AEMC 5050 User manual

MEGOHMMETER 5050
5060
ENGLISH User Manual
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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.
Serial #: ________________________________
Catalog #: 2130.20 / 2130.21
Model #: 5050 / 5060
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
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Megohmmeter Models 5050/5060 1
Table of Contents
1. INTRODUCTION ................................................................................. 3
1.1 International Electrical Symbols...........................................................3
1.2 DenitionofMeasurementCategories.................................................4
1.3 ReceivingYourShipment.....................................................................4
1.4 OrderingInformation ............................................................................4
1.4.1 AccessoriesandReplacementParts......................................4
1.5 AccessoryInformation..........................................................................5
1.5.1 DataView®Software(forModel5060)........................................ 5
2. PRODUCT FEATURES......................................................................... 6
2.1 MegohmmeterFeatures.......................................................................8
2.2 DigitalFeatures....................................................................................9
2.3 Bargraph ............................................................................................10
2.4 Symbols .............................................................................................10
2.5 Push-buttonFunctions .......................................................................11
2.5.1 2ndButton .............................................................................11
2.5.2 V-TIMEButton.......................................................................11
2.5.3 R-DAR-PI-DD/R(t)Button ...................................................12
2.5.4 ALARMButton ......................................................................16
2.5.5 SmoothButton ......................................................................17
2.5.6 UP/DOWNButton .................................................................17
2.5.7 SET-UPFunction ..................................................................18
2.5.8 ClearingtheMemory.............................................................20
2.5.9 CommunicationRate(RS-232).............................................20
2.5.10 DefaultDeviceConguration ................................................20
2.5.11 VoltageDisturbanceLimit .....................................................21
2.5.12 AutomaticMeasuringRange.................................................21
2.5.13 Blocking(Disabling)TestVoltages........................................22
3. SPECIFICATIONS............................................................................. 23
3.1 ReferenceConditions.........................................................................23
3.2 Voltage ...............................................................................................23
3.3 InsulationResistance.........................................................................23
3.4 PowerSupply.....................................................................................28
3.5 EnvironmentalSpecications.............................................................29
3.6 MechanicalSpecications..................................................................29
3.7 SafetySpecications..........................................................................29
3.8 VariationsinOperatingRange ...........................................................30
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2 Megohmmeter Models 5050/5060
4. MEASUREMENT FUNCTIONS ........................................................... 31
4.1 AC/DCVoltage...................................................................................31
4.2 InsulationMeasurement.....................................................................31
5. OPERATION..................................................................................... 33
5.1 MeasurementProcedure....................................................................33
5.2 InsulationMeasurement.....................................................................33
5.3 OperationExamples...........................................................................34
5.4 CapacitanceMeasurement ................................................................35
5.5 ResidualandLeakageCurrentMeasurement ...................................35
6. MEMORY / RS-232 (5060).............................................................. 36
6.1 RS-232Specications........................................................................36
6.2 Saving/RecallingValues(MEM/MRButton).....................................36
6.3 PrintingMeasuredValues ..................................................................38
6.4 InstantaneousPrintingofMeasurements(PRINTbutton) ................39
6.5 PrintingDatainMemory(PRINTMEMbutton) ..................................40
7. DATAVIEW®SOFTWARE................................................................... 42
7.1 InstallingDataView®...........................................................................42
7.2 ConnectingtheModel5060toyourComputer ..................................46
7.3 UsingDataView®................................................................................46
7.3.1 ConguringtheInstrument....................................................47
7.3.2 RunningtheTest ...................................................................49
7.4 DataView®MegohmmeterTemplates.................................................52
7.4.1 MegohmmeterSummaryReportTemplate ...........................52
8. MAINTENANCE................................................................................ 54
8.1 RechargingtheBattery ......................................................................54
8.2 FuseReplacement.............................................................................55
8.3 Cleaning.............................................................................................55
8.4 Storage...............................................................................................55
LimitedWarranty .........................................................................................57
WarrantyRepairs ........................................................................................57
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Megohmmeter Models 5050/5060 3
CHAPTER 1
INTRODUCTION
WARNING
Thesesafetywarningsareprovidedtoensurethesafetyofpersonneland
properoperationoftheinstrument.
