YOKOGAWA SC450G User manual

User’s
Manual
IM 12D08N05-01E
5th Edition
Model SC450G
Conductivity Converter
[Style: S2]

Enter
Measurement setup
Temperature settings
Temp. Compensation
Calibration settings
Concentration
Measure Conductivity only
Configure sensor
Commissioning
NOTE
This page may be referred to when
reading pages where subsequent
submenu screens are shown in the text.
Connection to the relevant submenu
screen is indicated by a dotted line with
an arrow.
Note that screens in the text are typical
examples and actual screens may
differ depending on the set parameters.
Connection to the relevant submenu screen
is indicated by a dotted line with an arrow.

IM 12D08N05-01E
i
<PREFACE>
PREFACE
Thank you for purchasing the SC450G Conductivity Converter.
Please read the following respective documents before installing and using the SC450G
Conductivity Converter.
The related documents are as follows.
 GeneralSpecications: GS12D08N05-01E
 User’sManual:  IM12D08N05-01E(thismanual)
* the “E” in the document number is the language code.
AnexclusiveUser’sManualmightbeattachedtotheproductswhosesufxcodesoroption
codescontainthecode“Z”(madetocustomers’specifications).Pleasereaditalongwith
this manual.
WARNING
Electrostatic discharge
The SC450G converter contains devices that can be damaged by electrostatic discharge.
When servicing this equipment, please observe proper procedures to prevent such
damage.
Replacement components should be shipped in conductive packaging. Repair work should
be done at grounded workstations using grounded soldering irons and wrist straps to avoid
electrostatic discharge.
WARNING
Installation and wiring
The SC450G converter should only be used with equipment that meets the relevant IEC,
American or Canadian standards. Yokogawa accepts no responsibility for the misuse of
this unit.
CAUTION
The Instrument is packed carefully with shock absorbing materials, nevertheless, the
instrument may be damaged or broken if subjected to strong shock, such as if the
instrument is dropped. Handle with care.
No.IM12D08N05-01E 5thEdition:Aug.2017(YK)
AllRightsReserved.Copyright©2007,YokogawaElectricCorporation

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<PREFACE>
CAUTION
• Donotuseanabrasiveororganicsolventincleaningtheinstrument.
• DonotmodifytheSC450Gconverter.
• SubstitutionofcomponentsmayimpairsuitabilityforDivision2.
Do not remove or replace while circuit is live unless area is known to be non-
hazardous.
Explosion Hazard – Do not disconnect equipment unless area is known to be
nonhazardous.
Do not reset circuit breaker unless power has been removed from the equipment or
the area is known to be non-hazardous.
nNotice
• Thismanualshouldbepassedontotheenduser.
• Thecontentsofthismanualaresubjecttochangewithoutpriornotice.
• Thecontentsofthismanualshallnotbereproducedorcopied,inpartorinwhole,
without permission.
• Thismanualexplainsthefunctionscontainedinthisproduct,butdoesnotwarrantthat
they are suitable the particular purpose of the user.
• Everyefforthasbeenmadetoensureaccuracyinthepreparationofthismanual.
However, when you realize mistaken expressions or omissions, please contact the
nearestYokogawaElectricrepresentativeorsalesofce.
• Thismanualdoesnotcoverthespecialspecifications.Thismanualmaybeleft
unchanged on any change of specification, construction or parts when the change
does not affect the functions or performance of the product.
• Iftheproductisnotusedinamannerspecifiedinthismanual,thesafetyofthis
product may be impaired.
Yokogawa is not responsible for damage to the instrument, poor performance of the
instrumentorlossesresultingfromsuch,iftheproblemsarecausedby:
• Improperoperationbytheuser.
• Useoftheinstrumentinimproperapplications
• Useoftheinstrumentinanimproperenvironmentorimproperutilityprogram
• Repairormodificationoftherelatedinstrumentbyanengineernotauthorizedby
Yokogawa.
n SafetyandModicationPrecautions
Follow the safety precautions in this manual when using the product to ensure protection
and safety of the human body, the product and the system containing the product.
nWarranty and service
Yokogawa products and parts are guaranteed free from defects in workmanship and
materialundernormaluseandserviceforaperiodof(typically)12monthsfromthedateof
shipment from the manufacturer. Individual sales organizations can deviate from the typical
warranty period, and the conditions of sale relating to the original purchase order should be
consulted. Damage caused by wear and tear, inadequate maintenance, corrosion, or by
the effects of chemical processes are excluded from this warranty coverage.

