Hanna Instruments HI 5315 User manual

HI 5315HI 5315

HI 5315

Reference Electrode

Instruction Manual

HI 5315

REFERENCE

HI5315ReferenceElectrodeHI5315ReferenceElectrode

HI5315ReferenceElectrode

I.I.

I. IntroductionIntroduction

IntroductionIntroduction

Introduction

The Hanna HI 5315 reference electrode is a silver-silver

chloridedoublejunctionhalf-celldesignedforuse withion

selectiveelectrodesorpHsensors. Theelectrodeutilizesa

quickflushsleevedesign.Theexternalreferenceelectrolyte

chamber is refillable. The internal chamber is a perma-

nentlyfilled,gelstabilized,chloridecontainingelectrolyte.

IIII

II. SpecificationsSpecifications

SpecificationsSpecifications

Specifications

Type: Ag/AgCl

Operating Temperature: 0-85°C

Operating pH: 0to14pH

Dimensions: 12mm(OD)x120mm

insertion(0.47”x4.72”)

Connection: Banana Plug

WettedMaterials: PEI

E°SHE (calculated): 0.238V

III.III.

III. Theory of operationTheory of operation

Theory of operationTheory of operation

Theory of operation

Areferencehalf-cellprovidestheelectrolyticcontactneces-

sarytopermitavoltagegradienttobemeasuredacrossa

measurementmembrane,suchasanISE. AAg/AgClelec-

trode is the most common type of reference. The Nernst

expressionforthistypehalf-cellisexpressedintheequa-

tion below. Note that the potential is a function of the

chlorideconcentration.

E=EoAgCl -0.059log[Cl--

Achlorideelectrolytecompletestheelectricalcircuitinthe

innerhalf-cell. Abridgeelectrolyteisusedasabufferzone

betweentheinnerhalf-cellandthesample.Asmallstable

liquidjunctionvoltageisgeneratedwherethesampleand

electrolyte come into contact.The size of this voltage,the

identityofthediffusingionsandhowthisbarrierisformed

dictate stability. The barrier zone for this reference is a

narrow ring shaped opening formed between the outer

sleeveandtheloweredgeoftheskirtshapedinnerbody.

IVIV

IV.....HI 5315 design elementsHI 5315 design elements

HI 5315 design elementsHI 5315 design elements

HI 5315 design elements

V.V.

V. Reference Fill SolutionsReference Fill Solutions

Reference Fill SolutionsReference Fill Solutions

Reference Fill Solutions

The fillsolutionusedintheexternalelectrolytechamberof

this electrode is replaceable. Table 1 lists Hanna‘s ion

selectiveelectrode(ISE)offering alongwiththerecommeded

fill solutions used when making an ion measurement. A

bottleofthissolutionisprovidedwiththeISEwhenshipped.

The fillsolutions listed will notinterferewith the sensing

electrodeorreactwiththesample.Theyareformulatedto

minimize liquid junction potentials and to produce the

moststableand reproducibleelectrodepotential. ThThwb

Verify you are using the correct fill solution with your

electrode.ab

Upper Cap

Spring

O-Ring

Ceramic Junction

on Inner Stem

Fill Hole

O-Ring and

Plug

Liquid junction

d reproducible potential.

VI.VI.

VI. Electrode Preparation:Electrode Preparation:

Electrode Preparation:Electrode Preparation:

Electrode Preparation:

1. RemovetheParafilm® seal wrappedovertheceramic

junctiononinnerstemanddiscard.Thisisonlyused

forshipping and long termstorage.

2. Rinseinnerbodywithdeionizedwatermakingcertain

toweto-ringfoundontheinnerstem.

1ELBAT1ELBAT 1ELBAT 1ELBAT1ELBAT

edoCnoitpircseDnoituloSlliF

2004IHllec-flahedimorBIH2707

3004IHllec-flahmuimdaCIH2707

4004IHllec-flahmuiclaCIH2807

7004IHllec-flahedirolhCIH2707

8004IHllec-flahcirpuCIH2707

9004IHllec-flahedinayCIH2707

0104IHllec-flahediroulFIH5707

1104IHllec-flahedidoIIH2707

2104IHllec-flahetafluS/daeLIH2707

3104IHllec-flahetartiNIH8707

4104IHllec-flahmuissatoPIH6707

5104IHllec-flahedifluS/revliSIH2707

Recommended Fill Solutions for ISERecommended Fill Solutions for ISE

Recommended Fill Solutions for ISE

Deionized

Water

Remove

Parafilm

Reassemble electrode by gently pushing the inner

assembly into the outer body (from the bottom).

Slide the spring and upper cap down the cable and

over the top of the inner stem. Screw the upper cap

into place.

4. Unscrewandremovethefillholeplugando-ringon

fillholespout.

Selecttheappropriatefillsolutionfrom Table1. Use

thedropperpipetteprovidedtoaddafewdropsoffill

solutiontotheelectrode.Invertelectrodetowettheo-

ringandrinse theelectrolytechamber.

