Kusam-meco KM 181 User manual

LIST OF PRODUCTS
OPERATION
MANUAL
DIGITAL CLAMPMETER
+ MULTIMETER
KM 181
* 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
®

®
KUSAM-MECO April 2011
DIGITAL CLAMPMETER
+
MULTIMETER
KM 181
KUSAM-MECO April 2011
Nearly every electrical engineer has a hand held
digital clamp meter (Tongtester). We sometimes take
them for granted, until we damage them or “burn
them out”. If you incorrectly connect your clamp
meter to a circuit, or if you have the clamp meter on
wrong setting, you damage the meter and possibly
hurt yourself. You can also get into trouble if you try to
measure the voltage across a charged capacitor.
Clamp meter users frequently burn their meters
by trying to measure current the same way as they
measure voltage. Remember, you measure voltage
across a circuit, and current through a circuit. When
you use the current input, your clamp meter becomes
a low impedance circuit element.
Even if you correctly insert your clamp meter in to
the circuit, you can still damage your meter. Don’t try
to measure current in excess of your meter’s
capacity. Check the current capacity of the Clamp
meter.
If you are measuring current in industrial
environment to prevent excess current from flowing
through your meter, always disconnect your test
leads from the circuit under test whenever you
change Clamp meter functions. Set your meter to
the correct function, say current, and its highest
range for the setting. If the reading is small, change
the range to the next lower range till the reading can
be read with the best possible accuracy. When
measuring voltage, connect the test leads before
your apply power to your circuit. To be safe, start by
setting your meter to its highest range first.
TAKE MEASUREMENT CAREFULLY AND YOU’LL
SPARE YOUR METER AND YOURSELF, SOME PAIN
®

TABLE OF CONTENTS
TITLE PAGE
KUSAM-MECO April 2011
Safety Information..............................................1
Safety Symbols...................................................3
Features...............................................................4
General Specifications.......................................5
Electrical Specification ......................................7
Product Description ........................................12
Measurement Procedure..................................13
Maintenance......................................................25
Test Certificate .................................................27
Warranty ...........................................................28
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1
1. SAFETY INFORMATION
KUSAM-MECO April 2011
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 protection rating, against the users, is
double insulation per IEC61010-1 2nd Ed.,
EN61010-1 2nd Ed., UL61010-1 2nd Ed., CAN/
CSA C22.2 No. 61010.1-0.92, IEC61010-2-032,
EN61010-2-032, UL61010B-2-032, & CAN/CSA
C22.2 No. 61010-2-032-04 :
Measurement Category III 600V AC & DC.
Per IEC61010-1 2nd Ed. (2001) Measurement
Category
Measurement Category IV (CAT IV) is for
measurements performed at the source of the low-
voltage installation. Examples are electricity
meters and measurements on primary overcurrent
protection devices and ripple control units.
Measurement Category III (CAT III) is for measure-
ments performed in the building installation.
Examples are measurements on distribution boards,
circuit-breakers, wiring, including cables, bus-bars,
junction boxes, switches socket-outlets in the fixed
installation, & equipment for industrial use & some
other equipment, for example, stationary motors
with permanent connection to the fixed installation.

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KUSAM-MECO April 2011
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Measurement Category II (CAT II) is for measure-
ments performed on circuits directly connected to the
low voltage installation. Examples are measure-
ments on household appliances, portable tools &
similar equipment.
TERMS IN THIS MANUAL
WARNING Identifies conditions & actions that could
result in serious injury or even death to
the user.
CAUTION Identifies conditions & actions that could
cause damage or malfunction in the
instrument.
WARNING
To reduce the risk of fire or electric shock, do not
expose this product to rain or moisture. The meter is
intended only for indoor use.
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. Before and after
hazardous voltage measurements, test the voltage
function on a known source such as line voltage to
determine proper meter functioning.
Keep your hands/fingers behind the hand / finger
barriers (of the meter and the test leads) that
indicate the limits of safe access of the hand held
part during measurement. Inspect test leads,
connectors, and probes for damaged insulation or
exposed metal before using the instrument.
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KUSAM-MECO April 2011
®
If any defects are found, replace them immediately.
Only use the test lead provided with the equipment
or UL Listed Probe Assembly.
This Clamp-on meter is designed to apply around
or remove from uninsulated hazardous live
conductors. But still, individual protective equip-
ment must be used if hazardous live parts in the
insulation where measurement is to be carried out
could be accessible.
Disconnect the test leads from the test points
before changing meter functions.
CAUTION
2. INTERNATIONAL ELECTRICAL SYMBOLS
AC--Alternating Current
DC--Direct Current
Earth (Ground)
Double Insulation or Reinforced insulation
Application around and removal from
hazardous live conductors is permitted.
Fuse.
Caution ! Risk of electric shock
Caution ! Refer to the explanation in this
Manual.
7
~
7

