Omega Engineering 873C Manuale utente

r\:OMEGA

^^^^HFiyniiyFFDii\iGiiur

EIMGIIMEERIIMCIIMC.

In0>lf."f»t lirwupCompany

MODEL873

HandHeldDigital

Thermometer

Operator'sManual

WARRANTY

OI\^EGAwarrantsthisunittobefreeofdefectsinmaterialsandworkmanship

and

givesatisfactoryservicefor

periodof

one(1)

year

from

dateofpurchase.

Iftheunitsfiouldmalfunction,itmustbereturnedtottiefactoryforevaluation.

OurCustomerServiceDepartmentwillissue

AuthorizedReturn(AR)number

immediatelyuponphoneorwrittenrequest.UponexaminationbyOMEGA,it

theunitisfound tobedefectiveitwillberepairedorreplacedatnocharge.

However,thisWARRANTYisVOIDiftheunitshowsevidenceofhavingbeen

tamperedwithorshowsevidenceofbeingdamagedasa resultofexcessive

current,heat,moisture,vibration,ormisuse,(Componentswhichwearorwhich

aredamagedbymisusearenot

warranted.

Theseincludecontact

points,

fuses,

andtriacs.

THEREARE

WARRANTIESEXCEPTASSTATED

HEREIN.

THEREARENO

OTHERWARRANTIES,EXPRESSEDORIMPLIED,INCLUDINGBUTNOT

LIMITEDTOTHEIMPLIEDWARRANTIESOFMERCHANTABILITYANDOF

FITNESSFORA PARTICUUR PURPOSE.INNOEVENTSHALLOMEGA

ENGINEERING,INC.BELIABLEFORCONSEQUENTIAL,INCIDENTALOR

SPECIAL

DAMAGES.

THEBUYER'S

SOLE

REMEDY

FOR

ANY

BREACHOFTHIS

AGREEMENTBYOMEGAENGINEERING,INC.ORANYBREACHOFANY

WARRANTYBYOMEGAENGINEERING,INC.SHALLNOTEXCEEDTHE

PURCHASE

PRICEPAIDBYTHE

PURCHASER

TOOMEGA

ENGINEERING,

INC.

FORTHEUNITORUNITSOREOUIPMENTDIRECTLYAFFECTEDBYSUCH

BREACH.

ReturnRequests/Inquiries

Directallwarrantyandrepairrequests/inquiriestoOMEGACustomerService

Department,telephonenumber

(203)

359-1660.

Beforereturninganyinstrument,please

contacttheOMEGACustomerServiceDepartmenttoobtainanauthorizedreturn(AR)

numtier.ThedesignatedARnumber

should

thenbemarked

theoutsideof

the

return

package.

Toavoidprocessingdelays,alsopleasebesuretoInclude:

Returnee'sname,address,andphonenumber.

ModelandSerialnumbers.

3.Repairinstructions.

i^OMEGA

A..^H

ENGiniEERING,

IIMC

OneOmegaDrive,Box4047

Stamford,

Connecticut06907-(X)47

(203)359-1660Telex:996404Cable:OMEGA

FAX:(203)359-7700

OMEGA'-'isa registeredtrademarkofOMEGAENGINEERING,INC.

illustrations.Nothinginthismanualmaybereproducedinanymanner,eitherwholly

orinpartforanypurposewhatsoeverwithoutwrittenpermissionfrom

OMEGAENGINEERING,INC.

Printedin

U.S.A.

M230/025

TABLEOFCONTENTS

GENERALINFORMATION1

UnpackingandInspection1

OptionalAccessories2

PreparationforUse3

SafetySymbols

and

Terms4

EnvironmentalConditions4

OPERATION5

SafetyPrecautions6

SERVICINGINFORMATION9

FunctionalityCheck9

PerformanceVerification9

EnvironmentalConditions10

DisassemblyInstructions10

BatteryInstallation/Replacement12

Calibration13

ProbeMatching15

Troubleshooting...:15

SpecialHandlingofStaticSensitiveDevices18

ComponentLayout21

SchematicDiagram23

GENERALINFORMATION

TheOI^EGA®IVIodels873Cand873FareHandHeldDigitalThermo-

meters.Bothinstrumentshavelargeeasytoreadliquidcrystaldisplays

(LCD).