• Donotattempttoperformanytestswiththeseinstrumentsuntilyouhave
readtheinstructionmanual.
• Safetyistheresponsibilityoftheoperator!
• Testsaretobecarriedoutonlyonnon-energizedcircuits!Checkforlive
circuitsbeforemakingresistancemeasurements(safetycheck).
• Highvoltageispresent,asisthesampleconnectedtoit.Anyone
performingorassistingintestingmustfollowallsafetyprecautionsto
preventelectricalshocktothemselvesandtoothers.
• AEMC®considerstheuseofrubberglovestobeanexcellentsafety
practice,eveniftheequipmentisproperlyoperatedandcorrectlygrounded.
• Whentestingsampleswithacapacitivecomponent,makesuretheyhave
beenproperlydischargedandaresafetotouch.Dielectricinsulation
samplesshouldbeshort-circuitedforatleastvetimestheamountoftime
theywereenergized.
• Megohmmetersshouldneverbeusedinanexplosiveenvironment.
• Onlyusetheleadsthataresuppliedwiththemegohmmeter.Iftheyare
defectiveorworn,replacebeforetesting.
• Thisinstrumentcanbeusedoninstallationsratedfor1000V,CategoryIII,
or2500V,CategoryI.
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
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4 Megohmmeter Models 5050/5060
1.2 Definition of Measurement Categories
CAT II: For measurements performed on circuits directly connected to the
electricaldistributionsystem.Examplesaremeasurementsonhousehold
appliancesorportabletools.
CAT III: Formeasurementsperformedinthebuildinginstallationatthedistribution
level such as on hardwired equipment in xed installation and circuit
breakers.
CAT IV: Formeasurementsperformedattheprimaryelectricalsupply(<1000V)
suchasonprimaryovercurrentprotectiondevices,ripplecontrolunits,
or meters.
1.3 Receiving Your Shipment
• Matchthecontentswiththeorderinginformation.
• Notifyyourdistributorofanymissingitems.
• Iftheequipmentappearstobedamaged,leaclaimimmediatelywiththe
carrierandnotifyyourdistributoratonce.
NOTE: Charge the instrument fully before use.
1.4 Ordering Information
Megohmmeter Model 5050.............................................................Cat. #2130.20
Includes extra large classic tool bag, set of three 10 ft (5kV) leads (red/black/blue) with
integral 5000V rated hippo clips, one guard terminal jumper lead, US 115V power cord,
rechargeable battery pack, and user manual.
Megohmmeter Model 5060.............................................................Cat. #2130.21
Includes extra large tool bag, set of three 10 ft (5kV) leads (red/black/blue) with integral
5000V rated hippo clips, one guard terminal jumper lead, RS-232 DB9 F/F 6 ft null modem
cable, RS-232 to USB adapter, US power cord, rechargeable battery pack, and a USB stick
with DataView®software and user manual.
1.4.1 Accessories and Replacement Parts
Cable,PCRS-232,DB9F/F6ftNullModemCable(5060)............. Cat. #2119.45
Setof3,Color-coded10ftSafetyLeads(5000V),3Color-coded
AlligatorClips(600VCATIV) ........................................................... Cat. #2119.76
Lead–Replacement1ftjumperlead............................................... Cat. #2119.78
Fuse,Setof5,0.1A,380V,5x20,.10kA......................................... Cat. #2119.84
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Megohmmeter Models 5050/5060 5
ReplacementLead–Setof3,Color-coded10ft(5kV)Safety
withIntegralHippoClips(JUMPER LEAD INCLUDED)............................. Cat. #2119.85
Lead–Setof3,Color-coded25ft(5kV)Safetywith
IntegralHippoClips(JUMPER LEAD NOT INCLUDED) ............................. Cat. #2119.86
Lead–Setof3,Color-coded45ft(5kV)Safetywith
IntegralHippoClips(JUMPER LEAD NOT INCLUDED) ............................. Cat. #2119.87
ExtraLargeClassicToolBag ...........................................................Cat. #2133.73
Inverter – 12VDCto120VAC200WattforVehicleuse......................Cat. #2135.43
Battery–Rechargeable9.6V ...........................................................Cat. #2960.21
US115VPowerCord .......................................................................Cat. #5000.14
Adapter–RS-232toUSB2.0(5060)...............................................Cat. #5000.60
1.5 Accessory Information
1.5.1 DataView®Software (for Model 5060)
Dataview®softwaremakesitpossibleto:
• Retrievedatafrommemoryandplotgraphsofthechangesininsulation
asafunctionofthetimeoverwhichthetestvoltageisapplied,R(t).
