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MEGOHMMETER 5070
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 #: 2130.30
Model #: 5070
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
Chauvin Arnoux®, Inc.d.b.a AEMC® Instrumentswww.aemc.com
Megohmmeter Model 5070 1
Table of Contents
1. INTRODUCTION ................................................................................. 41.1 International Electrical Symbols ...........................................................5
1.2 DefinitionofMeasurementCategories .................................................5
1.3 ReceivingYourShipment .....................................................................5
1.4 OrderingInformation ............................................................................61.4.1 AccessoriesandReplacementParts ......................................6
1.5 AccessoryInformation..........................................................................61.5.1 DataView®Software ................................................................6
2. PRODUCT FEATURES ......................................................................... 72.1 ControlFeatures ..................................................................................8
2.2 DisplayFeatures ................................................................................10
3. SPECIFICATIONS ............................................................................. 113.1 ReferenceConditions.........................................................................11
3.2 Voltage ...............................................................................................11
3.3 InsulationResistance .........................................................................11
3.4 PowerSupply .....................................................................................16
3.5 EnvironmentalSpecifications .............................................................17
3.6 MechanicalSpecifications ..................................................................17
3.7 SafetySpecifications ..........................................................................17
3.8 VariationsinOperatingRange ...........................................................18
4. SPECIAL FUNCTIONS ....................................................................... 194.1 SET-UPFunction ...............................................................................19
4.1.1 DefaultConfigurations ..........................................................194.1.2 InstrumentConfigurationParameters ...................................204.1.3 SET-UPMenu .......................................................................27
4.2 MODE/PRINTButton .......................................................................284.2.1 PrimaryFunction-MODE .....................................................284.2.2 SecondaryFunction-PRINT ................................................32
2 Megohmmeter Model 5070
4.3 DISPLAY/GRAPHButton .................................................................334.3.1 PrimaryFunction-DISPLAY .................................................334.3.2 SecondaryFunction-GRAPH ..............................................46
4.4 Left/TEMPButton .............................................................................464.4.1 PrimaryFunction-Left .........................................................464.4.2 SecondaryFunction-TEMP .................................................46
4.5 Down/SMOOTHButton ....................................................................484.5.1 PrimaryFunction-Down ......................................................484.5.2 SecondaryFunction-SMOOTH ...........................................48
4.6 Up/ALARMButton ............................................................................494.6.1 PrimaryFunction-Up ...........................................................494.6.2 SecondaryFunction-ALARM...............................................49
4.7 Right/BacklightButton ......................................................................494.7.1 PrimaryFunction-Right .......................................................494.7.2 SecondaryFunction-Backlight ............................................49
4.8 MEM/MRButton ...................................................................504.8.1 PrimaryFunction-MEM(Save) ............................................504.8.2 SecondFunction-MR(Recall) .............................................51
4.9 ClearingtheMemory ..........................................................................52
4.10 CalculationofΔTfromStoredData ....................................................53
4.11 MaximumOutputVoltage ...................................................................54
4.12 ListofErrorCodes .............................................................................54
5. MEASUREMENT FUNCTIONS ........................................................... 555.1 AC/DCVoltage ...................................................................................55
5.2 InsulationMeasurement .....................................................................55
5.3 CapacitanceMeasurement ................................................................58
5.4 ResidualCurrentMeasurement .........................................................58
6. OPERATION ..................................................................................... 596.1 PerformingMeasurements .................................................................59
6.2 StepFunctionMode ...........................................................................60
6.3 OperationExamples...........................................................................62
Megohmmeter Model 5070 3
6.4 PrintingMeasuredValues(MODE/PRINTButton) ....................64
6.5 InstantaneousPrintingofMeasurements(PrintResult) ................64
6.6 PrintingDatainMemory(PrintMemory) ....................................67
7. DATAVIEW® SOFTWARE ................................................................... 717.1 InstallingDataView® ...........................................................................71
7.2 MegohmmeterControlPanel .............................................................73
8. MAINTENANCE ................................................................................ 748.1 RechargingtheBattery ......................................................................74
8.2 FuseReplacement .............................................................................75
8.3 Cleaning .............................................................................................75
8.4 Storage...............................................................................................75
APPENDIX A: UTILIZING THE GUARD TERMINAL .................................. 76
APPENDIX B: SERIAL CABLE REQUIREMENTS ..................................... 78
APPENDIX C: V DISTURBANCE/V OUTPUT FEATURE ............................ 79RepairandCalibration.................................................................................80
TechnicalandSalesAssistance ..................................................................80
LimitedWarranty .........................................................................................81
WarrantyRepairs ........................................................................................81
4 Megohmmeter Model 5070
CHAPTER 1
INTRODUCTION
WARNING
Thesesafetywarningsareprovidedtoensurethesafetyofpersonnelandproperoperationoftheinstrument.
• Donotattempttoperformanytestswiththeseinstrumentsuntilyouhavereadtheinstructionmanual.
• Safetyistheresponsibilityoftheoperator!
• Tests are to be carried out only on non-energized circuits!Checkforlivecircuitsbeforemakingresistancemeasurements(SafetyCheck).
• High voltage is present, as is the sample connected to it.Anyoneperformingorassistingintestingmustfollowallsafetyprecautions topreventelectrical shock to themselvesand toothers.
• Usepersonalprotectiveequipmentwhereappropriate.
• Whentestingsampleswithacapacitivecomponent,makesurethey have been properly discharged and are safe to touch.Dielectric insulation samples should be short-circuited for atleastfivetimestheamountoftimetheywereenergized.
• Megohmmetersshouldneverbeusedinanexplosiveenviron-ment.
• Onlyusetheleadsthataresuppliedwiththemegohmmeter.Iftheyaredefectiveorworn,replacebeforetesting.
• This instrumentcanbeusedon installationsratedfor1000VCATIIIor2500VCATI.
Megohmmeter Model 5070 5
1.1 International Electrical Symbols
This symbol 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 product damage may result.Risk of electric shock. The voltage at the parts marked with this symbol may be dangerous.
In conformity with WEEE 2002/96/EC
1.2 Definition of Measurement CategoriesCAT IV: Formeasurementsperformedattheprimaryelectricalsupply(<1000V)
suchasonprimaryovercurrentprotectiondevices,ripplecontrolunits,or meters.
CAT III: Formeasurementsperformedinthebuildinginstallationatthedistributionlevel such as on hardwired equipment in fixed installation and circuitbreakers.
CAT II: For measurements performed on circuits directly connected to theelectricaldistributionsystem.Examplesaremeasurementsonhouseholdappliancesorportabletools.
1.3 Receiving Your Shipment• Matchthecontentswiththeorderinginformation.• Notifyyourdistributorofanymissingitems.• If the equipment appears to be damaged, file a claim immediately with the
carrierandnotifyyourdistributoratonce.
NOTE: Charge the instrument fully before use.
6 Megohmmeter Model 5070
1.4 Ordering InformationMegohmmeter Model 5070.............................................................Cat. #2130.30Includes extra large tool bag, set of three 10 ft (5kV) leads (red/black/blue) with integral hippo clips (5000V), one guard terminal jumper lead, RS-232 DB9 F/F 6 ft null modem cable, RS-232 to USB adapter, US 115V power cord, rechargeable battery pack, and a USB stick with DataView® software and user manual.
1.4.1 Accessories and Replacement Parts
Cable,PCRS-232,DB9F/F6ftNullModemCable ........................ Cat. #2119.45
Setof3,color-coded10ftsafetyleads(5000V),3color-coded alligatorclips(600VCATIV) ............................................................. Cat. #2119.76
Lead–Replacement1ftjumperlead............................................... Cat. #2119.78
Fuse,setof3,0.1A,380V,5x20,.10kA ......................................... Cat. #2119.84
ReplacementLead–Setof3,Color-coded10ft(5kV)Safetywith IntegralHippoClips(JUMPER LEAD INCLUDED) .................................... Cat. #2119.85
Lead–Setof3,Color-coded25ft(5kV)Safetywith IntegralHippoClips(JUMPER LEAD NOT INCLUDED) ............................. Cat. #2119.86
Lead–Setof3,Color-coded45ft(5kV)Safetywith IntegralHippoClips(JUMPER LEAD NOT INCLUDED) ............................. Cat. #2119.87
ExtraLargeClassicToolBag ...........................................................Cat. #2133.73
Inverter–12VDC to 120VAC200WattforVehicleuse ......................Cat. #2135.43
Battery–Rechargeable9.6V ...........................................................Cat. #2960.21
US115VPowerCord .......................................................................Cat. #5000.14
Adapter–RS-232toUSB2.0 ..........................................................Cat. #5000.60
1.5 Accessory Information
1.5.1 DataView® SoftwareDataView®softwaremakesitpossibleto:
• Retrievedatafrommemoryandplotgraphsofthechangesininsulationasafunctionofthetimeoverwhichthetestvoltageisapplied,R(t).
• Printoutprotocolsofpersonalizedtests,dependingontheuser’sneeds.• Createtextfilesforuseonspreadsheets.• SetupandcontroltheinstrumententirelybytheRS-232.
Megohmmeter Model 5070 7
CHAPTER 2
PRODUCT FEATURES
TheModel5070megohmmeterisatop-of-the-linemeasuringinstrument,portable,inaruggedhousingwithagraphicdisplay.Itiscapableofoperatingfrominternalbatteryorlinepower.
Main Functions:• Automatic detection and measurement of voltage/frequency/input cur-
rent• Quantitativeandqualitativeinsulationmeasurement
− Measurement at 500/1000/2500/5000VDC or other test voltagebetween 40 and 5100VDC(adjustablevoltage)
− Measurementinvoltagestepmode(theappliedvoltageincreasesinsteps)
− AutomaticcalculationofDAR/PIandDD(dielectricdischargeindex)qualityratios
− Automaticcalculationofmeasurementresultreferredtoareferencetemperature
• Automaticcapacitancemeasurement• Automaticmeasurementofresidualcurrent
Thismegohmmeterhelpsensurethesafetyofelectrical installationsandequip-ment. Theoperation iscontrolledbyamicroprocessor fordataacquisition,pro-cessing,anddisplayofmeasurementsandthestorageandprintingofresults.
Advantages:
• Digitalfilteringofinsulationmeasurements• Automaticvoltagemeasurement• Automatic detection of external AC or DC voltages on the terminals,
beforeorduringinsulationmeasurements,disablingorstoppingthemea-surementswhenmeasurementaccuracyisnolongerguaranteed
• Thresholdprogrammingtotriggeraudiblealarms• Timerformeasurementtimechecks• Fuseprotectionoftheinstrumentwithdetectionanddisplayofdefective
fuses• Operatorsafetybyautomaticdischargeofresidualhighvoltageonthe
equipmenttested
8 Megohmmeter Model 5070
• Automaticshutdownoftheinstrumenttosavebatterypower• Batterychargeindication• Largebacklitgraphicdisplaythatisveryeasytoread• Memory(128KB),realtimeclock,andserialinterface• ControlandprogrammingoftheinstrumentfromaPC (usingDataView®software)• Directprintingwithaserialprinter(optionalaccessory-Cat.#2140.21)
2.1 Control Features
1
7
2
8
6
43 5
1. Safetyterminals:“+”,“G”and“-”
2. Protectivefuseaccess
3. ACpowerplug(directoperationonACandbatteryrecharge)
4. Back-litliquidcrystaldisplay
5. RS-232serialinterfacemaleplug(9-pin)• ForconnectiontoaPCorprinter
6. Rotaryselectorswitchwith8positions:• OFF-Instrumentisoff
Megohmmeter Model 5070 9
• MΩ - 500V-Insulationmeasurement(to2TΩ)• MΩ - 1000V-Insulationmeasurement(to4TΩ)• MΩ - 2500V-Insulationmeasurement(to10TΩ)• MΩ - 5000V-Insulationmeasurement(to10TΩ)• MΩ 50V - 5000V-Insulationmeasurementwithselectabletestvoltage
(from40V to 5100V: 10V steps from40V to 1000Vand100V steps1000Vto5000V)
• Step Voltage -Insulationmeasurementwithvoltagestepfunction(upto5stepscanbeconfigured)
• SET-UP-Userprogrammingofthemegohmmeterconfiguration
7. START/STOPbutton(startsandstopsmeasurements)
8. Eightbuttons,eachwithaprimaryandsecondary function.Thesecondaryfunctionsarehighlightedinyellowitalicsbeloweachbutton:
• 2nd (yellow button)-Selectsthesecondfunctiononeachbutton.
• -Selectsafunctionorincrementstheparameteronwhichthecursorispositioned.Pressingandholdingthekeyincreasestherateofchangeoftheparameter.
ALARM - ActivatesordeactivatesthealarmsprogrammedinSET-UP.
• -Selectsafunctionordecrementstheparameteronwhichthecursorispositioned.Pressingandholdingthekeyincreasestherateofchangeoftheparameter.
SMOOTH-Stops/startssmoothingofdisplayedvaluesduringtesting.
• -Selectsaparametertobemodifiedtotheleft. TEMP - activates temperature correction of themeasurement to the
referencetemperatureprogrammedinSET-UP.
• -Selectsaparametertobemodifiedtotheright.
-TurnsthedisplaybacklightONorOFF.
• MEM-Savesmeasuredvalues. MR - Recalls saved data.
• MODE-Beforestartingatest,themodefunctionallowsselectionofruntime,samplerate,DARPIandratiotimes.
PRINT-directprintingoftestresult(s)onaserialorparallelprinter.
• DISPLAY - Browses through the various screens accessible before,duringandafterthemeasurement.
• GRAPH-Aftera“timedrun”,theGraphmodedisplaysinsulationresis-tanceversustimeinagraphformat.
10 Megohmmeter Model 5070
2.2 Display Features
REMOTE IndicatesthattheinstrumentiscontrolledremotelyviatheRS-232interface.Inthismode,allofthekeysandtherotaryswitchareinac-tive,exceptfortheOFFposition.
COM Flasheswhendataistransmittedtotheserialinterface.Oncontinu-ouslyifthereisaproblemintransmission.
2nd Indicatesthatthesecondaryfunctionofakeywillbeused.
Indicatesthatthe“programmedtimetest”modewasselectedbeforethemeasurementwasstarted.
