Kusam-meco KM 877 User manual

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?Paper-White
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?Dual Digital
?PI & DAR Function.
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VFD V & Hz readings.
Record MAX / MIN readings.
Display Hold Function.
Display.
Autoranging.
Backlight LCD Display
GENERAL SPECIFICATIONS :
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Sensing : AC, True RMS
Display : 3-5/6 digits 6000 Counts Backlight LCD Display.
61 Segments Analog Bar Graph : 60 per second max.
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Auto or Manual-ranging mode.
Auto Power Off.
Polarity : Automatic
Update Rate : 5 per second nominal
Power Supply: Four Alkaline AA batteries
+Hz +Hz
Power Consumption: 4.5mA typical except : ACV & VFD ACV : 7.0mA
Earth Continuity Test : 110mA @20Wrange, 220mA @2.0Wrange.
Tester can perform at least 3000 Earth Continuity Test measurements with new alkaline batteries at
room temperature. These are standard test of 1Wwith a duty cycle of 5 seconds on & 25 seconds off.
Insulation Resistance @ 1mA Test Current :
50V output Voltage : 25mA, 100V output Voltage : 45mA
250V output Voltage : 85mA, 500V output Voltage : 170mA
1000V output Voltage : 440mA
Tester can perform at least 950 Insulation Tests with new alkaline batteries at room temperature.
These are standard tests of 1000V into 1MWwith a duty cycle of 5 seconds on and 25 seconds off.
Operating Temperature : -10ºC ~ 40ºC
Relative Humidity : Maximum relative humidity 90% for temperature
up to 28ºC decreasing linearly to 50% relative humidity at 40ºC.
Pollution degree : 2
P Rating : IP40
Storage Temperature : -20ºC ~ 60ºC, < 80% R.H. (with battery removed)
Altitude : Operating below 2000m
Temperature Coefficient : Nominal 0.15 x (specified accuracy)/ °C @(-10ºC~18ºC or 28ºC~40ºC),
or otherwise specified.
Low Battery: approx. 4.6V
APO Timing: Idle for 20 minutes
APO Consumption: 50mA typical
Dimension: 208(L) X 103(W) X 64.5(H) mm with holster
Weight: 635 gm with holster.
TRUE RMS DIGITAL INSULATION MULTIMETER
MODEL KM 877
Preliminary Data
D:/Chhaya/My Documents/Chhaya/backup/catlogs/NEW CAT/2013-2014/KM 877.cdr
An ISO 9001:2008 Company
®®
SPECIAL FEATURES :
All Specifications are subject to change without prior notice
?Pass /Fail Insulation Resistance Compare function;
12 selectable Preset Values.
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LOCK-Test mode for Insulation Resistance &
Earth Continuity Test.
BeepJack audible & visible input warning.
Remote Probe for insulation Resistance &
Earth Continuity Test.
TM
SAFETY :
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Safety : Double insulation per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0,
IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2
No. 61010-1-12 Ed. 3.0 to CAT III 1000 V AC & DC and CAT IV 600V AC & DC.
Compliance to IEC/EN61557; 2007 (per CE requirements, not certified by UL or ETL) : IEC/EN61557-1, IEC/EN61557-2 & IEC/EN61557-4 where applicable.
E.M.C. : Meets EN61326-1:2006 (EN55022, EN61000-3-2, EN61000-3-3, EN61000-4-2, EN61000-4-3,
EN61000-4-4, EN61000-4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11)
In an RF field of 3V/m:
Total Accuracy = Specified Accuracy + 25 digits.
Performance above 3V/m is not specified.
Overload Protections :
Earth Continuity Test : 0.25A/1KV, IR 30kA or better
V : 1100Vrms
mV, W& Others : 1000 Vrms
Transient Protection : 8KV(1.2/50mS Surge)
ACCESSORIES :
ACCESSORIES :
Test probe pair, BRP21S2-C Remote probe, Alligator clip pair, Holster, User manual & Carrying Case.
OPTIONAL Magnetic hanger.
NEW
23 Functions 73 Ranges

