6290 - aemc instruments€¦ · 6 micro-ohmmeter model 6290 chapter 2 product features 2.1...

200A MICRO-OHMMETER 6290

E N G L I S H User Manual

Statement of Compliance

Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments certifies that this instrument has been calibrated using standards and instruments traceable to international standards.

We guarantee that at the time of shipping your instrument has met its published specifications.

An NIST traceable certificate may be requested at the time of purchase, or obtained by returning the instrument to our repair and calibration facility, for a nominal charge.

The recommended calibration interval for this instrument is 12 months and begins on the date of receipt by the customer. For recalibration, please use our calibration services. Refer to our repair and calibration section at www.aemc.com.

Serial #: ________________________________

Catalog #: 2129.82

Model #: 6290

Please fill in the appropriate date as indicated:

Date Received: _________________________________

Date Calibration Due: _______________________

Chauvin Arnoux®, Inc.d.b.a AEMC® Instrumentswww.aemc.com

Micro-Ohmmeter Model 6290 1

Table of Contents

1. INTRODUCTION ............................................................................... 31.1 International Electrical Symbols ................................................41.2 DefinitionofMeasurementCategories .....................................41.3 ReceivingYourShipment ..........................................................41.4 OrderingInformation .................................................................5

1.4.1 AccessoriesandReplacementParts ............................5

2. PRODUCT FEATURES ...................................................................... 62.1 Description ................................................................................62.2 Features ....................................................................................72.3 Applications ..............................................................................72.4 ControlFeatures .......................................................................82.5 Display ......................................................................................9

2.5.1 AnalogBargraph ...........................................................92.5.2 Built-inChronometer .....................................................92.5.3 Real-timeClock.............................................................92.5.4 TestNumber .................................................................92.5.5 ModelandSerialNumber .............................................9

2.6 DisplayMessages ...................................................................10

3. OPERATION .................................................................................. 123.1 Protection ................................................................................12

3.1.1 StartwithI=O ............................................................123.1.2 TemperatureProtection ..............................................12

3.2 UseofTestProbes .................................................................123.3 Operating ................................................................................133.4 InternalMemory ......................................................................16

4. MAINTENANCE ............................................................................. 174.1 Warning...................................................................................174.2 Cleaning ..................................................................................174.3 FuseReplacement ..................................................................18

2 Micro-Ohmmeter Model 6290

5. SPECIFICATIONS........................................................................... 19

RepairandCalibration ...........................................................................20TechnicalandSalesAssistance ............................................................20Limited Warranty ...................................................................................21WarrantyRepairs ...................................................................................21


CHAPTER 1

INTRODUCTION

WARNINGThese safety warnings are provided to ensure the safety of personnel and proper operation of the instrument.

• Donotattempttoperformanytestswiththisinstrumentuntilyouhave read the user manual.

• Tests are to be carried out on de-energized circuits only! Neverconnecttheunittoalivecircuit.

• Themicro-ohmmetermustbeconnectedtotheearth/groundpoint,throughthegreenterminalorthepowercord.

• Duringacircuitbreakermeasurementitscontactsmustbeclosedandconnectedtoanearth/groundpoint.Theendconnectedtoanearth/groundpointmustbeconnectedtothe“C-”terminal.

• Ensure the terminals are free of any voltage in relation to earth/groundpoint andbetweeneachother.Take intoaccount that ina substationyouwill find, indisconnectedpoints, highpotentiallevels in relation to the earth/groundpoint. Those potentials arecaused by presence of electromagnetic fields and can bemini-mizedfollowingtheindicationsintheparagraphbefore.

• Makesurethatthecurrentconnectionsarewellconnected,aswellastheCclamp,toavoidundesirableheating.

• Becarefulwhenmanipulating thecurrent terminals in the instru-ment.Hightemperaturesmayoccurinthecurrentconnections.

• Neverconnectordisconnectthecablesduringameasurement.Ifamodificationmustbemade,presstheStopbuttonfirst.

• Themicro-ohmmetershouldneverbeused inanexplosiveenvi-ronment(thisincludespoorlyventilatedbatteryroomsandenclo-sures).

• The instrument, test leads andmeasuringwiresmust be free ofdefectsandshouldbechangedifthereisanyevidenceofdeterio-ration(insulationsplit,burnt,etc.).

• Neverexceedthesafetyvaluesindicatedinthespecifications.


1.1 International Electrical Symbols

This symbol signifies that the instrument is protected by double or rein-forced insulation.CAUTION - Risk of Danger! Indicates a WARNING and that the operator must refer to the user manual for instructions before operating the instrument in all cases where this symbol is marked.