6. Holding the body of the electrode gently press the

upper cap with your thumb. This permits the fill

solutiontodrainoutofthebody.Releaseyourthumb

and verify electrode returns to its original position.

(Youmayneedtogentlyassistforthistooccur).

7. Tightentheupperelectrodecapontothebodyandfill

electrode body until the fill solution volume is just

belowthefillhole.

8. Position the reference electrodewith appropriate ion

selectiveelectrode(ISE)inaHannaHI76404electrode

holder (or equivalent) and connect banana plug to

thereferencejackoftheISEmeter.

HI5315

REFERENCE

VII.VII.

VII. General GuidelinesGeneral Guidelines

General GuidelinesGeneral Guidelines

General Guidelines

•During measurement always operate electrode with

thefillholeopen.

•Verifyprotectivecaphasbeenremoved.

•Duringnormaluse,fillsolution will slowlydrainout

of the tapered cone junction at the bottom of the

electrode.Excessiveloss(>4cmdropwithin24hours)

is not normal. If this occurs verify the upper cap is

tightenedandtheinterfacebetweentheinternalcone

andouterbodyisfreeofdebris.

•Add fill solution daily to maintain a good head

pressure.Foroptimum reference response, this level

should be maintained and not be allowed to drop

morethan2-3cm(1-inch)belowfillhole.

•Whenchangingfromonefillsolutiontoanother,drain

1st fill solution, rinse with an aliquot of the new

solution,drain,thenrefillwithnewfillsolution.

•Components found in the fill solutions should not

interferewiththeionbeingmeasured.Verifythecorrect

solution is being used.

•Donotuseanelectrodeifcrystallizedsaltsarevisible

insidetheelectrode.Drainelectrode,disassembleand

rinseinternalbodywithdeionizedwater.Reassemble

andrefillwithfreshfillsolution.

•Ifanerraticmeasurementoccurs,checktoseeifforeign

matterisseentrappedneartheinternalcone. Drain

andrefillwithfreshfillsolution.

•Theinternalchamberofthiselectrodeisgelfilled.If

theelectrodehasbeenleftdryforlongperiodsoftime

thegelmaybedehydratedgivingunstablereadings.

Disassembleelectrodeandsoakinternalassemblyin

HI 7075 fill solution. Verify the ceramic junction is

wetted by the fill solution. Warming the solution

slightly (50°C) before soaking it will hasten this

process.Permittheelectrodetocoolcompletelywhile

immersedinthis solution.

VIII.VIII.

VIII.Disassembly - AssemblyDisassembly - Assembly

Disassembly - AssemblyDisassembly - Assembly

Disassembly - Assembly

Disassembly is normally not required or recommended. If

crystals or other matter are seen between outer body and

innercone,theelectrodemaybedisassembledforcleaning

or inspection. Protect the cone surface from oils or dirt by

usingglovesorlabtissues.

1. Drain fillsolutionfromelectrodebodybydepressing

the uppercapwhileholdingthe outer body.

2. Rinse inner body with deionized water and drain by

pressing the upper cap.

3. Unscrew upper cap and slide cap and spring up the

sensorcabletowardtheconnector.

4. Pushtheinnerbodythroughtheoutersleevebygently

pushingdown on the innerbodynear the threads.

5. Grasptheconeandgentlypullassemblyoutofsleeve.

6. Conemaybecleanedwithdeionizedwaterandasoft

labtissue(HI731318).

7. Cleanandinspectinternalsurfaceof outerbody.

8. Reassemble electrode by gently pushing the inner

stem assembly into the outer body, sliding spring

down cable, and screwing cap into place. (Refer to

SectionVI;ElectrodePreparation).

9. Refill electrolyte, flush junction, and then top off

electrolyte.

IXIX

IX. StorageStorage

StorageStorage

Storage

The HI 5315 reference electrode may be stored in air or

aqueoussolutionsbetweensamplemeasurements.

If the electrode will be used frequently and needs to be

readyforuse,takemeasurestopreventevaporationoffill

solution. Top off fill solution, replace o-ring and fill hole

plugonthefillholeopening,andplaceprotectivecapover

junction tip. Store electrode upright. Before using, flush

junctiononceandtopofffillsolution.

Forlongtermstorage,disassembleelectrodeandwashall

salts from assembly with deionized water. Wrap ceramic

junction on inner stem with Parafilm®or other sealing

film. Store dry and disassembled.

MAN5315 07/06REV4

WARRANTYWARRANTY

WARRANTY

Hanna Instruments ISE series electrodes are warranted to be free of

defectsinmaterialandworkmanshipfor6monthsfromdateofpurchase

when used for their intended purpose and maintained according to

instructions. If they fail to work when first used contact your dealer

immediately. Damage due to accidents, misuse, misapplication,

tamperingorlackofprescribedmaintenanceisnotcovered.

HannaInstrumentsreservestherighttomodifythedesign,construction

or appearance of its products without advance notice.

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