DAR Indicatesthatthe“automaticcalculationofDielectricAbsorptionRatio”modewasselectedbeforethemeasurementwasstarted.
PI Indicatesthatthe“automaticcalculationofPolarizationIndex”modewasselectedbeforethemeasurementwasstarted.
DD Indicatesthatthe“automaticcalculationof“DielectricDischargeIndex”modewasselectedbeforethemeasurementwasstarted.
SMOOTH Smoothstheinsulationmeasurementreadingsonthedisplayforbetter visibility.
ALARM Indicatesthatthealarmisactivated.AnaudiblealarmwillsoundifthevaluemeasuredisabovethelimitdefinedintheSET-UPmode.
Indicatesthebatterychargecondition.
Voltagegenerateddangerous,V>120VDC.
Externalvoltagepresent-thissymbolisactivatedwhentheStartbuttonispressedifV>25VRMS.
Megohmmeter Model 5070 11
CHAPTER 3
SPECIFICATIONS
3.1 Reference ConditionsInfluence Quantity Reference Values
Temperature 23°C ±3°K
Relative Humidity 45 to 55%
Supply Voltage 9 to 12V
Frequency Range DC and 15.3 to 65Hz
Capacitance in parallel with the input resistance 0µF
Electric Field nil
Magnetic Field <40A/m
3.2 VoltageMeasurement Range 1.0 to 99.9V 100 to 999V 1000 to 2500V 2502 to 4000V
Frequency Range* DC and 15Hz to 500Hz DC Only
Resolution 0.1V 1V 2V 2V
Accuracy 1% of Reading ± 5cts 1% of Reading ± 3ct
Input Impedance 750kΩ at 3MΩ depending on measure voltage
*Over 500Hz, the small display indicates “- - - -” and the main display gives only an assess-ment of the peak value of the measured voltage.
Measurement Category:1000VCATIIIor2500VCATI(transients≤2.5kV)
3.3 Insulation ResistanceMethod: Voltage-currentmethodaccordingtoEN61557-2(ed.02/97)
Nominal Output Voltage: 500,1000,2500,5000VDC (orselectablefrom40Vto5100V)
Adjustments Available in Variable Mode: 10Vfrom40Vto1000V 100Vfrom1000Vto5100V
Open-circuit Voltage: ≤1.1xVn±2V(Vn±2%invariablemode)
Max. Overload of Voltage Vn: (1.05+dISt)Vn+50V withdlSt=3%,10%or20%
NOTE: Vn = Test Voltage
12 Megohmmeter Model 5070
Nominal Current:>1mADC
Short-circuit Current: <1.6mA±5%
Load Current: 3mADCapproxwhenstartingmeasurement
Maximum Acceptable AC Voltage:Vpeak-(1.05+dISt)VnwithdlSt=3%,10%or20%
NOTE: dlStistheratioofVDisturbance/VOutputandisselectablein SET-UPmode
Measurement Ranges:500V:30kΩ to 1.999TΩ 2500V:100kΩ to 9.99TΩ1000V:100kΩ to 3.999TΩ 5000V:300kΩ to 9.99TΩ
Variable: 40Vto5100V(seegraphbelow)
12Rmax (TΩ)
Variable Voltage (V)
Resistance Range in Voltage Mode
1086420
0 1000 2000 3000 4000 5000
300Rmin (kΩ)
250200150100500
Resolution and Accuracy Chart (seecurves-pages14and15)
TestVoltage
500V500V - 1000V
2500V500V - 1000V - 2500V - 5000V
Range30 to99kΩ
100 to299kΩ
300 to999kΩ
1MΩ to3.999MΩ
4.00 to 39.99MΩ
40.0 to 399.9MΩ
Resolution 1kΩ 10kΩ 100kΩAccuracy ±5% of Reading + 3cts
TestVoltage
500V - 1000V - 2500V - 5000V1000V - 2500V
5000V2500V5000V
Range400MΩ to 3.999GΩ
4.00 to 39.99GΩ
40.0 to 399.9GΩ
400GΩ to 1.999TΩ 2.000 to 3.999TΩ 4.00 to
10.00TΩResolution 1MΩ 10MΩ 100MΩ 1GΩ 10GΩAccuracy ±5% of Reading + 3cts ±15% of Reading + 10cts
Megohmmeter Model 5070 13
DC Voltage Measurement (duringinsulationtest):
Range Resolution Accuracy
40.0 to 99.9V 0.1V
1% of Reading ± 1ct100 to 1500V 1V
1501 to 5100V 2V
DC Voltage Measurement (afterinsulationtest):
Range Resolution Accuracy
25 to 5100V 0.2% Vn 5% of Reading ± 3cts
Typical build-up time for the measurement according to components tested (Vdist = 0.03Vn).Thesevaluesincludetheinfluencescausedbythechargeofthecapacitivecom-ponent,bytheautomaticrangesystemandtothetestvoltagecontrol.
Test Voltage LoadNon Capacitive (unsmoothed
measurement)
With capacitance of 1µF (smoothed
measurement)
500V1MΩ 3s 4s
100GΩ 8s 40s
1000V1MΩ 3s 4s
100GΩ 8s 80s
2500V3MΩ 3s 4s
100GΩ 8s 90s
5000V5MΩ 4s 16s
100GΩ 8s 120s
Typical discharge time for a capacitive component to reach 25VDC.
Initial Voltage 500V 1000V 2500V 5000V
Discharge time (C in µF) C x 3s C x 4s C x 4s C x 7s
14 Megohmmeter Model 5070
Typical changes in test voltages as a function of the load:
0
100
200
300
400
500
600
Outp
ut voltage (
V)
0.01 0.1 1
Resistance (MΩ)
500V Range
0
200
400
600
800
1000
1200
Outp
ut voltage (
V)
0.01 1
Resistance (MΩ)
1000V Range
Megohmmeter Model 5070 15
0
500
1000
1500
2000
2500
3000
Outp
ut voltage (
V)
0.1 101
Resistance (MΩ)
2500V Range
0
1000
2000
3000
4000
5000
6000
Outp
ut voltage (
V)
0.1 101
Resistance (MΩ)
5000V Range
16 Megohmmeter Model 5070
Capacity Measurement (afterdischargeoftestedcomponent):
Range Resolution Accuracy
0.005 to 9.999µF 1nF10% of Reading ± 1ct
10.00 to 49.99µF 10nF
Leakage Current Measurement
Range Resolution Accuracy
0.000 to 0.250nA1pA
15% of Reading ± 10cts
0.251 to 9.999nA 10% of Reading
10.00 to 99.99nA 10pA
5% of Reading
100.0 to 999.9nA 100pA
1.000 to 9.999µA 1nA
10.00 to 99.99µA 10nA
100.0 to 999.9µA 100nA
1000 to 3000µA 1µA 10% of Reading Calculation of Terms DAR and PI
Range Resolution Accuracy
0.02 to 50.00 0.01 5% of Reading ± 1ct
Calculation of Term DD
Range Resolution Accuracy
0.02 to 50.00 0.01 10% of Reading ± 1ct
3.4 Power Supply• RechargeablebatteryNiMh(8x1.2V/3.5Ah)• Recharge:85to256V/50-60Hz
Minimum Battery Charge Life(perNFEN61557-2)
Test Voltage Nominal ChargeNumber of Measurements 5s on nominal charge
(with 25s pause between each measurement)
500V 500kΩ 6500
1000V 1MΩ 5500
2500V 2.5MΩ 4000
5000V 5MΩ 1500
Average Battery Life:Theoperatingtimewillbe15daysor3weeks,basedupona10minutelongPImeasurement.Recharge Time:6hoursfor100%capacity(10hoursifthebatteryiscompletelydrained)0.5hoursfor10%capacity(chargelife:2daysapproximately)
Megohmmeter Model 5070 17
NOTE: It is possible to recharge the batteries while performing insulation measurements provided that the values measured are higher than 20MΩ. In this case, the recharging time is higher than 6 hours and depends on the frequency of the measurements.
3.5 Environmental SpecificationsOperating Range: 14°to104°F(-10°to40°C)duringrechargingofbatteries 14°to131°F(-10°to55°C)duringmeasurement10to80%RHStorage:-40°to158°F(-40°to70°C);10to90%RH Altitude:<2000m
3.6 Mechanical SpecificationsCase Dimensions (LxWxH):10.63x9.84x7.09"(270x250x180mm)Weight:9.5lbs(4.3kg)approx
3.7 Safety SpecificationsElectricalsafetyaccordingtoEN61010, EN61557
Doubleinsulation:1000V CATIII2500V CATIPollutionDegree2
Electromagnetic Compatibility:NFEN61326-1(Ed.97)+A1,industrialenvironmentcategory
Mechanical Protection:IP53perNFEN60529(Ed.92)IK04perNFEN50102(Ed.95)
18 Megohmmeter Model 5070
3.8 Variations in Operating Range
InfluentialQuantity
Range ofInfluence
QuantityInfluenced*
Influence
Typical Max
BatteryVoltage
9V to 12VV
MΩ<1ct<1ct
2cts3cts
Temperature -10° to +55°CV
MΩ0.15% R/10°C
0.20% R0.3% R ± 1ct1% R ± 1ct
Humidity 10 to 80% RHV
MΩ (10kΩ to 40GΩ)MΩ (40GΩ to 10TΩ)
0.2% R0.2% R3% R
1% R ± 2cts 1% R ± 5cts15% R ± 5cts
Frequency 15 to 500Hz V 0.3% R 0.5% R ± 1ct
AC voltagesuperimposed on
test voltage0% to 20% Vn MΩ 0.1% R / % Vn 0.1% R / % Vn ± 5cts
*The terms DAR, PI, DD and the capacity and current leak measurements are included in the quantity “MΩ”.
Megohmmeter Model 5070 19
CHAPTER 4
SPECIAL FUNCTIONS
4.1 SET-UP FunctionThisfunction,locatedatthetoprotaryswitchposition(Blue“SET-UP”position),isusedtochangetheconfigurationoftheinstrument.
4.1.1 Default ConfigurationsThedefaultconfigurationsareasfollows:
SET-UPInstr.Nr. 9600004 SW Version 1.2
Display contrastAlarm SettingsAdjustable Voltage 1Adjustable Voltage 2Adjustable Voltage 3Timed Run (h:m)Sample Time (m:s)DAR (s/s)PI (m/m)Set Step Function 1Set Step Function 2Set Step Function 3Temperature UnitDefault probe temperatureRc reference temperature∆T for R/2Calculate ∆T from MemoryMaximum Output VoltageSet Default ParameterClear MemoryV Disturbance / V OutputBuzzerPower DownBaud RateUnitsDate (d.m.y)Time (h:m)
80
50V100V250V0:100:10
30/601.0/10
Celsius23°C40°C10°C
5100V
3%onoff
9600 / RS232Europe
04.02.200415:47
20 Megohmmeter Model 5070
4.1.2 Instrument Configuration Parameters
DISPLAY CONTRASTThis functionallowsyoutochangethe lightnessanddarknessof thedisplaytobestsuittheenvironment.
Range
0 to 255*
*The display is no longer legible above 130
Toadjustthecontrast,pressthebuttontomovetheblinkingcursortothedis-playcontrastvalue.Thedefaultvalueis80.Usetheandbuttonstolightenordarkenthedisplay.Thehigherthenumberthelighterthedisplaywillbe.Whenfinishedpressthebuttontomovethecursorbacktotheparameterselectionposition.
ALARM SETTINGSThisfunctionallowsyoutoselectalowinsulationresistancevaluethatwillcauseanalarmsymboltoappearonthedisplayandwillcausethebuzzertoemitacon-tinuoustonewhenthemeasuredinsulationresistancefallsbelowthisvalue.
Voltage Range
500V 30kΩ to 2TΩ1000V 100kΩ to 4TΩ2500V
300kΩto 10TΩ5000V
Adj. Voltage 1
10kΩ to 10TΩAdj. Voltage 2
Adj. Voltage 3
To adjust the alarm settings, press the button until the blinking cursor is tothe left of alarm settings.To adjust the alarm value press thebutton. Fromthescreendisplayed,youcanadjustlowlimitresistancevaluesfor500V,1000V,2500V,5000Vorthethreeadjustablevoltagepositions.
Tochangethelowlimitforanyofthesevoltagepositions,usetheandbut-tonstoselectthevoltage,thenpressthebuttontohighlighttheresistancevalueforthatvoltage.Next,usetheandbuttonstoincreaseordecreasethevalueattheblinkingcursorposition.
Oncethedesiredresistancevaluehasbeenprogrammed,pressthebuttontomovethecursoragaintothevoltageselectionpartofthescreen.Youmaynowselectthedifferentvoltageandadjustitsvalueasjustdescribed.
Toexitthealarmsettingfunction,presstheDISPLAYbutton.ThiswillbringyoubacktothetopoftheSET-UPmenu.
Megohmmeter Model 5070 21
ADJUSTABLE VOLTAGE 1, 2, 3ThisfunctiondefinesaspecificvoltagethatwillbeusedforInsulationResistanceMeasurementwhentherotaryswitchisintheadjustablevoltageposition.Thevaluesforthissettingcanbeanywherefrom40to5100Voltsadjustablein10or 100 Volt increments.
Voltage RangeAdj. Voltage 1 40 to 5100V
(in steps of 10V from 40 to 1000V)(in steps of 100V from 1000 to 5100V)
Adj. Voltage 2Adj. Voltage 3
Therearethreeadjustablesettingspossible.
TochangethevalueforAdjustableVoltage1,2or3,usethebutton.ToselecttheAdjustableVoltageparametertoprogram,pressthebuttontohighlightthevoltagetobeusedforthatselection,thenusetheandbuttonstoincrementordecrementthevalue.
Whenthedesiredvoltage isonscreen,press thebutton tomovethecursorbacktotheparameterselectionposition.
TIMED RUN (h : m)Thisfunctionletsyousetatimefrom1minuteto49hoursand59minutestorunaninsulationresistancetest.TheModel5070willautomaticallyendthetestattheendofthetimedrun.
