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  3. Type 405-DPAS-SC-VP pre-pressurized gel-reference pH Electrode

Mettler Toledo Type 405-DPAS-SC-VP pre-pressurized gel-reference pH Electrode, 405-DPAS-SC-VP User manual

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8 405-DPAS-SC-VP pH Electrodes
© 04 / 16 Mettler-Toledo GmbH 405-DPAS-SC-VP pH Electrodes
53 500 197 Printed in Switzerland
1 Introduction
TheMETTLERTOLEDOType405-DPAS-SC-VPcombination
pH electrode is a low-maintenance, pre-pressurized,
autoclavable electrode with a gel-type reference and
aVarioPin(VP)connector.Thereferenceelementincorporates
asilver-iontraptopreventsilversuldecontaminationof
thereferencejunction.
2 Preparation
Afterunpacking,examinetheelectrodeforanymechanical
damage.
METTLERTOLEDO electrodes are factory tested and are
shippedready-to-use.(Tomaintainfactorypressurization,
theType405-DPAS-SC-VPelectrodeshaveasiliconeseal
coveringtheceramicdiaphragm;thismustberemovedwith
theenclosedbladepriortouse.)Removethehydrationcap
andremoveanyelectrolytecrystalsbyrinsingtheelectrode
withdistilledwater.Patdry;donotrubasthismaybuildup
astaticchargeandlengthentheresponsetime.
Eliminateanyairbubblesaroundtheinternalelementinthe
pH-sensitive membrane.
3 Operation
METTLERTOLEDO pH electrodes can be used with most
pH/mVmeters.Followmanufacturer’sinstructionsforuse.
Atwo-pointcalibrationisrecommended,usingfreshbuffers
ofknownpHvalueswhichbracketthesamplepH;onebuffer
shouldbeclosetopH7tosetthezeropoint.Forfastroutine
analysis,astandardizationusingonebufferatavaluenear
thesamplepHcanbedone.
4 Sterilization
Type 405-DPAS-SC-VP electrodes are steam-sterilizable
in-situandauto-clavable.Followoperatinginstructionsfor
theautoclave.Itisnotnecessarytouseaprotectivecapon
theconnectorwhenautoclaving.
Repeatedsterilizationmaycausetheelectrolytetodiscolor
slightlyduetotheelevatedtemperatures.Thisdoesnotaffect
theelectrodeperformance.
5 Maintenance
When properly cared for, METTLER TOLEDO electrodes
shouldprovideaccurateresultsoverthousandsofuses.
Storage:Electrodesshouldberinsedthoroughlyafteruse
andstoredin3MKClorpH4buffersolutionwithaddedKCl.
DONOTstoretheelectrodedryorindistilledortapwater.
Iftheelectrodehasbeenstoreddryorinwater,itmustbe
reconditionedbysoakingin3MKClforseveralhours.
Relling: Type 405-DPAS-SC-VP gel-reference electrodes
arenotrellable.
Protein Contamination:CleantheelectrodewithpHElectrode
CleanerforProteinsfollowinginstructionsonthebottle.
Reactivating pH membrane: Use Reactivating Solution
followingdirectionsCAREFULLY.
en
en Instruction manual
Instructions for Type 405-DPAS-SC-VP
pre-pressurized gel-reference pH Electrodes
405-DPAS-SC-VP pH Electrodes 9
405-DPAS-SC-VP pH Electrodes © 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland 53 500 197
en
Servicing a clogged or dry reference junction: Immerse
theelectrodeinabeakerof3MKCl.Heatthe solutionto
approximately70°C(160°F)andallowelectrodetosoak
inthissolutionasitcoolstoroomtemperature.
6 Troubleshooting
No response (symptom)
– Poor meter connection
 Checkconnectorsatthemeter
andattheelectrode
– Cracked glass
Replaceelectrode
Slow response (symptom)
–DehydratedpHmembrane
Rehydrate(seeMaintenance)
–Cloggedreferencejunction
SoakinwarmKCl(seeMaintenance)
– Protein contamination
UsepHElectrodeCleaner(see
Maintenance)
–Depletedgellayer
UseReactivatingSolution(see
Maintenance)
Noise (symptom)
– Poor meter connection
Checkconnector
–Cloggedreferencejunction
SoakinwarmKCI(seeMaintenance)
Low slope (symptom)
–DehydratedpHmembrane
Rehydrate(seeMaintenance)
– Contaminated membrane
UsepHelectrodecleaner(see
Maintenance)
Forfurtherassistance,callourCustomerServiceCenterat
+1-800-352-8763.
38 405-DPAS-SC-VP pH Electrodes
© 04 / 16 Mettler-Toledo GmbH 405-DPAS-SC-VP pH Electrodes
53 500 197 Printed in Switzerland
–
Notes
405-DPAS-SC-VP pH Electrodes 39
405-DPAS-SC-VP pH Electrodes © 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland 53 500 197
–
Notes
Brazil Mettler-Toledo Ind. e Com. Ltda.
AvenidaTamboré,418–Tamboré,
BR-06460-000Barueri/SP,Brazil
Phone+551141667400
e-mailmettler@mettler.com.br;service@mettler.com.br
France Mettler-Toledo Analyse Industrielle S.A.S.
30,Bld.deDouaumont,FR-75017Paris,France
Phone+33147370600
e-mail mtpro-f@mt.com
Germany Mettler-Toledo GmbH
Prozeßanalytik,Ockerweg3,DE-35396Gießen
Phone+49641507-444
e-mail prozess@mt.com
Switzerland Mettler-Toledo (Schweiz) GmbH
ImLangacher,CH-8606Greifensee
Phone+41449444760
e-mailProSupport.ch@mt.com
United States METTLER TOLEDO
ProcessAnalytics
900MiddlesexTurnpike,Bld.8,Billerica,MA01821,USA
Phone+17813018800
Freephone+18003528763(onlyUSA)
e-mail mtprous@mt.com
FormoreaddressesofMETTLERTOLEDOMarketOrganizationspleasegoto:
www.mt.com/pro-MOs
Mettler-ToledoGmbH,ProcessAnalytics,ImHackacker15,CH-8902Urdorf
Phone+41447296211,Fax+41447296636
Subjecttotechnicalchanges
04/2016©Mettler-ToledoGmbH
PrintedinSwitzerland.53500197 www.mt.com/pro
Addresses | Impressum
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