ms2100l corrtran aqua manual · the corrtran aqua is a compact, 4-20 ma corrosion transmitter used...

MS2100L Transmitter

Operator’s Manual

Metal Samples Company A Division of Alabama Specialty Products, Inc.

152 Metal Samples Rd., Munford, AL 36268 Phone: (256) 358-4202 Fax: (256) 358-4515

E-mail: [email protected] Internet: www.metalsamples.com

CorrTran AQUA Corrosion Monitor

Contents

1 SAFETY INSTRUCTIONS / DISCLAIMER ................................................................... 3

1.1 Designateduse.................................................................................................... 3

1.2 Installation,commissioning,andoperation.......................................................... 3

1.3 Operationalsafety................................................................................................ 3

1.4 Notesonsafetyconventionsandsymbols............................................................ 3

1.5 Disclaimer............................................................................................................. 4

2 IDENTIFICATION ........................................................................................................... 4

2.1 Devicedesignation............................................................................................... 4

2.2 Contentsofdelivery.............................................................................................. 6

2.3 Incomingacceptance,transport,storage............................................................. 6

2.4 Certificatesandapprovals.................................................................................... 6

2.5 Registeredtrademarks......................................................................................... 6

2.6 Patents................................................................................................................. 6

3 INSTALLATION AND MOUNTING ............................................................................... 7

3.1 Dimensions............................................................................................................ 7

3.2 Mountingsafetyproceduresandhints................................................................. 8

3.3 Installationinstructions....................................................................................... 124 STARTUP AND WIRING ............................................................................................. 14

4.1 Quickwiringguide.............................................................................................. 144.2 HARTintroduction.............................................................................................. 144.3 WiringwithHART............................................................................................... 144.4 Post-installationcheck........................................................................................ 15

5 HART MODEM ............................................................................................................ 165.1 HARTmodemintroduction.................................................................................. 165.2 LoadingUS-HI-321devicedrivers..................................................................... 16

6 CONFIGURING THE DISPLAY .................................................................................. 19

CorrTranMV EVALUATION TOOL .................................................................................... 207.1 CorrTranMVEvaluationToolintroduction......................................................... 207.2 EstablishingcommunicationwiththeCorrTranMVEvaluationTool.................. 207.3 CorrTranMVEvaluationToolcapabilities.......................................................... 22

8 TRANSFERING PROCESS DATA TO EXCEL .......................................................... 289 CHANGING OPERATING MODE TO REDUCE EXCITATION FREQUENCY ........... 3110 REPLACEMENT PARTS AND ACCESSORIES ........................................................ 32

10.1 CorrTranAQUAparts......................................................................................... 3210.2 Accessories........................................................................................................ 32

11 SYSTEM SPECS ......................................................................................................... 3312 TROUBLESHOOTING ................................................................................................ 3613 MEASURING PRINCIPLE ........................................................................................... 3814 APPENDIX ................................................................................................................... 40


3

1. SAFETY INSTRUCTIONS / DISCLAIMER1.1 Designated use TheCorrTranAQUAisacompact,4-20mAcorrosiontransmitterusedtodetectgeneralcorrosion,localizedcorrosion,andconductanceinthewaterqualityindustry.Thetransmittermeasuresthecorrosionrateandpittingfactor,givingthereadoutinmil/yearora0-1pittingfactor,respectively.Italsoprovidesaconductancemeasurement.Thereadingsaretakeninrealtimeandareupdatedapproximatelyevery34minutes.

1.2 Installation, commissioning, and operation CorrTranAQUAhasbeendesignedtooperatesafelyinaccordancewithrelevanttechnicalandsafetystandards.Ifinstalledincorrectlyorusedforapplicationsforwhichitisnotintended,application-relateddangersmayarise.Forthisreason,theinstrumentmustbeinstalled,connected,operated,andmaintainedaccordingtotheinstructionsinthismanualbyappropriatelytrainedpersonnel.Thismanualmustberead,understood,andtheinstructionsmustbefollowed.Modificationsandrepairstothedevicearepermissibleonlywhentheyareexpresslyapprovedinthismanual.

1.3 Operational safety CorrTran AQUA cannot be used in a hazardous (classified) area.

1.4 Notes on safety conventions and symbols Thefollowingconventionsareusedtohighlightsafety-relevantoralternateoperatingproceduresinthismanualandareshowninthemarginwhereappropriate.

Safety conventions

Symbol Meaning

Warning

Awarningsymbolhighlightsactionsorproceduresthat,ifnotperformedcorrectly,willleadtopersonalinjury,asafetyhazard,ordestructionoftheinstrument.

Attention

Anattentionsymbolhighlightsactionsorproceduresthat,ifnotperformedcorrectly,mayleadtopersonalinjuryorincorrectfunctioningoftheinstrument.

Note

Anotesymbolhighlightsactionsorproceduresthat,ifnotperformedcorrectly,mayindirectlyaffectoperationormayleadtoaninstrumentresponsewhichisnotplanned.

Aterminalsymbolindicatesthataprotectivegrounding(earth)terminalmustbeconnectedtoearthgroundpriortomakinganyotherconnectiontotheequipment.


4

1.5 Disclaimer Metal Samples has no power, nor does it undertake to police or enforce, compliance with the contents of this manual or observance of the safety precautions set forth herein. Metal Samples does not certify, test, or inspect the installations of CorrTran AQUA for safety or other purposes. Metal Samples disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or reliance upon this manual. Metal Samples makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published in this manual, and disclaims and makes no warranty that the information in this manual will fulfill any particular purposes or needs. Metal Samples only warranty is set forth in the written Limited Warranty specifically provided by Metal Samples in connection with the purchase of the CorrTran AQUA.

2. IDENTIFICATION2.1 Device designation 2.1.1 Nameplates

joes

Rectangle


5

2.1.2 Modelnumber

Model Number Description

CorrTran AQUA - MS2100L Base unit without local display

CorrTran AQUA with display - MS2150L Base unit with local display


6

2.2 Contents of delivery

Itisessentialtofollowtheinstructionsconcerningtheunpacking,transport,andstorageofthisinstrumentgiveninsection2.3,“Incomingacceptance,transport,storage.”

Unlessorderedascomponents,thecontentsofdeliveryconsistof:

• Assembledtransmitter

• 12’cable(forprobe)

• Instructionmanual(thisdocument)

2.3 Incoming acceptance, transport, storage 2.3.1 IncomingacceptanceCheckthepackingandcontentsforanysignsofdamage.Checktheshipmenttoensurethatallpartshavebeenincludedandtoverifythattheshipmentmatchesyourorder.

