Georg Fischer Signet 2630-X User manual

• Freechlorineelectrodesarepre-lledwithelectrolytesolution.Simplypulloffthe
protectivebootfromtheendoftheelectrodeandinstalltheelectrodeintotheow
celltting.
• Themembranecapmustbereplacedeverytimetheelectrolyteischanged.
Fill and Rell Procedure:
Whenaddingelectrolyte,bepreparedforanaccidentalspill.
Workingnearasinkisrecommended.
1. Removethemembranecapfromthefrontofthesensor.
2. Turnthesensorupsidedownandshakethesensorvigorouslytoremovethe
internalelectrolyte.
3. Fillsuppliedsyringewithelectrolytesolution.
4. Placetheelectrodeonalevelsurface.
5. Insertsyringeneedlefullyintooneofthefourelectrodeholeswhileinjecting
withelectrolytesolution.Theelectrodeholdsapproximately14millilitersof
solution.Inserttheneedletothebottomtoavoidcreatingbubbles.Carefullyll
untilsolutionbeginstoowoutofholes.Donotallowthesolutiontorundown
theelectrodeandwettheelectricalcontactsintheDryLocconnector.
6. Slowlyscrewonthemembranecapngertight.Donotusetools.
Toavoiddamageandcontamination,donottouchthewhitemembranesurface
onthemembranecap.
Signet'sAmperometricChlorineElectrodeisdesignedtomeasurefreechlorineinfreshwaterandwastewatertreatment
applications.Theelectrodeisavailableinmeasurementrangesof0to2ppm,0to5ppmor0to20ppm.
ThiselectroderequirestheSignet2650AmperometricElectronicsmoduletooutputadigital(S3L)signaltotheSignet8630
ChlorineTransmitter.
Features:
• Utilizingsmart-sensortechnology,thiselectrodeincorporatesauniqueembeddedmemorychipwithintheelectrodeto
communicateawidevarietyofinformationtotheSignet2650electronicsandSignet8630transmitter.Electrodetype,
factorycalibrationdata,servicetime,chlorinerange,highandlowpH(withoptionalSignetpHelectrode),temperaturelimits
andmorearestoredonthechip.ThisinformationisaccessibleviatheSignet8630transmitter.
• Signet'spatentedDryLoc®connectorprovidesquickassemblyandasecureconnection.Gold-platedcontactsandanO-ring
sealensureawaterproofandreliableinterconnecttotheSignet2650AmperometricElectronics.
• Integratedtemperatureelementforautomatictemperaturecompensation.
• Separatedriveelectronics(Signet2650)alloweasyelectrodereplacementwithoutrunningnewcable.
3-2630.090Rev.G04/12English
English
Caution!
1. Followinstructionscarefullytoavoidpersonalinjuryordamagetoelectrode.
2. Priortoinstallationorremoval:
 a. Disconnectowthroughsystem.
 b. Drainbelowsensorlevel.
3. Conrmchemicalcompatibilitybeforeuse.
4. Donotexceedthemaximumpressureortemperaturespecications.
5. Donotalterproductconstruction.
1. Description
Signet 2630-X Amperometric Chlorine Electrode
2. Electrolyte
Avoid skin or eye contact with electrolyte solution.
Wear rubber gloves and goggles.
*MaterialSafetyDataSheets(MSDS)areavailableonlineat
www.gfsignet.com.
1. Description p.1 5. Operation p.3 9. Overview p.4
2. Electrolyte p.1 6. Calibration p.3 10. Troubleshooting p.5
3. Installation p.2 7. Maintenance p.3 11. Ordering p.6
4. Mounting Position p.2 8. Storage and Disposal p.3 12. Technical Data p.8
*3-2630.090*

2 263XSeriesChlorineElectrodes
3. Installation
4. Mounting Position - PVC Tee
Aligntabonelectrodewithnotchon
tting.Insertuntilfullyseated.
LubricateO-ringswithanon-petroleum
based,viscouslubricant(grease)
compatiblewiththesystem.
Mounttheowcellwherethesensorwillbeeasilyaccessible.
Toavoidairbubbleentrapment,donotmountwithdownwardow.
no
Flow
Flow
Best
Flow Direction
Good
45º or or45º
Do Not Use Lubricant or Sealing Tape on Threads.
Do Not Overtighten. Do Not Use Tools.