D:/Chhaya/My Documents/Chhaya/backup/catlogs/NEW CAT/2013-2014/KM 877.cdr
ELECTRICAL SPECIFICATIONS : KM 877
o o
Accuracy is ± (% of reading digits + number of digits) or otherwise specified, at 23 C ± 5 C & less than 80%relative humidity.
True RMS voltage & current accuracies are specified from 1 % to 100 % of range or otherwise specified.
Maximum Crest Factor < 1.70:1 at full scale & < 3.4:1 at half scale, and with frequency components fall within the specified frequency bandwidth
for non-sinusoidal waveforms.
Input Impedance : 10MW, 110pF nominal
Range
AC VOLTAGE
Accuracy
Resolution
50Hz ~ 60Hz
±(1%rdg + 3dgts)
1 mV
6.000 V
10 mV
60.00 V
100 mV
600.0 V
1 V
1000 V
60Hz ~ 1kHz
±(2%rdg + 3dgts)
1 mV
6.000 V
10 mV
60.00 V
100 mV
600.0 V
1 V
1000 V
1kHz ~ 3kHz
±(2%rdg + 3dgts)
1 mV
6.000 V
10 mV
60.00 V
100 mV
600.0 V
1 V
1000 V
Unspecified
3kHz ~ 5kHz
±(4%rdg + 5dgts)
1 mV
6.000 V
10 mV
60.00 V
100 mV
600.0 V
1 V
1000 V
Unspecified
Range
VFD AC VOLTAGE
1)
Accuracy
Resolution
10Hz ~ 45Hz
±(4%rdg + 5dgts)
100 mV
600.0 V
45Hz ~ 200Hz
±(2%rdg + 5dgts)
100 mV
600.0 V
1) Unspecified for fundamental frequency > 440Hz
2) Accuracy linearly decreases from 2% + 5d @ 200Hz to 7% + 5d @ 440Hz
Input impedance : 10M , 110pF nominal.W
200Hz ~ 440Hz
±(7%rdg + 5dgts )
2)
100 mV
600.0 V
6.000 V
60.00 V ±(0.2%rdg + 3dgts)
DC VOLTAGE
Accuracy
Resolution
Range
1 mV
10 mV
600.0 V 100 mV
1000 V ±(0.3%rdg + 3dgts)
1 V
Input Impedance : 10MW, 110pF nominal
1) Actual output voltage : 100% ~ 120% of Test Voltage
Live Circuit Detector : Inhibit test and display voltage reading instead if terminal voltage > 30V
prior to initialization of test.
Display Voltage Accuracy : DCV : 1.5% + 5d ;
ACV : 3.0% + 5d @50Hz ~60Hz (unspecified @ >600Vac)
Specified measuring range is 0.020MW....25.0GWfor percentage operating uncertainly B(%)
£± 30% per IEC/EN61557-2 requirements.
INSULATION RESISTANCE
3.000M , 30.00M , 55.0MWWW
3.000M , 30.00M , 110.0MWWW
3.000M , 30.00M , 275.0MWWW
3.000M , 30.00M , 300.0MWWW,
50 V
100 V
1)
Test Voltage
250 V
500 V
Range Test Current
1mA @50kW
1mA @100kW
1mA @250kW
1mA @500kW
Accuracy
±(1.5%rdg + 5dgts)
3.000M , 30.00M , 300.0MWWW
1000 V 3000MW
25.0GW
1mA @1MW
±(10%rdg + 5dgts)
±(1.5%rdg + 5dgts)
±(2.0%rdg + 5dgts)
550.0MW
Open Circuit Voltage : > 4VDC
Live Circuit Detector : Inhibit test if terminal voltage > 2V prior to
initialization of test.
Specified measuring range at percentage operating uncertainly B(%)
£± 30% per IEC/EN61557-4 requirements.
1)
EARTH CONTINUITY TEST
Range Accuracy
Test Current
2.000 W
20.00 W
±(1.5%rdg
+3dgts)
> 200 mA
> 90 mA
Measuring
1)
Range
0.015W~ 2.199W
0.15W~ 21.99W
~ Hz Line Level Frequency
Accuracy :
1) VFD sensitivity linearly decreases from 10% F.S. @200Hz to 40% F.S. @440Hz.
±(0.02%rdg + 4dgts)
Sensitivity
(Sine RMS)
Function Range
0.6 V
6 V
60 V
600 V
1)
60~240 V
Range
10Hz ~ 20kHz
10Hz ~ 3kHz
10Hz ~ 440Hz
6 V
60 V
600 V
1000 V
VFD 600 V
RESISTANCE
600.0W
6.000kW
±(0.9%rdg + 2dgts)
Accuracy
Resolution
Range
100 mW
1 W
60.00kW10 W
Open Circuit Voltage : < 1.5VDC typical
600.0kW100 W
6.000MW
1 kW
±(0.9%rdg + 5dgts)
±(1.2%rdg + 3dgts)
60.00MW
10 kW
±(3.0%rdg + 6dgts)
AUDIBLE CONTINUITY TESTER
Audible Threshold Between 20 and 200WW
Response Time < 30ms approx.
2.000 V ±(1.5%rdg + 4dgts)
DIODE TESTER
1)
Accuracy
Resolution
Range
1 mV
Test Current : 0.5mA typically Open Circuit Voltage : < 2.8VDC typically
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022-24156638 Tel. : [phone], Fax : [phone]
Email : [email protected], Website : www.kusamelectrical.com
An ISO 9001:2008 Company
®®
All Specifications are subject to change without prior notice

The waveforms on today’s AC power lines are anything but clean. Electronic equipment such as office computers, with their switching
power supplies, produce harmonics that distort power-line waveforms. These distortions make measuring AC voltage inaccurate
when you use an averaging DMM.
USE TRUE RMS WHEN MEASURING
AC WAVEFORMS
®
Average voltage measurements work fine when the signal you’re measuring is a pure sine wave, but errors mount as the waveform
distorts. By using true RMS measurements, however, you can measure the equivalent heating effect that a voltage produces,
including the heating effects of harmonics. Table 1 shows the difference between measurements taken on averaging DMMs & those
taken on true RMS DMMs. In each case, the measured signal’s peak-to-peak value is 2V. Therefore, the peak value is 1V.
For a 1-V peak sine wave, the average & RMS values are both 0.707V. But when the input signal is no longer a sine wave, differences
between the RMS values & the average readig values occur. Those errors are most prominent when you are measuring square waves
& pulse waveforms, which are rich in harmonics.
Table 1. Average versus true RMS comparison of typical waveforms.
Waveform Actual
Pk-Pk True RMS Reading Average Reading Reading Error
Sine Wave
Triangle Wave
Pulse (25% duty Cycle)
Pulse (6.25% duty Cycle)
Square Wave
Pulse (12.5% duty Cycle)
2.000 0.707 0.707 0%
2.000 0.577 0.555 -3.8%
2.000 1.000 1.111 +11.1%
2.000 0.433 0.416 -3.8%
2.000 0.331 0.243 -26.5%
2.000 0.242 0.130 -46.2%
One limitation to making true RMS measurements is crest factor, and you should consider crest factor when making AC measurements.
Crest factor is the ratio of a waveform’s peak (”crest”) voltage to its RMS voltage. Table 2 shows the crest factors for ideal waveforms.
Table 2. Crest factors of typical waveforms.
Waveform Crest Factor
DC
Sine Wave
Pulse (12.5% duty Cycle)
1.000
1.000
1.414
1.732
Square Wave
Triangle Wave
Pulse (25% duty Cycle)
Pulse (6.25% duty Cycle)
1.732
2.646
3.873
A DMM’s specifications should tell you the maximum crest factor that the meter can handle while maintaining its measurement
accuracy. True RMS meters can handle higher crest factors when a waveform’s RMS voltage is in the middle of the meter’s range
setting. Typically, a DMM may tolerate a crest factor of 3 near the top of its scale but it might handle a crest factor of 5 that’s in the
middle of the range. Therefore, if you’re measuring waveforms with high crest factors (greater than 3), you should adjust the DMM
so the measured voltage is closest to the center of the measurement range.
Another limitation of true RMS is speed. If you’re measuring relatively clean sine waves, then you can save time & money by using as
averaging DMM. True RMS meters cost more than averaging meters and can take longer to produce measurements, especially when
measuring millivolt-level AC signals. At those low levels, true RMS meters can take several seconds to stabilize a reading. Averaging
meters won’t leave you waiting.
D:/Chhaya/Coreldraw files/True RMS when measuring AC waveforms.cdr

