AEMC 6240 User manual
MICRO-OHMMETER 6240
ENGLISH 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 #: 2129.80
Model #: 6240
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
www.aemc.com
Table of Contents
1. INTRODUCTION............................................................................... 3
1.1 International Electrical Symbols................................................4
1.2 DenitionofMeasurementCategories .....................................4
1.3 ReceivingYourShipment..........................................................4
1.4 OrderingInformation.................................................................5
1.4.1 AccessoriesandReplacementParts............................5
2. PRODUCT FEATURES ...................................................................... 6
2.1 Description................................................................................6
2.2 Applications ..............................................................................7
2.3 KeyFeatures ............................................................................7
2.4 ControlFeatures .......................................................................8
2.5 ButtonFunctions.......................................................................9
2.6 DisplaySymbols .....................................................................10
3. SPECIFICATIONS........................................................................... 11
3.1 Electrical .................................................................................11
3.2 Mechanical..............................................................................12
3.3 Environmental.........................................................................13
3.4 Safety......................................................................................13
4. OPERATION .................................................................................. 14
4.1 PrecautionsBeforeUse..........................................................14
4.2 InstrumentConguration(SET-UPmode) ..............................14
4.3 ResistanceMeasurements .....................................................15
4.3.1 MeasurementReadings..............................................16
4.3.2 ConnectionsandReadings.........................................16
4.3.3 Test Lead Connection .................................................17
4.4 RepetitiveMeasurements .......................................................17
4.5 MeasuringVeryLowResistance ............................................18
4.6 AutomaticRecording ..............................................................19
4.7 StoringResultsintoMemory...................................................20
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Micro-Ohmmeter Model 6240
4.8 RecallingResultsfromMemory..............................................21
4.9 ErasingMeasurementsfromMemory.....................................22
4.9.1 ErasingSelectedMeasurements................................22
4.9.2 ErasingAllMeasurements ..........................................22
5. DATAVIEW®SOFTWARE ................................................................ 23
5.1 Introduction .............................................................................23
5.2 InstallingDataView®................................................................23
5.3 ConnectingtheInstrumenttoyourComputer.........................27
5.4 OpeningtheMicro-ohmmeterControlPanel ..........................28
5.5 ConguringtheInstrument .....................................................29
5.6 DownloadingStoredTests ......................................................30
5.7 Saving/ExportingDatatoaSpreadsheetorPDFFile ............31
5.7.1 SavingDatatoaSpreadsheet....................................31
5.7.2 ExportingDatatoaPDFfromDataView®...................31
6. TROUBLESHOOTING ...................................................................... 32
6.1 ErrorMessages ......................................................................32
6.1.1 VoltagePresent ..........................................................32
6.1.2 Overrange...................................................................33
6.1.3 NoisyMeasurement....................................................33
6.1.4 Overheating ................................................................33
MAINTENANCE ................................................................................... 34
7.1 Warning...................................................................................34
7.2 Cleaning..................................................................................34
7.3 Charging/RechargingtheBattery ...........................................35
7.4 BatteryandFuseReplacement ..............................................36
RepairandCalibration...........................................................................37
TechnicalandSalesAssistance ............................................................37
Limited Warranty ...................................................................................38
WarrantyRepairs...................................................................................38
Micro-Ohmmeter Model 6240
3
CHAPTER 1
INTRODUCTION
WARNING
These safety warnings are provided to ensure the safety of
personnelandproperoperationoftheinstrument.
• Thisinstrumentisprotectedfromaccidentalvoltagesofnot
more than 50V with respect to earth in measurement Cat-
egoryIII.
• Donotattempttoperformanytestswiththisinstrumentuntil
youhavereadtheusermanual.
• Tests are to be carried out on de-energized circuits only!
Never connect the unit to a live circuit.
• Make sure that none of the input terminals are connected
andthattheswitchissettoOFFbeforepluggingintheAC
powertorechargethebatteryoftheinstrument.