IM 12D08N05-01E
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<PREFACE>
Intheeventofwarrantyclaim,thedefectivegoodsshouldbesent(freightpaid)to
the service department of the relevant sales organization for repair or replacement
(atYokogawadiscretion).Thefollowinginformationmustbeincludedintheletter
accompanyingthereturnedgoods:
•Part number, model code and serial number
• Originalpurchaseorderanddate
• Lengthoftimeinserviceandadescriptionoftheprocess
• Descriptionofthefault,andthecircumstancesoffailure
• Process/environmentalconditionsthatmayberelatedtothefailureofthedevice.
• Astatementwhetherwarrantyornon-warrantyserviceisrequested
• Completeshippingandbillinginstructionsforreturnofmaterial,plusthenameand
phone number of a contact person who can be reached for further information.
Returnedgoodsthathavebeenincontactwithprocessfluidsmustbedecontaminated/
disinfected before shipment. Goods should carry a certificate to this effect, for the health
and safety of our employees. Material safety data sheets should also be included for all
components of the processes to which the equipment has been exposed.

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<PREFACE>
Safety Precautions
n Safety,Protection,andModicationoftheProduct
• Inordertoprotectthesystemcontrolledbytheproductandtheproductitselfand
ensure safe operation, observe the safety precautions described in this user’s
manual. We assume no liability for safety if users fail to observe these instructions
when operating the product.
• Ifthisinstrumentisusedinamannernotspeciedinthisuser’smanual,theprotection
provided by this instrument may be impaired.
• Ifanyprotectionorsafetycircuitisrequiredforthesystemcontrolledbytheproductor
for the product itself, prepare it separately.
• BesuretousethesparepartsapprovedbyYokogawaElectricCorporation(hereafter
simplyreferredtoasYOKOGAWA)whenreplacingpartsorconsumables.
• Modicationoftheproductisstrictlyprohibited.
• Thefollowingsafetysymbolsareusedontheproductaswellasinthismanual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this
manual in order to avoid the risks, for the human body, of injury, electric shock, or
fatalities. The manual describes what special care the operator must take to avoid
such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual
inordertopreventtheinstrument(hardware)orsoftwarefrombeingdamaged,ora
system failure from occurring.
The following are signal words to be found only in our instruction manuals.
CAUTION
This symbol gives information essential for understanding the operations and
functions.
NOTE
This symbol indicates information that complements the present topic.
This symbol indicates Protective Ground Terminal.
This symbol indicates Function Ground Terminal. Do not use this terminal as the
protective ground terminal.
Alternating current
Direct current
nWarning and Disclaimer
Theproductisprovidedonan“asis”basis.YOKOGAWAshallhaveneitherliabilitynor
responsibility to any person or entity with respect to any direct or indirect loss or damage
arisingfromusingtheproductoranydefectoftheproductthatYOKOGAWAcannot
predict in advance.

IM 12D08N05-01E
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<PREFACE>
nNotes on Handling User’s Manuals
• Pleasehandovertheuser’smanualstoyourenduserssothattheycankeepthe
user’s manuals on hand for convenient reference.
• Pleasereadtheinformationthoroughlybeforeusingtheproduct.
• Thepurposeoftheseuser’smanualsisnottowarrantthattheproductiswellsuitedto
any particular purpose but rather to describe the functional details of the product.
• Nopartoftheuser’smanualsmaybetransferredorreproducedwithoutpriorwritten
consentfromYOKOGAWA.
• YOKOGAWAreservestherighttomakeimprovementsintheuser’smanualsand
product at any time, without notice or obligation.
• Ifyouhaveanyquestions,oryoufindmistakesoromissionsintheuser’smanuals,
please contact our sales representative or your local distributor.
nDrawing Conventions
Somedrawingsmaybepartiallyemphasized,simplied,oromitted,fortheconvenienceof
description.
Some screen images depicted in the user’s manual may have different display positions or
charactertypes(e.g.,theupper/lowercase).Alsonotethatsomeoftheimagescontained
in this user’s manual are display examples.
nProduct Disposal
Theinstrumentshouldbedisposedofinaccordancewithlocalandnationallegislation/
regulations.
nTrademark Acknowledgments
• Allothercompanyandproductnamesmentionedinthisuser’smanualare
trademarks or registered trademarks of their respective companies.
• WedonotuseTMor®marktoindicatethosetrademarksorregisteredtrademarksin
this user’s manual.

