Kusam-meco KM 2780 User manual

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
All Specifications are subject to change without prior notice
GENERAL SPECIFICATIONS :
Preliminary Data
CAPACITANCE
Range
Overload Protection : 250Vrms.
Accuracy
Resolution
50Hz ~ 60Hz
40 nF ± (2.5%rdg + 10dgts) 0.01 nF
400 nF
± (2.0%rdg + 4dgts)
0.1 nF
4 mF1 nF
40 mF10 nF
100 mFUnspecified
100 nF
FREQUENCY
Range
Overload Protection : 250Vrms. Sensitivity : 1V
Accuracy
Resolution
10 Hz Unspecified
0.001Hz
100 Hz
± (0.5%rdg + 3dgts)
0.01Hz
1 KHz 0.1Hz
10 KHz 1Hz
100 KHz
1 MHz
10Hz
100Hz
10 MHz 1KHz Unspecified
®
An ISO 9001:2008 Company
MODEL KM 2780
ACCESSORIES : Test leads set, Users Manual, Battery & Carrying Case.
®
An ISO 9001:2008 Company
Chhaya com/D/chhaya/my documents/chhaya/backup/catlog/New catlog/2015 new arrival catalogs/KM 2780.cdr
1000A AC DIGITAL CLAMPMETER
ELECTRICAL SPECIFICATIONS : KM 2780
— Display : 3 ¾ digits LCD,3999 counts max.
● Jaw size : Φ40mm
— Overload protection : LCD will show a “OL”
in the highest position accompanied. (Except
for ranges of 1000A AC, & 1000VDC or 750VAC)
— Measurement Categories III
— Pollution Degree 2
— Altitude upto 2000 meters
● Sampling rate : 2.5 times/sec (Digital display)
● Polarity : Automatic polarity “-” display for
negative input.
— Operating Temperature & Humidity :
0 ~ 40°C (R.H. <80% noncondensing)
— Storage Temperature & Humidity :
-10°C ~ 60°C (R.H. <80% noncondensing)
● Low Battery Indication.
● Auto Power Off.
● Diode & Continuity test
● Power Supply : 1.5V x 2 AAA Battery.
● Dimension : 228(L) x 75(W) x 36(H)mm.
● Weight : Approx. 465g. (including Battery)
AC CURRENT
Range Accuracy
Resolution
Overload Protection : 1100A
40 A
400 A
1000 A
0.01A
± (2%rdg + 5dgts)
0.1A
1 A
40Hz ~ 65Hz
DCmV VOLTAGE
Range
Overload Protection : 1000Vrms Input Impedance : 1MW
Accuracy
Resolution
400 mV ± (1.0%rdg + 2dgts)
0.1 mV
DC VOLTAGE
Range
Overload Protection : 1000Vrms Input Impedance : 10MW
Accuracy
Resolution
4 V 0.001 V
40 V 0.01 V
400 V
± (0.8%rdg + 2dgts)
0.1 V
1000 V ± (1.0%rdg + 2dgts)
1 V
AC VOLTAGE
Range Accuracy
Resolution
4 V 1 mV
40 V 0.01 V
400 V
± (1.0%rdg + 5dgts)
0.1 V
Overload Protection : 820Vrms
Input Impedance : 10MW
750 V ± (1.5%rdg + 5dgts)
1 V
400 mV ± (1.8%rdg + 5dgts)
0.1 mV
40Hz ~ 450Hz
40Hz ~ 100Hz
RESISTANCE
Range
Overload Protection : 250Vrms.
Accuracy
Resolution
400 W± (1.2%rdg + 5dgts)
0.1 W
4 KW
± (1.0%rdg + 2dgts)
1 W
40 KW10 W
400 KW100 W
4 MW
40 MW
1 KW
10 KW± (2.0%rdg + 5dgts)
DIODE / AUDIBLE CONTINUITY
Display read approx.
Forward voltage of diode.
Accuracy :
± (3.0%rdg + 3dgts)
Range Description
If the resistance is less
than 50W, the beeper
sounds continuously.
Note : Overload protection : 250V rms
DUTY CYCLE
Range
0.1% to 99.9%

