Selecta PH-3005 - Calibration; Ph Electrode Calibration; Prepare Electrodes

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meanstodeletealldata,afterselecting,pressthe"Cal/Enter"keytodeletestoreddata.
 Inthemeasurementstate,longpressthe"Save/▼"keytoenterthefunctionofviewingstoredresults.
 Whenviewingnostoredresult,theinterfacedisplaysthecharacter"nuLL",whichmeansNullStoredResult.
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5.3.2.4 Automaticshutdownsettings
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Themeterprovidesautoshutdownfunction.Whenthemeterisnotusingandsettheautoshutdown,themeter
switchesoffautomatically.Therearesixoptions:off,300Sec,600Sec,1200Sec,1800Sec,and3600Sec.
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5.3.2.5 Resetsettings
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Whenthemeterisnotworking.Userscanresetthemeterfromthedefault’sbackup.Thedefaultsettingincludesthe
electrodeslopeas100%,thetemperatureas25.0°C,continuousreadingmode,automaticshutdownascloseetc.Alldata
willbedeletedafterresetting.
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5.4 Calibration
5.4.1 Prepareelectrodes
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BeforeusingthepHelectrode,pleasepayattentiontothefollowingitems:
 PullouttheelectrodeprotectioncapatthebottomendofthepHelectrode,andpulldowntherubbersleeveat
theupperendoftheelectrodetoexposethesmallholeattheupperend.
 Cleantheelectrodeswithdistilledwater.
 FordetailsontheuseandstorageofthepHelectrode,pleaserefertotheelectrodeinstructionmanual.
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5.4.2 pHelectrodeCalibration
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ThepHelectrodehasacertaindriftindifferentuseenvironmentsorwhenithasnotbeenusedforalongtime,
resultingindifferentelectrodeslopesandzeropoints.Itneedstobere‐calibratedwithastandardbuffersolution.
Iftheuserneedstoperformmulti‐pointcalibration,multiplestandardsolutionsmustbepreparedinadvance.Ifonly
one‐pointcalibrationisrequired,onlyonestandardbuffersolutionisrequired.
One‐point calibrationis suitable for the situation where the measurement accuracy is not high. At this time, the
percentageslopeoftheelectrodeistakenas100%.Two‐pointormulti‐pointcalibrationisusuallyusedtoimprovepH
measurementaccuracy.
Generally,whenthemeterisusedcontinuously,itisrecommendedtocalibrateonceaday.
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