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405-DPAS-SC pH Electrodes
53 500 085
Instruction Manual
Type 405-DPAS-SC
pre-pressurized
gel-reference
pH Electrodes
cs Návod k obsluze 2
da Brugsanvisning 4
de Betriebsanleitung 6
en Instruction manual 8
es Manual de instrucciones 10
fr Instructions d’utilisation 12
Käyttöohje 14
hu Használatiutasítás 16
it Istruzioni per l‘uso 18
ja 20
ko 22
nl Gebruikershandleiding 24
pl Instrukcjaobsługi 26
pt Manual de instruções 28
ru Инструкция по эксплуатации 30
sv Bruksanvisning 32
th ค ู่ม ือคำ�แนะนำ� 34
zh 36
8 405-DPAS-SC pH Electrodes
© 04 / 16 Mettler-Toledo GmbH 405-DPAS-SC pH Electrodes
53 500 085 Printed in Switzerland
1 Introduction
The METTLER TOLEDO Type 405-DPAS-SC combination
pH electrode is a low-maintenance, pre-pressurized,
autoclavable electrode with a gel-type reference. The
reference element incorporates a silver-ion trap to prevent
silversuldecontaminationof the reference junction. The
gel-typereferenceisalsoavailableinacombinationORP
and as a separate reference electrode
2 Preparation
Afterunpacking,examinetheelectrodeforanymechanical
damage.
METTLER TOLEDO electrodes are factory tested and are
shippedready-to-use.(Tomaintainfactorypressurization,
the Type 405-DPAS-SC electrodes have a silicone seal
coveringtheceramicdiaphragm;thismustberemovedwith
theenclosedbladepriortouse.)Removethehydrationcap
andremoveanyelectrolytecrystalsbyrinsingtheelectrode
withdistilledwater.Patdry;donotrubasthismaybuildup
astaticchargeandlengthentheresponsetime.
Eliminateanyairbubblesaroundtheinternalelementinthe
pH-sensitivemembrane.
3 Operation
METTLERTOLEDOpHelectrodescanbeusedwithmostpH/
mVmeters.
Followmanufacturer’sinstructionsforuse.
Atwo-pointcalibrationisrecommended,usingfreshbuffers
ofknownpHvalueswhichbracketthesamplepH;onebuffer
shouldbeclosetopH7tosetthezeropoint.Forfastroutine
analysis,astandardizationusingonebufferatavaluenear
thesamplepHcanbedone.
4 Sterilization
Type 405-DPAS-SC electrodes are steam-sterilizable in-
situandautoclavable.Followoperatinginstructionsforthe
autoclave. It is advisable(but notnecessary) toput the
closurecap(p/n002011096)ontheconnectorpriorto
autoclaving.
Repeatedsterilizationmaycausetheelectrolytetodiscolor
slightlyduetotheelevatedtemperatures.Thisdoesnotaffect
theelectrodeperformance.
5 Maintenance
When properly cared for, METTLER TOLEDO electrodes
shouldprovideaccurateresultsoverthousandsofuses.
Storage:Electrodesshouldberinsedthoroughlyafteruse
andstoredin3MKClorpH4buffersolutionwithaddedKCl.
DONOTstoretheelectrodedryorindistilledortapwater;
thisdehydratesthepHmembraneandtheelectrodemust
berehydratedbeforeusebyimmersingforseveralhoursin
3MKCl.
Relling:Type405-DPAS-SCgel-reference electrodes are
notrellable.
en
en Instruction manual
Instructions for Type 405-DPAS-SC
pre-pressurized gel-reference pH Electrodes
405-DPAS-SCpHElectrodes 9
405-DPAS-SC pH Electrodes © 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland 53 500 085
en
ProteinContamination:CleantheelectrodewithpHElectrode
CleanerforProteinsfollowinginstructionsonthebottle.
Reactivating pH membrane: Use Reactivating Solution
followingdirectionsCAREFULLY.
Servicingacloggedordryreferencejunction: Immerse
theelectrodeinabeakerof3MKCl.Heatthesolutionto
approximately70°C(160°F)andallowelectrodetosoak
inthissolutionasitcoolstoroomtemperature.
6 Troubleshooting
Noresponse(symptom)
– Poor meter connection
Checkconnectorsatthemeterandat
theelectrode
– Cracked glass
Replaceelectrode
Slowresponse(symptom)
–DehydratedpHmembrane
Rehydrate(seeMaintenance)
–Cloggedreferencejunction
SoakinwarmKCl(seeMaintenance)
– Protein contamination
UsepHElectrodeCleaner(see
Maintenance)
–Depletedgellayer
UseReactivatingSolution(see
Maintenance)
Noise(symptom)
– Poor meter connection
Checkconnector
–Cloggedreferencejunction
(Seeabove)
Lowslope(symptom)
–DehydratedpHmembrane
Rehydrate(seeMaintenance)
– Contaminated membrane
(Seeabove)
Forfurtherassistance,callourCustomerServiceCenterat
+1-800-352-8763.
38 405-DPAS-SC pH Electrodes
© 04 / 16 Mettler-Toledo GmbH 405-DPAS-SC pH Electrodes
53 500 085 Printed in Switzerland
–
Notes
405-DPAS-SCpHElectrodes 39
405-DPAS-SC pH Electrodes © 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland 53 500 085
–
Notes
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04/2016©Mettler-ToledoGmbH
PrintedinSwitzerland.53500085
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