®
®®
AN ISO 9001:2015 COMPANY
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
®
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
DIGITAL CLAMPMETER
MODEL - KM 2780

®
I .SAFETY INFORMATION
• Read the following safety information carefully before
attempting to operate or service the meter.
• To avoid damages to the instrument, do not exceed the
maximum limits of the input values shown in the technical
specification tables.
• Never measure current while the test leads are inserted
into the input jacks.
• Do not use the meter or test leads if they lock damaged.
Use with extreme caution when working around bare
conductors or bus bars.
• Accidental contact with the conductor could result in
electric shock.
• Use the meter only as specified in this manual; otherwise,
the protection provided by the meter may be impaired.
• Read the operating instructions before use and follow all
safety information.
• Be cautious when working with voltages above 6OVDc or
3OVAc RMS. Such voltages pose a shock hazard.
• Before taking resistance measurements or testing
acoustic continuity, disconnect circuit from main power
supply and all loads from circuit.
Safety symbols
01
Dangerous voltages.
*I
Caution refers to this manual before using the / \ meter.
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®
02
Meter is protected throughout by double insulation or
reinforced insulation.
When servicing, use only specified replacement parts.
Comply with EN-61010-1,IEC 1010-2-032
II. TECHNICAL SPECIFICATIONS
2-1 Genera/ Specifications
Environment conditions:
 Mesurement Categories III
‚ Pollution Degree 2
ƒ Altitude up to 2000 meters
„ indoor use only
… Relatively humidity 80% max.
† Operation Ambient 0~40°C
Maintenance & Clearing :
 Repairs or servicing not covered in this manual should
only be performed by qualified personnel.
‚ Periodically wipe the case with a dry cloth. Do not use
abrasives or solvents on this instrument.
Maximum Voltage between any terminal and earth
ground
750 Vrms
Operating Principle
Dual slope integration
®
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
FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING
FROM ANY CAUSE WHATSOEVER.
All transaction are subject to Mumbai Jurisdiction.
15

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03
Display
3 3/4 digits liquid crystal display (LCD) Max. Reading
3999. Automatic indication of functions and symbols.
Over Range Indication
LCD will show a " OL " in the highest position accompanied.
(Except for ranges of 1000AAC, and 1000VDc or 750VAc)
Low Battery Indication
The is displayed when the battery voltage drops below the
operating voltage.
Sampling Rate
2.5 times/sec (Digital Display)
Battery Life
60hrs approx (Alkaline)
Polarity
Automatic polarity " - "display for negative input.
Jaw Opening Diameter
Cables 040 mm.
Auto power off
The meter is powered off 15 minutes later after the last
operating was made. To bring back the display, please turn
rotary switch to more positions or push any button.
Operating Temperature and Humidity
0°C to 40°C (R.H.<80% noncondensing)
Storage Temperature and Humidity
-10°C to 60`C (R.H.<80% noncondensing).
Dimensions : 228(L) X 75(W) X 36(H)mm
®
TEST CERTIFICATE
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 - 2780
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO
DIGITAL AC CLAMP METER
14