• Printoutprotocolsofpersonalizedtests,dependingontheuser’sneeds.
• Createtextlesforuseonspreadsheets.
• SetupandcontroltheinstrumententirelybytheRS-232.
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6 Megohmmeter Models 5050/5060
CHAPTER 2
PRODUCT FEATURES
TheMegohmmeter Models 5050 and 5060are portable instruments, housed in
ruggedcasing.
Thesemegohmmetersaredesignedtocheckthesafetyofelectricalinstallations
andequipment.
Measures:
• Voltage
• InsulationResistance
• Capacitance
• LeakageCurrent
Advantages:
• Automatic voltage detection in all functions, before or during the mea-
surement,whichinhibitsorstopsthemeasurement.
• AutomaticdetectionofexternalACorDCvoltagesontheterminals
• Thresholdprogrammingineachfunction,triggeringaudiblealarms
• Timedcontrolofmeasurementduration
• Fuseprotection,withdefectivefusedetectionandindication
• Digitallteringofinsulationmeasurements
• Automaticdischargeofresidualhighvoltageonthetesteddevice
• Automaticshut-o󰀨tosavethebatteries
• Battery level indicator
• Largeeasy-to-readback-litLCD
Additional Features (Model 5060):
• 128kBmemory,real-timeclockandserialinterface
• ControlandprogrammingoftheinstrumentfromaPC
 (withDataView®software)
• Printingwithaserialprinter
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Megohmmeter Models 5050/5060 7
MODEL 5050
( )
FF 0.1A
380V - 10kA
5x20mm
110 - 230V
50/60 Hz
20 VA max
CALIBRATION
2
nd
SMOOTHALARM
R(t)
MEGOHMMETER
MODEL 5050
R-DAR-PI-DD
V/TIME
START/STOP
1000V CAT III
2500V
G
OFF
MΩ-1000V
MΩ- 2500V
MΩ- 5000V
MΩ 50-5000V
SET-UP
MΩ- 500V
1
6
7
5
32 4
MODEL 5060
( )
FF 0.1A
380V - 10kA
5x20mm
110 - 230V
50/60 Hz
20 VA max
RS-232
2
nd
SMOOTH ALARM
R(t)PRINT MEMMR
MEGOHMMETER
MODEL 5060
R-DAR-PI-DDPRINTMEM
V/TIME
START/STOP
1000V CAT III
2500V
G
OFF
MΩ-1000V
MΩ- 2500V
MΩ- 5000V
MΩ 50-5000V
SET-UP
MΩ- 500V
1
6
7
5
32 4
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8 Megohmmeter Models 5050/5060
2.1 Megohmmeter Features
1. Safetyterminals:“+”,“G”and“-”andaccesstotheprotectivefuse.
2. ACpowerplug(directoperationonACandbatteryrecharge).
3. Back-litliquidcrystaldisplay.
4. RS-232serialinterfacemaleplug(9-pin)
• Forcalibrationonly(Model5050)
• ForconnectiontoaPCorprinter(Model5060)
5. Rotaryselectorswitchwith7positions:
• OFF-Instrumentiso󰀨
• MΩ- 500V-Insulationmeasurement(to2TΩ)
• MΩ- 1000V-Insulationmeasurement(to4TΩ)
• MΩ- 2500V-Insulationmeasurement(to10TΩ)
• MΩ- 5000V-Insulationmeasurement(to10TΩ)
• MΩ- 50V-5000V-Insulationmeasurementwithselectabletestvoltage
• SET-UP-Set-upofthemegohmmeter
6. START/STOPbutton
7. 6buttons(5050)or8buttons(5060),eachwitharstandsecondfunction.