Range00 to 49 : 01 to 59
Tochangethelengthoftimethatatestwillrun,pressthebuttontomovetheblinkingcursortothehourinTIMED-RUN.Usetheandbuttonstoincrementordecrementthehours.Next,pressthetoselecttheminutevalue.Usetheandbuttonstoincrementordecrementtheminutes.
When finished, press the button tomove the cursor back to the parameterselectionposition.
22 Megohmmeter Model 5070
SAMPLE TIME (m : s)Data froma timed run testcanbestored in theModel5070atan interval youselect.Thisstorageintervalcanbeasfastasonceevery5secondstoasslowasonceevery10minutes.
Range00 to 59 : 05 to 59
DAR (s : s)TheDielectricAbsorptionRatioisaratioofinsulationresistancemeasuredattwopredetermined times.The readingat thefirst timemark is thendivided into thereadingatthesecondtimemarktocalculatetheratio.Thetypicaltimesusedforthistestare30secondsand60seconds.Thesearethefactorydefaultsettings.Youcanadjustthetimeshereinthesetupmodefrom10to90secondsforthefirstreadingandfrom15to180secondsforthesecondreading,bothin5secondincrements.
NOTE: The Model 5070 will not allow the time for the second reading to be set lower that the set time for the first reading.
Range10 to 90 : 15 to 180
PI (m : m)ThePolarization Index isa ratioof insulationresistancemeasuredat tworede-terminedtimes.Thereadingatthefirsttimemarkisthendividedintothereadingatthesecondtimemarktocalculatetheratio.Thetypicaltimesusedforthistestare1minuteand10minutes.Thesearethefactorydefaultsettings.Theinsula-tionmaterialsusedtodayrequirelesstimetodeterminethisratio.Therefore,youcanadjustthetimeshereinthesetupmodetosuityourneedsfrom0.5minutesto30minutesforthefirstreadingandfrom1minuteto90minutesforthesecondreading.
NOTE: The Model 5070 will not allow the time for the second reading to be set lower that the set time for the first reading.
Range0.5 to 30 : 1 to 90
Megohmmeter Model 5070 23
SET STEP FUNCTION 1, 2, 3Stepvoltagetestingcanbeavaluabletoolindeterminingdefectiveinsulationorusedtodryoutcablesthathavebeenpenetratedbymoisture.Withthisfunction,youcanprogramthreedifferentprofileseachcontainingupto5voltagestepsanddwelltimesfrom1minuteto9hoursand59minutesperstep.
StepFunction
Default Value Range
Voltage Duration (h:m) Voltage Duration (h:m)
Step Function 1Step 1Step 2Step 3Step 4Step 5
50V100V150V200V250V
sample time
h : m00:0100:0100:0100:0100:01
00:01 (m:s)
40 to 5100V(in 10V, then 100V steps)
h : m00 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 59
00 to 59 : 00 to 59*
Step Function 2Step 1Step 2Step 3Step 4Step 5
100V300V500V700V900V
sample time
h : m00:0100:0100:0100:0100:01
00:01 (m:s)
40 to 5100V(in 10V, then 100V steps)
h : m00 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 59
00 to 59 : 00 to 59*
Step Function 3Step 1Step 2Step 3Step 4Step 5
1000V2000V3000V4000V5000V
sample time
h : m00:0100:0100:0100:0100:01
00:01 (m:s)
40 to 5100V(in 10V, then 100V steps)
h : m00 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 5900 to 09 : 01 to 59
00 to 59 : 00 to 59*
*The minimum sample time is related to the total duration of the test (Total Run Time). It is equal to : Sample Time (seconds) = (h+1)*5 where h= total run time in hours.
TEMPERATURE UNITThisfunctiontogglesthedisplaybetweenFahrenheitandCelsiusscalesfortem-peraturedisplay.
Range°C or °F
24 Megohmmeter Model 5070
DEFAULT PROBE TEMPERATUREWith this function, you can programa default value for the temperature of thedeviceundertest.Thiswillbeusedwhentemperaturecorrectionisappliedifnovalueisprogrammedrightafterthetestisconducted.
Range-15°C to +75°C
Rc REFERENCE TEMPERATUREReferencetemperaturetowhichthemeasurementresultmustbereferred.
Range-15°C to +75°C
ΔT for R/2Insulationresistancechangeswithtemperature.Thetypicalruleofthumbisthatforevery10°Cincreaseintemperaturetheleakagecurrentdoublesandtheresis-tancehalves.Somematerialshaveadifferent rateofchange.This feature letsyouprogramthetemperaturechange(ΔT)atwhichtheresistancehalvesfortheequipmentyouwillbetesting.Thisvaluewillbeusedwhencorrectingresultstoareferencetemperature.
Range-15°C to +75°C
CALCULATE ΔT FROM MEMORYTheModel5070hastheabilitytocalculateΔTfromthreepreviouslystoredtestsre-sultsatdifferenttemperaturesfromonematerialintheeventthatnoΔT is selected forthepresenttest.
MAXIMUM OUTPUT VOLTAGETheModel5070providestheabilitytolimitthemaximumtestvoltagetoavalueyouspecifyfrom40to5100volts.Whenprogrammed,theinstrumentwillnotgen-erateahighervoltagetoconductthetesteveniftheswitchpositionindicatesahighervoltage.Forexample,ifyousetthemaximumvoltageto1250voltsandyouplacetherotaryswitchinthe5000voltpositionandstartatest,theModel5070willonlyoutput1250volts.
Range40 to 5100V
Megohmmeter Model 5070 25
SET DEFAULT PARAMETERThisfunctionallowsyoutoresetalltheuserprogrammablefunctionsbacktothefactorydefaults.
CLEAR MEMORYTheclearmemoryfunctionallowsyoutoselectivelyerase individual testsoralltests from the internalmemoryof the instrument.Awarningwill appear first toensurethatyoudon’tdothisbyaccident.
V DISTURBANCE / V OUTPUT (see Appendix C)Thisratiodefinesthemaximumallowabledisturbancevoltagedependingontheselectedmeasurementvoltage.IftheVDisturbanceexceedsthevalueoftheratio,theinstrumentstopsthetestinprocess.Ifthevoltageexceedingtheratioispres-entatthedeviceundertestbeforethetestisstarted,atestwillnotbeallowedtostart.Threeprogrammablevaluesare:3%,10%and20%of themeasurementvoltage.Thedefaultis3%.
Example: If a test is to be performed at 1000V and the V Disturbance / V Output is set at 10%, the presence of 100 volts (1000V * 10% = 100) before the test starts will inhibit the test.
Range3%, 10% or 20%
BUZZERTheModel5070isequippedwithabuzzerthatwillemitanaudibletonewhenakeyispressed,atregularintervalsduringatimedtest,orwillbeoncontinuouslyduringanalarmtrip.Thisfunctionletsyoutogglethebuzzeronoroff.
RangeON or OFF
POWER DOWNTheModel5070hasapowersavefeaturewhichturnstheunit’sdisplayoffafter5minutesofnoactivity,ifatimedtestisnotinprogress.Thisfunctionletsyoutogglethisfeatureonoroff.
RangeON or OFF
26 Megohmmeter Model 5070
BAUD RATEThis function letsyouprogram in thecommunicationspeedbetween theModel5070andyourcomputer.Italsoletsyouselectaparallelcommunicationmodefordirectprinting.PressthedownarrowbuttonuntiltheblinkingcursoristotheleftofBaudRate.Toadjust thebaud rate,press the rightarrowbutton tohighlight thecurrentsetting.Next,presstheupordownarrowbuttonstoselectthedesiredbaudrate.Yourchoicesare300,600,1200,2400,4800,9600orparallel.Presstherightarrowbuttonafteryouhaveselectedthebaudratetocompletetheprocess.
Range300 to 9600 / RS-232 or – / Parallel
UNITSTheModel5070candisplay thedate ineitherUS (m.d.y)orEuropean (d.m.y)fashion.Thischoicecanbetoggledhere.PressthedownarrowbuttonuntiltheblinkingcursoristotheleftofUnits.Toselectthedesiredformat,presstherightarrowbuttontohighlightthecurrentsetting.Next,presstheupordownarrowbuttonstoselecteitherUSAorEurope.Presstherightarrowbuttonafteryouhaveselectedthedesiredunitstocompletetheprocess.
RangeEurope or USA
DATETheday,monthandyearvaluecanbesetwiththisfunction.PressthedownarrowbuttonuntiltheblinkingcursoristotheleftofDate.ToadjusttheDate,presstherightarrowbuttontohighlightthecurrentsetting.Thecursorwillmovetothefirstvariable(dayforEuropeanformatormonthforUSformat).Next,presstheupordownarrowbuttonstoselectthedesiredvalue.Presstherightarrowbuttontohighlightthenextdatefield(monthforEuropeanformatordayforUSformat).Next,presstheupordownarrowbuttonstoselectthedesiredvalue.Presstherightarrowbuttononcemoretohighlightthelastdatefield,whichisyear.Presstheupordownarrowbuttonstoselectthedesiredyear.Finally,presstherightarrowbuttonafteryouhaveselectedthedatesetuptocompletetheprocess.
Europe USAdd.mm.yyyy mm.dd.yyyy
Megohmmeter Model 5070 27
TIME (h:m)Timecanbesethere.A24-hourclockisusedintheModel5070.Therefore3:30pmwouldbeprogrammedinas15:30.PressthedownarrowbuttonuntiltheblinkingcursoristotheleftofTime.ToadjusttheTime,presstherightarrowbuttontohighlightthecurrentsetting.Thecursorwillmovetothehourselection.Next,presstheupordownarrowbut-tonstoselectthedesiredhourfrom0to24.Presstherightarrowbuttonagaintohighlightminutes.Next,presstheupordownarrowbuttonstoselectthedesiredminutesfrom0to59.Finally,presstherightarrowbuttonafteryouhaveselectedthetimesetuptocompletetheprocess.
4.1.3 SET-UP MenuTurningtherotaryswitchtoSET-UPgivesyouaccesstothemenuofallprogram-mablefunctions.Selectthefunctiontobemodifiedusingtheandbuttons.Movetheblinkingcursortothevaluetobemodifiedusingtheandbuttons.Adjustthevalueattheblinkingcursorusingtheandbuttons.Movebacktotheselect functionpositionbypressing theandbuttonsuntil theblinkingcursorisagaintotheleftofthefunction.PressingtheDISPLAYbuttonwhilemodifyingaparameterwillbringyoubacktothetopoftheSET-UPmenu.WhenyoufirstentertheSET-UPmodeadisplaysimilartothiswillappear:
SET-UPInstr.Nr. 9600004 SW Version 1.2
Display contrastAlarm SettingsAdjustable Voltage 1Adjustable Voltage 2Adjustable Voltage 3Timed Run (h:m)Sample Time (m:s)DAR (s/s)
80
50V100V250V0:100:10
30/60
• ThetoplineonthisscreenindicatesthatyouareinSET-UPmode.• LinetwoindicatestheModel5070’sInstrumentNumberandSoftwareVersion.• Theselectioncursorwillbeblinkingandpositionedtothe leftof the“Display
Contrast”parameter.
Toadjustthe“DisplayContrast”parameter,pressthebuttontomovetheblink-ingcursor todisplaycontrastvalue.Thedefaultvalue is80.Usetheandbuttons to lighten or darken the display.The higher the number the lighter thedisplaywillbe.Whenfinished,pressthebuttontomovethecursorbacktotheparameterselectionposition.Thearrowbuttonscanbeusedtomodifyanyparameter.
28 Megohmmeter Model 5070
4.2 MODE / PRINT Button
4.2.1 Primary Function - MODETheprimaryfunctionofthisbuttonisusedbeforethemeasurementtakesplacetodefinethemeasurementconditions.
NOTE: This button is inactive in the Step Voltage and SET-UP positions.
• PresstheMODEbuttononcetoaccessthelistofpossiblemeasurementmodes.Selectthemodeusingtheandbuttons.
• Tovalidatethemodeselected,presstheMODEbuttonagain.
The measurement mode choices are as follows:
MANUAL STOP
Thisistheconventionalquantitativeinsulationmeasurementmode.
The measurement is started by press-ingSTART/STOPbuttonandstoppedbypressingSTART/STOPbuttonagain.
In this mode, the user determines theduration of the test, which will be indi-catedbytheelapsedtimeindicator.
MANUAL STOP + DD The measurement is started by press-ingSTART/STOPbuttonandstoppedbypressingSTART/STOPagain.
1minute after the endof themeasure-ment,theinstrumentcalculatesanddis-playstheDielectricDischarge(DD)ratio.Thetimeremainingduringthisminuteisdisplayed.
TIMED RUNThismodeisusedtoperformameasure-ment foradurationdefined inadvance,with a predetermined number of mea-surement samples. The measurementisstartedbypressingtheSTART/STOP button and stops automatically afterthe time programmed by the user hasoccurred.
MODETotal Run Time
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1/10
MODETotal Run Time
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1/10
MODETotal Run Time 02:30:00
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1/10
Megohmmeter Model 5070 29
Thisduration(Duration)andthetimeintervalbetweensamples(Sample)mustbespecifiedwhentheTimedRunmodeisselected.
To set the Duration and Sample rate from the MODE screen proceed as follows:
• UsetheorbuttonstohighlightTimedRun.• PressthebuttontomovethecursortoDuration,thehourvaluewillbe
highlighted.• Usetheorbuttonstoselectthedesiredhoursfrom0to49.• Next,pressthebuttontohighlightminutes.• Usetheorbuttonstoselectthedesiredminutesfrom0to59.
The minimum selectable duration is 1 minute and the maximum is 49 hours and 59 minutes.
• Press thebutton until theminute value in the sample rate is high-lighted,thenusetheorbuttonstoadjusttheminutevaluebetween0 and 5.
• Next,pressthebuttonuntilthesecondsvalueishighlighted.• Usetheorbuttonstoselectthedesiredsecondsfrom1to59.
The shortest possible sample rate is 5 seconds and the longest sample rate is 5:00 minutes.
WhenfinishedwithDurationandSampleselections,press theorbuttonsagainuntiltheblinkingcursorisatTimedRun.
You are now ready to begin a Timed Run Test for the selected Test Voltage.
• PresstheYellowSTART/STOPbuttontobeginthetest.Thedisplaywillbrieflyshow“OK”followedbytheactivetestscreen.