IM 12D08N05-01E
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<PREFACE>
CE marking products
nAuthorized Representative in EEA
TheAuthorizedRepresentativeforthisproductinEEAisYokogawaEuropeB.V.(Euroweg2,
3825HDAmersfoort,TheNetherlands).
n IdenticationTag
This manual and the identification tag attached on packing box are essential parts of the
product.
Keepthemtogetherinasafeplaceforfuturereference.
nUsers
This product is designed to be used by a person with specialized knowledge.
nHow to dispose the batteries:
ThisisanexplanationabouttheEUBatteryDirective.ThisdirectiveisonlyvalidintheEU.
Batteriesareincludedinthisproduct.Batteriesincorporatedintothisproductcannotbe
removed by yourself. Dispose them together with this product.
WhenyoudisposethisproductintheEU,contactyourlocalYokogawaEuropeB.V.ofce.
Do not dispose them as domestic household waste.
Batterytype:Manganesedioxidelithiumbattery
Notice: Thesymbol(seeabove)meanstheyshallbesortedoutandcollectedasordainedintheEU
BatteryDirective.

IM 12D08N05-01E
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<TABLE OF CONTENTS>
Model SC450G
Conductivity Converter [Style: S2]
IM 12D08N05-01E 5th Edition
CONTENTS
PREFACE................................................................................................... i
Safety Precautions ................................................................................. iv
CE marking products ............................................................................. vi
1. INTRODUCTION AND GENERAL DESCRIPTION .......................1-1
1.1 Instrument check ..............................................................................1-1
1.2 Application.........................................................................................1-2
2. GENERAL SPECIFICATIONS........................................................2-1
3. INSTALLATION AND WIRING........................................................3-1
3.1 Installation and dimensions ............................................................3-1
3.1.1 Installation site .............................................................................................3-1
3.1.2 Mounting methods .......................................................................................3-1
3.2 Wiring .................................................................................................3-4
3.2.1 Preparation ..................................................................................................3-4
3.2.2 Cables, Terminals, glands and conduit adapter ..........................................3-5
3.3 Wiring the power supply ..................................................................3-7
3.3.1 General precautions .................................................................................... 3-7
3.3.2 Access to terminal and cable entry..............................................................3-8
3.3.3 AC power .....................................................................................................3-8
3.3.4 DC power .....................................................................................................3-8
3.3.5 Grounding the housing ................................................................................3-9
3.3.6 Switching on the instrument.........................................................................3-9
3.4 Wiring the contact signals .............................................................3-10
3.4.1 General precautions ..................................................................................3-10
3.4.2 Contact outputs..........................................................................................3-10
3.4.3 Contact input.............................................................................................. 3-11
3.5 Wiring the mA-output signals........................................................3-11
3.5.1 General precautions .................................................................................. 3-11
3.5.2 Analog output signals ................................................................................ 3-11
3.6 Wiring the sensor system ..............................................................3-11
3.6.1 General precautions......................................................................................... 3-11
3.6.2 Sensor wiring .............................................................................................3-12
3.6.3 Othersensorsystems................................................................................3-12