Important instructions to read and understand completely.

Important information to acknowledge.

Risk of electric shock. The voltage at the parts marked with this symbol may be dangerous.

Ground/Earth symbol

Compliance with the Low Voltage & Electromagnetic Compatibility European directives (73/23/CEE & 89/336/CEE)

In the European Union, this product is subject to a separate collection system for recycling electrical and electronic components In accordance with directive WEEE 2002/96/EC

1.2 Definition of Measurement CategoriesCAT IV: For measurements performed at the primary electrical supply

(<1000V) such as on primary overcurrent protection devices, ripple control units, or meters.

CAT II: Formeasurementsperformedoncircuitsdirectlyconnectedtotheelectricaldistributionsystem.Examplesaremeasurementsonhouseholdappliancesorportabletools.

CAT III: For measurements performed in the building installation atthedistribution level suchasonhardwiredequipment infixedinstallationandcircuitbreakers.

1.3 Receiving Your ShipmentUponreceivingyourshipment,makesurethatthecontentsareconsistentwith thepacking list.Notify yourdistributor of anymissing items. If theequipmentappearstobedamaged,fileaclaimimmediatelywiththecar-rierandnotifyyourdistributoratonce,givingadetaileddescriptionofanydamage.Savethedamagedpackingcontainertosubstantiateyourclaim.


1.4 Ordering Information

Micro-ohmmeter Model 6290 ...........................................Cat. #2129.82Includes meter in hard carrying case, one accessory case, set of two Kelvin leads (20ft) w/ C-clamps, one green ground lead w/ clamp, USB cable (5ft), power cord (110V), fuse (5x20,12A), PC software, and user manual.

1.4.1 Accessories and Replacement Parts

Lead–Setof2,50ftColor-codedKelvinleads(red/black)withattachedC-Clamp .......................................................Cat. #2129.87

Lead–Replacement,10ftEarth/Ground(green)withattachedClamp ..........................................................Cat. #2129.88

Lead–Replacement,Setof2,20ft.Color-codedKelvinleads(red/black)withattachedC-Clamp ............................Cat. #2129.89

Fuse–Replacement,Setof5,12A,250V,5x20mm ...........Cat. #2129.90

Cable–5ftUSBcable ........................................................Cat. #2140.46

PowerCord,110VUS3-Prong,7ft ....................................Cat. #5000.40

Order Accessories and Replacement Parts Directly OnlineCheck our Storefront at www.aemc.com for availability


CHAPTER 2

PRODUCT FEATURES

2.1 DescriptionThe AEMC® high-current Micro-ohmmeter Model 6290 is a portable,microprocessor-controlled instrument. It has optimized filters andprotection formeasurements inelectricalsubstations.TheModel6290canbeusedtoaccuratelymeasureverylowcontactresistancesofhighvoltage circuit breakers, switches, busbars, etc., with test currents upto 200A. It employs the four-terminal Kelvinmethod to prevent errorscausedbytestleadsandtheircontactresistances.

Measurement accuracy is guaranteed through a state-of-the-art signalamplificationsystem,offset-freewithhighlong-termstability.Resistancereadings are shown in the alphanumeric display with up to 4½-digitresolution with display of measurement resistances up to 20mW, andresolution down to 0.1µW.

Testcurrentsmaybeadjustedbytheoperatorandaremeasuredusingananalogbargraphindicatoranddigitaldisplay.

TheModel6290hasaninternalmemoryforstoringupto200readings.TheUSB interfacemaybe connected to a computer todownload thestoredvaluesusingtheincludedapplicationsoftware.

Thehigh-currentgenerationsystemisbasedonmoderntechnologythatallows for a significant decrease in bothweight, 24.25 lbs (11kg), andsize.Thecaseismadeofhardplastic,makingithighlyresistanttoimpactand environmental conditions. Internal thermal sensors, in all sensitivecomponents,preventdamagetotheinstrumentcausedbyoverheating.

Thisisaruggedbutlightweightinstrument,andmaybeeasilycarriedbyoneperson.Itiswater-resistantandcanbeusedundersevereweatherconditions (IP54 with case closed) offering an excellent performanceworkingbothinthelaboratoryandoutinthefield.