Theinputconnectionconsistsof

subminiature,type

thermo-

couple,femaleconnector(SMP-K-F).Thisinputaccommodatesany

OMEGAtype

thermocoupleprobefittedwithanSMP-K-Mconnec-

tor.Coldjunctionelectroniccircuitry

the873F/873Cautomatically

compensatesforambienttemperaturechanges.Theseinstruments

alsoprovidepiece-wiselinearizationconformityforthermocouplenon-

linearity.Theinstrumentsarepoweredbya 9Vbattery.Continuous

operationof350hoursistypicalwithanalkalinebatteryor200hours

typicalwithacarbon-zincbattery.

TheModel873Cmeasurestemperaturefrom- 55°Cto1000°Con

tworanges.The200°Crangemeasurestemperaturefrom-55.0°Cto

199.9°Cwitha resolutionof0.1°C.The1000°Crangemeasures

temperaturefrom-55°Cto1000°Cwitha resolutionof1°C.Theac-

curacyis± (0.25%rdg

-i-

1.0°C)

from-40°Cto1000°Cand± (0.25%

ofrdg-l-2°C)for-40°Cto-55°C.

TheModel873Fmeasurestemperaturefrom- 60°Fto200°F

two

ranges.The200°Frangemeasurestemperaturefrom-60.0°Fto

199.9°Fwitha resolutionof0.1°F.The2000°Frangemeasures

temperaturefrom-60°Fto1999°Fwitha resolutionof1°F.Theac-

curacyoftheModel873°Fis±(0.25%ofrdg-i-2.0°F).

UNPACKINGANDINSPECTION

RemovethePackingListandverifythatallequipmenthasbeen

received.

Ifthereareanyquestionsabouttheshipment,pleasecall

OMEGACustomerServiceDepartmentat(203)359-1660.

Uponreceiptofshipment,inspectthecontainerandequipmentfor

anysignsofdamage.Takeparticularnoteofanyevidenceofrough

handlingintransit.Immediatelyreportanydamagetotheshipping

agent.

NOTE

Thecarrierwillnothonoranyclaimsunlessallshipping

materialissavedfortheir

examination.

Afterexaminingand

removingcontents,savepackingmaterialandcartoninthe

eventreshipmentisnecessary.

OPTIONALACCESSORIES

Thefollowingoptionalaccessoriescan

usedwiththeModels873C

and873Ftoenhancetheperformanceoftheinstrument.These

accessoriesareavailable:

PartNumber

KS871

SC800

880A2

MN1604

SMP-K-M

SMP-K-F

OT-201-1

Description

TiltStand/BeltClip/ProbeHolder;can

beusedasatiltstandorclippedto

yourbelt.Itwillholdonecompact

probe.

SoftCarryingCase

DeluxeCarryingCase

9VReplacementBattery

SubminiatureThermocoupleConnec-

tor,Male

SubminiatureThermocoupleConnec-

tor,Female

1ozjarofHighThermalConductivity

Pasteforfastsurfacemeasurements.

PREPARATIONFORUSE

TheModels873Fand873Caresuppliedreadyforusewithbattery

installed.

ConnecttheappropriateprobetotheminiatureTCconnec-

torlocatedonthetopoftheinstrument(justabovethedisplay).

SAFETYSYMBOLSANDTERMS

Thesymbol/!\ontheinstrumentdenotesthattheusershouldrefer

totheopjeratinginstructions.

TheWARNINGusedinthismanualexplainsdangersthatcouldresult

inpersonalinjuryordeath.

TheCAUTIONusedinthismanualexplainshazardsthatcould

damagetheinstrument.

ENVIRONMENTALCONDITIONS

OperationoftheModels873Cand873Fshouldtakeplaceat

am-

bienttemperatureof-10°Cto50°C(14°Fto122°F),lessthan80%

relativehumidityupto35°C,lineariyderate3%

R.H./C

from35°Cto

60°C.

OPERATION

The873Cand873FHandHeldDigitalThermometersareeasytouse

Thereisonlyonecontrol(locatedonthesideoftheinstrument)that

turnstheinstrumenton/offandselectstherange.(SeeFigures

and

2).

Usethefollowingproceduretooperatetheinstrument:

Turnonthepowertotheinstrumentbyselectingthedesiredrange.

Model873C:

A.200°CrangeisthecenterpositionoftheON/OFFrangeswitch.

B.1000°CrangeistheupperpositionoftheON/OFFrangeswitch.

Model873F:

A.200°FrangeisthecenterpositionoftheON/OFFrangeswitch.

B.2000°FrangeistheupperpositionoftheON/OFFrangeswitch.

Selecttheappropriatetemperatureprobeandinsertitintotheinput

jack.