2.3.2 TransportProtectthetransmitterelectrodesfromdamage.Donotattempttocarrythetransmitterbyitselectrodes.

2.3.3 StorageAlwayspacktheinstrumentforstorageortransporttoprotectitagainstimpact.Theoriginalpackingmaterialprovidestheoptimumprotectionforthedevice.Thepermissiblestoragetemperatureis-40°Fto+176°F(-40°Cto+80°C).

2.4 Certificates and approvals TheCorrTranAQUAisdesignedtomeetrelevantsafetyrequirements.Ithasbeenfullytestedtoensurethatitisinsafeoperatingcondition.Theinstrumentcomplieswiththeapplicableregulationsinaccordancewithknownstandards.

2.5 Registered trademarks HART®RegisteredtrademarkofHARTCommunicationFoundation,Austin,USA

Viton®RegisteredtrademarkofthecompanyE.I.DuPontdeNemours&Co.,Wilmington,USA

2.6 Patents ThisinstrumentisprotectedbyoneormorepatentsregisteredintheUSPatentOffice.

Attention


7

3. INSTALLATION AND MOUNTING3.1 Dimensions

Ø14.8

48.2

Ø10

Ø10

Ø10.8

M12x1external threads

Ø10.8

Ø14.8

45.3

M12x1internalthreads

Probecable

ProbeCableLength:3.6m(12’)

4 - 20 mA PROBE

5.4"

3.4"

7.1"

7.1"

joes

Line

joes

Line

joes

Line

joes

Line

joes

Line

joes

Line

joes

Sticky Note

Unmarked set by joes

joes

Line

joes

Line

joes

Line

joes

Line

joes

Line

joes

Line


8

Figure 1. CMC Probe Installation Figure 2. CMC Probe Installation

3.2 Mounting safety procedures and hints Theelectrodesselectedmustreflectthesamemetalpropertiesasthepipingorothercomponentssusceptibletocorrosion.

3.2.1 Mountingrequirements/scenarios

ThetransmittershouldnotbemountedinapipedropsincethecorrosiveliquidmaynotbeinfullcontactwiththeelectrodesasshowninFigure1.

CorrTranAQUAshouldbemountedintheriserofapipenearanelbowwherethevelocityisthehighest.Ingeneral,CorrTranAQUAshouldbemountedinpipesortanksatlocationsofhighestliquidvelocityandconstantimmersion,showninFigure2.Forvelocitiesgreaterthan20fps,theprotrudingfingerelectrodesmustbeprotected.Asnotedabove,highfluidvelocitiescanalsocauseunwantedturbulenceinthepipeduetotheextensionoftheprobe.

4 - 20 mA PROBE

Attention

Warning

4 - 20 mA PROBE

OK!

15 diameters downstream


9

TheCorrTranAQUAprobecanbelocatedatanypointonthepipelinebutshouldalwaysbeimmersedinthecorrosivematerialasshowninFigure3.

Figure 3. Correct CorrTran AQUA Pipeline Position

Ateeinthecondensatereturnline(Figure4)isagoodlocationtomounttheCorrTranAQUAprobe

Figure 4. CorrTran AQUA Located in Tee

4 - 20 mA PROBE

4 - 20 mA PROBE

4 - 20 mA PROBE

Note: The line must be full at all times and electrodes must be located in the bottom half of the line. Electrodes must be covered at all times.


10

TheCorrTranAQUAprobeshouldbelocateddownstreamofacontrolvalveforbestperformanceandcanalsobelocatedinthedeadlegportionofaby-pass.Notethattheprobelocatedintheby-passlegshouldbemountedinfrontofthevalveforbestperformance.SeeFigure5.Thisguaranteesthattheelectrodeswillalwaysbeimmersedinthecorrosivematerial.

Figure 5. CorrTran AQUA Located in Bypass Loop Top View

InstallingseparateCorrTranAQUAprobeswithdifferentelectrodematerialsonthesuctionsideofthepumpwillensuremonitoringofthepumpimpellerandthepipeasshowninFigure6.Thereshouldbeaminimumseparationdistanceof50cm(19.7”)betweenprobes.

Figure 6. CorrTran AQUA Probes Mounted With Different Electrodes

4 - 20 mA PROBE

4 - 20 mA PROBE

Note

15 diameters

Bypass Valve Bypass Valve

Control Valve

4 - 20 mA PROBE


11

Inadditiontopipes,acondensateflashtank,showninFigure7,isalsoagoodapplication.

Figure 7. CorrTran AQUA Installed in a Condensate Flash Tank

TheCorrTranAQUAprobeshouldNOTbelocatedintheblowdownofaY-strainerasshowninFigure8.NorshoulditbelocatedinthedischargesideofthebasketstrainerasshowninFigure9.

4 - 20 mA PROBE

4 - 20 mA PROBE

4 - 20 mA

PRO

BE

Figure 8. Probe Mounted in Y-Strainer Figure 9. Probe Mounted in Basket Strainer

CorrTranAQUAmaybeimplementedinarackinplaceoftraditionalmetal-losscouponmonitoringandcanbeinstalledinanexistingcouponrack.Inthiscase,theCorrTranAQUAprobesshouldbeinsertedinplaceofthecouponholderportsasshowninFigure10.

Figure 10. CorrTran AQUA Mounted in a Coupon Rack

4 - 20 mA PROBE

Directionofflow


12

3.3 Installation instructions 3.3.1 General

AtrainedspecialistmustperformthenecessaryinstallationandcommissioningofCorrTranAQUA.Recognizedrulesofthetechnologyandsetuprequirementsmustbemaintainedbothduringandafterinstallation.Safetyrequirementsmustbeobservedduringallinstallationsteps.

IfthepipeorvesselintowhichtheCorrTranAQUAistobeinsertedisunderpressureand/orcontainsanyhazardoussubstance,suchassteam,causticsolutions,acids,toxinsorothersubstancesspecifiedbyOSHAasphysicalorhealthhazards,thepipeorvesselmustfirstbedepressurized,anyhazardoussubstancepurgedtherefrom,andappropriatelockout/tagoutproceduresobservedinaccordancewithSection1910.147oftheOSHARegulations,beforeCorrTranAQUAcanbeinstalled.Failure to follow these procedures may result in serious injury or death.

CorrTranAQUAconsistsofthreebasiccomponents:

• Transmitter:Atransmitterhousingcontainstheelectronicsandprovidesthe4-20mAwithHARToutputsignal.

• Probe:Theremotemountprobeissuppliedwitha12’cable.

• Electrodes:Eitherfingerelectrodesorelectrodesflushtotheprobeendareused.For accurate measurements, use electrodes of the same alloy as the metal being investigated.

