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14 InPro 4550 VP pH electrode
InPro 4550 VP pH electrode © 04 / 16 Mettler-Toledo GmbH
52 002 400 Printed in Switzerland
1 Introduction ...................................................................15
2 Safetyinstructions ..........................................................15
3 Productdescription ......................................................... 15
4 Installationandcommissioning .......................................16
5 Cabling ..........................................................................16
6 Calibrationandmeasurement ..........................................16
7 Maintenance ..................................................................16
8 Diagnostics....................................................................17
9 Trouble-shooting(sluggishresponsetime,
insufcientsensitivity) ....................................................17
10 Disposal ........................................................................17
11 Guarantee ......................................................................17
Contents
en
InPro
4550 VP
pH Electrode
Instruction Manual
InProandXerolytareregisteredtrademarks
ofMettler-ToledoGmbHinSwitzerland,theUSA,
theEuropeanUnionandafurthervecountries.
en Instruction Manual
InPro 4550 VP pH electrode 15
© 04 / 16 Mettler-Toledo GmbH InPro 4550 VP pH electrode
Printed in Switzerland 52 002 400
1 Introduction
TheMETTLERTOLEDOelectrodeversionsInPro
®
4550 VP
are low-maintenance, temperature-compensated pH
combination electrodes containing polymer electrolyte
(Xerolyt
®
Plus). An integrated temperature sensor (RTD)
providesautomatic compensation of the electrode slope
toensureaccuratereadings.
The InPro 4550VP electrodes are suitable for pH
measurementsin:
–emulsionsandsuspensions
–sulde-bearingmedia
–solutions containing heavy metals (lead, mercury,
silver,etc.)
–processes with rapid pressure uctuations (within
thegivenrange)
–heavilycontaminatedmedia.
The InPro 4550VP electrodes are unsuitable for
sterilization/autoclaving procedures, for processes with
rapid temperature uctuations or food and beverage
applications.
Pleasereadthroughtheseoperatinginstructionscarefully
before commissioning, in order to ensure trouble-free
use.Thesegeneralinstructionsmustbereadilyavailable
tooperatorsoftheelectrodeatalltimes.
2 Safetyinstructions
TheInPro4550VPelectrodesareintendedsolelyforthe
purposedescribedin§1above.Theelectrodesconsistpartly
ofglassandshouldbehandledcarefully.Iftheelectrodeis
tobecleanedorcalibratedusingacidoralkalinesolutions,
safetygogglesandglovesshouldbeworn.Localsafety
regulationsareapplicabletothehandlingoftheelectrode.
We recommend that you only operate the electrode in
combination with original parts from METTLER TOLEDO.
Operationandmaintenanceshouldbecarriedoutonlyby
trainedpersonnelandstaffwhohavereadandunderstood
theoperatinginstructions.
3 Product description
The inscription on eachelectrode contains the following
information:
METTLER TOLEDO Manufactureroftheelectrode
InPro
®
4550 VP / xxx / SG ypedesignation/xxx=typeof
temperaturesensor(Pt100/
Pt1000)/SG=ancillaryelectrode
combinationpH Typeofelectrode
pH 0 … 14 pHmeasurementrange
0…130°C Temperaturerangeforoperation
Order No. 52 002 40X Ordernumber
SEV14ATEX0168X
Identicationandnumber
ofcerticate
IECExSEV14.0025X
Identicationandnumber
ofcerticate
IS/I,II,III/1/ABCDEFG/T6 FMapproved
Seeinstructionmanual! Instruction(Observetheoperating
instructions)
Inadditioneachelectrodeisallocatedaserialnumberon
theplug-inheadtoenableidentication.
en
16 InPro 4550 VP pH electrode
InPro 4550 VP pH electrode © 04 / 16 Mettler-Toledo GmbH
52 002 400 Printed in Switzerland
4 Installation and commissioning
1. Onunpacking,andagainpriortoinstallation,checkthe
electrodevisuallyforsignsofmechanicaldamagetothe
glassmembrane,theshaftandtheconnector.Report
any faults or defects immediately to your authorized
METTLERTOLEDOdealer.
2. Removethewateringcapandrinsetheelectrodewith
distilledordeionizedwater.Useonlysofttissuetodab
theelectrodedry.Donotrubtheglassmembranesince
this can lead to sluggish response behavior of the
electrode.
3. Electrodes with a dry glass membrane must be
conditioned forseveralhoursina3mol KClsolution
before being used.
4. Connectalwaysthesolutionground(bluecable)tothe
transmitter.
5. UsePTFEtapetosealtheNPTthread.
6. If possible use the protection sleeve (order no.
52401808).
5 Cabling
TheInPro4550VPisequippedwithaVarioPinconnector.