• Whenthemeasurement isstarted, the timercountsdownshowing thetimeremaininginthemeasurement.
• WhentheRemainingTimeiszero,themeasurementisstopped.
Duringthetimedruntest,theintermediatesamplesareautomaticallystored.Theyareusedtoplotacurveof insulationresistancevstime.Thiscurvecanbedis-playedafterthemeasurementiscompletedbypressingtheYellow2ndbuttonandtheGRAPHbutton,aslongasnonewmeasurementhasbeenstarted.
Thesamplesand the curveareautomatically storedwith the final valueof theresistance,ifitisstored.
During the measurement, if the position of the rotary switch is changed, or the START/STOP button is pressed, the measurement is stopped.
30 Megohmmeter Model 5070
TIMED RUN +DDThismode is identical to theTimedRunexceptthat1minuteaftertheendofthemeasurement, the instrument calculatesand displays the Dielectric Discharge(DD).Themeasurementdurationisthere-forethedurationoftimedrun+1minute.The insulation resistance vs time curvecanbedisplayedafterthemeasurementbypressingtheYellow2ndbuttonandtheGRAPHbutton,aslongasnonewmea-surementhasbeenstarted(see§4.3.2foratypicalgraph).
DARThe DAR measurement is started bypressing the START/STOP button andstops automatically when the DAR ratiohasbeencalculated,e.g.after1minute,the time taken to measure the secondinsulationresistancevalueneededforthecalculation(theratiotimescanbemodifiedintheSET-UPmode).Thedefaultis30/60meaning thefirst readingwillbe taken in30secondsandthesecondreadingwillbetakenin60secondsfromtheStart.
PIThePImeasurementisstartedbypress-ing theSTART/STOP button and stopsautomaticallywhenthePIratiohasbeencalculated,e.g.after10minutes,thetimetaken tomeasure thesecond insulationresistancevalueneededforthecalcula-tion(theratiotimescanbeprogrammedintheSET-UPmode).
NOTE: In this mode, the DAR ratio will also be calculated automatically if the times needed to calculate it are less than the second time needed to calculate the PI ratio.
MODETotal Run Time 00:10:00
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1.0/10
MODETotal Run Time 00:01:00
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1/10
MODETotal Run Time 02:31:00
Manual StopManual Stop + DD Duration Sample (h:m) (m:s)Timed Run 02:30 01:40Timed Run + DDDAR (s/s) 30/60PI (m/m) 1/10
Megohmmeter Model 5070 31
NOTE
1. What is the DD (Dielectric Discharge index)?Inthecaseofmultilayerinsulation,ifoneofthelayersisdefectivebuttheresis-tanceofalltheothersishigh,neitherthequantitativeinsulationmeasurementnorthecalculationofthePIandDARqualityratioswillrevealtheproblem.Thismakesitimportanttoperformadielectricdischargetest,fromwhichtheDDRatiocanbecalculated.Thistestmeasuresthedielectricabsorptionofheteroge-neousormultilayerinsulationanddisregardsparallel-surfaceleakagecurrents.Itinvolvesapplyingatestvoltageforlongenoughtoelectrically“charge”theinsu-lationtobemeasured(typically,avoltageof500Visappliedfor30minutes).Attheendofthemeasurement,theinstrumentcausesarapiddischarge,duringwhichthecapacitanceoftheinsulationismeasured;1minutelater,theresidualcurrentcirculatingintheinsulationismeasured.
TheDDRatioisthencalculatedasfollows:DD = current measured after
1 minute (mA) / [test voltage (V) x measured capacitance (F)]
Theinsulationqualityrating,asafunctionofthevaluefound,isasfollows:
Value of DD Quality of InsulationDD > 7 Very Poor
DD between 7 and 4 PoorDD between 4 and 2 Doubtful
DD < 2 Good
Thedielectricdischargetestisespeciallywell-suitedtoinsulationmeasurementsonrotatingmachines,and ingeneral, to insulationmeasurementsonheteroge-neousormultilayerinsulationscontainingorganicmaterials.
2. What are the DAR (Dielectric Absorption Ratio) and the PI (Polarization Indexes)?
It isbeneficialtocalculateinsulationqualityratios,inadditiontothequantitativeinsulationresistancevalue,becausetheycanbeusedtoeliminatetheinfluenceofcertainparameterslikelytoinvalidatethe“absolute”insulationmeasurement.
Themostimportantoftheseparametersare:• Temperatureandrelativehumiditywithwhichinsulationresistancevariesto
aquasi-exponentiallaw.• Theleakagecurrents(capacitivechargingcurrent,dielectricabsorptioncur-
rent)arecreatedbytheapplicationofthetestvoltage.Eventhoughtheygraduallyfalloff,theyaffectthemeasurementatthestartforalengthoftimethatdependsonwhethertheinsulationisingoodconditionordegraded.
Theseratioscompletethe“absolute”insulationvalue,andreliablyreflectwhethertheinsulationlayersareingoodorpoorcondition.
32 Megohmmeter Model 5070
Inaddition,changesintheseratiosovertimecanbeobservedandusedforpre-ventativemaintenance(e.g.tomonitortheagingoftheinsulationofapopulationofrotatingmachines).
TheDARandPIratiosarecalculatedasfollows:
PI = R 10 min / R 1 min(2valuestobenotedduringa10minutemeasurementareattheendof1minuteand10minutes)
DAR = R 1 min / R 30 sec(2valuestobenotedduringa1minutemeasurementareattheendof30secondsandattheendof1minute)
Notethatthetimesof1and10minutesforthecalculationofPIand30&60sec-ondsforthecalculationofDARarethosecurrentlyconsideredstandardsandpro-grammedasdefaultsintheinstrument.TheycanbemodifiedinSET-UPmodetoadapttoapossiblechangeinastandardortotheneedsofaspecificapplication.
Interpretationoftheresults:
DAR PI Condition of Insulation
< 1.25< 1 Poor or
even Dangerous< 2
< 1.6 < 4 Good
> 1.6 > 4 Excellent
4.2.2 Secondary Function - PRINTThesecondaryfunctionofthisbuttongivesaccesstotheprintmenubelow.There are two or three choices in the print mode depending on when it isaccessed:
• Ifyouaccesstheprintmoderightafterthecompletionofatest,youwillsee“Printresult”asthefirstchoice.
• Ifyouaccesstheprintmodewithoutrunningatest,“Printmemory”willbeyourfirstchoice.
Print result:ImmediateprintingofameasurementfollowingameasurementorafteraccesstotheMR(MemoryRecall)mode.
Print memory:Printingofstoreddata.
Baud rate / Port:DisplayofbaudrateselectedintheSET-UPmenu.
PRINTPrint resultPrint memoryBaud rate / Port 9600 / RS232
Megohmmeter Model 5070 33
4.3 DISPLAY / GRAPH Button
4.3.1 Primary Function - DISPLAYTheprimaryfunctionofthisbuttonisusedtobrowsethroughthevariousscreensofinformationavailablebefore,duringorafterthemeasurement.Thescreensvarydependingonthemodeselectedbeforethemeasurementisstarted.This section, startingon the followingpage, shows typical screens that canbedisplayedforeachtestmode.
34 Megohmmeter Model 5070
MANUAL STOP mode
BEFORE the measurement:
FIXED VOLTAGE
500 V
Input voltageFrequencyInput currentDate: 09.28.2003
0.1V AC0.0Hz
24.6pATime: 22:39
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
Information Displayed: Information after pressing DISPLAY:
Test typeDC test voltage
AC/DC input voltageFrequency
Residual input currentDate and Time
AC/DC input voltageFrequency
Residual input currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
507V
kΩ MΩ GΩ TΩ
24.6pAElapsed time 00:00:43
234.5M
507V 24.6pAElapsed time 00:00:43
234.5M
DAR (30/60)PI (1/10)Capacitance
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageResidual current
Measurement durationInsulation resistance bargraph
Measured resistanceDC test voltageResidual current
Measurement durationDAR, PI, Capacitance
Megohmmeter Model 5070 35
AFTER the measurement:
507V 24.6pAElapsed time 01:02:43
234.5M
DAR (30/60)PI (1/10)Capacitance
2.641.05
320nF
FIXED VOLTAGE
500 V
Input voltageFrequencyInput currentDate: 09.28.2003
0.1V AC0.0Hz
24.6pATime: 22:49
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
Information Displayed:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI, Capacitance values
After 1st Press on DISPLAY:
Test type and test voltageAC/DC input voltage
FrequencyLeakage current
Date, time
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
36 Megohmmeter Model 5070
MANUAL STOP + DD mode
BEFORE the measurement:
FIXED VOLTAGE
500 V
Input voltageFrequencyInput currentDate: 10.08.2003
DD
0.1V AC0.0Hz
24.6pATime: 09:39
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
DD
Information Displayed: Information after pressing DISPLAY:
Test TypeDC test voltage
AC/DC input voltageFrequency
Residual currentDate, time
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
507V
kΩ MΩ GΩ TΩ
24.6pAElapsed time 00:00:43
234.5M
DD
507V 24.6pAElapsed time 00:00:43
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
DD
pA
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageLeakage current
Measurement durationInsulation resistance bargraph
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI, Capacitance
Residual current (calculation of DD)DD
Megohmmeter Model 5070 37
AFTER the measurement:
507V 24.6pAElapsed time 00:22:43
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
2.241.55
220nF11.55pA
DD
FIXED VOLTAGE
500 V
Input voltageFrequencyInput currentDate: 10.08.2003
DD
0.1V AC0.0Hz
24.6pATime: 10:09
Information Displayed: After 1st Press on DISPLAY:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI, Capacitance values
Residual current (calculation of DD)DD
Test TypeDC test voltage
AC/DC input voltageFrequency
Leakage currentDate, time
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
DD
507V 24.6pAElapsed time 01:22:43
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
2.241.55
320nF24.6pA
2.55
DD
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
After 1 Minute:
Measured resistanceDC test voltageLeakage currentTotal test time
DAR, PI, CapacitanceDD test current
DD
38 Megohmmeter Model 5070
TIMED RUN mode
BEFORE the measurement:
ADJUSTABLE VOLTAGE 2
2300 VTest Run Time 00:10:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V AC0.0 Hz
20.6pATime: 09:39
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pAAC
Information Displayed: Information after pressing DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyResidual current
Date, time
AC/DC input voltageFrequency
Residual currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
2307V
kΩ MΩ GΩ TΩ
24.6pARemaining time 00:09:43
234.5M
2307V 24.6pARemaining time 00:09:43
234.5M
DAR (30/60)PI (1/10)Capacitance
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageLeakage current
Remaining measurement timeInsulation resistance bargraph
Measured resistanceDC test voltageLeakage current
Remaining measurement timeDAR, PI, Capacitance
Megohmmeter Model 5070 39
AFTER the measurement:
2307V 20.6pAElapsed time 00:10:00
234.5M
DAR (30/60)PI (1/10)Capacitance
2.641.05
320nF
ADJUSTABLE VOLTAGE 2
2300 VTest Run Time 00:10:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V AC0.0 Hz
20.6pATime: 09:49
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pAAC
Information Displayed:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI, Capacitance values
After 1st Press on DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyLeakage current
Date, time
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
40 Megohmmeter Model 5070
TIMED RUN + DD mode
BEFORE the measurement:
ADJUSTABLE VOLTAGE 2
2300 VTest Run Time 00:10:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V AC0.0Hz
20.6pATime: 09:39
DD
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
DD
Information Displayed: Information after pressing DISPLAY:
Test type and DC test voltageProgrammed duration of the test
AC/DC input voltageFrequency
Residual currentDate, time
AC/DC input voltageFrequency
Residual currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
2307V
kΩ MΩ GΩ TΩ
24.6pAElapsed time 00:09:43
234.5M
DD
2307V 24.6pAElapsed time 00:09:43
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
pA
DD
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageLeakage current
Remaining measurement timeInsulation resistance bargraph
Measured resistanceDC test voltageLeakage current
Remaining measurement timeDAR, PI, Capacitance
Residual current (calculation of DD)DD
Megohmmeter Model 5070 41
AFTER the measurement:
2307V 24.6pAElapsed time 00:10:00
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
2.241.55
320nF11.55pA
DD
ADJUSTABLE VOLTAGE 2
2300 V
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V AC0.0 Hz
24.6pATime: 10:05
DD
Information Displayed: After 1st Press on DISPLAY:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI, Capacitance
Residual current (calculation of DD)DD
Test typeDC test voltage
AC/DC input voltageFrequency
Leakage currentDate, time
0.1 V
V
0.0Hz
0 250 500 750100 1000
24.6pAAC
DD
2307V 24.6pAElapsed time 00:10:00
234.5M
DAR (30/60)PI (1/10)CapacitanceDD currentDD
2.241.55
320nF11.55pA
2.55
DD
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
After 1 Minute:
Measured resistanceDC test voltageLeakage currentTotal test time
DAR, PI, CapacitanceDD test current
DD
42 Megohmmeter Model 5070
DAR mode
BEFORE the measurement:
FIXED VOLTAGE
5000 VTest Run Time 00:01:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V DC0.0Hz
20.6pATime: 20:02
DAR
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pADC
DAR
Information Displayed: Information after pressing DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyResidual currentDate and Time
AC/DC input voltageFrequency
Residual currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
5007V
kΩ MΩ GΩ TΩ
20.6pAElapsed time 00:00:46
234.5M
DAR
5007V 20.6pAElapsed time 00:00:46
234.5M
DAR (30/60)PI (1/10)Capacitance
DAR
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageLeakage current
Remaining measurement timeInsulation bargraph
Measured resistanceDC test voltageLeakage current
Remaining measurement timeDAR, PI, Capacitance in process
Megohmmeter Model 5070 43
AFTER the measurement:
5007V 20.6pAElapsed time 00:01:00
234.5M
DAR (30/60)PI (1/10)Capacitance
2.64
320nF
DAR
FIXED VOLTAGE
5000 VTest Run Time 00:01:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V DC0.0 Hz
20.6pATime: 20:03
DAR
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pADC
DAR
*NOTE: Because the test will stop after the DAR calculation, PI will not be calculated if the time values for this test are longer than those set for DAR.