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<TABLE OF CONTENTS>
3.6.4 Sensorcableconnectionsusingjunctionbox(BA10)andextensioncable
(WF10)..................................................................................................3-13
4. OPERATION....................................................................................4-1
4.1 Main display functions .....................................................................4-1
4.2 Trending graphics .....................................................................4-1
4.3 Zoom in on details .....................................................................4-2
4.3.1 Actual mA1...................................................................................................4-2
4.3.2 Actual mA2...................................................................................................4-2
4.3.3 S1/S2/S3/S4 ................................................................................................4-2
4.3.4 C.C.(factory)................................................................................................4-3
4.3.5 C.C.(adjusted).............................................................................................4-3
4.3.6 Temp. comp 1 ..............................................................................................4-3
4.3.7 Temp.comp2 ..............................................................................................4-3
4.3.8 Polarization ..................................................................................................4-3
4.3.9 Sensor ohms................................................................................................4-3
4.3.10Lastcalibratedat..........................................................................................4-3
4.3.11 Calibration due at.........................................................................................4-3
4.3.12 Projected calibration at ................................................................................4-3
4.3.13 HART ID.......................................................................................................4-4
4.3.14 Software revision .........................................................................................4-4
4.3.15 HART Device revision.................................................................................. 4-4
4.3.16Logbook .......................................................................................................4-4
4.4 Information function .........................................................................4-5
4.5 Setup-calibration & commissioning ...............................................4-5
4.6 Secondary-primary value display switch.......................................4-5
4.7 Navigation of the menu structure ...................................................4-6
5. MENU STRUCTURE COMMISSIONING .......................................5-1
5.1 Conguresensor ..............................................................................5-1
5.2 Temperature setting..........................................................................5-2
5.3 Temperature compensation.............................................................5-2
5.4 Calibration settings ..........................................................................5-4
5.5 Concentration....................................................................................5-4
5.6 mA output setup................................................................................5-6
5.7 Contact output setup......................................................................5-10
5.8 Fail ....................................................................................................5-12
5.9 Simulate ...........................................................................................5-14
5.10 Water for Injection Monitoring (USP 645 and EU 0169) ..............5-14
5.11 Input contacts..................................................................................5-16

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<TABLE OF CONTENTS>
5.12 Errorconguration .........................................................................5-16
5.13 Logbookconguration...................................................................5-18
5.14 Advanced setup ..............................................................................5-18
5.15 Display setup...................................................................................5-19
6. CALIBRATION ................................................................................6-1
6.1 Cell constant manual........................................................................6-1
6.2 Cell constant automatic ...................................................................6-1
6.3 Air (zero) calibration ........................................................................6-1
6.4 Sample calibration ............................................................................6-2
6.5 Temperaturecoefcientcalibration................................................6-2
6.6 Temperature calibration ..................................................................6-2
6.7 Operation of hold function during calibration...............................6-2
6.8 General comments on SC calibration.............................................6-2
7. MAINTENANCE ..............................................................................7-1
7.1 Periodic maintenance.......................................................................7-1
7.2 Periodic maintenance of the sensor...............................................7-1
7.3 Cleaning methods.............................................................................7-2
7.4 LCD adjustment ................................................................................7-2
8. TROUBLESHOOTING....................................................................8-1
8.1 Calibration check ..............................................................................8-1
8.2 Polarization check ............................................................................8-1
8.3 Predictive maintenance....................................................................8-2
8.4 Prediction of cleaning needed.........................................................8-2
8.5 Poor calibration technique ..............................................................8-2
8.6 Error displays and actions...............................................................8-2
APPENDICES .................................................................................. APP-1
Appendix 1 Temperature compensation .........................................................APP-1
Appendix 2 TDS readings ...............................................................................APP-5
Appendix 3 Calibration solutions for conductivity ...........................................APP-5
Appendix 4 Sensor selection for the SC450G ................................................APP-7
Appendix 5 HowtoenterthecellconstantfortheSC21□G,SC8SG,andSC4AJ ...APP-9
Appendix6 HARTHHT(275/375)menustructure .........................................APP-9
Appendix7 ControldrawingforFMapproval............................................... APP-13
Customer Maintenance Parts List ...................... CMPL 12D08N05-02E
Revision Record ....................................................................................... i

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<1. INTRODUCTION AND GENERAL DESCRIPTION>
1. INTRODUCTION AND GENERAL
DESCRIPTION
The Yokogawa SC450G is a converter designed for industrial process monitoring,
measurement and control applications. This instruction manual contains the information
needed to install, set up, operate and maintain the unit correctly. This manual also includes
a basic troubleshooting guide to answer typical user questions.
Yokogawa can not be responsible for the performance of the SC450G converter if these
instructions are not followed.
1.1 Instrument check
Upon delivery, unpack the instrument carefully and inspect it to ensure that it was not
damaged during shipment. If damage is found, retain the original packing materials
(includingtheouterbox)andthenimmediatelynotifythecarrierandtherelevantYokogawa
salesofce.
Makesurethemodelnumberonthenameplateafxedtothesideoftheinstrumentagrees
with your order. Example of the nameplate is shown below.
Figure 1.1 Nameplate
NOTE
• Thenameplatewillalsocontaintheserialnumberandanyrelevantcertification
marks.Besuretoapplycorrectpowertotheunit,asdetailedonthenameplate.
• Referto“ControldrawingforFMapproval”ofAppendix4incaseofOptioncodeis“-U
(FMversion)”ofModelandSufxCodes.
• Whencontactoutputcurrentismorethan4Amps.ambienttemperatureshouldbe
less than 40ºC.