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KUSAM-MECO April 2011
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The instruments conform to CENELEC Low-
Voltage directive 2006/95/EC and Electromagnetic
compatibility directive 2004/108/EC
3) CENELEC Directives
?
?5ms CREST-MAX capture mode
(Peak Hold)
?Autoranging Relative -Zero mode
?
?EF-Detection (NCV)
TM
?AutoCheck Voltage & Ohms
?Hz Line Level Frequency
?Manual / Autoranging range selection.
?Auto Power Off
?Diode Test & Continuity Test
VFD-V & VFD-Hz function
Data Hold function
4) SPECIAL FEATURES:
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KUSAM-MECO April 2011
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5) GENERAL SPECIFICATIONS
?Display :
3-5/6 digits 6000 counts & 3-1/2 digits 1,999
counts for Hz.
?Polarity : Automatic
?Update Rate: 5 per second nominal;
?Operating Temperature : 0°C to 40°C
?Pollution degree : 2
?Altitude : Operating below 2000m
?Relative Humidity :
Maximum relative humidity 80% for
temperature up to 31°C decreasing linearly to
50% relative humidity at 40°C
?Storage Temperature :
-20°C to 60°C,<80%R.H.(with battery removed)
?Temperature Coefficient :
Nominal 0.15 x (specified accuracy) / °C @
(0°C--18°C or 28°C--40°C) or otherwise
specified.
?Sensing : Average sensing.
?Transient Protections : 6.0kV(1.2/50ms surge)
?Safety : Double insulation per IEC61010-1
nd nd nd
2 Ed., EN61010-1 2 Ed., Ul61010- 2 Ed. &
CAN/CSA C22.2 NO.61010.1-0.92 to CAT III
600V and CAT IV 300V AC & DC

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KUSAM-MECO April 2011
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?Overload Protections:
ACA Clamp on jaws : AC 600 A rms continuous
“+” & COM Terminals(all other functions):
660VDC / VAC rms
?Power Supply : 1.5V AAA Size battery X 2
?Power consumption : 5.2mA typical
?Low battery : Below approx. 2.4V
?APO Timing : Idle for 34 minutes
?APO Consumption : 10µA typical
?Dimension : 190(L) X 63(W) X 32(H) mm
?Weight : 179gm
?Accessories : Test leads(pair),User's Manual.
?Optional Accessories: PC Interface,
USB interface kit BRUA-13X.
?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.
Capacitance function is not specified
Other function ranges : Total Accuracy =
Specified Accuracy + 100 digits
Performance above 3V/m is not specified
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KUSAM-MECO April 2011
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6) ELECTRICAL SPECIFICATIONS :
Accuracy is ± (% reading digits + number of digits)
or otherwise specified, at 23°C ± 5°C & less than
75% relative humidity.
DC Voltage
Range
1)
voltage values.
Input impedance : 10MW, 50pF nominal.
Added range to indicate instantaneous over-range
Resolution Accuracy
6.000V
60.00V ±(0.5% rdg + 5 dgts)
600.0V
1)
600V
TM
AutoCheck DCV
Range Resolution Accuracy
6.000V
60.00V ±(1.3% rdg + 5 dgts)
600.0V
1)
600V
1 mV
10 mV
100 mV
1 V
1 mV
10 mV
100 mV
1 V
1)Added range to indicate instantaneous over-range
voltage values
TM
AutoCheck Lo-Z DCV Threshold:
>+1.0VDC & < -1.0VDC nominal
TM
AutoCheck Lo-Z DCV Input Impedance:
Initially approx. 2.5kW, 200pF nominal,
Impedance increases abruptly within a fraction of a
second as display voltage is above 50V(typical).
Ended up impedances vs display voltages
typically are:
15kW@100V
100kW@300V
250kW@600V