Information Displayed:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI*, Capacitance
After 1st Press on DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyLeakage currentDate and time
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
44 Megohmmeter Model 5070
PI mode
BEFORE the measurement:
FIXED VOLTAGE
5000 VTest Run Time 00:01:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V DC0.0Hz
20.6pATime: 20:02
PI
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pADC
PI
Information Displayed: Information after pressing DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyResidual currentDate and Time
AC/DC input voltageFrequency
Residual currentVoltage bargraph
DURING the measurement:
10 100 1 10 100 1 10 100 1 10
5007V
kΩ MΩ GΩ TΩ
20.6pAElapsed time 00:00:46
234.5M
PI
5007V 20.6pAElapsed time 00:00:46
234.5M
DAR (30/60)PI (1/10)Capacitance
PI
Information Displayed: Information after pressing DISPLAY:
Measured resistanceDC test voltageLeakage current
Remaining measurement timeInsulation bargraph
Measured resistanceDC test voltageLeakage current
Remaining measurement timeDAR, PI, Capacitance in process
Megohmmeter Model 5070 45
AFTER the measurement:
5007V 20.6pAElapsed time 00:10:00
234.5M
DAR (30/60)PI (1/10)Capacitance
2.74
320nF
PI
FIXED VOLTAGE
5000 VTest Run Time 00:10:00
Input voltageFrequencyInput currentDate: 10.18.2003
0.1V DC0.0 Hz
20.6pATime: 10:03
PI
0.1 V
V
0.0Hz
0 250 500 750100 1000
20.6pADC
PI
Information Displayed:
Measured resistanceDC test voltageLeakage current
Measurement durationDAR, PI*, Capacitance
After 1st Press on DISPLAY:
Test typeDC test voltage
Programmed duration of the testAC/DC input voltage
FrequencyLeakage currentDate and time
After 2nd Press on Display:
AC/DC input voltageFrequency
Leakage currentVoltage bargraph
46 Megohmmeter Model 5070
4.3.2 Secondary Function - GRAPH
AttheendofaprogrammedTimeTest(TimedRunorTimedRun+DD)press-ingthe2nd + GRAPHbuttonswillbringupadisplayoftheInsulationResistanceversustimecurve.
The resolution of this presentation isdependenton thesample timeselectedbeforethetestorduringset-up.
The and buttons can be used tomove the vertical cursor along the timeaxistodisplaytheInsulationResistanceandelapsedtesttimeatthecursorposi-tion.
PressingtheDISPLAYbuttonreturnstotheDigitalPresentationofResults.
4.4 / TEMP Button
4.4.1 Primary Function - Selectstheparametertobemodifiedtotheleftormovesthecursoronagraphscreentotheleft.
4.4.2 Secondary Function - TEMP
At thecompletionofa test,press the2nd + TEMPbuttons.Thisbringsup theTemperatureCorrectiondisplay.
ThisfunctionprovidestheabilitytodisplayandstoretemperaturecorrectedInsula-tionResistancereadings.Therefore,testscomparedtohistoricaldatacanallbereferencedtoacommontemperatureforbetterqualitativeanalysis.
NOTE:• TheTEMPfunctioncanbeactivatedonlyafterameasurementhasbeen
completedeitherbeforeorafteritisstored.• If the result of yourmeasurement is outside of the instrument’s range
(thedisplayshowsthe<or>symbolnexttothereading),theTempera-tureCorrectionfunctioncannotbeapplied.
• TemperaturecorrectionisnotavailableonStepVoltagetests.
GRAPH
5078V
30002500200015001000500
0 0:30 1:00 1:30 2:00 2:30 3:00
MΩ00:02:30328.5MΩ
Megohmmeter Model 5070 47
Procedure:
• You havemade ameasurement and not yet stored it.Check that theresultiswithintheInstrument’smeasurementrange.
• EntertheTEMPmodebypressingthe2nd + TEMPbuttons.
• Entertheestimatedtemperature(ProbeTemperature)atwhichyoumadethemeasurement(bydefault,theinstrumentoffersthevaluesetinSET-UP).
• With the blinking cursor next to“ProbeTemperature”,pressthebutton to activate probe tempera-ture.Use theorbuttons toincreaseordecreasethetempera-ture.
• Presstheorbuttonstomovethe cursor back to the selectionposition.
• Next, make sure “ResistanceCorrection”isturned“on”toperformthecalculation(thedefaultvalueinSET-UPis“off”).
• Pressthebuttontoselect“Resis-tance Correction”. Press the buttontohighlight“off”,thenpresstheorbuttonstoselect“on”.
• Thecalculationisperformedimme-diately and the result is displayedas Rc along with the ReferenceTemperature.
• Thisindicateswhatthemeasurementresultwouldhavebeenattherefer-encetemperature.
• TheReferenceTemperature(RcReferenceTemperature)andthecoef-ficientΔTindicatedandusedforthecalculationarethosedefinedinSET-UP.
Note: Tostorethiscalculation,pressthe2nd + TEMPbuttonsagain(OKisthendisplayed)beforestoringeverything.
NOTE:• Duringtheprocedure,pressingtheDISPLAYbuttonorturningtherotary
switchcancelsthecalculationinprogress.• IfthecoefficientΔTusedforthecalculationisnotknown,theinstrument
cancalculateitinadvanceusingatleast3storedmeasurementsmadeatdifferenttemperatures(see§4.10).
TEMPERATUREProbe TemperatureResistance CorrectionRcReference Temperature∆T for R/2
23.7°Con
28.5°C23.0°C
R measuredRc at 28.5°C
273.7MΩ328.5MΩ
TEMPERATUREProbe TemperatureResistance CorrectionRcReference Temperature∆T for R/2
23.7°Con
28.5°C23.0°C
R measuredRc at 28.5°C
273.7MΩ328.5MΩ
48 Megohmmeter Model 5070
The calculation is performed as follows:Theinsulationresistancevarieswiththemeasurementtemperature.Thisdepen-dencecanbeapproximatedbytheexpression:
Rc=KT*RTwhere: Rc: CorrectedInsulationResistancetothereferencetemperatureRc ReferenceTemperature
RT: MeasuredInsulationResistanceatProbeTemperature
KT: CoefficientTdefinedasfollows: KT =(1/2) ((RcTemperatureReference-T)/ΔT) T: ProbeTemperature ΔT: TemperaturechangeforwhichtheInsulationResistanceis divided by 2 Rc Temperature Reference: TemperaturetowhichtheInsulation Resistancemeasurementisadjusted
Example: A motor winding is tested at 1000V in a 68°F environment. At the end of the timed test, the Insulation Resistance Value is 991 megohms. All the historical data is at 104°F. The corrected Insulation Resistance value corrected to 104°F for this motor is calculated by the Model 5070 to be 284.4 megohms using the formula above when temperature correction is activated.
4.5 / SMOOTH Button
4.5.1 Primary Function -Decreasesthevalueoftheflashingparameterdisplayedorselectsthenextpara-meter down.
4.5.2 Secondary Function - SMOOTHTheSMOOTHfunction(activatedbypressingthe2nd + SMOOTHbuttons)acti-vates/deactivatesaninsulationmeasurementdigitalfilter.Only the display is affected (which is smoothed), not themeasurements. Thisfunctionisusefuliftheinsulationvaluesdisplayedareveryunstable.
Thefilteriscalculatedasfollows:RSMOOTH=RSMOOTH+(R–RSMOOTH)/N
SinceNissetto20,thetimeconstantofthisfilterisapproximately20seconds.Therefore,displayedresultsarepresentedmoresmoothly.
Megohmmeter Model 5070 49
4.6 / ALARM Button
4.6.1 Primary Function -Increasesthevalueoftheflashingparameterdisplayedorselectsthenextparam-eterup.
4.6.2 Secondary Function - ALARMToactivatetheALARMfunctionbeforeorduringatest,pressthe2nd + ALARM buttons.ThewordALARMwillappearatthetoprightsideofthedisplay.Iftheinsulationresistancedropsbelowthesetvalueatanytimeduringthetest,theALARMsymbolwillflashandthebuzzerwillbecontinuouslyon(ifactivated),aslongasthealarmconditionexists.Thealarmfunctioncanbedeactivatedatanytimebypressingthe2nd + ALARM buttonsagain.
4.7 / Button
4.7.1 Primary Function -Selectstheparametertobemodifiedtotherightormovesthecursoronagraphscreentotheright.
4.7.2 Secondary Function -
Toactivatethedisplaybacklight,pressthe2nd + buttons.
Todeactivate,pressthe2nd + buttonsagain.
50 Megohmmeter Model 5070
4.8 MEM / MR Button
4.8.1 Primary Function - MEM (Save)Results can be recorded in the instrument’s memory and stored along withaddressesdefinedbyanobjectnumber(OBJ)andatestnumber(TEST).Anobjectrepresentsa‘box’intowhichyoucanplace99tests.Anobjectcanrep-resentasinglepieceofequipment,suchasamotororpumporadepartmentoranentirefacility.Testswillrepresenttheinsulationresistancemeasurementscarriedoutontheobject.
Example: If the object is a 3-phase motor, then each test number will represent a specific insulation resistance measurement.
e.g.- Test1=PhaseAtohousing Test2=PhaseBtohousing Test3=PhaseCtohousing and so on.
When the MEM button is pressed, the following screen is displayed:• TheflashingcursoridentifiesthefirstfreeObj:Testlocation. Here - 02 : 59(theObj.numberisthat
of the last measurement stored, buttheTestnumberisincrementedby1).
• Itisalwayspossibletomodify Obj.Testusingthe,,, buttons.• If a new Obj. is selected, the test
numberissetto01automatically.• If you select amemory address that
isalreadyoccupied,thescreentotheright isdisplayedandpromptsyoutoconfirmorcanceldeletionofthecon-tentofthataddress.
• To confirm overwriting, press the button.
• To cancel, press the button tohighlightCANCEL, thenpress thebuttontoconfirm.
When the MEM key is pressed again, themeasurementresultsarerecordedatthe selectedmemory address (whetheroccupiedornot).
Allinformationfromthemeasurementwillbestoredatasinglelocationinmemory:date,time,testmodeandvoltage,insulationresistance,capacitance,residualcur-
MEMORYStore
Obj. Test Date Time Fct.02 59 12.07.2003 22:39 3800V02 58 11.29.2003 15:47 50V02 03 11.24.2003 15:04 2150V02 02 10.29.2003 21:45 975V02 01 09.30.2003 02:43 5000V01 02 09.02.2003 15:07
MEMORYStore
!WARNING!Old data set willbe overwritten !
O.K.
CANCEL
Megohmmeter Model 5070 51
rent,and,possibly,DAR,PI,DD(ifavailable), temperaturecorrectedresistanceandtheR(t)graph.
WARNING: If a button other than MEM is pressed, or the selector switch is moved before pressing MEM a second time, the instrument exits from MEM mode without saving the results.
Memory Capacity• Totalmemoryspace:128kb• Datamanagement:8kb• Freememoryspace:120kb
An insulation measurement requires 80 bytes. Therefore, approximately 1500insulationmeasurementscanbestored.
Free Memory SpaceThisfunctionisautomaticallyactivatedwhenaresultissaved.PresstheMEMbuttononcetobringupthefirstavailableObjectandTeststoragelocation.Abargraphisdisplayedcorrespondingtotheavailablememorylocation.
• Iftheentirememoryisfree,allofthebargraphsegmentsappear.• Iftheentirememoryisfull,thearrowtotheleftofthebargraphflashes.• Assoonasthestorageiscomplete,thebargraphdisappears.
Eachsegmentofthebargraphequalsapproximately50recordings.
4.8.2 Second Function - MR (Recall)TheMRfunctionallowsyoutorecallanyofthestoreddatafrommemory,regard-lessofthepositionoftherotaryselectorswitch,exceptOFForSETUP.
When the MR button is activated, the following screen is displayed:• TheflashingcursoridentifiesthelastoccupiedObj.andTestnumber. Here - 47 : 99
• Usethe,,,buttonstoselectthedesiredObj.andTestnumber.
• AfterselectingtheObj.andTest,pressthebuttontoaccessthefirstitemofinformation relative to this measure-ment.
• Toaccessmoredata,pressDISPLAY repeatedly,orGRAPH,ifthemodeselectedbeforethestartofthemeasurementallows.
To exit the MR function,press theMRbuttononceagainor turn theselectorswitchtoanotherposition.
MEMORYRecall Obj. Test Date Time Fct.
47 99 12.15.2003 07:04 625V13 59 12.07.2003 22:39 3800V13 58 11.29.2003 15:47 50V02 03 11.24.2003 15:04 2150V02 02 10.29.2003 21:45 975V02 01 09.30.2003 02:43 5000V01 02 09.02.2003 15:07
52 Megohmmeter Model 5070
4.9 Clearing the MemoryInSET-UP,select“Clearmemory”byusingthebuttontohighlightthisfunction.Pressthebuttontoenterthismode.
To erase the content of one or more specific OBJ : TEST numbers:• Select“SelectDataSetstoClear”bypressingthebutton.• Then, select eachmemory to be erased using the , buttons to
chooseitandthebuttontoselectit.Thebuttonwilldeselectit.• ValidatebypressingDISPLAY.Theoperationisconfirmedbypressing
thebuttonwiththeOKoptionhighlighted,orcancelledbypressingthebuttonwiththeCANCELoptionhighlighted.
Rc reference temperature∆T for R/2Calculate ∆T from MemoryMaxumum Output VoltageSet Default ParameterClear MemoryV Disturbance / V OutputBuzzer
40°C10°C
5100V
30%on
SET-UPInstr.Nr. 9600004 SW Version 1.2
SET-UPClear memory:
Select Data Sets to ClearClear All
SET-UPClear memory: Obj. Test Date Time Fct.
47 99 15.12.2003 07:04 625V13 59 07.12.2003 22:39 3800V13 58 29.11.2003 15:47 50V02 03 24.11.2003 15:04 2150V
SET-UP
!WARNING!All selected data sets
will be cleared!
O.K.
CANCEL
To erase the entire memory:• Select“ClearAll”bypressingthebuttontohighlightitandthebutton
tochooseit.• Theoperationisconfirmedorcancelledbypressingthebuttonwhen
theappropriatechoiceishighlightedasdescribedabove.
