IDEAL 61-797 User manual

1
#61-797
Digital Insulation Meter
Instruction Manual

2
Read First: Safety Information
Understand and follow operating instructions carefully. If this tester is not used
in a manner specified by IDEAL, protection provided by the product may be
impaired.
WARNINGS
To avoid possible electric shock, personal injury or death follow these
instructions:
• Donotuseifmeterappearsdamaged.
• Visuallyinspectthemetertoensurecaseisnotcrackedandbackcaseis
securely in place.
• Inspectandreplaceleadsifinsulationisdamaged,metalisexposed,or
probes are cracked. Pay particular attention to the insulation surrounding
the connector.
• Donotusemeterifitoperatesabnormallyasprotectionmaybeimpaired.
• Donotuseduringelectricalstormsorinwetweather.
• Donotusearoundexplosivegas,dust,orvapor.
• Donotapplymorethantheratedvoltagetothemeter.
• Donotusewithoutthebatteryandthebackcaseproperlyinstalled.
• Removethetestleadsfromthemeterbeforeremovingbatterycap.
• Donotattempttorepairthisunitasithasnouser-serviceableparts.
• Disconnectpoweranddischargecapacitorsbeforetestingresistance,
continuity or insulation.
• Replacebatteryassoonaslowbatteryindicatorappearstoavoid
false readings.
• Usetheproperterminals,functionandrangeforyourmeasurements.
• Usecareasthistesteroutputsahighvoltagetomeasureinsulation
resistance.
• Complywithlocalandnationalsafetyrequirements,includingtheuseof
appropriatepersonalprotectiveequipment.
To protect yourself, think “Safety First”:
• Voltagesexceeding30VACor60VDCposeashockhazardsousecaution.
• Useappropriatepersonalprotectiveequipmentsuchassafetyglasses,face
shields, insulating gloves, insulating boots, and/or insulating mats.
• Beforeeachuse:
 - Performacontinuitytestbytouchingthetestleadstogetherto
verify the functionality of the battery and test leads.
 - Usethe3PointSafetyMethod.(1)Verifymeteroperationbymeasur-
ingaknownvoltage.(2)Applymetertocircuitundertest.(3)Returnto
the known live voltage again to ensure proper operation.

3
• Nevergroundyourselfwhentakingelectricalmeasurements.
• Connecttheblackcommonleadtogroundorneutralbeforeapplyingthe
red test lead to voltage. Disconnect the red test lead from the voltage first.
• Alwaysworkwithapartner.
• Whenusingtheprobes,keepngersasfarbehindtheprobetipsas
possible.
Instrument - Description
Feature Callouts
1. LCD Display-4000count
2. Push-Buttons for features
3. Function Selector to turn the Power On or Off and to select
a function.
4. Input Terminal for Ω function.
5. Input Terminal for V insulation functions.
6. Common (Ground reference) input Terminal for all
functions.
1. Display
2. Features
Pass indicator
High Voltage
indicator
3. Function Selector
& Power On/Off
4. Ω Input
5. V Insulation Input
6. Common Input

4
WhenconnectingthetestleadstotheDUT(DeviceUnderTest)connect
thecommon(COM)testleadbeforeconnectingthelivelead;when
removing the test leads, remove the live test before removing the
common test lead.
The figures on the following pages show how to make basic
measurements.
Measuring ACV/DCV : Auto Sense Function
If the measured voltage is above 660 V ac/dc, “>660Vac/dc”
will appear on the display.
Autosensemode:ThemeterdisplaysACVorDCVwhicheverishigher
(>0.3V).
Ifthemeasuredvoltageisabove660Vac/dc,“660Vac/dc”willappearon
the display.

5
Measuring Earth-Bond Resistance
Measuring ACV/DCV: Auto sense +LPF function
PRESS
TheLowPassFilter(LPF)modewhenactivatedintheACVoltageMode
rejectsorblocksunwantedvoltageatfrequencies>than1kHZ.TheLow
Passltercangreatlyimprovemeasurementsoncomplexwaveforms
suchasadjustalespeeddrivesorvariablefrequencydrives.

6
1. Beforestartingthetest:
 (a)Thecircuitundertestmustbecompletelyde-energized.
 Checkthefusebeforetesting.
 Connectingtoanenergizedcircuitwhilethetestisactivewill
blow the fuse.
See Testing the fuse later in this manual.
 Ifthedetectedvoltageisabove2V,“>2V”willappearonthe
display.
In this condition, the test is inhibited.
(b)Shortthetestleadsbeforemeasurement,andpresstheblue
button to compensate the probe resistance for <2Ω.
2. Lockmode:PresstheLockbuttontoentertheLockMode.
Then press the TEST button to start the test. The test voltage will
 continuetobeapplieduntiltheTEST/LOCKbuttonispressedagain.
3. Themeterdisplaysthe“>”symbolandthemaximumresistancefor
 therangewhenmeasuredresistanceishigherthanthemaximum
display range.