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KUSAM-MECO April 2011
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AC Voltage
Range
1)Added range to indicate instantaneous over-range
voltage values.
Input impedance : 10MW, 50pF nominal.
Resolution Accuracy
6.000V
60.00V ±(1.2% rdg + 5 dgts)
600.0V
1)
600V
1 mV
10 mV
100 mV
1 V
50Hz ~ 400Hz
TM
AutoCheck OHM
Range1) Resolution Accuracy
600.0 W
6.000 KW±(0.5% rdg + 5 dgts)
60.00 KW
600.0 KW
0.1 W
1 W
10 W
100 W
Open Circuit Voltage : 0.45VDC typical
TM
AutoCheck Ohm Threshold : < 10.00MWnominal
1)
6.000 MW
1 KW
60.00 MW
10 KW
±(0.8% rdg + 5 dgts)
±(1.2% rdg + 5 dgts)
±(2.2% rdg + 5 dgts)
CREST-MAX Capture Mode
Accuracy: Specified accuracy plus 250
Digits for changes > 5ms in duration
Audible Continuity Tester
between 10Wand 200W
32ms approx.
Audible Threshold Response Time
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KUSAM-MECO April 2011
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AutoCheck_ACV (with Low Pass Filter)
Range Resolution Accuracy1)
6.000V
60.00V ±(3.0% rdg + 80 dgts)
600.0V
2)
600V
1 mV
10 mV
100 mV
1 V
5Hz ~ 20Hz
6.000V
60.00V ±(2.0% rdg + 50 dgts)
600.0V
2)
600V
1 mV
10 mV
100 mV
1 V
20Hz ~ 200Hz
6.000V
60.00V ±(6% rdg - 80 dgts)
600.0V
2)
600V
1 mV
10 mV
100 mV
1 V
3)
200Hz ~ 420Hz
1)
2)
3)
TM
TM
Not specified for fundamental frequency>420Hz
Added ranges to indicate instantaneous over-range
voltage values
Accuracy linearly decreases from 2%+50d @ 200Hz to
6%+ 80d @420Hz
AutoCheck Lo-Z ACV Threshold : >1V(50/60Hz) nominal
AutoCheck LoZ ACV Input impedance:
Initially approx. 2.5kW, 200pF nominal;
Impedances increases abruptly within a fraction
second as display voltage is above 50V(typical).
Ended up impedances Vs display voltages typically are :
15kW@100V
100kW@300V
250kW@600V

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KUSAM-MECO April 2011
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Capacitance
Range Resolution Accuracy1)
60.00 nF
600.0 nF ±(2.0% rdg + 5 dgts)
6.000 mF
60.00 mF
Accuracies with film capacitor or better
Temperature Coefficient : 0.25 x (specified accuracy)/
°C @(0°C--18°C or 28°C – 40°C)
1)
2)
600.0 mF
2000 mF
±(3.5% rdg + 5 dgts)2)
±(4.0% rdg + 5 dgts)2)
~Hz Line Level Frequency
Accuracy : 0.03% + 4d
1)VFD sensitivity linearly decreases from 10% F.S. @ 200Hz
to 40% F.S. @ 420Hz
Function
6 V
60 V
600 V
VFD 6 V1)
VFD 60 V1)
VFD 600 V1)
Sensitivity
(Sine RMS)
1 V
6 V
60 V
1 V ~ 2 V
6 ~20 V
60 V ~ 200 V
6 A ~ 20 A
60 A ~ 200 A
VFD 60 A1)
VFD 600 A1)
Range
10Hz ~ 1999Hz
10Hz ~ 1999Hz
10Hz ~ 1999Hz
10Hz ~ 420Hz
10Hz ~ 420Hz
20Hz ~ 420Hz
20Hz ~ 420Hz
10Hz ~ 420Hz
Diode Tester
Range Test Current
(Typical)
1.000V 0.56mA <1.8V DC typical
Open Circuit
Voltage
Accuracy : 1.0% + 3d
10 pF
100 pF
1 nF
10 nF
100 nF
1 mF
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KUSAM-MECO April 2011
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ACA Current(Clamp on)
1)2)3)
Accuracy
Resolution
Range
1)Add 12d to specified accuracy while reading is at 1% to
10% of range.
2)Induced error from adjacent current carrying conductor :
<0.5A/A
3)Specified accuracy is from 1% to 100% of range and for
measurements made at the jaw center. When the conductor is
not positioned at the jaw center, position errors introduced are:
Add 1% to specified accuracy for measurements made WITHIN
jaw marking lines (away from jaw opening)
Add 4% to specified accuracy for measurements made beyond
jaw marking lines (toward jaws opening)
±(1.8%rdg + 3dgts)
50Hz – 400Hz
60.00 A
600.0 A
10 mA
100 mA
NON-CONTACT EF-Detection
Typical Voltage
20V (tolerance : 10V ~ 36V)
55V (tolerance : 23V ~ 83V)
110V (tolerance : 59V ~ 165V)
220V (tolerance : 124V ~ 330V)
440V (tolerance : 250V ~ 600V)
Bar-Graph
Indication
-
- -
- - -
- - - -
- - - - -
Indication : Bar-graph segments & audible beep
tones proportional to the field strength
Detection Frequency : 50/60Hz
Detection Antenna : Top side of the stationary jaw
Probe-Contact EF-Detection: For more precise
indication of live wires, such as distinguishing
between live and ground connections, use the
Red (+) test probe for direct contact measurement.