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04
Weight : 465 g. approx. (batteries included).
Accessories
Battery (two AAA 1.5V) instruction manual, Test leads,
Carry bag, Gift box.
2-2 Measurement Specifications
Accuracy are: ±(% of reading + number of digits) at 18°C
to 28°C (64°F to 82°F) with relative humidity to 80%.
The current error is specified within the largest circle, which
can be drawn inside the jaw.
· AC Current
Range
Range
Resolution Accuracy
Accuracy
Overload
protection
Overload
protection
Frequency
Response
40A 0.01A
400A 0.1A ±(2%-5) 1100A 40-65Hz
1000A 1A
· DCmV Voltage
Input
Impedance
400mV ±(1.0%+2) 1MW1100Vrms
· DC Voltage
Input
Impedance
Range Resolution Accuracy Overload
protection
4V 0.001V
40V 0.01V ±(0.8%+2)
400V 0.1V
10MW1100Vrms
1000V 1V ±(1.0%+2)
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13
I V. MAINTENANCE
5-1 Battery Replacement
WARNING
WARNING
To prevent electrical hazard or shock, turn off clamp
meter and disconnect test leads before removing
back cover.
· As battery power is not sufficient, LCD will display.
Replacement with two new batteries
· type AAA is required.
· Set Range Switch to OFF position.
· Use a screwdriver to unscrew the screw secured on back
cover. Take out the batteries and replace with two new
batteries Type AAA.
· Place back the cover and secure by a screw.
5-2 MAINTENANCE WARNING
To avoid electrical shock or damage to the meter,
do not get water inside the case. Remove the test
leads and any input signals before opening the case.
Periodically wipe the case with a damp cloth and mild detergent.
Do not use abrasives or solvents.

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05
· AC Voltage
Frequency Response : 40Hz-450Hz for 400V and below,
40Hz-100Hz for 750V
· Resistance(W)
400W0.1W±(1.2%+5)
4KW1W
40KW10W±(1.0%+2) 250Vrms
400KW100W
4MW1KW
40MW10KW±(2.0%+5)
Range Resolution Accuracy Overload protection
· Diode/Audible continuity
Range Description
Display read approx. Forward voltage of diode.
Accuracy:±(3.0%rdg+3).
If the resistance is less than 50W, the beeper
sounds continuously
Note: Overload protect: 250V RMS
Input
Impedance
Range Resolution Accuracy Overload
protection
10MW
400mV 0.1mV ±(1.8%+5)
4V 1mV
40V 0.01V +(1 0%+5) 820Vrms
400V 0.1V
750V 1V ±(1.5%+5)
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12
· Remove power from the circuit being tested and
discharge all capacitors.
· Connect the resistance in the circuit being measured.
· When the resistance is below 400, it will indicate by a
continuous beeping.
NOTE: Continuity test is available to check open/short
of the circuit.
4-8 Capacitance measurement
CAUTION
To avoid damage to the meter or to the equipment
under test, disconnect circuit power and discharge
all high-voltage.
Disconnect before measuring capacitance. Use the
DC voltage function to confirm that the capacitor is
discharged.
· Set the function switch to "CAP" position.
· Connect the black test lead to "COM" terminal and red
test lead to "V n Hz" terminal.
· Touch the probes to test point, if the capacitor is a
polarity, the red test lead to position leg and black test
lead to minus leg.
4-9 Frequency Measurements
According to applications, both the ammeter and the
voltmeter can be used.
· Set the function switch to the Hz range.
· The Voltmeter detects the frequency of the voltage applied
to the leads.
· Read the frequency value on the display.

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06
· Capacitance
Accuracy
(50Hz-60Hz)
40nF 0.01 nF ±(2.5%+10)
400nF 0.1 nF
± (2.0°/0+4)
4mF1 nF
40mF 10 nF
100 nF100mFUnspecified
250Vrms
Range Resolution Overload protection
· Frequency (Hz) and Duty
Sensitivity
10Hz 0.001Hz Unspecified
1V 250Vrms
100Hz 0.01 Hz
±(0.5%+3)
1KHz 0.1Hz
10KHz 1Hz
100KHz 10Hz
1MHz 100Hz
10MHz 1KHz Unspecified
DUTY Range: 0.1% to 99.9%
Range Resolution Accuracy Overload
protection
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11
1. Before taking resistance measurements, make sure the
circuit is not live and discharge any capacitors present in
the circuit.
2. Set the function switch to W range.
3. Connect the black test lead to the COM terminal and the
red test lead to the + terminal.
4. Connect the test leads to the circuit being measured and
read the displayed value.
4-7 Diode test / Continuity Measurement
WARNING
Before taking any in circuit resistance
measurement, remove power from the circuit
being tested and discharge all capacitors.
(I) Diodes test
1. Connect red test lead to the "+" terminal and black test
lead to the "COM" terminal.
2. Set range switch to the diode test position " ".
3. Connect the red test to the anode side and black test
lead to the cathode side of the diode being tested.
4. Read forward voltage (V ) value on LCD.
f
If the test lead is connected rather than procedure (3),
the digital reading should nearly equal to the reading in
the open circuit condition. This can be used for
distinguishing anode and cathode poles of a diode.
(II) CONTINUITY MEASUREMENT
1. Connect red test lead to the "+" terminal and black test
lead to the "COM" terminal.
2. Set range switch to the " .})) " position.