Thesecondfunctionsarehighlightedinyellowbeloweachbutton:
• 2nd (yellow button)-Selectsthesecondfunctiononeachbutton.
• R-DAR-PI-DD - Lets you choose the type of measurement to be per-
formed. Instantaneous Resistance (R), Dielectric Absorption (DAR),
PolarizationIndex(PI),orDielectricDischarge(DD).
• R(t)-Shows/hidestheintervalvaluesofinsulationresistance,testvolt-
ageandtime-stamping,followingatime-controlledtest.
• V/TIME-When measuringinsulation,pressingthisbutton displaysthe
time elapsed since the beginning of the measurement, then the exact
voltagegenerated.Whenperformingresistanceorcapacitancemeasure-
ment,thisbuttonhasnoe󰀨ect.InMR(memoryrecall),itdisplaysthedate
andtimeatwhichthemeasurementwasstored,theexacttestvoltage
andtheOBJ:TESTnumber.
•-Activatesordeactivatesthe“time-controlled”testmode.
• -TurnsthedisplaybacklightONorOFF.
• ALARM- ActivatesordeactivatesthealarmsprogrammedinSET-UP.
•-Selectsaparametertobemodied.
• SMOOTH-Stops/startssmoothingofdisplayedvaluesduringinsulation
testing.
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Megohmmeter Models 5050/5060 9
•  -Increasestheashingparameterbeingdisplayed.Tomoveaboutthe
listofintervalinsulationmeasurements,intheR(t)function.
•  -Decreasestheashingparameterbeingdisplayed.Tomoveabout
thelistofintervalinsulationmeasurementsintheR(t)function.
 Iftheand buttonsarehelddown,themovementbetweenparam-
etersisincreasedtoafasterrate.
Model 5060 only:
• MEM-Savesmeasuredvalues
• MR-Recallssaveddata
• PRINT-Printsmeasurementresults
• PRINT MEM-Printsmemorycontents
2.2 Digital Features
8.8.8.8
0
.
1
M
1
M
1
0
M
1
0
0
M
1
G
1
0
G
1
0
0
G
1
T
µA nA µF
COM
P
GΩ
PI
DARDD
ALARM
TΩ
MΩkΩ
MEM MR
SMOOTH REMOTE
OBJ.
min sec
TEST
V
DC
AC
2nd
8.8.8.8
Main Display
Indicatesthevalueof:
• Insulationmeasurement(resistance,DARandPI,DD,capacitance).
Small Display
Indicates:
• Voltagemeasuredorappliedbytheinstrument.
• Elapsedtimeortheoutputvoltage,duringinsulationmeasurement.
Afterrecordingasetofdata(5060),thesmalldisplayalsoindicatesthetimeand
dateinMR(memoryrecall)mode,andthememoryaddresswiththeOBJ:TEST
number.
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10 Megohmmeter Models 5050/5060
2.3 Bargraph
• Activeduringinsulationmeasurement(0.1MΩto 1TΩ).
• Indicatesthebatterychargeatstart-up.
• Indicatesfreememoryspace-onesegmentrepresentingapproximately
100groupsofsavedvalues,witheachgroupholdingapproximately50
recordings(1OBJand1TEST).
2.4 Symbols
MEM/MR:Memoryaddress(5060)-indicatesthememoryoperation.
OBJ:TEST: Memoryaddress(5060)-thenumberisdisplayedonthesmalldigital
display.
COM:Flashesonthescreenwhendataistransmittedtotheserialinterface(5060)
orremainspermanentlydisplayedifthereisaproblemduringtransfer.
DAR/PI/DD: Indicates the mode chosen before insulation measurement or the
resultsofthesemeasurements.
Dangerousvoltagegenerated;V>120V.
Externalvoltagepresent,symbolisactivatedafterpressingSTART,ifV
>25VAC±3Vor>35VDC.