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KUSAM-MECO April 2011
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8) MEASUREMENT PROCEDURE
CAUTION: Before and after hazardous voltage
measurements, test the voltage function on a
known source such as line voltage to determine
proper meter functioning.
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
220.8
V
60.0
Hz
V
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
3.082
V
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
206.3
A
60.2
Hz
A
Hz
ACV , DCV functions
Set slide-switch to Voltage function position(s).
Inputs are made through the test leads terminals.
Press SELECT button momentarily toggles to
DCV function.
Hz
Set the slide-switch to select ACA function. Input
is made through the clamp jaws for non-invasive
current measurements.
Hz
ACA function
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KUSAM-MECO April 2011
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7) PRODUCT DESCRIPTION
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
0.000
V
1
2
3
3
4
5
7
8
9
10
6
1) Transformer
Clamp Jaw for AC
current magnetic
field pick up
2) Head/Finger Barrier
to indicate the limits
of safe access of the
meter during
measurement.
3) Push-buttons for
special functions &
features
4) Input Jack for all
functions EXCEPT
non- invasive ACA
current function.
5) Common (Ground
reference)Input Jack
for all functions
Except non-invasive
ACA current function.
6) Slide switch Selector to turn the power ON /OFF
and Select a function
7) 3-5/6 digits 6000 counts & 3-1/2 digits
2000 counts dual numeric LCD display
8) Jaw trigger for opening the transformer clamp
jaw.
9) Jaw center Indicators, at where best ACA
accuracy is specified
10) Jaw marking lines for ACA position error
indication

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KUSAM-MECO April 2011
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Note: The Hz trigger level is determined by the
ACV or ACA function-range being in use.
Press RANGE button to select different
function-ranges and thus trigger levels
manually.
For non-invasive ACA current measurements,
press the Jaw trigger and clamp the Jaws around
only one single conductor of a circuit for load
current measurement. Make sure the jaws are
completely closed, or else it will introduce
measurement errors. Enclosing more than one
conductor of a circuit will result in differential
current (like identifying leakage current)
measurement. Locate the conductor (s) at the
Jaws center as much as possible to get the best
measuring accuracy. For removal, press the jaw
trigger and remove the jaws from the conductor(s).
CAUTION (Application and removal of the
Clamp-on meter)
Adjacent current-carrying devices such as trans-
formers, motors and conductor wires will affect
measurement accuracy. Keep the jaws away from
them as much as possible to minimize influence.
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KUSAM-MECO April 2011
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CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
Auto
VW
LoZ
LoZ
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
60.18
V
128.8
Hz
LoZ
LoZ
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
3.802
V
LoZ
LoZ
CREST C
HOLD H
EF
REL
PC-Comm
VFD
RANGE
Hz Hz
VFD
Auto
VW
2.008
k
W
TM
AutoCheck Mode