2.2 Features• Accuratelymeasureslowcontactresistanceswithtestcurrents

up to 200A

• Measuresresistancesupto20mW

• Resolutionof0.1µW

• Analogbargraphindicatorwithdigitaldisplay

• Storesupto200testresults

• USBinterface

• Directprintoutusingsuppliedsoftware

• Rugged,light-weightandwater-resistant

2.3 Applications• Testswitchgearcontactresistance

• Testcircuitbreakercontactresistance

• Testairframebonding

• Testrailbonding

• Testpipelinebonding


2.4 Control Features

15

14

13

12

1110987

6

5

4

3

2

1

Figure 2-1

1. Currentoutputterminal(C+)

2. Potentialterminal(P+)

3. Alphanumericdisplay

4. Potentialterminal(P-)

5. Currentoutputterminal(C-)

6. Groundterminal

7. Rangeandtestcurrentselector

8. Savebutton

9. Startbutton

10. Stopbutton

11. Testcurrentcontrolknob

12. USBinterface

13. ON/OFFSwitch

14. Fuse

15. Powercordconnector


2.5 DisplayThe alphanumeric LCD display indicates the measurement result, thecorrespondingmeasuringunit,theelapsedtimesincethemeasurementstarted,theanalogbargraphanddigitalindicationoftestcurrent,andanymessages to the operator.

Figure 2-2

2.5.1 Analog BargraphTheinstrumentindicatesthetestcurrentvalueonthebargraphanddigitaldisplay.

2.5.2 Built-in Chronometer

Displaystheelapsedtime(inminutesandseconds)sincethetestcurrentwas applied.

2.5.3 Real-time ClockDisplaysdate,hoursandminutes,toassistintheidentificationoftestsrecordedinmemory.

2.5.4 Test NumberTestsareautomaticallynumberedandstoredwiththetestresults.

2.5.5 Model and Serial NumberAtthebeginningofeachtest,theinstrumentmodelandserialnumberareregistered,makingitpossibletologthetestresultswiththeirrespectiveinstrumentCalibrationCertificate.


2.6 Display Messages

Theintroductionscreenappearsmomentarily when the instrument is turned on.

Next,theinstrumentwilldisplayafunctionalcheckmessagewhileperforming initial start up.

“StartwithI=0”warnstheoperatorthattostartatest,theTestCurrentcontrolknobmustbeatthezeroposition(fullycounter-clockwise).Otherwise theStartbuttonwillbeinhibited.

Indicatesthattheinstrumentisreadytostartameasurement,bypressingtheStartbutton.

Indicatesthatthetestcurrentistoolowtocarryoutthemeasurement. It appears at thebeginningofeachtestandremains until the Test Current controlknobisadjustedinaclockwisedirectiontoanacceptablelevel.


WhenpressingtheSavebuttonthismessagewillbedisplayed,indicatingthatthemeasuredvalue was saved in internal memory.

Indicatesthatthemeasuredresistanceishigherthanthemaximumvaluereadableintheselectedrange.

Indicatesthatsomepartoftheinstrumenthasreachedcriticaltemperatureandthusthesystemwilldisabletestcurrentgeneration.


CHAPTER 3

OPERATION

3.1 Protection

3.1.1 Start with I = OQuickvariationsofcurrentmaycausedamagetosensitivecomponents.Topreventthis,theinstrumenthasabuilt-inprotectionthatrequiresthetesttostartatzerocurrent.OnlystartthemeasurementiftheTestCurrentcontrolknobisatthestart (fullycounter-clockwise)position. Ifnot, theStartbuttonwillbedisabledandthedisplaywillreadSTART WITH I=O. If theoperatorincreasesthetestcurrentbyquicklyturningtheTestCurrentcontrol knob clockwise, the instrument will automatically implement aslowcurrentincrease,totheselectedvalue.

3.1.2 Temperature ProtectionTheModel6290testtimeforcontinuoususeislimitedbythermalcondi-tions.Internalsensorsmeasurethetemperatureofsensitivecomponentsandtriggertheprotectionthatwillstopthetestcurrent,iftheyexceedthetemperaturelimit,preventinganydamage.TheOVERHEATING message willappearinthedisplay.Undertheseconditions,measurementswillbeinhibiteduntilthetemperaturedecreasessufficiently.

3.2 Use of Test Probes

WARNING: Only use the test leads supplied with the instrument, for mea-surement and calibration procedure.

• Makesurethatthecurrentconnectionsaresecurelyconnected,aswellastheC-clamps,toavoidundesirableheating.

• Payattentionwhenadjustingthecurrentterminalsoftheinstrument.Hightemperaturesmayoccurinthecurrentconnections.

• Makesurethattheleadsarenotcoiledduringthemeasurementtoavoid overheating.


3.3 Operating

WARNING: Before using this instrument read the user manual and safety warnings on page 3. Safety procedures and rules for working near high voltage energized systems must be observed during the use of this instrument. The generated voltages and currents may be dangerous.

