutestoachievemaximumaccuracyandbesttemperature
compensation.
 Theunitofmeasureiconwillflashonthemeter’sdisplaywhilestabilizationistakingplacein
measurementmode.Whenstabilizationisachieved,themeter’siconwillstopflashing.
 PresstheHOLDbutton tofreezeadisplayedreading.Pressagaintoreleasethedisplay.
SalinityMeasurement
1. ReadtheMeasurementPreparationsectionabovebeforecontinuing.
2. Inserttheelectrodeintothesampleensuringthattheelectrodesarecompletelysubmersed.
3. Slowlystirthesolutionwiththeelectrodetoremoveairbubbles.
4. ThemeterusestheAuto‐rangeutilitytofindtheproperrangeandthendisplays
thesalinity
readingatthecenteroftheLCDwiththetemperaturereadingshownonthelowerLCDarea
insmallerdigits.
FinishingaMeasurementSession
Afterameasurementsession:
 Rinsetheelectrodeindeionizedordistilledwaterandstoredry.
 Affixtheprotectivecapovertheelectrodewhenstoring.
 Iftheunitistobeleftun‐unusedforlongperiods,removeandstorethebatteriesseparately.
AutomaticPowerOFF(Sleepmode)
ThemeterwillautomaticallyswitchOFFafter20minutesofinactivity.TodisabletheSleep
Mode:Withtheinstrumentswitchedoff,pressandholdtheSETandHLD/CALbuttons
simultaneouslyuntilthe‘n’iconappearsonthedisplay.Releasethebuttonsandthemeterwill
powerup.ThemeterwillnowstayswitchedONuntiltheusermanuallyswitchesitOFF.The
meterrevertstothe‘SleepModeactive’stateeachtimeitispowereddown.
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