AEMC instruments 6501 Manuale utente
MEGOHMMETER
6501
6503
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.
The recommended calibration interval for this
instrument is 12 months and begins on the date of
receipt by the customer.
Serial #: ________________________________
Catalog #: 2126.51 / 2126.52
Model #: 6501/ 6503
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
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Table of Contents
1. INTRODUCTION...................................................... 3
1.1 International Electrical Symbols...................................... 4
1.2 DenitionofMeasurementCategories............................ 4
1.3 ReceivingYourShipment................................................ 5
1.4 OrderingInformation ....................................................... 5
1.4.1 AccessoriesandReplacementParts ................. 5
2. PRODUCT FEATURES ............................................. 6
2.1 Description ......................................................................6
2.2 Features.......................................................................... 6
2.3 Model6501ControlFeatures ......................................... 8
2.4 Model6503ControlFeatures ......................................... 9
3. SPECIFICATIONS.................................................. 10
4. OPERATION .......................................................... 12
4.1 Auto-ranging .................................................................12
4.2 SafetyCheck-VoltageTest.......................................... 12
4.3 InsulationResistanceTesting(MΩRange)................... 12
4.3.1 TestVoltage...................................................... 13
4.3.2 SpotTesting...................................................... 13
4.3.3 RatioTesting..................................................... 14
4.4 SuccessfulInsulationResistanceTesting ..................... 14
4.5 UtilizationoftheGuardTerminal(Model6503) ................... 15
4.6 InsulationMeasurement-Connections ........................ 17
4.7 InsulationResistanceonMotors................................... 21
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5. MAINTENANCE..................................................... 24
5.1 Warning........................................................................24
5.2 Cleaning........................................................................ 24
5.3 FuseReplacement........................................................ 25
Limited Warranty ..........................................................................27
WarrantyRepairs..........................................................................27
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MegohmmeterModels6501/6503
3
CHAPTER 1
INTRODUCTION
Warning
Thesesafetywarningsareprovidedtoensurethesafetyof
personnelandproperoperationoftheinstrument.
• Readtheinstructionmanualcompletelyandfollowall
safetyinformationbeforeoperatingthisinstrument.
• Safetyistheresponsibilityoftheoperator!
• Testsaretobecarriedoutonlyondeadcircuits!Check
forlivecircuitsbeforemakingresistancemeasure-
ments(safetycheck).
• Thesemegohmmetersareratedfor600VCATIIor
300VCATIII-PollutionDegree2.
• TheMegohmmeterModels6501/6503aresources
ofhighvoltage,asisthesampleconnectedtothem.
Allpersonsperformingorassistinginthetestsmust
employallsafetyprecautionstopreventelectrical
shocktothemselvesandtoothers.
• AEMC
®
Instrumentsconsiderstheuseofrubbergloves
tobeanexcellentsafetypracticeeveniftheequipment
isproperlyoperatedandcorrectlygrounded.
• Whentestingcapacitancesamples,makesurethat
theyhavebeenproperlydischargedandthattheyare
safetotouch.Dielectricinsulationsamplesshouldbe
short-circuitedforatleastvetimestheamountoftime
theywereenergized.
• Usetheleadssuppliedwiththemegohmmeter.If
defectiveorused,replacebeforetesting.
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MegohmmeterModels6501/6503
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 DenitionofMeasurementCategories
CAT I: For measurements on circuits not directly connected to
theACsupplywalloutletsuchasprotectedsecondaries,
signallevel,andlimitedenergycircuits.
CAT II: For measurements performed on circuits directly
connectedtotheelectricaldistributionsystem.Examples
are measurements on household appliances or portable
tools.
CAT III: For measurements performed in the building installation
atthedistributionlevelsuchasonhardwiredequipmentin
xedinstallationandcircuitbreakers.
CAT IV: For measurements performed at the primary electrical
supply (<1000V) such as on primary overcurrent protec-
tiondevices,ripplecontrolunits,ormeters.