TheMicro-ohmmeterModel6290usesthefour-terminalKelvinmethodtoprevent test lead resistance error duringmeasurement. Test currentmay be chosen by the operator and the reading is obtained by com-parisonthroughinternalhigh-stabilitystandards.Themeasurementresultappearsinthealpha-numericdisplay.

WARNING: Before performing measurements, verify that the device under test is not energized.

1. ConnecttheinstrumenttoanACpowersupply.

2. Beforeturningtheinstrumenton,connectthetestprobestothedevicetobetestedandtothefrontpanelterminals.

WARNING: Do not connect or disconnect the test leads during a measurement.


1. TurntheinstrumentONusingtheOn/Off switch.

2. UsetheRange selector switchtochoosethemeasurementrangeandtestcurrent.

3. Anintroductionmessageappearsmomentarilyandthentheinstrumentwillmakefunctionalchecks.

4. BesurethattheTest Currentcontrolknobisatthestartposi-tion(counter-clockwiseposition).OtherwisetheStartbuttonwillbeinhibitedandthedisplaywillshow the START WITH I=0 mes-sage.

makesureknobisinthestartposition:

orthedisplaywillshowthismessage:

5. ThePRESS START messagewillthenappearshowingthatameasurementcanbestarted.

6. PressthegreenStart button.TheLOW CURRENT messagewillappear.


7. TurntheTest Current controlknobclockwise,increasingthecurrentuntilthedesiredcurrentisreached.

8. Thelowesttestcurrentisnominally10%oftherange.Itisimportanttoconsiderthatmeasurementerrorsincreasewhiletestcurrentdecreases.

9. ThemeasurementresultscanbestoredintheinternalmemorybypressingtheblueSavebutton.

10. PresstheredStopbuttontocompletethemeasurement.

11. Finally,whenfinishedturntheinstrumentoffusingtheOn/Offswitch.


3.4 Internal MemoryTheModel6290canstoreupto200measuredvaluesininternalmemory.Duringameasurement,presstheSavebuttontostoreavalue.

Theinstruments’modelandserialnumber,testnumber,dateandtime,elapsedtesttime,testcurrentandmeasuredvaluewillbestored.


CHAPTER 4

MAINTENANCE

Use only factory specified replacement parts. AEMC® will not be heldresponsibleforanyaccident, incident,ormalfunctionfollowingarepairdoneotherthanbyitsservicecenterorbyanapprovedrepaircenter.

4.1 Warning• Toavoidelectricalshock,donotattempttoperformanyservicing

unlessyouarequalifiedtodoso.

• Donotperformanyservicewhilethemicro-ohmmeterisonanycircuit.

• Toavoidelectrical shockand/ordamage to the instrument,donotgetwaterorotherforeignagentsintotheelectronicmodule.

• Whenreplacingfuses,installonlyfuseswhicharedirectreplace-ments.

4.2 Cleaning

WARNING: Disconnect the instrument from any source of electricity.

• Ifthecaseneedscleaning,donotuseanyalcoholoroilbasedcleaners. Preferably use soapy water with a damp cloth orsponge.

• Dryimmediatelyaftercleaning.Avoidwaterpenetrationintotheelectronicmodule.

• Makesurethemicro-ohmmeterandallleadsaredrybeforefur-ther use.


4.3 Fuse Replacement

NOTE: Make sure that no terminals are connected and that the switch is in the OFF position before replacing the fuse.

Toreplacethefuse,proceedasfollows:

• SettheswitchtoOFF.

• Disconnectthemeasurementleadsfromtheinputterminals.

• Usingascrewdriver,unscrewthefusecoverfromthefaceplate.

• Removetheblownfuseusingascrewdriver.

• Insertanewfuse(5x20,12A),thenscrewthecoverbackontothefaceplate.


CHAPTER 5

SPECIFICATIONS

ELECTRICALTest Current Range 100A, 200A (True DC); Adjustable from 0 to 100%

Resistance Range0 to 1999µW (test current: up to 200A)

0 to 19.99mW (test current: up to 100A)

Accuracy ± 0.5% of Reading ± 2cts

Resolution0.1µW for R < 200µW

1µW for R < 2000µW10µW for R < 20mW

Output Voltage3.5VDC @ 200A; 4.5VDC @ 100A

5.8VDC (no load)

Max. Load Resistance 10mW @ 200A; 30mW @ 100A

Measurement Method Four-terminal, Kelvin-type

Operation TimeUp to 1 minute of continuous use at 200A before thermal

protection activates; Up to 15 minutes use at 100A before thermal protection activates