3.3.2 Electrode installationThe electrodes are sold separately and must be installed hand-tight. Ensure that the

Viton(standard)orKalrez(onrequest)gasketsareinplacepriortoinstallingtheelectrodes.

Typically,carbonsteelelectrodesareinspectedevery90to180daysandyellowmetalelectrodes(copperandcopperalloy)areinspectedevery180to360days.It’snotjustthegeneralcorrosionrate,it’salsofoulingorbridgingthatoccursthatmayresultinfalsereadings.Wheninstalledincorrosioncouponracks,theprobesshouldbeinspectedwheneveracorrosioncouponisremovedandreplaced.Iftheelectrodesarefouled,theyshouldeitherbecarefullycleanedorreplaced.

Figure 12. Electrodes and Viton Gaskets

Metal Samples recommends that the person installing the electrodes wear a plastic glove of the type used in medical offices or the type used by food preparers. It is important not to touch the electrodes with your bare hands.

Warning

Electrodes VitonGaskets

Note


13

3.3.3 Probe connection

Connect the transmitter to the probe using the supplied probe cable.

Tighten the connectors finger-tight to ensure a good, weatherproof connection.

Figure 13. Probe Connection

4 - 20 mA PROBE


14

4. STARTUP AND WIRING4.1 StartupThemeasurementcycleofCorrTranAQUAis34minutes.Whenpowerisfirstappliedtotheunit,theoutputwillread4mAfor34minutes.Afterthefirstreading,theoutputshouldgotohigherthan4mA,dependingonthecorrosionrate.

4.1.1 QuickwiringguideFieldinstallableV1-Gconnector(117051),Figure14.

Figure 14. Transmitter Wiring

4.2 HART introduction Metal Samples’ CorrTran AQUA probe supports the HART communication protocol. HART is an acronym for Highway Addressable Remote Transducer. The HART protocol makes use of the Bell 202 FSK standard to superimpose digital signals at a low level on top of the 4-20 mA signal. This enables two-way communication and makes it possible for additional information beyond just the normal process variable to be communicated to and from a smart field instrument.

4.3 Wiring with HART IfyouareusingCorrTranMVwithanon-HARTcompatibleI/Oofdatacollectiondevice,theKFD2-HLC-Ex1.D,HARTLoopConverter,canintegratethethreeCorrTranAQUAvariablesintoseparate,independent4-20mAoutputs.


15

Pleaseobservethefollowingguidelines:

• Alwaysuseagroundedpowersupply(ontheACside).

• EnsurethattheI/Ocardisisolatedfromground.

Figure 15. Connecting to analog auxiliary port on controller

Figure 16. Connecting with a HART modem or handheld

4.4 Post-installation check Afterwiringthetransmitterandconnectingtheprobes,performthefollowingchecks:

• Istheprobesecureandtightenedtospecifiedtorque?(Seesection3.4.3.)

• Havetheelectrodesbeencleaned?(Seesection3.4.2.)

• Istheterminalassignmentcorrect?(Seesection4.1.)

• Isthehousingcoverscrewedtight?

4-20 mA

Controller

4-20 mA

HART handheld

PACTware

250 Ω

HART modem

DC power supply unit

or Controller


16

5. THE HART MODEM5.1 HART modem introduction Any HART Modem can be used to communicate between the CorrTran AQUA and the CorrTran MV Evaluation Tool. Metal Samples recommends the US-HI-321 HART Modem.

5.2 Loading US-HI-321 device drivers IfyouareusingadifferentHARTmodemyoushouldensurethatyouhavesuccessfullyistalleditsassociatedsoftware/devicedriversbeforemovingontosection3.

IfyouareusingtheUS-HI-321HARTmodemfollowthesestepstoinstallitsdevicedriver.Ifyouhavealreadyinstalledthedevicedriverthenmoveontosection3.

• InsertSmarResearchProductCDthataccompaniestheUS-HI-321intoyourcomputerCD-ROM.TheCDwillautomaticallyopentothewindowseeninFigure17.

Figure 17. SmarResearch Product DC Launch Screen


17

• Byselecting‘English’thescreenshouldappearasshowninFigure18.

Figure 18. SmarResearch Product DC

• Select‘ProductDrivers’toaccesstheUS-HI-321productdriverasseeninFigure19.

Figure 19. Product Drivers


18

• Select‘InstallHI321Drivers’toinstalltheUS-HI-321drivers.ThescreenseeninFigure20willappear.IftheUS-HI-321driverhasbeensuccessfullyinstalled,itwillaskyoutopressanykeytocontinue.

Figure 20. US-HI-321 Driver Installation Screen

• TheUS-HI-321DriverhasnowbeensuccessfullyinstalledandtheSmarResearchProductCDcanbeejectedfromthecomputer.


19

Texmate, Inc. Tel. (760) 598-9899 • www.texmate.comPage 2 September 8, 2003 SD-50X Data Sheet (SD02)

Controls and Indicators Dip Switch Settings

Two Point Digital Scaling and Calibration - Quick Reference Guide

Digit/Descriptor Display Lock/Frequency

Default SettingWhen set to ON

displays [Lock] whenany button is pressed

Effect on Display

F

C

12

12

12

12

ON

ON

ON

ON

Dummy Zero

12

ONOFF50

ON60

Display Lock

Rejection Filter (Hz)

DefaultSetting

When set to ONdisplays [Lock] whenany button is pressed

F

CDummyZero

OFF50

ON60

Display Lock

RejectionFilter (Hz)

Rear View of the MeterUP ARROW

BUTTON

DOWN ARROWBUTTON

PROGRAM BUTTON: This button is used to move from oneprogram step to the next.When pressed simultaneously with theUP ARROW button, the Programming Mode is entered.UP ARROW BUTTON: Increases the value of the displayedparameter.DOWN ARROW BUTTON: Decreases the value of the dis-played parameter.NOTE: When the display lock switch is on and any button ispressed, the display will show only [Lock] momentarily asshown above and then return to the normal operational display.

PROGRAMBUTTON P

Enter theCalibration Mode Enter the

Calibration Mode

Operational Display

Operational Display

Operational Display

Select [cAL on]

TEXMATE

Prog.

Set DIP switchto lock OFF

TEXMATE

Prog.

Set the LOW input valueand enter the HIGH Input

[hi in] Mode

Apply the 4 mALOW inputcalibration signalto the meter.

TEXMATE

Prog.

Enter the LOW Input[Lo in] Mode

If display shows [cALErr] the calibration has been canceledand the previously calibrated scale

factors are retained in memory.(See page 2, para 5)

TEXMATE

Prog.

TEXMATE

Prog.

TEXMATE

Prog.