Activationof“time-controlledtest”modeorclockadjustmentwhenin
SET-UP(5060).
(Yellowbutton)Selectsthesecond(bottom)functionofabutton.
Flashesifthebatteryvoltageislow,indicatingthatthebatteryshould
berecharged(see§8.1).Thevoltageisdisplayedonthesmalldisplay
for 2 seconds when the instrument is turned on. The main display
indicates“bat”whenthetestiscarriedon.
Warningbuzzerisactivated.
Indicatesthattheautomaticswitch-o󰀨functionhasbeendeactivated.
SMOOTH:Smoothstheinsulationmeasurementsdisplayed.
REMOTE: Remotecontrolviaaninterface(5060).Inthismode,allthebuttons
andtherotaryswitchontheinstrumentarenon-functional,exceptfor
theOFFposition.
FUSE -G-: Flashesifthe“G”inputfuseisdefective.
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Megohmmeter Models 5050/5060 11
2.5 Push-button Functions
2.5.1 2nd Button
• Selectsthesecondfunction(highlightedinyellow)onthebuttons.
• The symbol appears. This symbol disappears upon pressing the
functionbuttonchosen,exceptifthebuttonisactivated.Inthiscase,it
onlydisappearswhenthe buttonispressedagain,orifotherfunction
buttonsarepressed.Thisallowsyoutorapidlydecreaseparameterswith
thebutton,withouthavingtopressthe buttoneverytime.
2.5.2 V-TIME / Button
First Function - V/TIME
Displaysallthesecondaryinformationavailableonthesmalldisplay.
For Insulation Measurement:
• Thetimeelapsedsincethestartofthemeasurement.
• Thevoltagebetweentheinstrument’s“+”and“–”terminals.
• Date,time,testvoltageandOBJ:TESTnumberinmemoryrecallmode
(MR).
Second Function - Time-controlled Test
DisplaysthemeasurementdurationprogrammedinSET-UPonthesmalldisplay.
• The symbollightsup.
• PressingtheSTARTbuttonbeginsthemeasurementprocess.Themea-
surementdurationissetto15minutesbydefault.
• Assoonasthemeasurementstarts,thesmalldisplaycountsdownthe
remainingdurationofthemeasurement.Onceitreacheszero,themea-
surementstops.
• As the time-controlled test is carried out, interval samples (resistance/
voltagevaluesasafunctionoftime)areautomaticallysaved.Thetime
betweeneachsampleissetto30sbydefault,butitcanbechangedin
theSET-UPmenu.
• ThesamplesaredisplayedwiththeR(t)function(see§2.5.3)aslongas
anewmeasurementhasnotbeenstarted.Witheachnewmeasurement,
the previous sample value is erased from the memory. These sample
values are saved with the last value of the resistance if used with the
MEM (memorystorage)function.
NOTE: If the selector switch’s position is altered, or if the STOP button is pressed
during measurement, the measurement is interrupted.
This function is only active for insulation measurement.
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12 Megohmmeter Models 5050/5060
2.5.3 R-DAR-PI-DD / R(t) Button
First Function - R-DAR-PI-DD
TheR-DAR-PI-DDbuttonallowsautomaticmeasurementof:
• DielectricAbsorptionRatio(DAR)
• PolarizationIndex(PI)
• DielectricDischargeTest(DD)
ThePIandDARvaluesareusefulonlongcables,orwhenmonitoringtheagingof
insulationonelectricalmachines.
Onthismaterial,measurementisadverselya󰀨ectedatthebeginning,duetointer-
fering currents (from capacitive charges, dielectric absorption) which eventually
canceleachotherout.Therefore,inordertogetanaccuratemeasurementofthe
leakagecurrent,itisnecessarytocarryoutthemeasurementoveralongperiod
oftime,toreducetheinuenceofanyinterferingcurrentsatthebeginningofthe
measurement.
ThenthePIortheDAR ratiosarecalculated:
PI*=R10min/R1 min(2valuesrecordedduringa10minutemeasurement)
DAR=R1 min/R30s(2valuesrecordedduringa1minutemeasurement)
Thequalityofinsulationdependsontheresultsfound.