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07
III. PARTS & CONTROLS
3-1 Description of Parts 8 Contral
 Sensor (current transformer) jaws
Pick up the current flowing through the conductor.
‚ jaw opening trigger
ƒ LCD display
3 3/4 digital LCD with indications for measurement
values, unit symbol, decimal point, polarity and low
battery etc.
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10
4-4 DC Voltage Measurements
WARNING
Maximum input voltage of DC VOLT Range is
1100VD or 760Vrms. Do not attempt to take any
c
voltage measurement that exceeds 760Vrms to
avoid electrical shock hazard or damage to the
instrument.
1. Set the function switch to the V range.
2. Connect the black and red test leads to the COM and
+ terminals respectively.
3. Connect the test leads to the circuit being measured and
read the displayed value.
4-5 AC Voltage Measurements
WARNING
WARNING
Maximum input voltage of AC VOLT Range is
600Vrms. DO not attempt to take any voltage
measurement that exceeds 760Vrms to avoid
electrical shock hazard of damage to the
instrument.
1. Set the function/range switch to the ~V range.
2. Connect the black and red test leads to the COM and
+ terminals respectively.
3. Connect the test leads to the circuit being measured
and read the displayed value.
4-6 Resistance Measurement
Before taking any in circuit resistance
measurement, remove power from the circuit
being tested and discharge all capacitors.

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08
m SELECT or Hz/DUTY button
When switch at W test position, press this button to select or
mode. When switch at DCV, ACV test position, press this button
to select V or Hz or DUTY mode.
When switch at Hz test position, press this button to select Hz or
DUTY mode.
W
n Data Hold button
Press it once to hold the measured value and store the
value in memory. Press again to release the hold function.
o Rotary switch
For selecting of desired range, and awakening from
auto-power off mode.
p COM socket
Connect to negative lead (black test lead) for voltage,
frequency, resistance, capacitance, continuity, and diode
measurement.
q “+" socket
Connect to positive lead (red test lead) for voltage,
frequency, resistance, capacitance, continuity, and diode
measurement.
r RANGE button
When switch at DCV, ACV or Q position, press this
button to enter the manual range mode. Keep this
button for more than 2 seconds, return to auto-range
state.
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09
IV .OPERATING INSTRUCTION
4-1Measurement Procedure operating instructions
1) Make sure that the selected range is suitable for the
measurement to be taken.
2) If the current under measurement is higher than the
selected value for a long period, overheating may take
place, compromising the safety and operation of inner
circuits.
3) Do not measure currents on high voltage conductors
(>1000VDC or 750VAC) to avoid risks of discharge
and/or incorrect readings.
4-2 AC Current measurements
WARNING
Make certain that all test leads are disconnected
from the meter terminals.
1. Set the function/range switch to the A range.(40 — A .
400—A or 1000—A)
2. Clamp the sensor jaw around one of the conductors
under test. Make sure that the clamp jaw be perfectly
closed.
3. Read the displayed value.
4-3 DCmV Voltage Measurements
1. Set the function switch to the DCmV range.
2. Connect the black and red test leads to the COM and +
terminals respectively.
3. Connect the test leads to the circuit being measured and
read the displayed value