SET-UPClear memory:
Select Data Sets to ClearClear All
SET-UP
!WARNING!All data sets
will be cleared!
O.K.
CANCEL
Megohmmeter Model 5070 53
4.10 Calculation of ΔT from Stored DataThecoefficientΔTisusedtocalculatetheinsulationresistanceatatemperatureotherthanthemeasurementtemperature.Itisthetemperaturedifferenceatwhichtheinsulationresistanceconcernedisdividedby2.
Thiscoefficientisvariableanddependsonthetypeofinsulation.Whenitisnotknown,theinstrumentcancalculateitfromthreeormorestoredmeasurements.
NOTE: These 3 measurements must have been made on identical insu-lation but at 3 different temperatures, and the temperatures must have been recorded using the 2nd + TEMP buttons at the same time as the measurements, without applying the correction (Resistance Correction OFF).
• IntheSET-UPmode,select“CalculateΔTfromMemory”andpressthebutton.Thedisplayshowsallvaluesrecordedwithatemperature.
• Selectatleast3measurementsusingthe,,,buttons.
• ΔT is calculated and recorded automatically once 3 stored measure-mentshavebeenselected,andwillbeupdatedifmoremeasurementsare selected.
• Thelargerthenumberofmeasurements,themoreaccuratethecalcula-tionofΔT.
NOTE: This calculation is available only for resistance values < 200GΩ.
Calculate ∆T from MemoryMaxumum Output VoltageSet Default ParameterClear MemoryV Disturbance / V OutputBuzzerPower DownBaud Rate
5100V
10%onon
9600 / RS232
SET-UPInstr.Nr. 9600004 SW Version 1.2
SET-UP ∆T Calculation for R/2 23.7°C Obj. Test Res. Volt. Temp.
47 99 228.5MΩ 5078V 23°C13 59 208.5MΩ 5078V 30°C13 58 178.5MΩ 5078V 37°C02 03 328.5MΩ 5078V 23°C02 02 328.5MΩ 5078V 23°C02 01 328.5MΩ 5078V 23°C
54 Megohmmeter Model 5070
4.11 Maximum Output VoltageIntheSET-UPmenu,select“MaximumOutputVoltage”pressingthebuttontohighlightitandthebuttontochooseit.
Adjustthemaximumoutputvoltageusingthe,buttons.
This function prohibits the use of testvoltageshigher than theselectedmaxi-mum output voltage for the insulationmeasurement.
The instrument can then be used byless experienced personnel for specificapplicationswhere it is importantnot toexceedamaximumtestvoltage.
Example: if the maximum output voltage is set to 750V and the measurement is made in the 5000V switch position, only 750V will be generated.
4.12 List of Error CodesIfaninconsistencyisdetectedwhentheinstrumentisstarteduporinoperation,thedisplayunitindicatesanerrorcode.Theformatofthiserrorcodeisa1or2digitnumber.Thisnumberidentifiestheproblemandtheactiontobetaken.
Here are some examples of possible errors:
Codes from 0 to 9 identify fatal errors in the hardware. The instrument must be returned to AEMC® Instruments for corrective action.
Codes from 20 to 25 identify semi-fatal errors, except for codes 21 and 25. The instrument must be returned to the factory for corrective action.
Error 20 CommunicationfailedError 21 CheckofoptionsfailedError 22 CheckofcontentsfailedError 23 CheckofcalibrationvaluesfailedError 24 CheckofinstrumentidentificationnumberfailedError 25 Checkofprintfilefailed
Fornon-fatalerrors21and25,itisnotnecessarytoreturntheinstrument.SimplyusetheSET-UPmodetorestorethedefaultparameters(SetDefaultParameter).
Data Storage Error: Whenitisimpossibletostoredata,theentirememorymustbeerasedusingthe“ClearMemory”functionintheSET-UPmode(see§4.9).
Calculate ∆T from MemoryMaximum Output VoltageSet Default ParameterClear MemoryV Disturbance / V OutputBuzzerPower DownBaud Rate
5100V
10%onon
9600 / RS232
SET-UPInstr.Nr. 9600004 SW Version 1.2
Megohmmeter Model 5070 55
CHAPTER 5
MEASUREMENT FUNCTIONS
5.1 AC/DC Voltage• Turntherotaryselectorswitchtoanyinsulationposition(otherthanOFFor
SET-UP).
• TheinstrumentisnowautomaticallyinAC/DCvoltagemeasurementmode.
• Thevoltagebetweentheinputterminalsismeasuredatalltimesandindicatedonthedisplaynexttotheinputvoltageheading.
• Also,assoonastheswitchisturned,thefrequencyandtheresidualDCcurrentattheterminalsoftheinstrumentaremeasured.Theresidualcurrentismea-suredinordertoevaluateitseffectontheinsulationmeasurementabouttobeperformed.
NOTE: Measurement is prohibited if an external voltage above a preset value is present at the terminals before pressing START/STOP.
Similarly, if an interference voltage of a preset value is detected during measurement, the measurement is stopped and that voltage is indicated (see V Disturbance / V Output on page 25).
5.2 Insulation MeasurementWhentheswitchisturnedtoaninsulationresistancemeasurementposition,oneoffollowingappears:
Case 1Youselectaninsulationmeasurementwith a fixed/standard test voltage, inmanualmode.
SwitchPositions:500V - 2TΩ1000V - 4TΩ2500V - 10TΩ5000V - 10TΩ
FIXED VOLTAGE
2500 V
Input voltageFrequencyInput currentDate: 09.28.2003
230V AC50.0 Hz24.6nA
Time: 22:39
56 Megohmmeter Model 5070
Case 2Youselectaninsulationmeasurementwithoneoftheselectabletestvoltages.
SwitchPosition:50 to 5000V
You can choose from one of the threeselectedvoltagespredefinedinSET-UPusing the and buttons, selectingadjustable voltage 1, 2 or 3, or defineanother voltage by selecting it with the button to highlight the test voltageandadjusting itwith theandbut-tons.The new selected voltagewill notbesavedwhentheinstrumentisshutoffortherotaryswitchismovedtoanotherposition.
Case 3You select an insulation measurementwith a test voltage that varies in steps(thisisthe“StepFunction”mode).
SwitchPosition:Step Voltage
You can choose from the three storedstepvoltageschemesusing theandbuttons.
• Pressing the START/STOP button immediately begins the measurement process.
Ifthebeeperisselectedas“ON”intheSET-UPmode,anaudiblebeepisemit-tedevery10secondstoindicatethatatestisinprocess.
A number of special functions can be performed during the test. Chapter 4describesthesefunctions.
WARNING: Insulation measurements cannot be started if there is an excessively high external voltage on the “+” and “–” terminals.
TheModel5070willautomaticallyinhibittesting.
ADJUSTABLE VOLTAGE 2
2300 V
Input voltageFrequencyInput currentDate: 09.28.2003
20V AC50.0 Hz24.6nA
Time: 22:39
STEP FUNCTION 1
Test Run Time 08:38:30
Min: 2300V Max: 3900V
Input voltageFrequencyInput currentDate: 09.28.2003
1V AC50.0 Hz24.6nA
Time: 22:39
Megohmmeter Model 5070 57
• When the START button is pressed,iftheexternalvoltageoftheterminalsoftheModel5070isgreaterthatthevalueVpeakdefinedintheset-upmodeanddescribednext,theinsulationtestisnotstartedandanaudiblealarmisemitted;theinstrumentthenreturnstoautomaticvoltagemeasurementmode.
Vpeak≥dlStxVN where -Vpeakistheexternalvoltage,(peakorDC)atthe+and–terminals
oftheModel5070. -dlStisthecoefficientthatcanbeselectedinSET-UPat3%
(defaultvalue),10or20%. -VNisthetestvoltageselectedfortheinsulationmeasurement.
Example A: The test is to be conducted at 2500V, dISt is set to 3%. Therefore, before the test starts, a voltage present at the “+” and “-” terminals of 75V will cause the Model 5070 to inhibit testing. (Vpeak = (0.03 x 2500V) = 75V)
Similarly,ifduringtheinsulationtest,anexternalvoltagegreaterthantheVpeak(asdefinedbelow)isdetected,themeasurementisstoppedandthesymbol appearsnexttothevalueoftheexternalvoltagemeasured.
Vpeak≥(dlSt+1.05)xVN, where-Vpeakistheexternalvoltage,(peakorDC)atthe+and–terminals
oftheModel5070. -dlStisthecoefficientthatcanbeselectedinSET-UPat3%
(defaultvalue),10or20%. -VNisthetestvoltageselectedfortheinsulationmeasurement.
Example B: If the conditions defined in Example A were programmed and the test was started, a disturbance voltage (change of voltage) of 2700V would abort the test. (Vpeak = (0.03 + 1.05) (2500V) = 2700V)
Note:ThedlStfactorisselectedtooptimizethemeasurementbuild-uptime.
Ifthereisnoleakagevoltage,dlStcanbeadjustedtoitsminimumvaluetoobtaintheshortestpossiblemeasurementbuild-uptime.
Ifthereisalargeleakagevoltage,dlStcanbeincreasedsothatthemeasurementwillnotbeinterruptedassoonasanegativealternationoccursduringthegenera-tionofthetestvoltage;thishelpsoptimizethemeasurementbuild-uptimeinthepresenceofaleakagevoltage.
• Pressing the START/STOP button again stops the measurementIfthe“programmedtimetest”mode(TimedRunorTimedRun+DD)wasselectedasthetestmode,themeasurementisstopped(withoutpressingtheSTART/STOP button)attheendofthetesttime.
58 Megohmmeter Model 5070
Similarly,iftheDARorPImodeisselectedasmeasurementmodebeforethetest,themeasurementisstoppedautomaticallyafterthetimeprogrammedtocalculatethemhasoccurred(timedefinedinSET-UP).Anumberofspecialfunctionscanbeusedduringthemeasurement(see§4).
5.3 Capacitance MeasurementThecapacitancemeasurement is performedautomatically during the insulationmeasurement,andisdisplayedafterthemeasurementstopsandthecircuithasbeendischarged.
5.4 Residual Current MeasurementTheresidualcurrentcirculatingintheinstallationismeasuredanddisplayedauto-maticallyuponconnectiontotheinstallation,itisallmeasuredduringandaftertheinsulationmeasurement.
Megohmmeter Model 5070 59
CHAPTER 6
OPERATION
NOTE: Charge the instrument fully before use.
6.1 Performing MeasurementsTobeginan insulationresistance test,first insert thecablesasnecessary, thenturntherotaryswitchtotheappropriatetestvoltageposition.
Theinstrumentcanmeasureinsulationvaluesfrom10kΩ to 10TΩ,dependingonthetestvoltageselected-from40Vto5100VDC.
Thescreendisplays:
• Thebatterysymbolandbatterychargecondition
• Thetestvoltageselected• The voltage, frequency and residual
currentattheinputterminals• Thedateandtime
ConnecttheRed(+)andtheBlack(-)cablestothetestobject.ConnecttheBlueGuardjumperandcable,ifrequiredforthetest(seeAppendixA“When to use the Guard Terminal”).
Next,(unlessthestepfunctionmodeisselected)selectthemeasurementmodetobeused(ManualStop,ManualStop+DD,TimedRun,TimedRun+DD,DARorPI)bypressingtheMODEbutton(see§4.2.1)
• PresstheSTART/STOPbuttontobeginthemeasurementtest.
If the voltage present is greater than the maximum allowed value, the measurement will be prohibited.
TheDISPLAYbuttoncanbeusedtoscrollthroughtheinformationavailableduringthetest.Thisinformationdependsonthemeasurementmodeselected(see§4.2.1).Iftheinsulationvaluesdisplayedareveryunstable,adigitalfiltercanbeactivatedbypressingSMOOTHtosmooththem(see§4.5.2).
FIXED VOLTAGE
2500 V
Input voltageFrequencyInput currentDate: 09.28.2003
230V AC50.0 Hz24.6nA
Time: 22:39
60 Megohmmeter Model 5070
ThealarmmodecanbeactivatedbypressingtheALARMbutton.Anaudiblebeepwillcontinuouslysound if themeasurement result isbelow thevaluedefined inSET-UP(seepage20).
PresstheSTART/STOPbuttonagaintostopthetest.
Thelastresultremainsdisplayeduntilthenextmeasurementismadeortheswitchisturned.
Whentheinsulationmeasurementhasstopped,thedeviceundertestwillbeauto-maticallydischargedbytheModel5070.
TheDISPLAYbuttoncanbeusedtoviewthetestresultsavailableafterthetest.
Thisinformationdependsonthemeasurementmodeselected(see§4.2.1).
Ifthemeasurementmodewaseither“TimedRun”or“TimedRun+DD”,pressingtheGRAPHbuttondisplaystheinsulationmeasurementversustimecurve(see§4.3.2).
PresstheTEMPbuttontocorrectthemeasurementresulttothereferencetem-peraturedefinedinSET-UP(see§4.10).
6.2 Step Function ModeThisfunctionisbasedupontheprinciplethatidealinsulationproducesthesameresistancenomatterwhatthetestvoltageapplied.
Anynegativevariationofthisresistancemeansthattheinsulationmaybedefective.Theresistanceofdefectiveinsulationwilldecreaseasthetestvoltageincreases.
Thisphenomenon is rarelyobservedwith “low” test voltages, thereforeat least2500Vmustbeapplied.
Theusualtestconditionisavoltageincreasingin5steps,eachlastingfor1minuteminimum.
Assessmentoftheresult:
• A deviation of the resistance= f (test voltage) curve that exceeds 500ppm/Vgenerallyindicatesthepresenceofmoldorotherdeterioration.
• Alargerdeviationorasuddendropindicatesthepresenceoflocalizedphysicaldamagesuchasarcingorperforationoftheinsulation,etc.
Megohmmeter Model 5070 61
Procedure:• IntheSET-UPmenu,select“SetStep
Function1,2or3”byscrollingdownto set Step Function 1, 2 or 3 usingthebutton.Press thebutton toenter the Set-up mode for the pro-fileselected.Thescreenon the rightshows the default profile for StepFunctionNumber3.