DAR PI State of the insulation
< 1.25 < 1 Inadequate, even dangerous
< 2
< 1.6 > 2 to < 4 Good
> 1.6 > 4 Excellent
*The 10 and 1 minute times can be modied in the SET-UP menu, to adapt to any changes or specic
applications.
Formulti-layerinsulation,ifoneofthelayersisdefective,butalltheothersshow
strongresistance,thecalculationofthePIandPARratiosisnotsu󰀩cienttoshow
thistypeofproblem.
Therefore,itisnecessarytosupplementthePIandDARindicationsbyadielectric
dischargetest(DD).
Thistestmeasuresthedielectricabsorptionofheterogeneousormulti-layerinsu-
lationwhileignoringtheparallel-surfaceleakcurrents.
Itconsistsofapplyingatestvoltageforaperiodsu󰀩cienttoelectrically“charge”
theinsulationtobemeasured(atypicalvalueistheapplicationofa500Vvoltage
for30minutes).
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Megohmmeter Models 5050/5060 13
Thetestvoltageischoseninthesamewayastheinsulationmeasurementinthe
SET-UPmenu.Thedevicethencausesafastdischargeduringwhichtheinsula-
tioncapacityismeasured, thenmeasured1minuteafterthe residual currentis
circulatingintheinsulation.
TheDDvalueiscalculatedfromtheformulabelow:
DD= currentmeasuredafter1minute(mA)
  testvoltage(V)xcapacitymeasured(F)
Theindicationoftheinsulationqualityasafunctionoftheresultingvalueisas
follows:
DD value Insulation quality
DD >7 Very bad
7 >DD >4 Bad
4 >DD >2 Doubtful
DD <2 Good insulation
NOTE: The dielectric discharge test is suited for the insulation measurement of
rotating machines, and in general, for the insulation measurement of heteroge-
neous or multilayer insulation containing organic materials.
Using the R-DAR-PI-DD Function:
Duringoraftermeasurement,theR-DAR-PI-DD buttonallowsyoutoscrollthrough
thefollowingvalues:
• DAR(formeasurementslasting>1min)
• PI(formeasurementslasting>theprogrammedPItimes)
• DDcanonlybecalculated1minuteaftertheendoftheinsulationmea-
surementandcircuitdischarge,andonlyifitwasselectedbeforebegin-
ningthemeasurement.
• CapacitanceinµF(onlyafterthemeasurementhasstoppedandthecir-
cuithasbeendischarged)
• ResidualleakagecurrentcirculatingintheinstallationinµAornA
• InsulationresistanceinMΩ,GΩor TΩ
NOTE: During the measurement, the DAR value is not available if the DD value
was preselected before the measurement. The PI value is not available if DAR or
DD values were preselected before the measurement.
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14 Megohmmeter Models 5050/5060
Automatic Measurement of DAR or PI:
IftheR-DAR-PI-DDbuttonispressedduringthevoltagemeasurementbeforethe
startofameasurement,thefollowingisdisplayed:
MΩ DAR PI DD
NOTE: The input current may be a depolarization current resulting from an earlier
insulation measurement. It is recommended to start a new DAR and PI measure-
ment after the current has dropped to a negligible value (on the order of 100pA)
to avoid variations on these measurements.
Dependingonthechoices(DARorPI),themeasurementgoesasfollows:
a) DAR: PressSTART-theDARsymbolashesandthedisplayindicates“----”
aslongasthecalculationoftheratioisnotpossible(t<1mn).
e.g.:
DAR
After1min,themeasurementstopsandthemaindisplayautomaticallyshowsthe
DARvalue.Duringoraftermeasurement,theR-DAR-PI-DDbuttoncanbeusedto
seetheinsulationmeasurementcarriedout,butitdoesnotgivethePIvaluesince
themeasurementhasnotlastedlongenough.
b) PI:PressSTART-thePI symbolashesandthedisplayindicates“----”as
longasthecalculationoftheratioisnotpossible(t<programmedPItimes).