Pass Calibration Modeand enter Decimal Point

Setting Mode

12

ON

Set DIP Switchto Lock On

12

ON

Set DIP switchto lock ON

12

ON

Set DIP switchto lock OFF

12

ON

OR

TEXMATE

Prog.

ORPress

1

TEXMATE

Prog.

Set the HIGH input value andreturn to Operational Display

Apply the 20 mAHIGH inputcalibration signalto the meter.

Press1

TEXMATE

Prog.

Press1

Press1

TEXMATE

Prog.

Adjust the decimal pointto the desired position

Press1

Step 1

Two Point Calibration and ScalingExample: 4 to 20 mA input to read 0 to 20,000

Decimal Point Setting

Step 2

Step 3

Step 4

Step 5

Step 7

Step 2

Step 3

Step 4

Set the decimal point positionand return to Operational Display

Pressat same

timePress

at sametime

Operational DisplayTEXMATE

Prog.

Step 1

Pressat same

time

Pressat same

time

TEXMATE

Prog.

Adjust display to thedesired reading for

HIGH input

TEXMATE

Prog.

OR

Any value between-19,999 and 30,000may be selected. Reverse scaling

is accepted.

TEXMATE

Prog.

TEXMATE

Prog.

Adjust display to desiredreading for LOW input

OR

Step 6

Max differencebetween [hi in] &

[Lo in] displayvalues selectedcannot exceed32,000 counts.

If the input signal is dis-connected after Step 5, the

[Lo in] values are saved, andthe meter automatically

returns to the [hi in] mode whensignal power is re-applied.

Maximum positive reading is30,000 & maximum negativereading is -19,999. Maximumdisplay span is 50,000 counts.

6. CONFIGURING THE DISPLAY (if equipped)


20

7. CorrTranMV EVALUATION TOOL7.1 CorrTranMV Evaluation Tool introductionCorrTranMVEvaluationToolissuppliedwitheveryCorrTranAQUA.(**TheCorrTranMVEvaluationToolisfunctionallyequivalenttotheCorrTranAQUA.)Itprovidesaneasy-to-usesetupfeatureforCorrTranAQUAplustheabilitytostoreAQUAdatainASCIIfilesthatcanbeimportedintoyourfavoriteanalysispackage.

The unit may also be programmed using Metal Samples' PACTware programming environment. Please contact the factory for more information on PACTware.

7.2 Establishing communication with the CorrTranMV Evaluation Tool• ToestablishcommunicationbetweenyourCorrTranAQUAusingtheCorrTranMV

EvaluationTool,youmustfirstensurethatyourCorrTranAQUAandHARTmodemareconnectedasshowninsection4.3,thedevicedriversforyourHARTmodemhavebeensuccessfullyinstalled,andyouhavetheCorrTranMVEvaluationToolsoftwareinstalledonyoucomputer.

• OpenCorrTranMVEvaluationTool.Figure21showsthemain(default)screenyouwillseewhenopeningtheprogram.

Figure 21. CorrTranMV Evaluation Tool Main (default) Screen

7.2.1 AssigningtheHARTmodemtothecorrectcomportWhenfirstlaunched,theCorrTranMVEvaluationTooldefaultstoCom1andwillverylikelyneedtobechangedunlessyouareusingaRS232HARTmodem.

USBconnectionswillshowupascomportsintheCorrTranMVEvaluationToolenvironment.Ifyouarenotsurewhatcomportyourmodemisusing,gotoyourcomputer’sdevicemanagerbyopeningthefollowingwindows:

• ‘Controlpanel’>‘System’>‘Hardware’>‘DeviceManager’

• Expandthe‘Ports(COM&LPT)’tofindoutwhichcomportisbeingusedbytheUSBmodem,asseeninFigure22.


21

Figure 22. Device Manager Ports (COM & LPT)

NowthatyouknowtheappropriateComPortforyourHARTmodem:

• Select‘Communication’>‘ComPort’fromthetoolbarandselecttheComPortthathasbeenassignedtoyourHARTModem.

7.2.2 ConnectiontotheCorrTranAQUA• Select‘Communication’>‘Open”fromthetool.The‘Connect’buttonwillbecome

availableasseeninFigure23.

• Pressthe‘Connect’buttontoestablishcommunicationbetweentheCorrTranAQUAandCorrTranMVEvaluationTool.IfeverythinghasbeendoneproperlyallthefieldswillbepopulatedasseeninFigure24.

Figure 23. After Communication Opened


22

Figure 24. After Successfully Connected

Atthetopofthescreenthefollowingreadonlyinformationisdisplayed:

• Devicerevision• DeviceID• Hardwarerevision• Softwarerevision

7.3 CorrTran MV Evaluation Tool capabilities Onceaconnectionhasbeenestablished,informationfromtheCorrTranAQUAtransmittercanbegathered.

7.3.1 ProcessdatatabsTheprocessdatatab,seeninFigures23and24,allowsyoutoviewthemostrecentoutputsfromtheCorrTranAQUA.

• Cycle:NumberofcorrosionmeasurementcyclescompletedonCorrTranAQUAtransmittersincethedevicewaslastreset.SeeSection7.3.4forinformationonresettingthenumberofcycles.

• Update–PressingthisbuttonpopulatesallcategoriesontheprocessdatatabwiththecurrentCorrTranAQUAoutputvalues.

• Cyclic–PressingthisbuttonenablestheCorrTranMVEvaluationTooltoupdatethevaluesontheprocessdatatabeverymeasurementcycle.Whenthisbuttonisengagedthetimeremaininginthecurrentcycleisdisplayedatthebottomofthescreen.

• LogOn/Off–WhencheckeditenablesthedataloggingcapabilitiesoftheCorrTranMVEvaluationTool.Youwillneedtoplaceacheckmarkbyeachdatapointyouwishtolog.Figure27providesdataloggingofeverypossibledatapointinacyclicalmanner.FormoreinformationontheloggingcapabilitiesoftheCorrTranMVEvaluationToolseesection7.3.4.


23

Adatasetcanbemanuallyaddedtothelogfilebyclickingtheupdatebutton,orloggingcanbemadeautomaticforeverymeasurementcyclebyhavingcyclicselected.

• Gen.Corr.:Currentgeneralcorrosionreadinganditsmeasurementunits.

• Loc.Corr.:Currentlocalizedcorrosionreading.

• LC.Avg:Theaveragelocalizedcorrosionvalue.ThisvalueisaverageduntiltheCycles/AvgisresetortheCorrTranAQUAisresettofactorydefault.SeeSection7.3.4forinformationonCycles/Avgresetandresettingtofactorydefault.