• Makesuretheinternalbatteryisfullychargedpriortotesting.
If the instrument has been left unused for several months,
rechargethebattery.
• If the case needs cleaning, do not use any alcohol or oil
based cleaners. Preferably use soapy water with a damp
clothorsponge.Donotimmersethe6240micro-ohmmeter
inwater.
• Use connection accessories of which the overvoltage cat-
egory and the service voltage are greater than or equal to
those of the measuring instrument (50V Cat. III). Use only
accessoriesthatcomplywithsafetystandards(IEC61010-2-
031).
• The test leads and measuring wires must be in good
conditionandshouldbereplacedifthereisanyevidenceof
deterioration(insulationsplit,burnt,etc.).
• Troubleshooting and metrological verication procedures
mustonlybeperformedbyqualied,approvedpersonnel,or
thefactory.
4
Micro-Ohmmeter Model 6240
1.1 International Electrical Symbols
Signifies that the instrument is protected by double or reinforced insulation.
This symbol on the instrument indicates a WARNING and that the operator must refer
to the user manual for instructions before operating the instrument. In this manual,
the symbol preceding instructions indicates that if the instructions are not followed,
bodily injury, installation/sample and/or product damage may result.
Risk of electric shock. The voltage at the parts marked with this symbol may
be dangerous.
When disposed of, this product must be sorted for the recycling of electrical
and electronic equipment in accordance with WEEE directive 2002/96/EC.
1.2 Definition of Measurement Categories
Cat. I: Formeasurements on circuits notdirectlyconnectedto theAC
supply wall outlet such as protected secondaries, signal level,
andlimitedenergycircuits.
Cat. II: For measurements performed on circuits directly connected to
the electrical distribution system. Examples are measurements
onhouseholdappliancesorportabletools.
Cat. III: For measurements performed in the building installation at
the distribution level such as on hardwired equipment in xed
installationandcircuitbreakers.
Cat. IV: For measurements performed at the primary electrical supply
(<1000V) such as on primary overcurrent protection devices,
ripplecontrolunits,ormeters.
1.3 Receiving Your Shipment
Uponreceivingyourshipment,makesurethatthecontentsareconsistent
withthepackinglist.Notifyyourdistributorofanymissingitems.Iftheequip-
mentappearstobedamaged,leaclaimimmediatelywiththecarrierand
notifyyourdistributoratonce,givingadetaileddescriptionofanydamage.
Savethedamagedpackingcontainertosubstantiateyourclaim.
NOTE: Charge the instrument fully before use.
Micro-Ohmmeter Model 6240
5
1.4 Ordering Information
Micro-ohmmeter Model 6240............................................ Cat. #2129.80
Includes set of two 10ft Kelvin clips (10A - Hippo), NiMH rechargeable battery
pack, optical USB cable, US 115V power cord, one pad of measurement results
forms, DataView®software, extra large tool bag, two spare fuses (12.5A), product
warranty and registration card and a user manual.
1.4.1 Accessories and Replacement Parts
Kelvinclips(1A),10ft color-coded leads
withbananaplugterminations.............................................Cat. #1017.83
Kelvinclips(10A-Hippo),10ftcolor-codedleads
withspadelugterminations.................................................Cat. #1017.84
Kelvinclips(10A-Hippo),20ftcolor-codedleads
withspadelugterminations................................................. Cat. #2118.70
KelvinProbes(1A-SpringLoaded),10ftwith4mmbanana
plugtermination(includessetof5forkterminals)............... Cat. #2118.73
KelvinProbes(1A-SpringLoaded),20ftwith4mmbanana
plugtermination(includessetof5forkterminals)............... Cat. #2118.74
Thermo-HygrometerModelCA846 ..................................... Cat. #2121.24
OpticalUSBCable...............................................................Cat. #2135.41
ReplacementBattery6.5V,8.5AH....................................... Cat. #2129.91
Fuse,setof5,12.5A/500V,6.3x32mm ............................. Cat. #2129.92
ExtraLargeClassicToolBag ..............................................Cat. #2133.73
MeasurementResultForms,replacementsetoftwo.......... Cat. #2129.94
Order Accessories and Replacement Parts Directly Online
Check our Storefront at www.aemc.com/store for availability
6
Micro-Ohmmeter Model 6240
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The Micro-ohmmeter Model 6240 is used to perform low resistance
measurementsfrom1μΩto 400Ω.Therearesixrangeswithtestcurrents
from10mAto10A.