®®
AN ISO 9001:2008 COMPANY
MODEL - KM 877
TRMS DIGITAL
INSULATION MULTIMETER
OPERATION MANUAL
G 17, Bharat Industrial Estate, T. J. Road,
Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct : [phone]
Tel. : [phone]. Fax : [phone]
Email : [email protected]
Website : www.kusamelectrical.com
www.kusam-meco.co.in
®
LIST OF PRODUCTS
¬ Digital Multimeter ¬ Digital AC & AC/DC Clampmeter
¬ AC Clamp Adaptor ¬ AC/DC Current Adaptor
¬ Thermo Anemometer ¬ Thermo Hygrometer
¬ Distance Meter ¬ Digital Lux Meter
¬ Network Cable Tester ¬ Power Factor Regulator
¬ Earth Resistance Tester ¬ Digital Panel Meters
¬ DC Power Supplies ¬ High Voltage Detector
¬ Calibrators ¬ Gas Analysers
¬ Frequency Counter ¬ Function Generator
¬ Phasing Sticks ¬ Battery Tester
¬ Waterproof Pen Testers ¬ Solar Power Meter
¬ EMF Detector
¬ Wood, Paper & Grain Moisture Meter
¬ Transistorised Electronic Analog & Digital Insulation
Resistance Testers(upto 10 KV)
¬ Digital Sound Level Meter & Sound Level Calibrator
¬ Digital contact & Non-contact Type Tachometer
¬ Digital Non-contact (infrared) Thermometer
¬ Maximum Demand Controller/Digital Power Meter
¬ Digital Hand Held Temperature Indicators

®
TRMS DIGITAL
INSULATION MULTIMETER
MODEL - KM 877
®

®
TABLE OF CONTENTS
TITLE PAGE NO.
I. .............................
II. Cenelec Directives......................................
Safety..............................
III. Special Features.........................................
V. Product Description
. Test Certificate...........................................
IX. Warranty......................................................
IV. General Specifications...............................
...................................
VI. Operation....................................................
VII. Maintenance...............................................
VIII
01
03
03
04
10
11
24
26
27
®
01
I. SAFETY :
Terms in this manual :
WARNING : Identifies conditions and actions that could result in
serious injury or even death to the user.
This manual contains information and warnings that must be
followed for operating the instrument safely and maintaining the
instrument in a safe operating condition. If the instrument is used
in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired. The meter is intended
only for indoor use.
CAUTION : Identifies conditions and actions that could cause
damage or malfunction in the instrument.
Measurement Category
Measurement Category IV is applicable to test & measuring circuits
connected at the source of the building’s low-voltage MAINS
installation. Examples are measurements on devices installed before
the main fuse or circuit breaker in the building installation.
Measurement Category III is applicable to test & measuring circuits
connected to the distribution part of the building’s low-voltage MAINS
installation. Examples are measurements on distribution boards
(including secondary meters), circuit-breakers, wiring, including
cables, bus-bars, junction boxes, switches, socket-outlets in the fixed
installation, & equipment for industrial use & some other equipment
such as stationary motors with permanent connection to the
fixed installation
Measurement Category II is applicable to test & measuring circuits
connected directly to utilization points (socket outlets & similar points)
of the low-voltage MAINS installation. Examples are measurements
on MAINS CIRCUITS of household appliances, portable tools &
similar equipment.

02
®
WARNING :
To reduce the risk of fire or electric shock, do not expose this
product to rain or moisture. To avoid electrical shock hazard,
observe the proper safety precautions when working with voltages
above 60 VDC or 30 VAC rms. These voltage levels pose a
potential shock hazard to the user. Do not touch test lead tips or
the circuit being tested while power is applied to the circuit being
measured. Keep your fingers behind the finger guards of the test
leads during measurement. Inspect test leads, connectors, and
probes for damaged insulation or exposed metal before using the
instrument. If any defects are found, replace them immediately.
Never attempt a voltage measurement with the test lead inserted
into the INS./mA or input jack that is available. Only replace
the blown fuse with the proper rating as specified in this manual.
Only use the Test Probe Assemblies provided with the equipment
or UL Listed Probe Assemblies with same rating or better. IEC
61010-031 requires exposed conductive test probe tips to be
£ 4mm for CAT III & CAT IV ratings. It is commonly achieved by
permanently over-molded plastic shrouds, or by detachable Cap
shrouds for interchangeable between CAT II ratings. Refer to the
category markings on your probe assemblies as well as on the
add-on accessories, if any, for applicable rating changes.
The meter protection rating, against the users, is double insulation
per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/
EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/
CSA-C22.2 No. 61010-1-12 Ed. 3.0 to measurement Category III
1KV & Category-IV 600V, AC & DC. All Terminals are also rated to
such measurement categories requirements.
The meter also meets the relevant parts of EN61557 for CE
requirements, & are not certified by UL or ETL. In particular, Part 1
Ed. 2.0 General requirements, Part 2 Ed. 2.0 Insulation Resistance
& Part 4 Ed. 2.0 Resistance of earth connection & equipotential
bonding, where applicable.
®
03
III. SPECIAL FEATURES :
VFD V & Hz readings.
Record MAX / MIN readings.
Display Hold Function.
Display.
LOCK-Test mode for Insulation Resistance &
Earth Continuity Test.
BeepJack audible & visible input warning.
Remote Probe for insulation Resistance &
Earth Continuity Test.
—
— Paper-White
—
—
— Dual Digital
—
—
—
Backlight LCD Display
TM
CAUTION :
Disconnect the test leads from the test points before changing
functions. Always set the instrument to the highest range and work
downward for an unknown value when using manual ranging mode.
INTERNATIONAL ELECTRICAL SYMBOLS :
Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse
AC--Alternating Current
DC--Direct Current
II. CENELEC DIRECTIVES :
The instruments conform to CENELEC Low-voltage directive 2006/
95/EC and Electromagnetic compatibility directive 2004/108/EC.