• Sol.Cond.:CurrentsolutionconductancemeasureinSiemens(S)

• B-Value:CurrentmeasuredStern-Gearyvalue(Bharm)

• LpCurrent:Currentloopcurrent

Figure 25. Log On For All Data Points, Cyclic Mode

7.3.2 Onlineparameters:processvariablesThedeviceSettingtab,seeninFigure26,allowsyoutoconfigurethefollowingparameters:

• PVPreferences:AllowsyoutoconfigurethePrimaryVariable(PV)aseithergeneralorlocalizedcorrosion.

Note

IfgeneralcorrosionisselectedasthePrimaryVariablethenlocalizedcorrosionbecomesthesecondary.IflocalizedcorrosionisselectedasthePrimaryVariablethengeneralcorrosionbecomestheSecondaryVariable.TheTertiaryVariable(TV)isalwaysconductanceandcannotbechanged.

Note


24

• PVUnits,LRV,URV:allowsyoutoconfigurethePVunitsandrange,whengeneralcorrosionisassignedasthePV.ThedefaultvaluesontheCorrTranAQUAareinunitsofmpywitharangeof0…40mpy.ThefullrangeofCorrTranAQUAis0…1000mpy(0…25mmpy).

Note

WhenlocalizedcorrosionisassignedasthePV,nounitsorrangeareselectablebecauselocalizedcorrosionisunitlessandisonascalefrom0to1,with0beingnolocalizedcorrosionand1beingveryhigh.)

• Alarm Mode:ControlsthesettingsforanalarmthatactivateswhenthePVcorrosionrategoesbeyondtheURV.ThedefaultisAuto,andtheoptionsareasfollows:

• Auto–Outputgoesto22.5mAandresetsautomatically

• Manual–Outputgoesto22.5mAandresetsmanually

• Off–Alarmisturnedoff

• B value:ReferstotheBvalueorStern-Gearyvoltage,whichisdefaultedto25.6mV.BUserisonlyrelevantinLPRonlymode.Thisvaluedoesnotnormallyneedtobechanged.

• A Elect Area:Allowsyoutochangetheelectrodearea,whichisrequiredforthecorrosioncalculation.Thesurfaceareaisdefaultedto4.75cm2forthefingertypeelectrodes.Flushmountelectrodesaredefaultedto0.316cm2.

• K Probe Const:referstotheKprobeconstant,orcorrosionconstantK.Thisvalueisdependentonthepipe’smetalpropertiesandisrequiredforthecalculationprocess.

Thedefaultis11597.63 mm * cm2

year * cm2

K= 3270.22 * (atomic mass of metal in grams)(# of electrons in the corrosion reaction) * (density in g/cm2)

SeeElectrodeMaterialGuideTableintheAppendixforfactorycalculatedKvaluesofcommonelectrodematerials.

• Measurement Mode:Certaincorrosionmeasurementscanbeturnedofftogiveafasterresponseifnotrequiredforthecalculation.Thetwovariablesthatcanbeswitchedoffaregeneralcorrosion(GC)andlocalizedcorrosion(LC).Conductanceisrequiredforbothcorrosiontypesandcannotbeturnedoff.Ifallthreeareused,thedefaultisGC+LC+Cond.Thethreepossibleconfigurationsandcycletimesare:

• GC+LC+Con–General,Localized,Conductivity:21min.cycle

• GC+Con–General,Conductivity:4min.cycle

• LC+Con–Localized,Conductivity:17min.cycle


25

• Device Mode:ThisdeterminesthewaythegeneralcorrosioncalculationisperformedbytheCorrTranAQUA.

• Normal(HDA/LPR)–Aprocess-specificStern-Gearyvoltage(Bharm)iscalculatedwitheverymeasurementcyclethroughHDA.ThisvalueisthenimplementedintheLPRcorrosionratecalculation.Thisisthedefaultsettingandshouldbeleftintacttomaintainthebestaccuracy.

• LPRonly–AuserdefinedStern-Gearyvoltage(‘BUser’)isspecifiedandusedforallLPRcorrosionratecalculations.ThisishowCorrTranAQUAisconfigured.

• Device Settings Tab Buttons:ThesebuttonsarefoundatthebottomoftheDeviceStatusTabpage.

• ResetAlarm-ThisbuttonisusedtoresetthealarmwhenoperatingtheCorrTranAQUAinManualAlarmMode.

• ReadValues-PressingthisbuttonpopulatesallcategoriesonthedevicesettingstabwiththecurrentvaluesprogrammedontheCorrTranAQUAtransmitter.

• WriteValues-PressingthisbuttonprogramstheCorrTranAQUAtransmittertoallsettingscurrentlydisplayedontheDeviceSettingsTab.

Figure 26. Device Setting Tab


26

7.3.3 DevicestatustabTheDeviceStatustab,seeninFigure27,allowsyoutoviewanysystemerrorsorfaultstheCorrTranAQUAmaybeexperiencing.Errorsorfaultsappearascheckmarksnexttotheirdescriptor.

Figure 27. Device Status Tab Device

ThecauseofeacherrororfaultisdescribedinSection12,Troubleshooting,Table2.

• DeviceSettingstabbuttons:ThesebuttonsarefoundatthebottomoftheDeviceStatustabpage

• Resetconfigchangedflag:Clearsachecknexttoconfigurationchanged

• UpdateStatus:Updatesthedevicestatustabwiththemostrecentsystemerrorsorfaults

7.3.4 ToolstabTheToolstab,seeninFigure28,allowsyoutologcorrosiondata,extractpreviouslycollectedcorrosiondata,andaccesstheresettingfeaturesofCorrTranAQUA.


27

Figure 28. Tools Tab

• Data Logging:TheSelectFilebuttonallowsyoutosetthelocationforandthenameoftheLogFilewheredataisstoredwhentheLogfunctionisenabledontheProcessDatatab,seesection6.3.1.Dataissavedinoneoftwoways:

• Append–Dataisaddedtopreviouslyloggeddata• Overwrite–Datareplacespreviouslyloggeddata

• History File: TheSelectFilebuttonallowsyoutosetthelocationforandthenameoftheHistoryFilewheredataisstoredwhenGetHistorybuttonispressed.Dataisretrievedandsavedinoneoftwoways:

• Append–Dataisaddedtopreviouslyretrieveddata• Overwrite–Datareplacespreviouslyretrieveddata

• View Files: ClickingtheLogFilebuttonortheHistoryFilebuttonwillopentheirrespectivefiles.

• Initial Bavg-Value:ThedefaultsettingisActualAverageandresultsaretypicallybestifleftasis.