Toconnect thecable totheelectrode,attachandgently
rotateuntiltheconnectorisengaged(groove).Screwthe
cablecap nut onto the electrode until the connection is
secure. The plug assembly should be tted hand-tight
only; no tools should be used. For details of the exact
assignmentoftheindividualcableleadstotheVPpins,
please refer to the instruction leaet “Preparation of the
cableforconnectiontothetransmitter”suppliedtogether
withthecable.
6 Calibration and measurement
InPro 4550VP electrodes require two-point calibration.
Before calibration, the watering cap must be removed
from the pH electrode. The electrode is then dipped
successively into two different buffer solutions, each of
knownpHvalue,andthe transmittercalibratedtothese
buffervalues(forexample,bufferspH4.01andpH7.00).
Pleasenotetheinstructionsgivenintheoperatingmanual
ofthetransmitter.Calibrationshouldberepeatedasand
whenneeded.
7 Maintenance
–ElectrodeswithXerolyt
Pluspolymerelectrolytecannot
berelled.
–Electrodes shouldnotbe storeddryfor any periodof
time.
–Duringstorage,thewateringcap should beinplace,
lledwithFriscolyt™or3molKClsolution.
–Neverstoreanelectrodeindistilledordeionizedwater,
asthisshortensthelifetimeoftheelectrode.
–Shouldtheelectrodedryout,itmustbeconditionedfor
24hoursinFriscolyt(orderingno.51340053for250
ml,or51340054for63250ml)beforereuse.After
conditioning,recalibrationisrequired.
–Aftereachworkcycle,thetipoftheelectrodeshouldbe
cleanedusingdeionizedwater.
en
InPro 4550 VP pH electrode 17
© 04 / 16 Mettler-Toledo GmbH InPro 4550 VP pH electrode
Printed in Switzerland 52 002 400
Attention! Do notunderanycircumstanceuseMETTLER
TOLEDOreactivatingsolution(orderingno.51319053/in
USA439895125)asthiscontainshydrouoricacid(HF)
whichwouldattacktheXerolytreferencesystem.
8 Diagnostics
Theelectrodesareequippedwithagroundingringwhich
allows a diagnostic of the diaphragm condition. If this
diaphragm (open junction) should become clogged or
if the reference resistance exceeds a certain value (see
transmitter operation manual), it is then necessary to
replacetheelectrode.InPro4550VPelectrodesshouldasa
generalrulenotbecleanedwithacidiccleaningsolutions,
e.g.diaphragmcleaningsolution,reactivationsolution,etc.
However,byextremelycarefulapplication,itispossibleto
reactivatetheglassmembrane,seepoint9below.
9 Trouble-shooting(sluggishresponsetime,
insufcientsensitivity)
Attention! Theglassmembranemustbeverycautiously
dabbedwith HF solutionusinganebrush andtaking
care that solution does not come into contact with the
titanium pin (metallic solution ground). Also check the
electrodeconnector(VP)forpossibletracesofmoisture.
Ifnecessary,cleanwellusingdeionizedwateroralcohol,
andafterwardsdrycarefully.
10 Disposal
DisposeofInPro4550VPelectrodesinaccordancewith
local or state regulations.
11 Guarantee
Onmanufacturingdefects,12monthsafterdelivery.
en
74 InPro 4550 VP pH electrode
InPro 4550 VP pH electrode © 04 / 16 Mettler-Toledo GmbH
52 002 400 Printed in Switzerland
–
Notes
InPro 4550 VP pH electrode 75
© 04 / 16 Mettler-Toledo GmbH InPro 4550 VP pH electrode
Printed in Switzerland 52 002 400
–
Notes
Brazil Mettler-Toledo Ind. e Com. Ltda.
AvenidaTamboré,418–Tamboré,
BR-06460-000Barueri/SP,Brazil
Phone+551141667400
e-mailmettler@mettler.com.br;service@mettler.com.br
France Mettler-ToledoAnalyseIndustrielleS.A.S.
30,Bld.deDouaumont,FR-75017Paris,France
Phone+33147370600
e-mailmtpro-f@mt.com
Germany Mettler-ToledoGmbH
Prozeßanalytik,Ockerweg3,DE-35396Gießen
Phone+49641507-444
e-mailprozess@mt.com
Switzerland Mettler-Toledo(Schweiz)GmbH
ImLangacher,CH-8606Greifensee
Phone+41449444760
e-mailProSupport.ch@mt.com
United States METTLER TOLEDO
ProcessAnalytics
900MiddlesexTurnpike,Bld.8,Billerica,MA01821,USA
Phone+17813018800
Freephone+18003528763(onlyUSA)
e-mailmtprous@mt.com
FormoreaddressesofMETTLERTOLEDOMarketOrganizationspleasegoto:
www.mt.com/pro-MOs
Mettler-ToledoGmbH,ProcessAnalytics,ImHackacker15,CH-8902Urdorf
Phone+41447296211,Fax+41447296636
Subjecttotechnicalchanges
04/2016©Mettler-ToledoGmbH
PrintedinSwitzerland.52002400
www.mt.com/pro
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