Thermal Protection Protects all sensitive components, preventing any damage due to overheating

Memory Stores up to 200 measurements

Interface USB

Communication Software Supplied

Power Supply 100 to 130VAC, 60Hz

MECHANICALDimensions 19.76 x 15.51 x 7.48" (502 x 394 x 190mm)

Weight Approx. 24.25 lbs (11kg)

ENVIRONMENTALOperating Temperature 23° to 122°F (-5° to 50°C)

Storage Temperature -13° to 149°F (-25° to 65°C)

Humidity 95% RH (non-condensing)

SAFETYSafety Rating IEC61010-1

Environmental Protection IP54 with closed lid

CE Mark Pending

*Specifications are subject to change without notice


Repair and CalibrationToensurethatyourinstrumentmeetsfactoryspecifications,werecommendthatitbescheduledbacktoourfactoryServiceCenteratone-yearintervalsforrecalibration,orasrequiredbyotherstandardsorinternalprocedures.

For instrument repair and calibration:

YoumustcontactourServiceCenterforaCustomerServiceAuthorizationNumber(CSA#).Thiswillensurethatwhenyourinstrumentarrives,itwillbetrackedandprocessedpromptly.PleasewritetheCSA#ontheoutsideoftheshippingcontainer. If the instrument is returnedforcalibration,weneedtoknowifyouwantastandardcalibration,oracalibrationtraceabletoN.I.S.T.(Includescalibrationcertificateplusrecordedcalibrationdata).

Ship To: ChauvinArnoux®,Inc.d.b.a.AEMC® Instruments15FaradayDriveDover,NH03820USA

Phone:(800)945-2362(Ext.360)(603) 749-6434(Ext.360)

Fax: (603)742-2346or(603)749-6309E-mail:[email protected]

(Orcontactyourauthorizeddistributor)

Costsforrepair,standardcalibration,andcalibrationtraceabletoN.I.S.T.areavailable.

NOTE: You must obtain a CSA# before returning any instrument.

Technical and Sales AssistanceIfyouareexperiencinganytechnicalproblems,orrequireanyassistancewiththeproperoperationorapplicationofyourinstrument,pleasecall,mail,faxore-mailourtechnicalsupportteam:

ChauvinArnoux®,Inc.d.b.a.AEMC® Instruments200FoxboroughBoulevardFoxborough,MA02035USA

Phone:(800)343-1391(508) 698-2115

Fax: (508)698-2118E-mail:[email protected]

NOTE: Do not ship Instruments to our Foxborough, MA address.


Limited WarrantyTheMicro-ohmmeterModel6290iswarrantedtotheownerforaperiodoftwo yearsfromthedateoforiginalpurchaseagainstdefectsinmanufacture.ThislimitedwarrantyisgivenbyAEMC®Instruments,notbythedistribu-torfrom whom it was purchased. This warranty is void if the unit has beentamperedwith,abusedorifthedefectisrelatedtoservicenotperformedbyAEMC® Instruments.

Full warranty coverage and product registration is available on our web-site at www.aemc.com/warranty.html.

Please print the online Warranty Coverage Information for your records.

What AEMC® Instruments will do:If a malfunction occurs within the warranty period, you may return theinstrument to us for repair, provided we have your warranty registra-tioninformation on file or a proof of purchase. AEMC® Instruments will,at itsoption,repairorreplacethefaultymaterial.

REGISTER ONLINE AT:

Warranty RepairsWhat you must do to return an Instrument for Warranty Repair:

First, request aCustomerServiceAuthorizationNumber (CSA#) byphoneorbyfaxfromourServiceDepartment(seeaddressbelow),thenreturntheinstrumentalongwiththesignedCSAForm.PleasewritetheCSA#ontheoutsideoftheshippingcontainer.Returntheinstrument,postageorshipmentpre-paidto:

Ship To: ChauvinArnoux®,Inc.d.b.a.AEMC® Instruments15FaradayDrive•Dover,NH03820USA

Phone:(800)945-2362(Ext.360)(603) 749-6434(Ext.360)

Fax: (603)742-2346or(603)749-6309E-mail:[email protected]

Caution:Toprotectyourselfagainstin-transitloss,werecommendyouinsureyour returned material.

NOTE: You must obtain a CSA# before returning any instrument.

Notes:

08/18

99-MAN100362v5

Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments15FaradayDrive•Dover,NH03820USA•Phone:(603)749-6434•Fax:(603)742-2346

www.aemc.com

6290 - aemc instruments€¦ · 6 micro-ohmmeter model 6290 chapter 2 product features 2.1...

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