• Num of Cycles to read:TheCorrTranAQUAstoresdatafromitslast300cyclesinitsinternalmemory.BypressingtheGetHistorybuttontheCorrTranAQUAEvaluationToolextractsthedataforauserdefinednumberofcycles(1to300)andappendsoroverwritesittotheHistoryFile.

• Loop Current:WhenusingHARTcommunicationfordatacollection,the4-20mAsignalisnolongerimportant.Youcanchoosetosettheloopcurrenttoaconstantfixedvalue.IfyougetanerrorforElectrodeBalanceoutofRangeontheDeviceStatustab,settingtheloopcurrenttoahighmAfixedvalueshouldclearthis.Ifyouwanttheloopcurrenttochangebetween4-20mAastheprimaryvariablechangesselectActualPVValue(normal)whichisthedefaultsetting.

• Special Features:

• ResetCycles/Avg–Resetsthenumberofcyclesto0,clearstheinternalmemoryofitshistoricdata,andresetstheLC.Avg.calculation.

• ResetDevice–CyclespowertotheCorrTranAQUA.• FactoryDefault–HasthesamefunctionsoftheResetCycles/Avgbutton,and

resetsallsettingstothefactorydefault.


28

8. TRANSFERING PROCESS DATA TO EXCELTheCorrTranMVEvaluationToolallowsyoutoviewCorrTranAQUAprocessdataintwoways.Youcanusetheloggingfunctiontosetuparunninglogfilethatwillrecordthecorrosionvaluesyouselect.Thesecondmethodinvolvesretrievingdatafromtheinternalmemory,whichstoresdatafromthelast300cyclescreatingahistoryfile.BoththeLogFileandHistoryFilearesavedas.txtdocuments.TotransferthisdataintoExcel,clickontheviewlogfileorhistoryfilebuttononthetoolstabandtheappropriate.txtfilewillopenasseeninFigure29(forthisexample,thelogfileisused).

Figure 29. CorrTran MV Log File

• Select‘Edit’>‘SelectAll’fromthetoolbartoselectallthedatainthelogfile.

• Select‘Edit’>‘Copy’fromthetoolbartocopyallthedatainthelogfile.

• OpenanewExcelworkbookandselectcellA1.

• Select‘Edit’>‘Paste’fromtheExceltoolbartotransferallthelogdatatoExcel.AtthispointthedataisallincolumnAasatextformatandwillappearasseeninFigure30.


29

Figure 30. CorrTran MV Log File

• SelectallofcolumnAasseeninFigure30,Select‘Data’>‘TexttoColumns…’fromthetoolbarandthescreeninFigure31willappear.

Figure 31. Text to Columns

• SelectFixedwidthasseeninFigure31andthenpressFinish.ThetextdatahasnowbeentransposedtothepropercolumnswiththeproperheadingsasseeninFigure32.Adjustthecolumnsizestoaccommodatethedataasneeded.


30

Figure 32. Properly Sorted Data

• Youcannowtrendandanalyzethelogdataasneeded.Figure33isanexampleofhowyoucanplotgeneralcorrosion,localizedcorrosion,andconductanceovertime.

Figure 33. Example Log Data Graph


31

9. CHANGING CORRTRAN AQUA OPERATING MODE TOREDUCE THE EXCITATION FREQUENCY (Factory Default Setting for CorrTran AQUA)

ThefunctionalityhereisthatundercertainconditionstheCorrTrancanreadvaluesthatare,typically,muchhigherthanexpected.Thismaybeduetoahigh-capacitanceeffectontheelectrodescausedbyfilminginhibitors.

Toseeifthiseffectispresent,itisnecessarytoreducethesinewavefrequencyinordertoeliminatethecapacitanceeffect.OperatingtheunitinEnhancedMode1or2facilitatesthelowerfrequencysinewave.Iftheeffectisnotpresent,therewillbelittlechangebetweenstandardandenhancedmodes.Ifthereisabigreductioninthecorrosionrate,thenthecapacitanceeffectisrealandEnhancedMode1or2shouldbesetpermanentlyforthatapplication.DeterminingwhichEnhancedModetooperateinisdeterminedempirically.

Figure 34 is for the CorrTran EC. It is identical on the CorrTran MV or CorrTran AQUA. Note: CorrTran AQUA is shipped from the factory defaulted to this setting.

1. ConnecttheCorrTranEvaluationTool.EstablishCommunication.

2.OntheToolsTab,underLPR/HDAPerformanceselectEnhancedMode1.PresstheSetbuttontosendthesetuptotheunit.Ifthecorrosionratedoesnotchangeafter1-2hoursofoperation,thereisnocapacitanceeffect.ReturntheunittoStandardMode.

3. Ifthereisareductionincorrosionrate,tryEnhancedMode2.Ifareductionincorrosionrateisstillproduced,useEnhancedMode2otherwisereturnsettingtoEnhancedMode1.

Figure 34. Enhanced Mode

DisconnecttheEvaluationToolandreconnectyourDCA.Note:Theevaluationtimeforacompletecyclechangesfrom21minutesinStandardModetoapproximately37minuteswhenrunningEnhancedMode2.ItisbetweenthetwoforEnhancedMode1.ThisisthereasontobackdowntoEnhancedMode1ifEnhancedMode2doesnotproduceanadditionalreductionincorrosionrate.


32

10. REPLACEMENT PARTS AND ACCESSORIES10.1 CorrTran AQUA parts PleasesubmittheserialtagnumberonthenameplatewhenorderingreplacementpartsforCorrTranAQUA.

IfthepipeorvesselintowhichtheCorrTranAQUAistobeinsertedisunderpressureand/orcontainsanyhazardoussubstance,suchassteam,causticsolutions,acids,toxinsorothersubstancesspecifiedbyOSHAasphysicalorhealthhazards,thepipeorvesselmustfirstbedepressurizedandanyhazardoussubstancepurgedtherefrom,andappropriatelockout/tagoutproceduresobservedinaccordancewithSection1910.147oftheOSHARegulations,beforeCorrTranAQUAcanberemovedortheelectrodesreplaced.Failure to follow these procedures may result in serious injury or death.

ertificates

Warning

10.2 Accessories

ET915548 HART modem, HART to USB interfaceFor direct connection to your PC

ET1804 HART Loop ConverterConverts HART signal to 3 separate 4 ... 20 mA outputs


33

11. SYSTEM SPECSApplicationTheCorrTranAQUAperformscontinuous(electro-chemical)corrosionmeasurementofliquidsandgasses.

FunctionandSystemDesignMeasuringPrinciple:TheCorrTranAQUAutilizesstate-of-the-artalgorithmsanddataanalysistechniquestoaccuratelymeasuregeneralcorrosionrateandpitting.ToimprovetheperformanceoftheindustryacceptedLinearPolarizationResistance(LPR)techniquetheHarmonicDistortionAnalysis(HDA)isusedtocalculateandupdateaprocessspecificStern-Gearyvariable(Bharm)everymeasurementcycle.Tofurtherenhancetheperformance,anapplication-specificStern-Gearyvariable(B-value)iscalculatedandupdatedeverymeasuringcycle.ThereisnoneedtomanuallyupdatetheB-valuebecauseofprocesschanges.Duringthemeasurementcycle,CorrTranAQUAalsoperformsanautomatedElectrochemicalNoise(ECN)measurementwhichprovidesalocalizedcorrosion(pitting)measurement.Atthecompletionofeachmeasurementcycle,therespectivecorrosionrateandpittingvalueintheformofa4-20mA/HARTsignalisproducedandmadeavailabletoplantpersonnel.