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5
1.3 ReceivingYourShipment
Uponreceivingyourshipment,makesurethatthecontentsarecon-
sistent with the packing list. Notify your distributor of any missing
items.Iftheequipmentappearstobedamaged,leaclaimimme-
diatelywiththecarrierandnotifyyourdistributoratonce,givinga
detailed description of any damage. Save the damaged packing
containertosubstantiateyourclaim.Donotuseaninstrumentthat
appearstobedamaged.
1.4 Ordering Information
Megohmmeter Model 6501.....................................Cat. #2126.51
Includes a soft carrying case, two color-coded leads, two insulated
alligator clips, test probe and user manual.
Megohmmeter Model 6503.....................................Cat. #2126.52
Includes a soft carrying case, three color-coded leads, three insulated
alligator clips, test probe and user manual.
1.4.1 Accessories and Replacement Parts
Replacement soft carrying case................................Cat. #2126.71
Replacement leads (black and red), alligator clips
(black and red) and one safety test probe (6501)...... Cat. #2126.72
Replacement leads (black, red and blue), alligator clips (black,
red and blue) and one safety test probe (6503).........Cat. #2126.73
Replacement Fuse - 0.2A, 600V HPC (6501) ............Cat. #2970.95
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MegohmmeterModels6501/6503
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The AEMC® Models 6501 and 6503 are compact, self-contained
hand-crankedmegohmmeters.Theyarepracticalanddependable
instruments designed for a broad range of plant and eld service
applications,suchasacceptancetestingandpreventivemaintenance
ofwiring,cables,switchgear,andmotors.Theeasyhand-cranked
operationprovidesasteadyrectiedDCvoltageoutputacrossthe
entirerangeforconsistentlyreliablereadings.
Thesemegohmmeters incorporate abuilt-ingenerator and acon-
stantDC voltage circuit toprovideastableoutput and give direct
insulationresistancereading.
TheModels 6501/6503haveaunique auto-rangingfeaturewhich
expands the scale by x10 and almost doubles the scale length.
Whenthepointerreachesneartheendofscale,theauto-ranging
featureactivates,returningthepointertothebeginningofthescale
withthex10redLEDindicatoron.
Insulation resistance is indicated with a rugged taut-band meter
movement on a logarithmic scale. The indicator scale is easy to
read.
2.2 Features
• Measuresinsulation at 500V,resistanceandcontinuity (Model
6501)
• Threetestvoltages:250V,500V,1000V(Model6503)
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MegohmmeterModels6501/6503
7
• Testvoltageconstantacrosstheentiremeasurementrange
• AutorangingMΩ,kΩandΩranges(Model6501)
• AutorangingMΩranges(Model6503)
• Designedforharshenvironments:offshore,mining,heavy-duty
eld,industrial,andmilitaryuse
• Compact,self-containedpackage;foldingcrank
• Largedirectreadingscale
• 600Vtestvoltagerange(safetycheck)
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MegohmmeterModels6501/6503
2.3 Model6501ControlFeatures
kΩ
Ω
M
V
x 10
5
0
1
2
6
7
10
V
FUS
1
2
3
4
5
10
20
10
20
30
0.5
50
(500V)
(1mA)
(5mA)
ΜΩ
2!C
42
300
0
100
200
400
500
600
Ω
κΩ
4
3
8
9
40
0
Ω
MEGOHMMETER
Model 6501
INSTRUMENTS
®
600V CAT II / 1000V CAT I !
123
4
5
6
7
8
9
Figure 2-1
1. Line(-)terminalBlack
2. Fuse0.2A
3. Earth(+)terminalRed
4. AmberLEDilluminateswhenpropercrankspeedisattained,
indicatingpresenceofselectedoutput
5. Foldawayhandle
6. Mechanicalzeroadjustmentscrew
7. Rangeswitch-safetytestrstonMΩ/Vrangeto600VAC
8. Autoranging:RedLEDilluminateswhenreadingneedstobe
multipliedx10toobtainthetruevalue(MΩ,kΩ,Ωranges)
9. Securityngerrestisolatesusershandfromterminalswhile
givingarmgripduringanoperation
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