3263XSeriesChlorineElectrodes
Theelectrolytellsolutioninsidetheelectrodemustberelledperiodically.SeeSec.2.Themembranecapmustbereplacedevery
timetheelectrolyteischanged.Aweeklyinspectionisrecommended.Dirtyprocesswatercanfoulthemembrane.Ifitbecomesdirty,
rinsewithfreshwateronly.Donotusebrushes,detergentsorsolvents.Ifafreshwaterrinsedoesnotcleanthemembrane,itwill
needtobereplaced.Keepsparemembranecapsavailable.Membranecapscarrynowarranty.
7. Maintenance
6. Calibration
Anewchlorineelectrodeoronethathashadthemembranecapchangedmustbecalibrated.RefertotheSignet8630Chlorine
Transmittermanualforelectrodeandinstrumentcalibrationinformation.Adiethyl-p-phenylenediamine(DPD)colorimetertestkit(not
included)isrequiredforsensorcalibration.AsampleistakenandanalyzedwiththeDPDtestkit,thenthisvalueisenteredintothe
Signet8630transmitter.
• Calibrateafteramembranecapchange.
• Checkcalibrationonedayaftersensorisplacedinservice.
• Checkcalibrationweeklytomonthlydependingonprocessrequirements.
8. Storage and Disposal
8.1. Disposal
Storeelectrodebetween–10to60ºC
(–14to140ºF)atarelativehumidity
thatdoesnotexceed95%.Theprimary
concernswhenstoringtheelectrodeis
membranedehydrationandfreezingin
extremelycoldenvironments.
Theelectrodeisnotrecyclable.Disposeofproperlyaccordingtolocal,stateandfederalguidelines.
Storage Time Action
≤7Days Storeelectrodeintheowcellwithwatertoprevent
membranedehydration.
>7Days
Storeelectrodewiththeprotectivecoverforthemembrane
attached;orimmersetheendoftheelectrodeinasmall
containerofwatertokeepthemembranewet.Donotgetthe
electricalcontactsontheDryLocendoftheelectrodewet.
>1month
Unscrewthemembranecapandstoreitfullyimmersedintap
water.Removetheelectrolytefromtheelectrodebyholding
itoveracontainerandshakingitoruseasyringeandneedle
towithdrawthesolution.
DO NOT
FREEZE
Electrode Range: Theelectrodemustmatchthetypeand
rangeofchlorineconcentrationtobemeasured.
Flow Rate:
Theelectrodemusthaveastableandconstantowofwater
pastitsmembraneforaccuratemeasurement.Whenthe
sensorisinstalledintheTeeowcell3-3610-2(159001684),
theowratemustrangefrom37.8to75.7LPH(10to20
USg/h).
WhenthesensorisinstalledintheFlowCellBlock
(3-4630.392,159001690),theowraterangeshouldbe
30.24to45.36LPH(8to12USg/h).
Sensor Conditioning: 4 hours
Anewelectroderequiresconditioningof4hourswiththe
electrodepoweredonandwaterowingpasttheheadto
generateastablereading.
Subsequentstart-upscanrequireanelectrodeconditioningof
uptotwohours.
5. Operation
Themaximumallowableoperatingpressuremust
belessthan0.48bar(7psi).Higherpressureswill
damagetheelectrode.
Theelectrodeshouldnotbeusedinwatercontaining
surfactants,oils,organicchlorineorstabilizerssuchas
cyanuricacid.
Part Number Chlorine Range Chlorine Type
3-2630-1 0to2ppm(mg/l)
Freechlorine3-2630-2 0to5ppm(mg/l)
3-2630-3 0to20ppm(mg/l)