EquipmentArchitectureSeeSection4.3WiringwithHART.


34

Technical dataInput

MeasuredVariable •Generalcorrosion:Electro-chemicalcorrosionthatproceedsmoreorlessuniformlyoverthesurfaceofthematerialexposedtothecorrosiveenvironment.

•Localizedcorrosion(pitting):Electro-chemicalcorrosionthatoccursatdiscretesitesonthematerialexposedtothecorrosiveenvironment.

•Conductance:Thereciprocalofthesolutionresistance.Itisameasureofhoweasilyelectricityflowsalongacertainpaththroughanelectricalelement.

MeasuringRange •Generalcorrosion:0...1000mpy(0...25mmpy),0...40mpy(0...1mmpy)defaultvalue

•Localizedcorrosion(pitting):Unitlessnumberfrom0...1,with0beingnolocalizedcorrosionand1beingveryhigh.

•Conductance:Notadjustable.MeasuredinSiemens.

Output

OutputSignal 4-20mAwithHARTprotocol,2-wire

SignalonAlarm Errorinformationcanbeaccessedviathefollowinginterfaces:• Currentoutput,22.5mA• Digitalinterface

Auxiliary Energy

LoadHART MinimumloadforHARTcommunication:250Ω

CableEntry IndustrystandardV1(M12connector)

SupplyVoltage 11-30VDCwitoutdisplay15-30VDCwithoptionaldisplay

RatedOperatingVoltage 11VDCminatmaxloopcurrent

ConnectableLoad Max.loadat24VDC:575Ωwithalarm/650Ωwithoutalarm

B-Value(Start-up) 25.6mV

Performance Characteristics

ReferenceOperatingConditions

•Temperature:-40°Cto+70°C(-40°Fto+158°F)

• Solutionconductance:Min4μS

• Generalcorrosionrate:0...1000mpy(0...25mmpy)

Accuracy •Voltagemeasurementandelectrodeexcitation:<0.02%

•Currentmeasurement:<0.1%


35

Technical data (continued)Operating Conditions

OperatingConditions

InstallationInstructions SeeSection3.4InstallationInstructions

Environment

AmbientTemperatureRange

Ambienttemperatureforthetransmitter:

•Withdisplay:-10°Cto+50°C(-14°Fto+58°F)

•Withoutdisplay:-40°Cto+70°C(-40°Fto+158°F)

StorageTemperature

DegreeofProtection

Mechanical Construction

Design,Dimensions SeeSection3.1Dimensions

Weight Approx.500g(16.1oz),transmitterhousing

Material •Housing:ABS

Human Interface

OperationConcept SeeSection4.3WiringwithHART.SeeSection5ConfigurationandCommissioning

Certificates and Approvals

Patents U.S.patents:7,239,156;7,245,132;7,265,559;7,282,928

joes

Rectangle

joes

Rectangle


36

12. TROUBLESHOOTINGIf you encounter problems configuring or using your CorrTran AQUA, consult the following troubleshooting table. If you continue to have problems, please contact your Metal Samples representative for further assistance.

Symptom Cause/Procedures Solution

No4-20mAoutput Checkvoltageandcompareitwiththespecificationsonthenameplate. Connectthecorrectvoltage

Measuringcorrectvoltagebutunitdoesnotrespond

Checkpolarityontheterminals. Seesection4.1:QuickWiringGuide

HARTcommunicationdoesnotfunction

Thecommunicationresistorisnotinstalledproperly. Seechapter4.3:WiringwithHART

Table 1. CorrTran AQUA Basic Troubleshooting Guide

Device Status Codes

Description Troubleshooting

PVoutoflimits TheprimaryvariablehasexceededeithertheLRVorURV.

ThiscanonlyhappenifGeneralCorrosionisassignedtothePVandtherangesarenotsetproperly.Extendtherangevaluestoincludecurrentdatapoint.Seesection6.3formoreinformation.

SVorTVoutoflimits

ThesecondaryortertiaryvariablehasexceededeithertheLRVorURV

ThiscanonlyhappenifGeneralCorrosionisassignedtotheSVandtherangesarenotsetproperly.Extendtherangevaluestoincludecurrentdatapoint.Seesection6.3formoreinformation.TheTVcannotbeoutoflimitsbecauseithasnolimits.

Analogoutputsaturated

Theanalogoutputhasreachedeitheritsminimumormaximum

ThiscanonlyhappenifthealarmmodeisoffandthePVexceedsitsLRVorURV.

Analogoutputfixed

TheanalogoutputsignalhasbeensettoafixedmAvalue.

ThisisaresultofsettingtheLoopCurrenttoafixedvalueonthetoolstab.Seesection6.3formoreinformation.

Morestatusavailable

ThisflagindicatesthatoneormoreoftheflagsintheMoreFieldDeviceStatussectionareset

Informationonly.

Coldstart Thisflagissetafterpowerhasbeenrecycledforonecommunicationtransaction.

Informationonly.

Configurationchanged

AchangehasbeenmadetotheCorrTranAQUAconfiguration.

ThiscanberesetbypressingtheResetConfigChangedFlagonthedevicestatustab.Seesection6.3formoreinformation.

Devicemalfunction

ThisflagindicatesthatoneormoreoftheflagsintheDeviceMalfunctionsectionareset.

Informationonly.

Table 2. Device Status Codes Troubleshooting Guide (continued on next page)


37

Device Status Codes

Description Troubleshooting

Highlocalizedcorrosiondetected

Thelocalizedcorrosionrateisabove0.3.

Informationonly.

Conductanceoutofrange

Themeasuredsolutionconductanceislowerthan4μS.Thisequalsaconductivityofapproximately1μS/cmforfingerelectrodes.