• Define the Step Function and thedesirednumberofmeasurementsam-ples (R(t) sample)by scrolling to thedesiredStepusingtheorbuttonsfollowedbythebuttontoaccesstheselectedsteps,voltageandtimevariables.AdjustthevoltagefortheStepbypressingtheorbuttons.Then,pressthebuttontomovetheselectioncursortothedurationsetting.Adjustthehoursandminutesforthestepinthesame fashionused toselect thevoltage.Whenfinished,press thebuttonuntilthecursorisagainintheStepColumn.Repeatthisprocessforeachofthefivesteps.
If a Step is not used, select “---” as the duration. Next, adjust the sample rate by the same procedure using theandbuttons to select and adjust the sample rate.
• OncetheStepFunctionisdefined,turntheselectorswitchtoStepVoltage(thedesiredprofile1,2or3)usingthebuttons.
• Then,startthemeasurementbypressingtheSTART/STOP button.
Duringthemeasurement,thefollowingscreenscanbeaccessedbypressingtheDISPLAYbutton:
10 100 1 10 100 1 10 100 1 10
4078V
kΩ MΩ GΩ TΩ
24.6pARemaining time 00:01:43
234.5M
4078V 24.6pARemaining time 00:01:43
234.5M
∆R∆V∆R/(R*∆V) (ppm/V)Capacitance
MΩ3000V
SET-UPRamp 3 definition: Step Voltage Duration (h:m)
1 1000V 01:00 2 2000V 01:00 3 3000V 01:00 4 4000V 01:00 5 5000V 01:00 Total duration (h:m) 05:00R(t) sample (m:s) 00:20
62 Megohmmeter Model 5070
Attheendofthemeasurement,thefollowingareindicated:
• The difference ΔR in insulation resis-tancebetweenthefinalresistance(withthe highest test voltage) and the initialresistance(withthelowesttestvoltage)
• ThedifferenceΔVbetweenthefinalandinitialtestvoltages
• Theslopeofthecurveinppm/V• Thecapacitance
Pressing the GRAPH button displays theresistanceversusappliedtestvoltagecurve.
Usingtheandbuttons,youcanscrollthroughthevarioussamplesrecordedandforeachsee:• Theinsulationresistancevalue• Theappliedtestvoltage• Thetimeofmeasurement
6.3 Operation ExamplesConnection diagram for measurement of low resistance insulation(e.g. motor)
+
-
MRED
BLACK
5078V 24.6pAElapsed time 00:05:00
234.5M
∆R∆V∆R/(R*∆V) (ppm/V)Capacitance
8.5MΩ4000V
0.28320nF
ResistanceOutput VoltageElapsed Time
30002500200015001000500
50004000300020001000
0 1:00 2:00 3:00 4:00 5:00
MΩ
328.5MΩ5078V DC
04:20
Megohmmeter Model 5070 63
When measuring high levels of insulation(>1GΩ),itisadvisabletousethe“G”guardterminaltoeliminatetheinfluenceofsurfaceleakagecurrents.Theguardisconnectedbetweenthetwomeasurementcontactpoints,andthesurfacesuscep-tibletosurfacecurrents,(e.g.dusty,dampcableortransformerinsulation).Inthiscase,alligatorclipsarepreferabletohand-heldtestprobes.Assoonastheinsulationmeasurementisstopped,thetestcircuitisautomaticallydischargedusingtheinstrument’sinternaldischargefeature.
Connection diagram for measurement of high resistance insulationa) Exampleofamotor(reductionofcapacitiveeffects)
+
G
-
M
REDBLUE
BLACK
BLUE
JUMPER
b) Exampleofacable(reductionofsuperficialleakeffects)
G
-
+External insulator Braid
CableGuard
Insulator
RED
BLUE
BLACK
BLUE
JUMPER
64 Megohmmeter Model 5070
6.4 Printing Measured Values (MODE / PRINT Button)Touseaserialprinter,firstchoosetheappropriatecommunicationbaudrateintheSET-UPmenu,between300...9600baud.Thenprogramtheprintertothe5070format.Therearetwoprintmodes:
• Instantaneousprintingofmeasurement(PRINT)• Printingofrecordeddata(PRINTmemory)
Pressing the PRINT button gives access to the following menu:
• Print result: Immediateprintingofameasurement followingthatmea-surementorafteraccessingvaluesintheMRmode.
• Print memory:Printingofstoreddata.
• Baud rate / Port: BaudrateadjustedintheSET-UPmenu.Thechoicesare300,600,1200,2400,4800,9600orparallel.
After selection of the print mode :
• If the transmission of data to the printer is successful, the COMsymbolflashesatthetopleftofthedisplayunit.
• If a problem occurs, theCOMsymbolremainslitsteadilyatthetopleftofthedisplayunit.
6.5 Instantaneous Printing of Measurements (Print Result)
Whenthisprintmodeisselected,the following are printed,inorder:
• Generalinformationconcerningthemeasurement
• Themeasurementresult
• IftheTEMPfunctionwasactivated,themeasurementresultreferredtothereferencetemperature
• ForaTimedRuntest,thelistofrecordedsamples
To stop printing,movethepositionoftheselectorswitchtoanyotherposition.
Megohmmeter Model 5070 65
Dependingonthefunctionused,thefollowingformatsareobtained:
Any measurement except step function measurementsAEMC Instruments Model 5070
Instrument number: 000 001
Company:...........................
Address:...........................
...................................
Tel.:..................
Fax:...................
Email:.................
Description:.......................
OBJECT: 01 TEST: 01 (printed only in MR mode)
INSULATION RESISTANCE TEST
Date 01.31.2003
Starting time: 14h55
Running time: 00:15:30
Temperature: 23°C
Relative humidity: .... %
Test voltage: 1000 V
Insulation resistance: 385 GOhm
—————————————————-
Rc - calculated resistance 118.5 GOhm
at reference temperature 40°C
with ΔT for R/2 10°C
—————————————————-
DAR (1’/30”) 1.234
PI (10’/1’) 2.345
DD -.—-
Capacitance 110 nF
—————————————————-
Elapsed time Utest Resistance (after timed run test)—————————————————-
00:00:10 1020 V 35.94 GOhm
00:00:30 1020 V 42.0 GOhm
00:00:50 1020 V 43.5 Gohm
...etc...........................................
66 Megohmmeter Model 5070
Date of next test: ../../.....
Remarks:...........................
...................................
Operator: ... .....................
Signature: ........................
Step function measurement
AEMC Instruments Model 5070
Instrument number: 000 001
Company:...........................
Address:...........................
...................................
Tel.:.................
Fax:...................
Email:.................
Description:.......................
OBJECT: 01 TEST: 01 (printedonlyinMRmode)
STEP FUNCTION TEST
Date 01.31.2003
Starting time: 14h55
Running time: 00:00:50
Temperature: 23°C
Relative humidity: .... %
————————————————— Step Duration Voltage Resistance
No. h:mm def. actual
—————————————————-
1 0:10 1000 V 1020 V 2.627 GOhm
2 0:10 2000 V 2043 V 2.411 GOhm
3 0:10 3000 V 3060 V 2.347 GOhm
4 0:10 4000 V 3755 V 2.182 GOhm
5 0:10 5000 V 3237 V 2.023 GOhm
ΔR 604 GOhm
ΔV 4000 V
ΔR/(R*ΔV) (ppm/V) -57 ppm
Megohmmeter Model 5070 67
Capacitance 110 nF
—————————————————-
Elapsed time Utest Resistance
—————————————————-
00:00:10 1020 V 2.627 GOhm
00:00:30 1020 V 2.627 GOhm
00:00:50 1020 V 2.627 Gohm
…etc.……………………………………
Date of next test: ../../.....
Remarks:..........................
...................................
Operator:. ... ...................
Signature: ........................
—————————————————-
6.6 Printing Data in Memory (Print Memory)
Whenthisprintingmodeisselected,thecontentofthememoryisdisplayed.
Storedmeasurements tobeprintedareselectedusing the , , ,but-tons.
Here, the measurements selected forprintingare:13 : 5913 : 5802 : 0302 : 02
Oncetheyhavebeenselected,dooneofthefollowing:
• To start printing,pressthePRINTkeyagain.
• To exit without printing,changetherotaryswitchposition.
• To stop printing,changetherotaryswitchposition.
Theprintingofeachgroupofdataisreducedtothemainresults.
PRINT Obj. Test Date Time Fct.
47 99 12.15.2003 07:04 625V13 59 12.07.2003 22:39 3800V13 58 11.29.2003 15:47 50V02 03 11.24.2003 15:04 2150V02 02 10.29.2003 21:45 975V02 01 09.30.2003 02:43 5000V01 02 09.02.2003 15:07
68 Megohmmeter Model 5070
Dependingonthemeasurementperformed,thefollowingformatsareobtained.
Any measurement except step function measurementsAEMC Instruments Model 5070
Instrument number: 000 001
Company:...........................
Address:...........................
...................................
Tel.:..................
Fax:...................
Email:.................
Description:.......................
OBJECT: 01 TEST: 01
INSULATION RESISTANCE TEST
Date 01.31.2003
Starting time: 14h55
Running time: 00:15:30
Temperature: 23°C
Relative humidity: .... %
Test voltage: 1000 V
Insulation resistance: 385 GOhm
—————————————————-
Rc - calculated resist. 118.5 GOhm
at reference temperature 40°C
with ΔT for R/2 10°C
—————————————————-
DAR (1’/30”) 1.234
PI (10’/1’) 2.345
DD -.—-
Capacitance 110 nF
OBJECT: 01 TEST: 02
INSULATION RESISTANCE TEST
Date 01.31.2003
Starting time: 17h55
Running time: 00:17:30
Megohmmeter Model 5070 69
Temperature: 23°C
Relative humidity: .... %
Test voltage: 1000 V
Insulation resistance: 385 GOhm
—————————————————-
Rc - calculated resist. 118.5 GOhm
at reference temperature 40°C
with ΔT for R/2 10°C
—————————————————-
DAR (1’/30”) 1.234
PI (10’/1’) 2.345
DD -.—-
Capacitance 110 nF
…etc.……………………………………
Date of next test: ../../.....
Remarks:......................
...................................
Operator:. ... ...................
Signature: ........................
Step function measurement
AEMC Instruments Model 5070
Instrument number: 000 001
Company:...........................
Address:...........................
...................................
Tel.:.................
Fax:...................
Email:.................
Description:.......................
70 Megohmmeter Model 5070
OBJECT: 01 TEST: 01
STEP FUNCTION TEST
Date 01.31.2003
Starting time: 14h55
Running time: 00:00:50
Temperature: 23°C
Relative humidity: .... %
—————————————————Step Duration Voltage Resistance
N° h:mm def. actual
—————————————————-
1 0:10 1000 V 1020 V 2.627 GOhm
2 0:10 2000 V 2043 V 2.411 GOhm
3 0:10 3000 V 3060 V 2.347 GOhm
4 0:10 4000 V 3755 V 2.182 GOhm
5 0:10 5000 V 3237 V 2.023 GOhm
ΔR 604 GOhm
ΔV 4000 V
ΔR/(R*ΔV) (ppm/V) -57 ppm
Capacitance 110 nF
OBJECT: 01 TEST: 03
…etc.……………………………………
Date of next test: ../../.....
Remarks:...........................
...................................
Operator:. ... ....................
Signature: ........................
Megohmmeter Model 5070 71
CHAPTER 7
DATAVIEW® SOFTWARE
7.1 Installing DataView®
For complete information on using the Megohmmeter with DataView, refer to the Help Menu within the Megohmmeter Control Panel in DataView.
DO NOT CONNECT THE INSTRUMENT TO THE PC BEFORE INSTALL-ING THE SOFTWARE AND DRIVERS.
1. Insert theDataView thumb drive into an availableUSB port on your com-puter. IfAutorun is enabled, anAutoPlaywindowappears on your screen.Click“Openfoldertoviewfiles”todisplaytheDataViewfolder.IfAutorunisnotenabledorallowed,useWindowsExplorertolocateandopentheUSBdrivelabeled“DataView.”
2. WhentheDataViewfolderisopen,findthefileSetup.exelocatedintherootdirectoryoftheUSBdrive,anddouble-clickittoruntheinstallationprogram.
3. TheDataViewsetupscreenappears.
72 Megohmmeter Model 5070
In theupper left cornerof the screen, choose the languageversionof theSetupinterface.(AllSetupscreensanddialogswillimmediatelyappearintheselectedlanguage.)
Inthelowerleftcorneraretheavailableinstallationoptions.InadditiontotheDataViewsoftware,youcanselect“AdobeReader.”ThislinkstotheAdobewebsitewhereyoucandownloadthelatestversionofReader.ThisprogramisrequiredtoviewDataView.pdfdocuments.TheoptionFirmwareUpgradeslinksto thewebsitewhereyoucancheckfornewfirmwareupdatesfor theinstrument.Finally,UserManualsdisplaysalistof.pdffilescontainedintheUSBdrive thataccompaniesDataView. (DataViewalsocomeswithaHelpsystemthatisinstalledwiththeprogramfiles.)
ToinstallDataView,selectDataViewintheOptionslistandclickInstall.
4. SelectthelanguageversionofDataViewyouwanttoinstall(English,French,orSpanish) thenclickNext. (Bydefault, the languageselected instep3 ishighlighted.)
5. Youarenowpromptedtoselectthesoftwareyouwanttoinstall.EachAEMCproductfamilyhasitsownspeciallydesignedControlPanel.Ifyouareper-formingaCompleteinstall,bydefaultallavailableControlPanelsareselected(acheckmarknexttotheControlPanelindicatesitisselected).ControlPan-elstakeupdiskspaceonthecomputer;sounlessyouhaveothertypesofAEMC instruments,we recommend that youselectMegohmmeterandde-selecttherest.YoushouldalsochecktheoptionDataViewCore,whichisarequirementifyouplantocreateDataViewreports.
After you finish selecting and deselectingControl Panels and/orDataViewCore,clickNext.
Megohmmeter Model 5070 73
6. TheSetupprogramnowinformsyouthatitisreadytoinstallDataView.Ifyouwanttoreviewanyofyourpreviousselections,clickthePreviousbuttontoreturntoearlierscreens.Otherwise,clickInstalltobegininstallation.