4 263XSeriesChlorineElectrodes
pH Compensation for Free Chlorine
Amperometricfreechlorinesensorsmeasureonlyhypochlorous
acid.AsnotedinthetextaboveandinFigure1,theratio
ofhypochlorousacidandhypochloriteispHdependent.In
manyapplicationstheprocesspHisrelativelystableandno
correctionisneeded.However,wherethepHofthewater
changessignicantly,accuratefreechlorinemeasurement
requirespHcompensation.WiththeadditionofapHsensor,the
Signet8630transmitterwillautomaticallycompensatethefree
chlorinereadingforchangesinpH.
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
100
90
80
70
60
50
40
30
20
10
0
HOCl
OClˉ
% free chlorine
pH at 25 °C
FIG.1
Automatic pH Compensation and Free Chlorine
Inmanyapplications,theprocesspHdoesnotsignicantly
uctuateandonlyasensorandinstrumentisnecessaryfor
accuratechlorinemeasurement.
ItiswhenthepHvariesthatfreechlorineconcentrationcan
notaccuratelybedeterminedwithouttheuseofautomaticpH
compensation.
TheadditionoftheSignet3-2724-00(159001545)pH
electrodealongwithits3-2750-7(159001671)preamplier
tothesystemmakespHcompensationextremelyeasyand
automaticevenwithwideuctuationsorhighpH.
SeeFigure2forpHvariationrecommendations.
Example:
IfthepHnominalvalueis7.5andthepHvariationis±0.2then
automaticpHcompensationisrecommended.
IfthepHnominalvalueis7.0andthepHvariationis±0.2then
automaticpHcompensationisnotrequired.
6.5 7.0 7.5 8.0 8.5 9.0
0
±0.3
±0.1
±0.2
=
pH variation
Sample pH
Automatic pH compensation recommended
in ranges within shaded area
FIG.2
Chlorine Measurement by Amperometric Sensors
Signetchlorinesensorsaremembrane-coveredamperometric2-electrodesensors.Agoldorplatinumcathodeactsastheworking
electrodewithasilverhalideactingasthecounterelectrode.Dependingonthespeciestobeanalyzed,apolarizationvoltageis
appliedbetweenthetwoelectrodes.Whenplacedintoservice,thechlorinespeciesofinterestdiffusesacrossthemembraneand
isreducedatthecathodesurface.Forthecaseoftotalchlorine,theanalytereactswiththellsolutiontoproduceanintermediate,
whichissubsequentlyreducedatthecathodesurface.Atthesametime,thesilveranodeisoxidizedtoformasilverhalide.The
currentgeneratedatthecathodeisproportionaltotherateofdiffusionthroughthemembraneandtheconcentrationofchlorineinthe
sample.Thecurrentfromthecathodetotheanodeisconditioned,digitizedandtransmittedbytheassociatedelectronics.
9. Overview
Chlorine in Water
Variousformsofchlorineareusedtodisinfectwater.Eachformofchlorinehasbenetsandlimitationswhichhelpdeterminethe
specicapplication.ThepredominantcategoriesusedindisinfectionareFreeChlorine,TotalChlorineandChlorineDioxide.Free
Chlorineisthesumofchlorinegas(Cl2),hypochlorousacid(HOCl)andhypochlorite(OCl
-
).AbovepH4.0allofthemolecular
chlorineisconvertedtoHOClandOCl
-
.HypochlorousacidisamorepotentdisinfectantthanhypochloriteandexistsinapH
dependentequilibriumasshowninFigure1.
Freechlorinealsocombineswithnaturallyoccurringorhuman-introducednitrogencompoundsinthewatertoformchloramines,also
knownascombinedchlorine.Treatmentoperatorsintroduceammoniaintothewatertoformmonochloramine(NH2Cl),dichloramine
(NHCl2)andtrichloramine(NCl3).Chloraminesarealesseffectivedisinfectantbuthavealongerresidencetimethanthefreechlorine
species.Totalchlorineisthesumoffreechlorine(Cl2,HOClandOCl
-
)andcombinedchlorine(NH2Cl,NHCl2,NCl3).

5263XSeriesChlorineElectrodes
10. Troubleshooting
Problem Possible Causes Remedies
Sensorcannotbecalibrated.
OutputishigherthanDPDtest
(outofrange).
Sensorconditioningtimetooshort Conditionfor4hoursminimumpriortoinitial
calibration
Interferencefromcontaminants Seetechnicaldata
Membranecapdamaged Replacecapandrecondition
DPDchemicalsbad Usefreshreagents
pHoutsideofworkingrange Seetechnicaldata
Sensorcannotbecalibrated.
OutputislowerthanDPDtest.
Sensorconditioningtimetooshort Conditionfor4hoursminimumpriortoinitial
calibration
Chlorinecontenttoolow DPDvaluemustbegreaterthan0.5ppmto
calibrate
Lowowrate Checktomakesureowrateissufcient
Airbubblesonelectrodemembrane Inspectvisually.Taptoremovebubbles.Mount
atanangle.
Lowornoelectrolyteinelectrode Fillelectrodewithelectrolyte
Organicchlorinationagentspresentinwater Seetechnicaldata
Surfactantsinwater Removesurfactantsandreplacecap
Membranecapcoated Cleanorreplacemembranecap
Membranecaploose Tightenorreplacemembranecap
pHoutsideworkingrange. Seetechnicaldata
Sensoroutputverylow
Sensorconditioningtimetooshort Conditionfor4hoursminimumpriortoinitial
calibration
Chlorinecontenttoolow Addchlorinetovalidate
Onlyboundchlorinepresent.Nofreechlorine CheckforchloraminewithappropriateDPDtest
Electrodenotmakinggoodcontactwithelectronics Inspectandreconnect
Unstableoutputfromsensor
Airbubblesonelectrodemembrane Inspectvisually.Taptoremovebubbles.Mount
atanangle.
Membranedamaged Replacemembrane.Conditionsensorforat
least2hoursandrecalibrate.
Electrodenotmakinggoodcontactwithelectronics Inspectandreconnect
Non-sensorproblem
Check3-2650Electronicsconnectionto
electrode(see3-2650manualforinstructions).
Makesureconnectionsaredry.Check
instrumenthookup.
TransmittererrormessagesrelatedtocalibrationaredetailedintheSignet8630ChlorineTransmitteroperationmanual.