TheCorrTranAQUAneedsatleast4μSofsolutionconductanceorsolutionconductivityof1μS/cmforfullaccuracy.Thiscanalsobeanindicationthatthereistoomuchbuilduponthesurfaceoftheelectrodesandtheymayneedtobecleanedortheymaynotbefullyimmersedintheprocessfluid.

Celloffsetvoltageoverflow

TheCorrTranAQUAhasdetectedavoltagedifferencebetweenthethreeelectrodeswhichistoohightocompensate.

Typicallythisisanindicationthatthereistoomuchbuilduponthesurfaceoftheelectrodesandtheyneedtobecleanedorthattheyhaveexceededtheirusefullifeandshouldbereplaced.

Corrosionratecalculationnotpossible

TheCorrTranAQUAwasnotabletogetanyusefuldata.

Checktheelectrodesfordebris,checkforotherflags,andmakesurethattheelectrodesarefullyimmersed.

Electrodebalanceoutofrange

Duetoanextremelyhighunbalancedpotential(voltagedifference)oftheelectrodes,theCorrTranAQUAisdrawingmorepowerfromtheloopthanavailable.

Onewaytodealwiththisproblemistosettheloopcurrenttoafixedvalue(maxis20mA).Thisshouldonlyoccurunderveryrarecircumstances,wherethecorrosionrateisverysmall(loopcurrentisapprox.4mA)butatthesametimethereisahugepotentialdifferencebetweentheelectrodes.Thiscanindicatecontaminationofoneormoreelectrodes,corrosionmaskingeffectsofbuildup,orthatoneelectrodeisbentormissingfromtheprobe.

Internalfailure Hardwarefailuredetected Replacetransmitter

ADCfailure ADCfailuredetected Replacetransmitter

Memoryfailure Memoryfailuredetected Replacetransmitter

Table 3. Device Status Codes Troubleshooting Guide (continued from previous page)


38

13. MEASURING PRINCIPLE

Figure 35. CorrTran AQUA Corrosion Cell

GeneralcorrosionLinearPolarizationResistance(LPR)isbasedonthefactthatinacorrodingelectrodetherelationshipbetweenicorrandthepolarizationresistanceisgivebythefollowingequation:

icorr = BRp

,where Rp = ∆E∆I

with∆Ebeingtheappliedvoltageand∆Itheresultingcurrent.

HarmonicDistortionAnalysis(HDA)allowsCorrTranAQUAtodetermineicorrwithoutusingtheTafelslopes(ba,bc).Thisistypicallydonebyapplyingalowfrequencysinusoidalvoltageanddeterminingthedistanceoftheresultingcurrent.

CorrTranAQUAaccuratelymeasuresthegeneralcorrosionratebyimplementingHarmonicDistortionAnalysis(HDA)toimprovetheperformanceofLinearPolarizationResistance(LPR).Aprocess-specificStern-Gearyvoltage(Bharm)iscalculatedwitheverymeasurementcyclethroughHDA.ThisvalueisthenimplementedintheLPRcorrosionratecalculationresultinginahighlyaccurateselfadjusting,processspecificcorrosionratecalculation.CorrTranAQUAcanmeasurethegeneralcorrosionratefrom0…1000mpy(0…25mmpy).

LocalizedCorrosion(Pitting)ElectrochemicalNoise(ECN)isthemethodofmonitoringspontaneousfluctuationsgeneratedattheinterfaceofthecorrodingmetalandprocesssolution.Aslocalizedcorrosionoccurs,thesefluctuationsincrease.

TheCorrTranAQUAmonitorsforthesefluctuationsontheelectrodesurfacesfor17minutes.Itthenperformsastatisticalanalysisresultinginaunitlesspittingfactorvaluebetween0and1.Apittingfactorofnearly0representsnolocalizedcorrosionactivityandapittingfactorof1representshighlocalizedcorrosionactivity.Independentstudieshaverevealedthatasustainedpittingfactorofgreaterthan0.3iscauseforconcernandyoushouldinvestigatethesourceoftheelevatedLocalizedCorrosionrate.Formoreinformationontheinterpretationoflocalizedcorrosionpleasereviewourwhitepaper:“DetectingandInterpretingLocalizedCorrosionUsingCorrTranAQUA.”

Fe

Anodicsite

Cathodicsite

Fe2+

2H+

H2

Icorr 2e-

4 - 20 mA PROBE


39

ConductanceSolutionresistanceisameasureofhoweasilyelectricityflowsalongacertainpaththroughanelectricalelement.Thereciprocalofthesolutionresistanceissolutionconductance.

TheCorrTranAQUAmeasuressolutionresistanceinordertomoreaccuratelycalculatethegeneralcorrosionrates.AsanaddedfeatureCorrTranAQUAprovidesyouwiththesolutionconductanceinunitsofSiemensasthetertiaryvariablethatisnotscalable.CorrTranAQUArequiresaminimumsolutionconductanceof4μSinordertoprovidereliablecorrosiondata.

ThesolutionconductancevaluethatCorrTranAQUAprovidescanbeusedtoapproximatesolutionconductivitybythisrelationship:

Conductivity ( Scm ) ≈ Conductance (S)

19

Solutionconductivityisafunctionofdistance.Astheelectrodescorrode,theirsizesandgeometrychangecausingthiscorrelationtodeteriorate.TheCorrTranAQUAshouldnotbeconsideredasareplacementforstandardconductivitymeters.

Note


40

14. APPENDIX

Electrode material guide

Other materials are available on request.

Electrode material Key number K value UNS numberAluminum1100 0N 10940.96 A91100 2024 0O 11400.51 A920246061 0T — A960617075 1O — A97075Carbon & steel alloys1010 0S — G101001018 0A 11597.63 G101801020 1T 11401.49 G10200C4130 1R 11283.76 G41300Stainless steel1.4301 / 304 0C 11334.57 S304001.4307 / 304L 0D 11342.80 S30403 1.4401 / 316 0E 11513.39 S316001.4404 / 316L 0F 11519.53 S31603 1.4571 / 316Ti 1M 11382.15 S316351.4438 / 317L 1G 11400.62 S317031.4939 / 904L 1K 11287.19 N08904Copper alloysCDA110ETP (99.9 Cu) 0J 11686.71 C11000CDA220 (bronze) 0P 8644.02 R50400CDA443 (ARS AD. brass) 0M 12324.74 C44300CDA687 (Aluminium brass) 0L 12411.53 C68700CDA706 (Cu/Ni 90/10 0K 11513.44 C70610CDA715 (Cu/Ni 70/30) 0I 11337.86 C71500

ms2100l corrtran aqua manual · the corrtran aqua is a compact, 4-20 ma corrosion transmitter used...

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