04
®
IV. GENERAL SPECIFICATIONS :
Display : 3-5/6 digits 6,000 counts
Polarity : Automatic
Update Rate : 5 per second nominal
61 Segments Bar graph : 40 per second max
Operating Temperature : -10ºC to 40ºC
Relative Humidity : Maximum relative humidity 90% for
temperature up to 28ºC decreasing
linearly to 50% relative humidity at 40ºC
Pollution degree : 2
IP Rating : IP40
Storage Temperature : -20ºC to 60ºC, < 80% R.H.
(with battery removed)
Altitude : Operating below 2000m
Temperature Coefficient : nominal 0.15 x (specified accuracy)/ºC
@(-10ºC ~ 18ºC or 28ºC ~ 40ºC), or
otherwise specified
Sensing : AC, True RMS
Low Battery : Approx. 4.6V
APO Timing : Idle for 20 minutes
APO Consumption : 50mA typical
Power Supply : Four Alkaline AA batteries (IEC LR6)
Power Consumption : 4.5mA typical except:
+Hz +Hz
ACV & VFD ACV : 7.0mA
Dimension : 208(L) X 103(W) X 64.5(H) mm
with holster
Weight : 635 gm with holster
Accessories : Test probe pair, Alligator clip pair,
BRP21S2-C Remote probe
Optional Accessories : BMH-01 magnetic hanger
®
05
SAFETY :
Safety : Double insulation per IEC/UL/EN61010-1
Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0,
IEC/EN61010-2-033 Ed. 1.0, IEC/UL/
EN61010-031 Ed. 1.1 and CAN/CSA-
C22.2 No. 61010-1-12 Ed. 3.0
Measurement Category : CAT III 1000 V AC & DC and CAT IV
600V AC & DC
Compliance to IEC/EN61557 (Per CE requirements, not
certified by UL or ETL): IEC/EN61557-1, IEC/EN61557-2 &
IEC/EN61557-4 where applicable.
Overload Protections :
Earth Continuity Test : 0.25A/1KV, IR 30kA or better
V : 1100Vrms
mV, W & Others : 1000 Vrms
Transient protection : 8kV (1.2/50ms surge)
E.M.C. :
Meets EN61326-1:2006 (EN55022, EN61000-3-2, EN61000-3-3,
EN61000-4-2, EN61000-4-3, EN61000-4-4, EN61000-4-5,
EN61000-4-6, EN61000-4-8, EN61000-4-11)
In an RF field of 3V/m :
Total Accuracy = Specified Accuracy + 25 digits
Performance above 3V/m is not specified
Earth Continuity Test :
110mA@20W Range,
[email protected]W Range
Tester can perform at least 3000 Earth Eontinuity Test
measurements with new alkaline batteries at room temperature.
These are standard tests of 1W with a duty cycle of 5 seconds
on and 25 seconds off.

06
®
ELECTRICAL SPECIFICATIONS :
Accuracy is (% reading digits + number of digits) or otherwise
specified, at 23C 5C & less than 80% relative humidity. True RMS
voltage & current accuracies are specified from 1 % to 100 % of
range or otherwise specified. Maximum Crest Factor < 1.70:1 at full
scale & < 3.4:1 at half scale, and with frequency components within
the specified frequency bandwidth for non-sinusoidal waveforms.
AC Voltage :
Accuracy
Resolution
Range
6.000 V
60.00 V
600.0 V
1000 V
±(1%rdg + 3dgts)
1 mV
10 mV
100 mV
1 V
50Hz ~ 60Hz
6.000 V
60.00 V
600.0 V
1000 V
±(2%rdg + 3dgts)
1 mV
10 mV
100 mV
1 V
60Hz ~ 1kHz
Insulation Resistance @1mA test current :
50V output voltage : 25mA
100V output voltage : 45mA
250V output voltage : 85mA
500V output voltage : 170mA
1000V output voltage : 440mA
Tester can perform at least 950 insulation tests with new alkaline
batteries at room temperature. These are standard tests of 1000 V
into 1 MW with a duty cycle of 5 seconds on and 25 seconds off.
®
07
Input Impedance : 10MW, 110pF nominal
6.000 V
60.00 V
600.0 V
1000 V
±(2%rdg + 3dgts)
1 mV
10 mV
100 mV
1 V
1kHz ~ 3kHz
6.000 V
60.00 V
600.0 V
1000 V
±(4%rdg + 5dgts)
1 mV
10 mV
100 mV
1 V
3kHz ~ 5kHz
Unspecified
Unspecified
DC Voltage :
Input Impedance : 10MW, 110pF nominal
Accuracy
Resolution
Range
6.000 V
60.00 V
600.0 V
1000 V
±(0.2%rdg + 3dgts)
1 mV
10 mV
100 mV
1 V ±(0.3%rdg + 3dgts)
1) Unspecified for fundamental frequency > 440Hz
3) Accuracy linearly decreases from 2%+5d@200Hz to 7%+5d@440Hz.
Input impedance : 10M , 110pF nominal.W
VFD AC Voltage :
1)
Accuracy
Resolution
Range
600.0 V ±(4%rdg + 5dgts)
100 mV
10Hz ~ 45Hz
600.0 V ±(2%rdg + 5dgts)
100 mV
45Hz ~ 200Hz
600.0 V 2)
±(7%rdg + 5dgts )
100 mV
200Hz ~ 440Hz