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<1. INTRODUCTION AND GENERAL DESCRIPTION>
1.2 Application
The SC450G converter is intended to be used for continuous on-line measurement of
Conductivity,Resistivityand/orConcentrationinindustrialinstallations.Theunitcombines
simple operation and microprocessor-based performance with advanced self-diagnostics
and enhanced communications capability to meet the most advanced requirements. The
measurement can be used as part of an automated process control system. It can also be
used to indicate operating limits of a process, to monitor product quality, or to function as a
controllerforadosing/dilutionsystem.
Sensors should normally be mounted close to the converter in order to ensure easy
calibration and peak performance. If the unit must be mounted remotely from the sensors,
WF10extensioncablecanbeused,uptoamaximumof50metres(150feet),withaBA10
junction box, and up 10 metres standard sensor cable.
The SC450G is delivered with a general purpose default setting for programmable items
(seeChapter5).Whilethisinitialconfigurationallowseasystart-up,theconfiguration
should be adjusted to suit each particular application. An example of an adjustable item
is the type of temperature sensor used. The SC450G can be adjusted for a number of
different types of temperature sensors.
Details provided in this instruction manual are sufficient to operate the SC450G with all
Yokogawa sensor systems and a wide range of third-party commercially available probes.
For best results, read this manual in conjunction with the corresponding sensor instruction
manual.
Yokogawa designed the SC450G converter to withstand industrial environments. It meets
alltheCEregulatorystandards.Theunitmeetsorexceedsstringentrequirements(see
Chapter2)withoutcompromise,toassuretheuserofcontinuedaccurateperformancein
even the most demanding industrial installations.

IM 12D08N05-01E
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<2. GENERAL SPECIFICATIONS>
2. GENERAL SPECIFICATIONS
Inputspecications:
Two or four electrodes measurement with square wave excitation, using max
60m(200ft)cable(WU40/WF10)andcellconstantsfrom0.005to50.0cm-1
Input ranges:
 Conductivity: 0.000μS/cmto2000mS/cm
  Minimum:1μS/cm(underrange0.00μSxC)
  Maximum:200mS/cm(overrange2000mSxC)
 Resistivity: 0.0Ωxcmto1000MΩxcm
  Minimum:5Ω/cm(underrange0.0Ω/C)
  Maximum:1MΩ/cm(overrange1000MΩ/C)
Note: “C”meanscellconstant.
 Temperature: Pt1000  -20to250ºC(0to500ºF)
   Pt100  -20to200ºC(0to400ºF)
   Ni100  -20to200ºC(0to400ºF)
   NTC8k55 -10to120ºC(10to250ºF)
   Pb36(JISNTC6k) -20to120ºC(0to250ºF)
Accuracy:
 Conductivity/resistivity: ≤0.5%ofreading
 Temperature:  ≤0.3ºC(≤0.4ºCforPt100)
 Stepresponse:  ≤4secondsfor90%(fora2decadestep)
 Noteonperformancespecications
The following tolerance is added to above performance.
  mAoutputtolerance:±0.02mAof“4-20mA”
Transmission signals:
General; Two isolated outputs of 4-20 mA. DC with common negative.
Maximumload600Ω.Bi-directionalHART®(HART5)digital
communication,superimposedonmA1(4-20mA)signal.
 Outputfunction; Linearor21-steptableforConductivity/Resistivity,Concentration
or Temperature.
Control function; PID control
 Burnoutfunction; Burnup(21.0mA)orburndown(3.6mA)tosignalfailureacc.
NAMUR NE43.
Parameters; Adjustable damping
Expire time
 Hold;  ThemA-outputsarefrozentothelast/xedvalueduring
calibration/commissioning.
Contact outputs:
General; Four SPDT relay contacts with display indicators. Contact outputs
congurableforhysteresisanddelaytime.
 Switchcapacity; Maximumvalues100VA,250VAC,5Amps.(*1)
   Maximumvalues50Watts,250VDC,5Amps.(*1)
 Status;  High/Lowprocessalarms,selectedfromconductivity,resistivity,
concentration or temperature.
Congurabledelaytimeandhysteresis.
PID duty cycle or pulsed frequency control.
FAILalarm