e.g.:
PI
AftertheupperPItimehaspassed,themeasurementstopsandthemaindisplay
automatically shows the PI value. During and after measurement, the R-DAR-
PI-DDbuttonmakesitpossibletodisplaytheDAR(after1min),thePIandthe
insulationmeasurement.
c) DD:PressSTART-theDD symbolashesandthedisplayindicates“----”
aslongasthecalculationoftheratioisnotpossible(t<30min+1min).
e.g.:
DD
1minuteafterthemeasurementstops,theDDsymbolbecomessteady,thedis-
playautomaticallyshowthevalueofDD.
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Megohmmeter Models 5050/5060 15
Therefore: ifthemeasurementlasts1min.-DAR
 ifthemeasurementlastslongerthantheprogrammedPItime-PI
 if1min.aftertheendofthemeasurement-DD
NOTE: If during DAR or PI measurement (automatic or not), a high external inter-
ference voltage becomes present, or the insulation resistance goes beyond the
device’s measurement range, then the DAR or PI measurements are interrupted
and the screen indicates:
DAR or MΩPI MΩor DD MΩ
ThedisplayoftheDDvalueis:
• Unknown(----)ifC<1nFandIdd<100pA
• Knownandashingif1nF≤C<10nFand100pA≤Idd<1nA
• KnownandpermanentifC≥10nFandIdd≥1nA
(withC=measuredcapacitanceandIdd=measuredleakagecurrent)
NOTE: The 10 min / 1 min measurement durations for PI calculation can be
modified in the SET-UP menu (see § 2.5.7), allowing changes to standards or
to suit a particular application.
Second Function - R(t)
Usedtoaccesstheintervalinsulationresistancevaluesasafunctionoftimeafter
ameasurementin“time-controlledtest”mode(see§2.5.2).
ThetimebetweeneachsavedsampleisprogrammedintheSET-UPmenu.
ThisfunctionisalsoavailableontheModel5050,whichhasneitheraread-write
memory for saving measured data, nor an interface for data retrieval from the
instrumentbyaPC.
Model 5050:
Upto20samplescanberecordedduringmeasurementatthesampleratechosen
in SET-UP(thedefaultvalueis30seconds).Itispossibletosavemorethan20
samplesdependingonavailablememory.
Model 5060:
Thenumberofsamplesthatcanbesavedisonlylimitedbythememoryspace
available.
Toenterthedisplaymode,presstheR(t)button:
• Thesmalldisplayindicatesthetime00:30(e.g.thesamplingfrequencyis
every30s).
• ThemaindisplayshowsthecorrespondingRvalue.
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16 Megohmmeter Models 5050/5060
UsetheV/TIMEbuttontoalternatebetweenthevoltageandtime(onthesmall
display),associatedwiththeRvalueonthemaindisplay.
The button is used to scroll down through the all the samples saved during
measurement,allowingyoutoreadtheinformationinordertodrawR(t)andV(t)
graphs.
ThismakesitpossibletocarryoutR(t)analysison-site,withoutaprinteroraPC.
Toexitthisfunction,presstheR(t) or R-DAR-PI-DDbuttonagain.
2.5.4 / ALARM Button
First Function -
Turnsthedisplayback-lightON or OFF.
Second Function - ALARM
Activates/deactivates the ALARM function. The “ALARM” symbol is displayed
whenactivated.
Ifactivated,andthehighorlowthresholdvaluesareprogrammed,the“ALARM”
symbolashesandthebuzzer(ifactivated)soundscontinuouslywhenthethresh-
old is crossed.
Itispossibletoprogramadi󰀨erentlimitineachfunction.Theselimitswillbestored
inmemoryevenafterthedeviceisturnedo󰀨.
ACTIVATING THE ALARM INDICATION BEFORE A TEST
ToactivatetheAlarmIndicationbeforeperformingatestyoumustgothroughthe
followingsteps:
• ProgramtheAlarmSetPointResistanceValuefortheTestVoltageyou
willbeusing.
• TurntheRotaryswitchtotheSetupposition.