08
®
Insulation Resistance :
1) Actual output voltage : 100% ~ 120% of Test Voltage
Live Circuit Detector : Inhibit test and display voltage reading instead
if terminal voltage > 30V prior to initialization of test.
Display Voltage Accuracies :
DCV : 1.5% + 5d
ACV:3.0% + 5d @50Hz ~ 60Hz (unspecified @ >600Vac)
3.000M , 30.00M , 55.0M
3.000M , 30.00M , 110.0M
3.000M , 30.00M , 275.0M
3.000M , 30.00M , 300.0M
550.0M
3.000M , 30.00M , 300.0M
W W W
W W W
WWW
WWW,
W
WWW
3000MW
25.0GW
50 V
100 V
250 V
500 V
1000 V
1)
Test Voltage Range Test Current
1mA @50kW
1mA @100kW
1mA @250kW
1mA @500kW
1mA @1MW
Accuracy
±(1.5%rdg + 5dgts)
±(10%rdg + 5dgts)
±(1.5%rdg + 5dgts)
±(2.0%rdg + 5dgts)
Earth Continuity Test :
Open Circuit Voltage : > 4VDC
Live Circuit Detector : Inhibit test if terminal voltage >2V prior to
initialization of test.
1) Specified measuring range at percentage operating uncertainty B[%]
£ ±30%per IEC/EN61557-4 requirements.
Accuracy
Resolution
Range
2.000 W
20.00 W
±(1.5%rdg+3dgts)
> 200 mA
> 90 mA
Measuring Range1)
0.015W ~ 2.199W
0.15W ~ 21.99W
Diode Tester :
Test Current (Typical) : 0.5mA
Open Circuit Voltage : < 2.8VDC
2.000 V ±(1.5%rdg + 4dgts)
Accuracy
Resolution
Range
1 mV
®
09
Resistance :
Open Circuit Voltage : <1.5VDC typical
600.0
6.000 K
60.00 K
600.0 K
6.000 M
60.00 M
W
W
W
W
W
W
±(0.9%rdg + 5dgts)
Accuracy
Resolution
Range
100 m
1
10
100
1 k
10 k
W
W
W
W
W
W
±(0.9%rdg + 2dgts)
±(3.0%rdg + 6dgts)
±(1.2%rdg + 3dgts)
Accuracy :
2) VFD sensitivity linearly decreases from 10% F.S. @200Hz
to 40% F.S. @440Hz.
±(0.02%rdg + 4dgts)
Hz Line Level Frequency :
6 V
60 V
600 V
1000 V
VFD 600 V
Range
Sensitivity
(Sine RMS)
Function Range
0.6 V
6 V
60 V
600 V
2)
60~240 V
10Hz ~ 20kHz
10Hz ~ 3kHz
10Hz ~ 440Hz
Audible Continuity Tester :
Between 20W and 200W.
< 30ms approx.
Audible Threshold
Response time

10
®
1. 3-5/6 digits 6000 counts
dual displays.
2. Push-buttons for special
functions & features.
3. Selector to turn the Power
On or Off and Select a
function.
4. Input Jack only for
Earth Continuity Test
function.
5. C o m m o n ( G r o u n d
reference) Input Jack for
all functions EXCEPT
Insulation Resistance
function.
6.
Input Jack for all functions
EXCEPT Earth
Continuity Test & mA
functions.
7. Input Jack for insulation
function Ground reference
INS. or mA function
positive input.
–
7
6
5
4
3
2
1
V. PRODUCT DESCRIPTION :
Note : Top of the line model is used as representative for illustration
purposes. Please refer to your particular model for function
availability.
Analog bar-graph :
The analog bar graph provides a visual indication of measurement
like a traditional analog meter needle. It is excellent in detecting
faulty contacts, identifying potentiometer clicks, and indicating
signal spikes during adjustments.
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
...
0 6
...
®
11
CAUTION :
Before and after hazardous voltage measurements, test the voltage
function on a known source such as line voltage to determine
proper meter functioning.
VI. OPERATION :
+Hz +Hz
ACV & VFD ACV Functions :
Press the SELECT button momentarily to toggle the subject
functions. Last selection will be saved as power up default for repeat
+H z
measurement convenience. For ACV function, press the
RANGE button momentarily to select other ranges when needed.
+Hz
For VFD ACV function, only 600V range is available to best cope
with the range of most Variable Frequency Drives (VFD)
measurements.
DCV Function :Turn Rotary Knob to DCV position for measurement.
AUTO
Hz
V+Hz
.
0 6
V
SELECT RANGE HOLD
REC
INSULATION
H
R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
(0.4A)
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
.
HzV
VFD
AUTO
Hz
V+Hz
VFD
VFD
VFD
.
0 6
V
SELECT RANGE HOLD
REC
INSULATION
H
R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
.
VFD
1
SELECT
AUTO
V
0 6
V
SELECT RANGE HOLD
REC
INSULATION
H
R
TEST
200mA
INS.
–mA
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
.
–+
V
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
PI/DAR
ZERO
COMPARE
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
ZERO
COMPARE
PI/DAR
(0.4A)

®
13
0600
V
SELECT RANGE HOLD H
LOCK
.
pp
FORWARD BIAS
REC
INSULATION R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
(0.4A)
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
–+
OL
V
SELECT RANGE HOLD H
LOCK
.
pp
REVERSE BIAS
REC
INSULATION R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
–+
Discharge capacitors before making any measurement. Large value
capacitors should be discharged through an appropriate resistance
load.
CAUTION :
Normal forward voltage drop (forward biased) for a good silicon
diode is between 0.400V to 0.900V. A reading higher than that
indicates a leaky diode (defective). A zero reading indicates a
shorted diode (defective). An OL indicates an open diode (defective).
Reverse the test leads connections (reverse biased) across the
diode. The digital display shows OL if the diode is good. Any other
readings indicate the diode is resistive or shorted (defective).
Diode Test Function
W
Diode Test function is combined to its / / Rotary Knob
position.
PI/DAR
ZERO
COMPARE
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
1
SELECT
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
12
®
W Resistance, Continuity
Press the SELECT button momentarily to toggle the functions. Last
selection will be saved as power up default for repeat measurement
convenience. Continuity function is convenient for checking
wiring connections & operation of switches. A continuous beep
tone indicates a complete wire.
Using resistance or continuity function in a live circuit will produce
false results and may damage the instrument. In many cases the
suspected component must be disconnected from the circuit to
obtain an accurate reading.
CAUTION :
AUTO
0 6
k
SELECT RANGE HOLD H
LOCK
.
REC
INSULATION R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
(0.4A) 1000V CAT III
MAX
600V CAT IV
INSULATION
–+
–+
W
0 6
SELECT RANGE HOLD H
LOCK
.
REC
INSULATION R
TEST
200mA
INS.
–
INS.
+
JACK WV
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
–+
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
W
ZERO
COMPARE
PI/DAR
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
ZERO
COMPARE
PI/DAR
1
SELECT