IM 12D08N05-01E
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<2. GENERAL SPECIFICATIONS>
 Controlfunction; On/Off
Adjustable damping
Expire time
Hold; Contact can be used to signal the Hold situation.
Fail safe; Contact S4 is programmed as failsafe contact.
*1: Whencontactoutputcurrentismorethan4Amps,ambienttemperatureshouldbelessthan
40 ºC.
Contact input:
Remote range switching to 10 times the programmed range.
 Contactopen; Ifimpedance>100kΩ:1xRange
   (WhenprogrammedrangeformAoutputisconductivity).
 Contactclosed; Ifimpedance<10Ω:10xRange
Temperature compensation:
 Function;  Automaticormanual,fortemperaturerangesmentionedunderB
(inputs).
 Referencetemp.; programmablefrom0to100ºCor30to210°F(default25ºC).
Compensation algorithm:
  AccordingIEC60746-3NaCltables(default).Twoindependentuser
programmabletemperaturecoefcients,from0%to3.5%perºC(ºF)by
adjustment or calibration.
 Matrixcompensation: Withconductivityfunctionofconcentrationand
temperature. Choice out of 13 preprogrammed
matrixes and 2 100-points user-programmable
matrixes.
Calibration:
  Semi-automaticcalibrationusingpre-conguredOIML(KCl)stanardtables,
with automatic stability check. Manual adjustment to grab sample.
Logbook:
Software record of important events and diagnostic data readily available in
the display or through HART®.
Display:
  GraphicalQuarterVGA(320x240pixels)LCDwithLEDbacklightand
touchscreen. Plain language messages in English, German, French,
Spanish,Italian,Swedish,PortugueseandJapanese.
Form:
 Dimension; 144(W)x144(H)xApprox.144(D)mm
Converter weight; Approx. 1.5 kg
Housing:
Cast Aluminum housing with chemically resistant coating;
   PolycarbonatecoverwithPolycarbonateexiblewindow
  ProtectionIP66/NEMA4X/CSAType3S
Colour; Silver grey
 SC450G-A(D)-A: IP66cableglandsaresuppliedwiththeunit
 SC450G-A(D)-U: NEMA4Xcloseupplugsaremountedintheunusedcableentry
holes and can be replaced by conduit fittings as required Pipe,
Panel or Wall mounting using optional hardware
 Optionalconduitadapter; G1/2,1/2NPTorM20female
Power supply:
 SC450G-A:

IM 12D08N05-01E
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<2. GENERAL SPECIFICATIONS>
  Ratings;  100-240VAC
  Acceptablerange; 90to264VAC
  Ratings;  50/60Hz
  Acceptablerange; 50Hz±5%,60Hz±5%
Power Consumption;  15VA
 SC450G-D:
  Ratings;  12-24VDC
  Acceptablerange; 10.8to26.4VDC
Power Consumption; 10 W
Safety, EMC and RoHS conforming standards
Safety: EN61010-1
EN 61010-2-030
EN 61010-2-201
  CAN/CSAC22.2No.61010-1
  CAN/CSAC22.2No.61010-2-030
  CAN/CSAIEC61010-2-201
  UL61010-1
  UL61010-2-030
  UL61010-2-201
 EMC: EN61326-1ClassA,Table2*1
EN 61326-2-3
EN 61000-3-2 Class A
EN 61000-3-3
  RCM:EN61326-1ClassA
  KoreaElectromagneticConformityStandard
*1: Inuenceofimmunityenvironment(CriteriaA):Outputshiftisspeciedwithin±35%ofF.S.
Note: ThisinstrumentisaClassAproduct,anditisdesignedforuseintheindustrialenvironment.
Please use this instrument in the industrial environment only.
 RoHS: EN50581
 FMnonincendiveapproval(sufxcodeType:-U):
   FM3611ClassI,Div.2,GroupABCD,T6forTa-20to55ºC
 Installationaltitude:2000morless
 CategorybasedonIEC61010:II(Note)
 PollutiondegreebasedonIEC61010:2(Note)
Note: Installationcategory,calledover-voltagecategory,speciesimpulsewithstandvoltage.Category
II is for electrical equipment. Pollution degree indicates the degree of existence of solid, liquid,
gas or other inclusions which may reduce dielectric strength. Degree 2 is the normal indoor
environment.
Environment and operational conditions:
Ambient temperature; -20 to +55ºC
Storage temperature;  -30to+70ºC
 Humidity;  10to90%RH(non-condensing)
 Dataprotection; EEPROMforconfigurationdataandlogbook.Lithiumcellfor
clock.
Watchdog timer; Checks microprocessor
Power down; Reset to measurement.
Automatic safeguard; Auto return to measuring mode when touchscreen is untouched
for 10 min.