7. TheInstallShieldprograminstallstheselectedsoftware.Ifanearlierversionofthesoftwareisalreadyinstalledonyourcomputer,foreachselectedpro-gramtheInstallShieldprogramwill:
(a)Askyoutoconfirmtheinstallationoftheprogram.ClickNext.
(b)Displayastatusbarindicatingtheprogressoftheinstallation.
(c)Informyouwhentheprogramisinstalled.
ClickFinishtoinstallthenextselectedprogram.
Ifthesoftwareisnotinstalled(oriftheinstalledsoftwareisthesameversionastheselectedsoftware),thesoftwareisinstalledwithoutrequestingconfirmation. Whenallprogramsare installed,amessageappears informingyouof this.ClickFinishtoreturntotheSetupscreen
8. You cannowselect additionalSetupoptions to install (see step3 above).Whenfinished,clickExit.
9. TheDataViewfoldernowappearsonyourcomputerdesktop,withinwhichistheMegohmmeter iconandtheicon(s)foranyotherControlPanel(s)youhaveinstalled.
7.2 Megohmmeter Control PanelClicking the DataView icon in the DataView folder on your desktop opens thecoreDataViewprogram.ClickingtheMegohmmeterControlPaneliconopenstheMegohmmeterControlPanel.
Ingeneral,coreDataViewfeaturesareforcreating,viewing,editing,andstoringDataViewreports;whiletheControlPanelisforconnectingto,configuring,view-ingmeasurementson,anddownloadingdatafromtheinstrument.YoucanaccessallDataViewfeaturesthrougheithertheDataViewiconortheControlPanelicon.Foruserswhointeractwithmegohmmeterinstruments,werecommendprimarilyusingtheControlPanel.However,therearesituationswhereusingthecoreData-Viewiconmaybemoreconvenientforsomeusers,suchaswhenviewingmultiplearchivedreportsfromdifferentAEMCproductfamilies.
ForfurtherinformationaboutusingtheMegohmmeterControlPanel,consulttheHelpsystemthatcomeswiththeproduct.AccessthisHelpbyclickingtheoptionHelpintheControlPanel’smenubaratthetopofthescreen.
74 Megohmmeter Model 5070
CHAPTER 8
MAINTENANCE
Useonlyfactoryspecifiedreplacementparts.AEMC®willnotbeheldresponsibleforanyaccident,incident,ormalfunctionfollowingarepairdoneotherthanbyitsservicecenterorbyanapprovedrepaircenter.
8.1 Recharging the Battery
Ifthe symbolisflashing,thebatteryneedstoberecharged.
Connect the instrument to the 120VAC power cord via the connector (chargingstartsautomaticallyeveniftheinstrumentisturnedoff).
• If the instrument is charging in the OFF position: thebatterysymbolisdisplayedandthe3barsflashthroughoutthecharging-“Chargingbat-tery”isalsoindicated.Whenthebatteryisfull,thesymbolandits3barsarelitsteadilyand“ChargingFull”isindicated.
• If the instrument is charging in a measurement position: thebatterysymbol flashes.There isno full charge indication.The “ChargingFull”indicationisdisplayedonlywhentheinstrumentisreturnedtotheOFFposition.
Iftheinstrumentisturnedonandthebatteryvoltageis>8V,thenthenormaluseofthedeviceispermitted.
The battery should be replaced by an authorized repair facility recognized by AEMC® Instruments.
WARNING: Changing the battery causes data to be lost from the memory.
PresstheMEM/MRbutton(“OFF”isdisplayed).ProceedwithatotalclearingofmemoryinSET-UP(see§4.8)sotheMEM/MRfunctionscanbeusedagain.
Megohmmeter Model 5070 75
8.2 Fuse ReplacementIfGUARD FUSEappearsonthedisplay,thefusemustbereplaced,takingallthenecessaryprecautionswhenopeninguptheinstrument.
WARNING: Make sure that none of the terminals are connected and that the selector switch is set to the OFF position before opening up the case.
Onlyusethetypeoffuseshownonlabelinsidetheunit’scover:0.1A-FastActing-380V,5x20mm,10kA(Cat. #2119.84)
8.3 Cleaning
WARNING: Disconnect the instrument from any source of electricity.
• Useasoftclothlightlydampenedwithsoapywater.Rinsewithadampclothandthendrywithadrycloth.
• Donotgetwater inside thecase.Thismay lead toelectricalshockordamagetotheinstrument.
• Donotusealcohol,solventsorhydrocarbons.
8.4 StorageIftheinstrumentisnotusedforanextendedtimeperiod(longerthantwomonths),it is recommended thatacompletechargeanddischargeof thebattery isper-formedthreetimesbeforere-usingtheinstrument.
Completebatterydischargecanbeperformed:
• Byremovingthebatteryfromtheinstrumentandapplyinga3Amploadto it.
• Onthe5000Vpositionwiththebacklighton(consumesthemostpower)
76 Megohmmeter Model 5070
APPENDIX A
UTILIZING THE GUARD TERMINAL
• Guardterminalsareusefulwhenmeasuringhighresistancevaluesandforsta-bilizingreadings.
• Surfaceleakageisfundamentallyalowresistancepathinparallelwiththemostimportantresistancepaththroughthebodyoftheinsulation.Theguardtermi-nalcanbeusedtostoptheeffectsofthesurfaceleakagefrominfluencingthemeasurementofresistancethroughtheinsulation.Intheexampleofacable,showninthediagrambelow,connectingtheguardterminaloftheModel5070tothesurfaceoftheinsulationwillredirectsurfaceleakagecurrentsawayfromthetruemeasuredvalueofleakagecurrentfromtheconductorthroughtheinsula-tion.
• The use of the guard terminal ismost important when there is a significantexposedsurfaceinacable.Whentestingtheinsulationattheendofacable,it isnecessarytoeliminatetheerrorfromsurfaceleakagewhichoccurs,par-ticularlyathighresistancevalues.Theguardterminalprovidesathirdterminalwithin the path of the surface leakage.Connect the instrument as shown inFigureA-1.
Conductorto
Line (-)Terminal
Insulationto
GuardTerminal
Shieldto
Earth (+)Terminal
ExposedSurface
The guard terminalis useful whenmeasuring veryhigh resistancevalues.
A B C Outer jacket
Figure A-1 - Shielded Cable
• Connecttheblack(-)testleadtotheconductoratA
• Connectthered(+)testleadtotheshieldlayerofthecableatC
• ConnecttheblueGuard(G)leadtotheinsulationlayerofthecableatB
Ifthereisnoshield,useacopperwirewoundseveraltimesaroundtheexposed
Megohmmeter Model 5070 77
surface.(Note:Ifashieldisnotavailableandyoudonotmakeupashieldaround“B”andconnecttotheguardterminal(-),themeasurementwillbeerroneousandleadtoconfusionastothecable’scondition).Iftheguardterminalisnotconnectedat“B”,theinstrumentmeasuresthecurrent“i”flowingthroughtheinsulationandasurfaceleakagecurrent“i1”.SeeFigureA-2.
A C
B
Ry
Rz
Rx
i1
i
To EARTHTerminal
To LINETerminal
No Connection toGuard Terminal
Figure A-2 - No Guard Terminal Connected
Withtheguardterminalconnected,thesurfaceleakagei1isremovedandhasnoeffectonthereading,SeeFigureA-3.
A C
B
Ry
Rz
Rx
i1
i
To EARTHTerminal
To LINETerminal
To GuardTerminal
Figure A-3 - Guard Terminal Connected
78 Megohmmeter Model 5070
APPENDIX B
SERIAL CABLE REQUIREMENTS
RS-232 SpecificationsTheBaudRatecanbesetto300,600,1200,2400,4800,9600,or“Parallel”(forprintingresultsonparallelprintersviatheoptionalserial-to-paralleladapter)intheSET-UPmode(see§4.1).TheDataformatis:8databits,1stopbit,noparity,Xon/Xoffprotocol.
Serial Printer ConnectionCable,PCRS-232,DB9F/F6ft(forserialprinter) .......................... Cat. #2119.46
2 23 3
5 5
9-pin female connectorto Model 5070
9-pin female connectorto serial printer
Connection to a PC or to a Parallel PrinterCable,PCRS-232,DB9F/F6ftNullModemCable ........................ Cat. #2119.45
2 2
3 3
5 5
9-pin female connectorto Model 5070
9-pin female connectorto serial printer
Megohmmeter Model 5070 79
APPENDIX C
V DISTURBANCE/V OUTPUT FEATURE
TheVDisturbance/VOutputfeature(referredtointhetextofthismanualasdlSt)servestwopurposes.Firstitactsasasafetydeviceinhibitingtheinstrumentfromgeneratingatestvoltagewhenlivesignalsarepresent.Inthesetupmode,youcanchooseapercentageofthetestvoltagethatconstitutesaconditionthatrequiresthetesttobeinhibitedbeforeitstarts.IftheModel5070mea-suresavoltagehigherthantheVDisturbance/VOutputsettingallows,notestvoltagewillbegeneratedwhentheStartbuttonispressed.Thecalculationforthisconditionissimple.Inthesetupmode,youhaveachoicetosettheratioforVDisturbance/VOutput(statedasdlSt)to3,10or20%.Theinhibitvoltageisthencalculatedbymultiplyingthispercentagetimesthetestvoltage.Example:Testvoltageissetto500andtheVDisturbance/VOutputissetto3%there-forethevoltagepresentattheinputterminalsbeforethestartofatestthatwillinhibittestingis(500)(0.03)=15volts.Thetablebelowshowstheinhibitvoltagesforthe4fixedtestvoltagepositionsandthethreeVDisturbance/VOutputpercentages.
Before Testing
Test V Disturbance/V Output Voltage 3% 10% 20%
500 15 50 1001000 30 100 2002500 75 250 5005000 150 500 1000
Ifasuddenchangeinvoltageoccursduringthetest,theformulaforcalculatingVDisturbance/VOutputisslightlydifferent.Itis(VOutput)(1.05+dlst).Using500voltsasthetestvoltageand3%asdlSt,theinhibitvoltagethatmustoccurafteratestisstartedis(500)(1.05+.03)=540volts.Thetablebelowshowstheinhibitvoltagesforthe4fixedtestvoltagepositionsandthethreeVDisturbance/VOutputpercentagesthatmustoccurafterateststarts.
During a Test
Test V Disturbance/V Output Voltage 3% 10% 20%
500 540 575 6251000 1080 1150 12502500 2700 2875 31255000 5400 5750 6250
80 Megohmmeter Model 5070
Repair and CalibrationTo ensure that your instrument meets factory specifications, we recommendthat itbescheduledbacktoourfactoryServiceCenteratone-year intervalsforrecalibration,orasrequiredbyotherstandardsorinternalprocedures.
For instrument repair and calibration:YoumustcontactourServiceCenterforaCustomerServiceAuthorizationNumber(CSA#). This will ensure that when your instrument arrives, it will be trackedandprocessedpromptly.Pleasewrite theCSA#on theoutsideof theshippingcontainer.Iftheinstrumentisreturnedforcalibration,weneedtoknowifyouwantastandardcalibration,oracalibration traceable toN.I.S.T. (Includescalibrationcertificateplusrecordedcalibrationdata).
Ship To: ChauvinArnoux®,Inc.d.b.a.AEMC®Instruments 15FaradayDrive Dover,NH03820USA Phone: (800)945-2362(Ext.360) (603)749-6434(Ext.360) Fax: (603)742-2346or(603)749-6309 E-mail: [email protected]
(Orcontactyourauthorizeddistributor)
Costs for repair, standard calibration, and calibration traceable to N.I.S.T. areavailable.
NOTE: You must obtain a CSA# before returning any instrument.
Technical and Sales Assistance
Ifyouareexperiencinganytechnicalproblems,orrequireanyassistancewiththeproperoperationorapplicationofyourinstrument,pleasecall,mail,faxore-mailourtechnicalsupportteam:
ChauvinArnoux®,Inc.d.b.a.AEMC®Instruments 200FoxboroughBoulevard Foxborough,MA02035USA Phone: (800)343-1391(Ext.351) (508)698-2115(Ext.351) Fax: (508)698-2118 E-mail: [email protected] www.aemc.com
NOTE: Do not ship Instruments to our Foxborough, MA address.
Megohmmeter Model 5070 81
Limited WarrantyTheMegohmmeterModel5070iswarrantedtotheownerforaperiodoftwoyearsfrom the date of original purchase against defects inmanufacture.This limitedwarrantyisgivenbyAEMC®Instruments,notbythedistributorfromwhomitwaspurchased.Thiswarrantyisvoidiftheunithasbeentamperedwith,abusedorifthedefectisrelatedtoservicenotperformedbyAEMC®Instruments.
Full warranty coverage and product registration is available on our website at www.aemc.com/warranty.html.
Please print the online Warranty Coverage Information for your records.
What AEMC® Instruments will do:Ifamalfunctionoccurswithinthewarrantyperiod,youmayreturntheinstrumenttousforrepair,providedwehaveyourwarrantyregistrationinformationonfileoraproofofpurchase.AEMC® Instrumentswill,at itsoption,repairorreplacethefaultymaterial.
REGISTER ONLINE AT: www.aemc.com
Warranty Repairs
What you must do to return an Instrument for Warranty Repair: First,requestaCustomerServiceAuthorizationNumber(CSA#)byphoneorbyfaxfromourServiceDepartment(seeaddressbelow),thenreturntheinstrumentalongwith thesignedCSAForm.Pleasewrite theCSA#on theoutsideof theshippingcontainer.Returntheinstrument,postageorshipmentpre-paidto:
Ship To: ChauvinArnoux®,Inc.d.b.a.AEMC®Instruments 15FaradayDrive•Dover,NH03820USA Phone: (800)945-2362(Ext.360) (603)749-6434(Ext.360) Fax: (603)742-2346or(603)749-6309 E-mail: [email protected]
Caution: To protect yourself against in-transit loss,we recommend you insureyourreturnedmaterial.
NOTE: You must obtain a CSA# before returning any instrument.
01/20
99-MAN100283v29
Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments15FaradayDrive•Dover,NH03820USA•Phone:(603)749-6434•Fax:(603)742-2346
www.aemc.com