14
®
Earth Continuity Test Function :
This function measures the Resistance values of earth connection
& equipotential bonding in Low Voltage Distribution Systems upto
Nominal Voltage (Un) 830V, Phase-to-phase. DO NOT use on
Systems with Nominal Voltages above that. Measurements shall
only be carried out on de-energized circuits. The measuring loop
is protected by an HBC 1KV F fuse against accidental extraneous
overvoltages.
TEST
The LCD icon used alone throughout in this manual is referred
as active measurements of Earth Continuity Test Function through
the activation of the TEST button on the meter or on the Remote
Probe. Check the fuse before each . If the fuse is open, the
meter will display “OPEn” when the is being activated at no
circuit connection to the probes. Refer to the maintenance section
for fuse replacement.
TEST
TEST
is inhibited when the meter beeps and displays “>2V” plus
warning against energized circuit of more than 2V is being
connected, before the is active. Connecting to energized
circuits when the is active will produce false results & may
blow the protection fuse and / or damage the instrument. Always
check with voltage function & remove power from the circuits
before carrying out the .
TEST
TEST
TEST
TEST
The results of measurements can be adversely affected by
impedances of additional operating circuits connected in parallel or
by transient currents.
Setup as illustrated below. This function uses measuring currents
of 200mA for 2.199W range & 90mA for 21.99W range measure-
ments, auto-ranging. Press the RANGE button momentarily to
override auto-ranging & select a range. Press & hold for 1 second
or more to resume auto-ranging.
≥ ≥
®
15
The is active as long as the TEST button is pressed and hold.
The TEST buttons on the meter & on the Remote Probe work
alike. The Continuity Resistance readings are shown on the
primary display. The RANGE of measuring current is indicated
on the secondary display as “200mA” or “90mA”. The meter
further gives a beep sound for continuity when the active
Resistance reading is “<2W”.
TEST
Default startup primary display reading is “-.---”. Allow enough
time for a good measuring result. After the is released, the
last measuring display stays unitl the next or a function change.
TEST
TEST
TEST
AUTO
0 6
2
V
SELECT RANGE HOLD H
LOCK
200
REC
INSULATION R
TEST
@
mA
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
AUTO
05 i7
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
200
@
mA
W
.
TEST
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
AUTO
0 6
05 i7
SELECT RANGE HOLD H
LOCK
200
REC
INSULATION R
TEST
@
mA
TEST
TEST
.
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
TEST
Press
& Hold
+
W
Lock-Test mode is recommended for continuous measurement. To
apply, press the LOCK button momentarily to display the
annunciator LOCK before pressing the TEST button momentarily.
The LCD will show both LOCK & to indicate continuous
measurement is active. Press again either button momentarily to
release the Lock-Test mode.
TEST
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
ZERO
COMPARE
PI/DAR
Press
& Hold
TEST
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
PI/DAR
ZERO
COMPARE

16
®
AUTO
––––
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
@
mA
W
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
AUTO
––––
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
200
@
mA
W
LOCK
LOCK
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
ZERO mode is useful for offsetting measuring probes residue
resistance reading in consecutive readings. Only residue
readings from the 2,199W (200mA) range can be set as offset
reference value. To apply, activate the Lock-Test as mentioned
above. Connect the probes together to show the residue resistance
reading & then press the ZERO button momentarily. The LCD will
display a zero reading with the annuciator turns on. The residue
resistance reading is then saved temporarily as offset value for the
that follow until a further function change or power off.
∆
TEST
TEST
AUTO
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
@
mA
LOCK
LOCK
.
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
TEST
1
TEST
+
TEST
AUTO
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
@
mA
LOCK
.
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
TEST
AUTO
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
@
mA
LOCK
.
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
TEST
1
+
TEST
(0.4A)
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
ZERO
COMPARE
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
LOCK
1
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
PI/DAR
ZERO
COMPARE
1
TEST
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
1
ZERO
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
1
TEST
INS.
+
W
V
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
(0.4A)
PI/DAR
ZERO
COMPARE
®
17
Insulation Resistance function :
The LCD icons used together throughout in this manual is
referred as active measurements of Insulation Resistance
Function through the activation of the TEST button on the meter or
on the Remote Probe. The sources a user selectable test
voltage of 50V, 100V, 250V, 500V or 1000V to measure Insulation
Resistance values. The in a flashing manner warns against
test voltage is being output. Use extreme caution when operating
the to avoid electric shock.
TEST
TEST
TEST
is inhibited when the meter sounds 3-beeps and displays
the detected voltage value plus warning against energized circuit
of more than 30V is being connected, before the is active.
Measurements shall only be carried out on parts of an installation
or equipment that are de-energized.
WARNING
TEST
TEST
Connecting to energized circuits when the is active will
produce false results and may damage the instrument. Always check
with voltage functions and remove power from the circuits before
carrying out the .
TEST
TEST
Select an intended test voltage of 50V, 100V. 250V. 500V or 1000V.
turn the Rotary Knob directly to select the intended voltage instead.
The secondary display shows the selected voltage for 1 second right
after the selection, and then displays the actual detected voltage
readings. The voltage annunciator by the secondary display remains
indicating the voltage selected.
Setup as illustrated below.