• PresstheYellow2ndbuttonandthentheAlarmbuttontosetAlarms.The
rsttimeyoupress2nd&Alarmyouwillseethealarmsettingfor50volt
tests.
• Press2nd&Alarmbuttonsrepeatedlyuntilyouseethetestyouwishtoset
alarmsforinthetoplineofthedisplay.Thesequencingwillbe500,1000,
2500,5000,andset.
• UsethecursorkeystoadjusttheBlinkingvalue.FirstselectKΩ, MΩ, GΩ
or TΩusingtheUpArrowKey().
• Next,presstheRightArrowKey()tomovetothenextselectionwhich
isthegreaterthan(>)/lessthan(<)choice.UsetheUpArrowKeyto
makeyourselection.
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Megohmmeter Models 5050/5060 17
• PresstheRightArrowKeyagainto movetotheResistance ValueSet
Point Selection. You can change this value digit by digit using the Up
Arrow/LeftArrowcombinationworkingfromthehighesttolowestdigit.
• Whennishedprogrammingthealarmsettings,placetherotaryswitchto
thedesiredtestfunction.
• Beforeinitiatingatest,presstheYellow2ndbuttonandtheAlarmbutton
toactivatetheAlarmNotication.Theword“ALARM”willappearinthe
lowerleftsideofthedisplay.
• Next,presstheroundyellowStart/Stopbuttontobeginthetest.TheAlarm
symbolwillashandthebuzzerwillsoundcontinuouslyiftheAlarmset
pointistripped.
NOTE: If the rotary switch is turned off prior to the next test, the alarm notification
will be deactivated. You will need to press the Yellow 2nd button and the Alarm
button to activate the Alarm Notification when you turn the unit back on before
starting the next test, if alarm notification is desired.
2.5.5 / Smooth Button
First Function -
Selectsthedesiredparametertobemodied-theselectedparameterashes.
Theashingparameterismodiedusingthe button(see§2.5.6).
Second Function - SMOOTH
Activatesadigitallterforinsulationmeasurement. It only has an e󰀨ect on the
displayedvalues(whicharesmoothed)andnottheactualmeasurements.
Forexample,thisfunctionisusefulwhenthedisplayedinsulationvaluesarehighly
unstable,broughtaboutduetoacapacitivecomponentinthetestedelement.
2.5.6 Button
Changestheashingparametersdisplayed,orviewsR(t)values(see§2.5.3).
Asageneralrule,twogures(day,month,hour,min.,sec.,andOBJ:TEST)ash.
Theand functionshavea“follow-on”mode.(e.g.assoonasthehighorlow
programlimitisreached,theparametertobemodiedswitchesautomaticallyto
thefollowingloworhighlimit.)
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18 Megohmmeter Models 5050/5060
First Function 
• Pressbuttonbrieytoincreasethedisplayednumberslowly.
• Pressbuttonforalongertimetoincreaseatafasterrate.
Second Function 
• Pressbuttonbrieytodecreasethedisplayednumberslowly.
• Pressbuttonforalongertimetodecreaseatafasterrate.
Unlikeallthesecondfunctionsofotherbuttons,itisnotnecessarytopressthe
buttoneachtimetogettothefunction.The symbolremainsdisplayed
andisvalidforthefunction(only),aslongastheuserdoesnotdeactivateitby
pressing oranotherbutton.
2.5.7 SET-UP Function
Congurestheinstrument.
AfterselectingSET-UPwiththerotaryselectorswitch:
• Allthedisplaysegmentsarelitupfor1second.
• Thesoftwareversionnumberisthendisplayed.
• TheinstrumentIDnumberisdisplayednext.
• “PUSH” appears on the small display and “btn” on the main display,
promptingtheoperatortopressabutton.
The SET-UP function is used to directly access the parameters to be pro-
grammed, by pressing the corresponding button.
• After having pressed a button, the corresponding gures or symbols
appearonthescreen.
• Theguresorthesymbolsthatcanbemodied,ashonthescreen.
• Usethe and buttons.
• Alltheparametersareimmediatelyandpermanentlysaved.
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