IM 12D08N05-01E
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<2. GENERAL SPECIFICATIONS>
ModelandSufxCodes
[Style: S2]
Model Sufxcode Option code Description
SC450G ---------------- ----------------- Conductivity Converter
Power - A
- D
-----------------
-----------------
ACversion(100…240VAC)
DCversion(12…24VDC)
Type - A
- U
-----------------
-----------------
General purpose version
FMversion(*3)
Mounting Hardware
Hood
Conduit adapter
Tag Plate
/UM
/U
/PM
/H5
/AFTG
/ANSI
/AM20
/SCT
Universalmountingkit(panel,pipe,wall)
Pipeandwallmountinghardware(*2)
Panel mounting hardware (*2)
Awninghood(stainlesssteel)(*2)
G1/2(*2)
1/2NPT(*2)
M20(*2)
Stainlesssteeltagplate(*1)
Notes: *1 Ifthetagnumberispredefinedwiththepurchase,Yokogawawillinscriptthetagplatewiththespecifiedtag
number, and program the tag number in the converter.
 *2 Optioncodes/U,/PM,/H5,/AFTG,/ANSIand/AM20arenotspeciedforFMversion(-U).
*3 Nonincendive for FM only.

IM 12D08N05-01E
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<3. INSTALLATION AND WIRING>
3. INSTALLATION AND WIRING
3.1 Installation and dimensions
3.1.1 Installation site
The SC450G converter is weatherproof and can be installed inside or outside. It should,
however, be installed as close as possible to the sensor to avoid long cable runs between
sensorandconverter.Inanycase,thecablelengthshouldnotexceed60metres(197
feet).
Selectaninstallationsitewhere:
• Mechanicalvibrationsandshocksarenegligible
• Norelay/powerswitchesareinthedirectenvironment
• Accessispossibletothecableglands(seegure3.1)
• Theconverterisnotmountedindirectsunlightorsevereweatherconditions
• Maintenanceproceduresarepossible(avoidingcorrosiveenvironments)
The ambient temperature and humidity of the installation environment must be within the
limitsoftheinstrumentspecications.(Seechapter2).
3.1.2 Mounting methods
Refer to figures 3.2 and 3.3. Note that the SC450G converter has universal mounting
capabilities:
• Panelmountingusingoptionalbrackets
• Surfacemountingonaplate(usingboltsfromtheback)
• Wallmountingonabracket(forexample,onasolidwall)
• PipemountingusingabracketonahorizontalorverticalpipeSizenominal50A

IM 12D08N05-01E
3-2
<3. INSTALLATION AND WIRING>
Unit: mm (inch)
220(8.66")184(7.2")
72(2.8")
A
D E F
B C A : For output signal
B : For contact input
C : For sensor cable
D : For contact output (S1 and S2)
E : For contact output (S3 and S4)
F : For power supply
Adapter
49
(1.93")
G1/2 screw (/AFTG), 1/2 NPT screw (/ANSI)
M20 screw (/AM20)
Approx.
55(2.2")
144(5.67")
144(5.67")
20
(0.79")
20
(0.79")
121.5(4.78") 24.5(1")
 Adapter for Conduit Work (optional)
(option code : / AFTG, / ANSI, / AM20)
4x M6 screw
depth 7
M20 cable gland
(When shipped, not installed)
Grounding terminal (M4 screw)
 Hood (Option code: /H5, some cutout on the left side cover)
Figure 3.1 Housing dimensions and layout of glands