18
®
––––
M
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
100v
V
100V
50V...1000V
INSULATION
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
(0.4A) 1000V CAT III
MAX
600V CAT IV
INSULATION
–+
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
250v
V
250V
Test
Voltage
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
M
0 I I2
V
SELECT RANGE HOLD H
LOCK
––––
REC
INSULATION R
TEST
250v
V
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
(0.4A)
The is active as long as the TEST button is pressed and
hold. The TEST buttons on the meter and on the Remote Probe
work alike. The Insulation Resistance readings are shown on the
primary display.
TEST
Default startup primary display reading is "-.---". Allow enough
time for a good measuring result. After the ink, is released,
the measuring loop starts to discharge the testing voltage. The last
measured resistance reading stays on the primary display until the
next or a function change. The secondary display keeps
showing the actual detected voltage readings.
TEST
TEST
TEST
Lock-Test mode is recommended for continuous measurements.
To apply, press the LOCK button momentarily to display the
annunciator LOCK before pressing the TEST button
momentarily. The LCD will show both LOCK & to indicate
continuous measurement is active. Press again either button
momentarily to release the Lock-Test mode.
TEST
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
PI/DAR
ZERO
COMPARE
ZERO
COMPARE
PI/DAR
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
1
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
ZERO
COMPARE
PI/DAR
®
19
NOTE. Maximum display reading of each Insulation Resistance
range is subjected to the test voltage selected. They are 55.0MW,
110.0MW, 275MW, 550MW & 25.0GW for 50V, 100V, 250V, 500V &
1000V respectively. Over-range is indicated as > maximum
display-reading.
+
1
TEST
M
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
250v
V
.
W
200mA
INS.
–
INS.
+
JACK
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
W
V
LOCK
TEST flash
TEST
M
SELECT RANGE HOLD
ZERO
H
LOCK
REC
INSULATION R
TEST
250v
W
V
HzV
VFD
OFF
V
W
200mA
INS.
–
INS.
+
JACK
COM
HBC FUSED
(0.25A) HBC FUSED
(0.4A) 1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
W
V
LOCK
TEST flash
+
M
Test Voltage
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
250v
V
.
W
200mA
INS.
–
INS.
+
JACK
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
W
V
flash
TEST
TEST
TEST
Press
& Hold
––––
M
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
250v
V
W
250V
200mA
INS.
–
INS.
+
JACK W
V
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
LOCK
LOCK
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
1
+
1
TEST
TEST
M
SELECT RANGE HOLD H
LOCK
REC
INSULATION R
TEST
250v
V
.
W
200mA
INS.
–
INS.
+
JACK
COM
HBC FUSED
(0.25A) HBC FUSED
1000V CAT III
MAX
600V CAT IV
INSULATION
–+
LOCK
W
V
LOCK
TEST flash
INSULATION
50V
100V 250V 500V
1kV
200mA
PI/DAR
COMPARE
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
1
TEST
(0.4A)
PI/DAR
ZERO
COMPARE
ZERO
COMPARE
PI/DAR
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
Press
& Hold
TEST
(0.4A)
W
V
HzV
VFD
OFF
INSULATION
50V
100V 250V 500V
1kV
200mA
1
TEST
(0.4A)
PI/DAR
ZERO
COMPARE
ZERO
COMPARE
PI/DAR

20
®
COMPARE mode
This mode uses a preset insulation resistance threshold value for
PASS/FAIL measuring comparison. The LCD annuciator turns
on when the reading is higher than the selected threshold
value. On the contrary, the LCD annuciator turns on and the
meter chirps when the reading is below such value.
PASS
TEST
FAIL
TEST
To enable, press the COMPARE button momentarily. The LCD
annuciator turns on. Press the COMPARE button momentarily
again to select the preset threshold values in sequence. Last
threshold values selected for each test voltage range will be saved
separately as power up default for repeat measurement conven-
ience. Press the COMPARE button for 1 second or more to exit.
C
NOTE. Selectable threshold values for the test voltage ranges are
100kW/ 200kW/ 500kW/ 1M
50V & up. Additional 100MW for 100V & up, 200MW for 250V & up
and 500MW for 500V & 1000V ranges.
W/ 2MW/ 5MW/ 10MW/ 20MW/ 50MW for
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
C
M W
500
V
W
M
20MW
C
1
COMPARE
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
C
M W
500
V
W
M
50MW
C
1
COMPARE
®
21
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
C
M W
500
V
PASS
W
M
TEST
C
TEST
flash
PASS
Press
& Hold
TEST
+
TEST
Press
& Hold
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
C
M W
500
V
W
M
TEST
C
TEST
flash
Press
& Hold
TEST
+
TEST
Press
& Hold
FAIL
FAIL
PI/DAR mode
PI (Polarization Index) is the ratio of the 10-minute insulation resistance
to the 1-minute insulation resistance.
PI= R(10-min)
R(1-min)
DAR (Dielectric Absorption Ratios) is the ratio of the 1-minute insulation
resistance to the 30-second insulation resistance.
DAR= R(1-min)
R(30-sec)
A general guide to interpret the PI or DAR test result are:
Insulation Condition PI (Polarization Index) DAR (Dielectric Absorption Ratios)
Dangerous
Questionable
Good
Excellent
<1.0
<2.0
<4.0
>4.0
-
<1.3
<1.6
>1.6
Press the PI/DAR button momentarily to enable PI mode with the LCD
annunciator turned on. Press momentarily again toggle to the DAR
mode with the LCD annunciator turned on. The secondary display
shows the measuring lap times of 10'00" and 01'00" for PI and DAR
modes respectively.
PI
DAR