Thefrontendofthemicro-ohmmeteremploysafour-wireKelvincongu-
ration,whicheliminatestestleadresistanceforameasurementaccuracy
of0.25%.Abuilt-incircuitltersoutACsignals.
TheMicro-ohmmeterModel6240ispackagedinasealedeldcasewell
suitedforshopandelduse.Powerissuppliedbyalong-lifeNiMHbattery
packwithabuilt-inrecharger(110/220V).
Thelarge,easy-to-readliquidcrystaldisplayis2.25x4.00".Itdisplaysthe
valueofresistance,currentorvoltagetest,polarityandbatterycharge.
Foroperatorsafetyandinstrumentprotection,themicro-ohmmeterisfuse
protectedattheinputs.Onefuse,accessiblefromthefrontpanel,protects
againststoredenergyininductiveloads.
Enhanced internal circuitry protects against possible inductive kickback
whenthecurrentisshutoff.
Abuilt-inthermalswitchprotectsthemicro-ohmmeteragainstoverheating
onthe10Arangewhenincontinuoususe.
Micro-Ohmmeter Model 6240
7
2.2 Applications
Someofthemorepopularandmostfrequentusesofthemicro-ohmmeter
areinapplicationsfor:
Checkingmetalliccoatingresistance,especiallyinaeronautics•
Groundconnectionsandcontinuitymeasurement•
Resistancemeasurementsonmotorsandsmalltransformers•
Contactresistancemeasurementsonbreakersandswitches•
Componentmeasurement•
Electricalcableresistancemeasurement•
Mechanicalbondtests•
Wire to terminal connections•
Aircraftandrailbonds•
2.3 Key Features
Measuresfrom1µ• Ωto 400Ω
Testcurrentselectionfrom10mAto10A•
Manualtemperaturecompensation(withDataView• ®software)
Frontpanelpolarityreversefunction•
Storesupto99testresults•
Operatorsafetybyautomaticdischargeofresidualchargeonthe•
equipmentundertest
Instantaneous,continuousormultipletestoperation•
Autostoreofmultipletestresults•
Internal,rechargeablebatteriesconductupto850,10Atests•
Abuilt-inbatterypackrechargerrechargesthebatteriesby•
connectingtotheACline(110V-230V,50/60Hz)usingastandard
line cord
4-Wiremeasurementwithautomaticcompensationof•
undesirablevoltagesandleadresistance
Largemulti-functionbacklitdisplay•
Directdisplayofthemeasurementwithunits,rangeandtest•
current
Rugged,sealedcase•
8
Micro-Ohmmeter Model 6240
2.4 Control Features
°C°F
mV
mA
°
>
<
V
µmΩ
AVG
OBJ. TEST
MEMMRCLR
P
HOLD
COM
DC
AC
2nd
I
+I
_
1
7
8
6
4
235
Figure 2-1
1. Kelvininputterminals
2. AClinerechargingreceptacle
3. Outputfuse-12.5A,500V,6x32mm
4. Largemulti-linebacklitliquidcrystaldisplay(see§2.6)
5. Opticalinterfaceconnectorforconnectiontoacomputer
6. Rangeselectionswitch
7. Start/Stopbutton
8. Program/ functionbuttons(see§2.5)
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Table of contents
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