3.Makethemeasurement:

A.Touchtheprobetiptothematerialtobemeasured.

B.Readthedisplay.ThereadingisinCelsiusfortheModel873C.

ThereadingisinFahrenheitfortheModel873F.

NOTE

Anopensensororoverrangeconditionisindicatedby:

CAUTION

Donotattempttomeasuretemperaturesbeyond

therangeoftheprobebeingused.Probedamage

mayoccur.

WARNING

AshockhazardexistsontheModels8730and873F

Inputjackswhenprobes

sensorsareexposed

voltagelevelsgreaterthan42Vpeaktoearthground.

SAFETYPRECAUTIONS

Donottouchtheprobetipwhenmeasuringexcessivelyhighorlow

temperature.

Donotexceed42Vpeakfromtheprobetiporinputjacktoearth

ground.

MiniatureTCConnector

LowBatteryIndicator

MinusSignDisplayed

•

PlusSignImplied

3V4DigitDisplay—

On/OffRangeSwitch

OMEGA873CTHERMOMETER

BAT

-loao

200

TYPE

THEHMOCOUPLE

NiCr-N<AI

RANOE:

-IB'C

lOOO'C

^42VMAX

Figure1.Model873CControlLayout

MiniatureTCConnector

LowBatteryIndicator^

MinusSignDisplayed-

PlusSignImplied

VADigitDisplay-

On/OffRangeSwitch

OMEGA873FTHEHMOMETER

rDMI

-\QO.U

TYPE

THEIIMOCOUPI.E

NiCr-NiAl

RANOE.

-tO'E

2000*F

A42VMAX

Figure2.Model873FControlLayout

SERVICINGINFORMATION

ThissectioncontainsinformationneededtomaintaintheModels

873Cand873RThefollowinginformationisincluded:functional

check,performanceverification,disassemblyinstructions,batteryin-

stallation/replacement,calibration,probematching,troubleshooting,

partslist,schematicdiagramandcomponentlayout.

WARNING

Theinformationpresentedinthissectionisin-

tendedforusebyqualifiedpersonnelonly.Turnoff

thepowerandremoveallprobesfromtheinstru-

mentbeforereplacingthebattery.

FUNCTIONALITYCHECK

Atroomtemperatureholdthetipofa probesensorbetweenyour

thumbandindexfinger.A readingbetween25°Cand40°C(77°Fand

104°F)shouldbeobservedtoconfirmfunctionalityoftheinstrument.

PERFORMANCEVERIFICATION

AccuracyCheck

Preparea distilledwatericebathoruseanOMEGA*TRCIIIIce

PointReferenceChamber.

Connecta TCprobetotheinputjackoftheinstrument.

3.ImmersetheTCprobeintotheTRCIIIordistilledwatericebath

andallow10minutesforthermalstabilization,

TurnontheinstrumentanduseTable

toverifythatthereadings

oneachrangearewithinspecifications.

Table1.PerformanceVerification

Range

200

1000

2000

873°C

0.0± 1°C

0± 1°C

873°F

32,0± 2°F

32± 2°F

ENVIRONMENTALCONDITIONS

TheModels873Cand873Fshouldbeatanambienttemperatureof

23°C±1°Canda relativehumidityoflessthan80%.

DISASSEMBLYINSTRUCTIONS

WARNING

Turnofftheinstrumentanddisconnectthe

temperatureprobebeforeremovingthebottom

cover.

NOTE

Whendisassemblingtheinstrument,handlethePC

boardbytheedges.Body

oil,

dirt,etccandegradecircuit

performance.KeepthePCboardcleanandfreeof

con-

taminants.

Placetheunitfacedownona benchorothersimilarsurfaceand

removethescrewsfromthebottomcover.

Separatethebottomcoverfromtherestoftheinstrumentby

graspingthetopofthecase(justabovethedisplay)andcarefully

liftingitawayfromthedisplay.

3.Removethebattery.

Removethestandoff(ST-166-1)thatsecuresthePCboardtothe

case.

ThestandoffislocatedinthecenterofthePCboard.

5.Removetheswitchcap.

6.LiftthePCboardoutofthetopcover(frontpanel)

7.Removetheshield.

8.TheLCDisheldinplaceonthePCboardbya shockresistant

mountingandisassembledasshowninFigure3.

9.Toreassembletheunit,reversetheaboveprocedure.

CAUTION

Whenremovingthe

LCD

fromthePCboardbecareful

nottospreadthefourretaininghooks

theclearplastic

bezelouttoofar.Theplasticbezelhooksmayfracture.

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