22
®
Then, activate Lock-Test mode LOCK & to start PI or DAR
count-down measurements. The timer on the secondary display started
to count down. The primary display shows the real-time resistance
readings until the timer shows 00’00” for a result. The maximum
display result is “5.0”, and the display shows “>5.0” for results beyond
that. If the measured resistance reading is over-range, the meter will
stop and display “Err”. Press the PI/DAR button for 1 second
or more to exit.
TEST
TEST
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
PI
500
V
W
M
PI
1
PI/DAR
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
DAR
500
V
W
M
1
PI/DAR
DAR
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
DAR
500
V
W
M
LOCK
1
LOCK
LOCK
DAR
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
DAR
500
V
W
M
TEST
LOCK
1
TEST
flash
TEST
LOCK
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
DAR
500
V
W
M
TEST
LOCK
flash
TEST
LOCK
TEST R
H
HOLD
REC
INSULATION
PI/DAR
SELECT RANGE
COMPARE
ZERO LOCK
JACK
INS. COM
INS.
WV
200mA
MAX
1000V CAT III
600V CAT IV
INSULATION
HBC FUSED
( 0.25A ) HBC FUSED
( 0.4A )
INSULATION
50V
100V 250V 500V
1kV
200mA
W
V
V
Hz
OFF
VFD
DAR
500
V
LOCK
flash
TEST
LOCK
®
23
Backlighted display :
Press button momentarily to toggle the LCD backlight. The
backlight will also be turned off automatically after approximate 37
seconds to extend battery life.
Auto- or Manual-ranging (Volt, mA & Ω functions only) :
Press the RANGE button momentarily to select manual-ranging,
and the meter will remain in the range it was in, the LCD turns
off. Press the button momentarily again to select an adjacent range.
Press and hold the button for 1 second to resume auto-ranging.
AUTO
Hold: The hold feature freezes the display for later view. Press the
HOLD button momentarily to toggle the hold feature. This
feature does not apply to Earth Continuity Test & Insulation
Resistance Functions.
MAX/MIN Recording Mode: Press REC button momentarily to
activate MAX/MIN recording mode. The LCD “R” & “MAX MIN” turn
on. The meter beeps when new MAX(maximum) or MIN(minimum)
reading is updated. Press the button momentarily to read the Real-
time, MAX & MIN readings in sequence. Press the button for 1
second or more to exit MAX/MIN recording mode. When activated,
Auto-Power-Off is disabled automatically. This feature does not
apply to Earth Continuity Test & Insulation Resistance functions.
Beep-Jack™ Input Warning :The meter beeps as well as displays
“InEr” to warn the user against possible damage to the meter due
to improper connections to the “mA” (“ INS. mA”) input jack when
other functions, especially voltage function, is selected.
–
Smooth mode (Insulation function only) :
Smooth mode displays the running average of the last eight
measured readings having changes within 300 counts in sequence.
On the contrary, it displays directly, without smoothing, the measured
reading that is beyond 300 counts in changes comparing to its former
one. Press the button momentarily to enable with LCD annuciator
“ ” turned on. Press momentarily again to disable.

24
®
Auto-Power-off (APO) : The Auto-Power-off (APO)mode turns the
meter off automatically to extend battery life after approximately 20
minutes of no rotary switch or push button operations. To wake up
the meter from APO, press the SELECT, or turn the rotary switch
OFF and then back on. Always turn the rotary switch to the OFF
position when the meter is not in use.
Disabling Auto-Power-off :
Press the SELECT button while turning the meter on to temporarily
disable the Auto-Power-Off feature. Turn the rotary switch OFF and
then back on to resume.
MAINTENANCE :
WARNING :
To avoid electrical shock, disconnect the meter from any circuit,
remove the test leads from the input jacks and turn OFF the meter
before opening the case. Do not operate with open case. Install
only the same type of fuse or equivalent
Cleaning and Storage :
Periodically wipe the case with a damp cloth and mild detergent; do
not use abrasives or solvents. If the meter is not to be used for
periods of longer than 60 days, remove the battery and store it
separately.
Trouble Shooting :
If the instrument fails to operate, check battery, fuses, leads, etc.,
and replace as necessary. Double check operating procedure as
described in this manual.
Set Beeper Off : Press the RANGE button while turning the
meter on to temporarily disable the Beeper feature. Turn the rotary
switch OFF and then back on to resume.
®
25
Battery and Fuse replacement :
Loosen the screws from the access cover of the case bottom. Lift the
access cover. Replace the batteries or fuse. Re-fasten the screws.
If the instrument voltage-resistance input terminal has subjected to
high voltage transient (caused by lightning or switching surge to the
system) by accident or abnormal conditions of operation, the series
input protection resistors may be blown off (become high impedance)
like fuses to protect the user and the instrument. Most measuring
functions through this terminal will then be open circuit. The series
input protection resistors and the spark-gaps (or varistors) should
then be replaced by qualified technician. Refer to the WARRANTY
section for obtaining warranty or repairing service.
Battery and Fuse replacement :
Battery use : Four 1.5V AA battery (IEC LR6)
Fuses use :
Fuse (F2) for INS./mA input :
0.4A/1000Vac & Vdc, IR 30kA or better, FF fuse;
Dimension : 6 x 32 mm
Fuse (F3) for Earth Continuity Test input :
0.25A/1000Vac & Vdc, IR 30kA or better, FF fuse;
Dimension : 6 x 32 mm
–
AA
+
AA +
AA
+
F2
F3

26
®
MUMBAI
TEST CERTIFICATE
TRMS DIGITAL INSULATION MULTIMETER
This Test Certificate warrantees that the product has been
inspected and tested in accordance with the published
specifications.
The instrument has been calibrated by using equipment
which has already been calibrated to standards traceable
to national standards.
MODEL NO. ________________
KM 877
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO
®
27
WARRANTY
Each “KUSAM-MECO” product is warranted to be free from defects in
material and workmanship under normal use & service. The warranty
period is one year (12 months) and begins from the date of despatch of
goods. In case any defect occurs in functioning of the instrument,
under proper use, within the warranty period, the same will be rectified
by us free of charges, provided the to and fro freight charges are borne
by you.
This warranty extends only to the original buyer or end-user customer
of a “KUSAM-MECO” authorized dealer.
This warranty does not apply for damaged Ic’s, fuses, burnt PCB's,
disposable batteries, carrying case, test leads, or to any product which
in “KUSAM-MECO’s” opinion, has been misused, altered, neglected,
contaminated or damaged by accident or abnormal conditions of
operation or handling.
“KUSAM-MECO” authorized dealer shall extend this warranty on new
and unused products to end-user customers only but have no authority
to extend a greater or different warranty on behalf of “KUSAM-MECO”.
“KUSAM-MECO’s” warranty obligation is limited, at option, free of
charge repair, or replacement of a defective product which is returned
to a “KUSAM-MECO” authorized service center within the warranty
period.
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. “KUSAM-MECO” SHALL NOT BE LIABLE
F O R A N Y S P E C I A L , I N D I R E C T, I N C I D E N TA L O R
CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
DATA, ARISING FROM ANY CAUSE WHATSOEVER.
All transaction are subject to Mumbai Jurisdiction.