6 263XSeriesChlorineElectrodes
11. Ordering Information
Mfr. Part No. Code Description
3-2630-1 159001746 FreeChlorineelectrode,0to2ppm(mg/l)
3-2630-2 159001662 FreeChlorineelectrode,0to5ppm(mg/l)
3-2630-3 159001747 FreeChlorineelectrode,0to20ppm(mg/l)
Accessories and Replacement Parts
Mfr. Part No. Code Description
3-2630.391 159001674 FreeChlorineelectrolyte,30ml
3-2630.392 159001675 FreeChlorinereplacementmembrane(1)
3-2630.396 159001676 FreeChlorinereplacementkit-(2)electrolyteand(2)membranes
3-0700.390 198864403 pHBufferKit(1each4,7,10pHbufferinpowderform,makes50mL)
3822-7004 159001581 pH4.01buffersolution,1pint(473ml)
3822-7007 159001582 pH7.00buffersolution,1pint(473ml)
3822-7010 159001583 pH10.00buffersolution,1pint(473ml)
3-2700.395 159001605 Calibrationkit:included3polypropylenecups,boxusedascupstand,
1pintpH4.01,1pintpH7.00

7263XSeriesChlorineElectrodes
Notes:

Georg Fischer Signet LLC, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. [phone] • Fax [phone]
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): [phone]
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2630.090Rev.G04/12English ©GeorgFischerSignetLLC2012
12. Technical Data
74.4 mm (2.93 in.)
25.15 mm (.99 in.)
109.2 mm (4.3 in.)
72.6 mm (2.86 in.)
25.15 mm (0.99 in.)
26.4 mm (1.04 in.)
107.2 mm (4.23 in.)
26.4 mm (1.04 in.)
Dimensions
General
Polarization Source:
Signet2650AmperometricElectronics
Compatible Flow Cells:
Signet3-3610-1(159001683)
Signet3-3610-2(159001684)
Signet3-4630.392(159001690)
Mounting:
SignetDryLocconnection
Materials:
CPVC
FreeChlorine:
Membranematerial:PVDF
O-ringmaterial:FPM
Workingelectrode:Gold
Counterreferenceelectrode:Silverhalide
Wetted Materials:
PVC,PVDF,FPM
Performance
Electrode:
Repeatability:±0.08ppm(mg/l)or3%ofselected
rangewhicheverisless
Slope:10to60nA/ppm(mg/l)
Responsetime,T90:<2minutes
System:(includingelectronicsandinstrument)
Accuracy:<±3%ofelectrodesignalaftercalibration
Resolution:≤0.5%ofelectroderange
Sensor Conditioning:
New,rststart-up:
4hoursmaximumbeforecalibration
Subsequentstart-ups:
2hoursmaximum
Temperature Element:
PT1000
Operational Ranges and Limits
FreeChlorineRange:
0to2ppm(mg/l)
0to5ppm(mg/l)
0to20ppm(mg/l)
FreeChlorinepHOperatingRange:
5.5to9.0pH
OperatingTemperature:
0to45°C(32to113°F)
Maximum Operating Pressure:
Membrane:
0.48bar@25°C(7psi@77°F)
Flow Velocity Across Membrane Surface:
Minimum:15cm/s(0.49ft/s)
Maximum:30cm/s(0.98ft/s)
Free Chlorine Cross Sensitivity:
ClO2,ozone,bromine
Chemical Compatibility:
<50%ethanol/water,<50%glycerol/water
Environmental Requirements
Storage Temperature (dry):
-10to60ºC(-4to140ºF)
Operating Temperature:
0to45ºC(32to113ºF)
Relative Humidity:
0to95%indoor/outdoornon-condensingto
ratedambient
Standards and Approvals
CE
ManufacturedunderISO9001
ChinaRoHS(Gotowww.gfsignet.comfordetails)