7
Measuring Insulation Resistance
Ω
Ω
V
INSULATION
PA SS
RECALL PI/DAR
COMPARE
PI DAR
TEST
V
V
100200
500KMΩ
0
100K
10M 100M
100MK
10Gk
100Gk
AUTO LOCK APOSENSE
KMΩ
GΩ
µmA
MΩ
COMP STORE LOCK
61-797
>600V
COM
OFF
50V
V
100V 250V
500V
500V
1000V
FUSED
CAT. IV
600V
0
0
LP
L







C






AC
DC
�
AC
DC
�
MEM TEST
+–
~
Press
&
Hold
TEST
0
100K
10M 100M
100MK
10Gk
100Gk
MΩ
0
100K
10M 100M
100MK
10Gk
100Gk
V
DC
TEST
MΩ
V
DC
=
TEST
LPF
1. Beforestartingthetest:
 Thecircuitundertestmustbecompletelyde-energized.Ifthe
 voltagedetectedisabove30V,“>30V”willappearonthedisplay.
In this condition, the test is inhibited.
2. Press the blue button to display insulation resistance or Leakage
current during the test or when the test stops.
3. Lockmode:PresstheLockbuttontoentertheLockMode.Then
press TEST button to start the test. The test voltage will continue to
 beapplieduntiltheTEST/LOCKbuttonispressedagain.
4. ReleasetheTESTbuttonbeforeremovingthetestleads(toenable
 thetestertodischargecapacitivecircuits).Ifthescreendisplays
 volts,waituntilitreacheszero.
5. Themeterdisplaysthe“>”symbolandthemaximumresistance
 fortherangewhenmeasuredresistanceishigherthanthemaximum
display range.

8
Using the Compare Function
Measuring PI/DAR
1. Beforestartingtheinsulationtest:
 PresstheCOMPbuttontoselectthecomparevalueamong
 100kΩ,200kΩ, 500kΩ,1MΩ,2MΩ,5MΩ,10MΩ,20MΩ,
 50MΩ,100MΩ,200MΩand500MΩ
2. If the measured value is greater than the selected compare value, the
green Pass indicator will illuminate.
PI(PolarizationIndex)=R10-min/R1-min
DAR(DielectricAbsorptionRations)=R1-min/R30-sec
R10-min:theinsulationresistancemeasuredatthe10minutemark
after pressing the TEST button.
R1-min:theinsulationresistancemeasuredatthe1minutemarkafter
pressing the TEST button.
R30-sec:theinsulationresistancemeasuredatthe30secondmarkafter
pressing the TEST button.

9
The measured values of DAR test
DAR=R1-min/R30-sec
Whenthemeasuredresistanceishigherthanthemaximumrange,the
screenwilldisplay“Err”symbolforPI/DARvalue.
TESTbutton:Pressoncetostart/interruptthePI/DARtest.
Bluebutton:UsetodisplayandcheckthetimeleftofthePI/DARtest.
The measured values of PI test
PI=R10-min/R1-min
IfthereadingforDARisbiggerthan1.3orPIisbiggerthan2,itindicates
thattheinsulationisgood.Onmanyinstallations,thequalityofthe
insulation is so good that both the initial measured value and the
subsequentlymeasuredvalue(whenperformingthePIorDARtests),
willbethemaxiumthatthemetercanread.Dividingoneintotheother
will of course read the value of 1, which in this case may be perfectly
good. It is strongly recommended that in all cases, you contact
the manufacturer of the device under test or the appropriate
manual, to ensure that any reading meets the manufacturers
specification for determining if a part is good or bad.

10
Using the Store Function
Store/Recall button:
ThescreenwillbeashingtheMEMsymbolandthenumberofthe
storeddatatwicewhentheStore/Recallbuttonispressed.
1. Press once to store the voltage value during voltage test
2.PressoncetostorethePI/DAR,insulationorEarth-bond
resistance value when the individual test is completed.
3.Thememoryisdividedintovesegments,eachsegmenthas
 100maximumdatapoints.Themethodtostorethedataisrst
in/first out when the memory is full.
Table: The stored values of the individual test
segments
Voltage Earth-Bond
resistance
Insulation
resistance
50~1000V
DAR PI
items
1Voltage Resistance Resistance DARvalue PI value
2 Leakage
Current R30-sec R1-min
3Test voltage R1-min R10-min
Using the Recall Function
PresstheStore/Recallbutton>2sectoentertheRECALLmode.
Ifthememoryisempty,themeterwilldisplaythe“nOnE”symbol.
Search the stored value under RECALL mode
Note:PresstheStore/Recallbutton>5 sec to clear the stored data.
ThescreenwillbeashingMEMsymboland“cLr”onreadingtwice.