Kusam-meco KM 2720 User manual

An ISO 9001:2008 Company
®
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022 -24156638, Tel. : [phone], Fax : 022 - 24149659
Email : [email protected], Website : www.kusamelectrical.com
An ISO 9001:2008 Company
®
All Specifications are subject to change without prior notice
Chhaya Computer/D:/Chhaya/Coreldraw Files/New catlogs Dec 2011/KM 2720-KM 2725.cdr
3¾ DIGITS AC/DC AUTORANGING
DIGITAL CLAMPMETER
Model - KM 2720 - 17 FUNCTIONS 27 RANGES
KM 2725 - 17 FUNCTIONS 27 RANGES
KM2720 KM2725
SPECIAL FEATURES :
?High Resolution DCA/ACAof 1mA
?Auto Polarity display
?Auto ZeroAdjustment
?Display annunciators for all functions & ranges
?Continuity & Diode Measurements
?Auto Power Off
?Low Battery Indication
ACCESSORIES :
Test leads, Carrying Case, Battery installed, User's Manual
ïSensing : Average sensing
ïJaw Size : 23 mm
ïDisplay : 3¾ digits 4000 counts LCD display
ïSampling rate : 2.5 reading / sec.
ïLow Battery : “ ” mark is displayed when
the Battery Voltage drops below 2.4V
ïOver range indication : Display “OL” or “-OL”
GENERAL SPECIFICATIONS :
ïOperating Temperature : 0°C~50°C; £ 75% R.H.
ïStorage Temperature : -20°C to 60°C; £80% R.H.
(Without battery)
ïPower Supply : 1.5VAAA battery x 2
ïDimension : 183(L) X 43(W) X 31(H) mm
ïWeight : Approx. 200 gm (battery included)
ELECTRICAL SPECIFICATIONS- KM2720 / KM2725
Accuracy is ± (% reading digits + number of digits ) or otherwise specified, at 23°C ± 5°C & less than 75% R.H.
400 W100 mW
4 kW
1 W
40 kW10 W
400 kW100 W
RESISTANCE
±(1.0%rdg + 2dgts)
Accuracy
Overload Protection : 250V rms
Range Resolution
1 kW
4 MW
40 MW10 kW
±(1.0%rdg + 2dgts)
±(1.0%rdg + 2dgts)
±(1.0%rdg + 2dgts)
±(1.0%rdg + 2dgts)
±(1.5%rdg + 2dgts)
Range
DIODE TEST
Description
Display read approx. Forward
Voltage of diode.
Accuracy : ±(3.0%rdg + 3dgts)
Range
CONTINUITY TEST
If the resistance is less than
100W, the beeper sounds
continuously
Description
Range
40 A 10 mA
±(2.0%rdg + 3dgts)
200 A 100 mA ±(2.5%rdg + 3dgts)
AC/DC CURRENT (Model KM 2720)
Accuracy (ACA)
Resolution
±(2.0%rdg + 2dgts)
±(2.5%rdg + 2dgts)
Accuracy (DCA)
AC/DC CURRENT (Model KM 2725)
±(3.0%rdg + 3dgts)
±(2.0%rdg + 3dgts)
Accuracy (ACA)
1 mA
10 mA
Resolution
Range
4 A
40 A
±(3.0%rdg + 2dgts)
±(2.0%rdg ± 2dgts)
Accuracy (DCA)
Range
40 nF 10 pF ±(2.5%rdg + 10dgts)
400 nF 100 pF ±(2.0%rdg + 4dgts)
CAPACITANCE
Accuracy
Resolution
4 mF
40 mF
1 nF
10 nF
±(2.0%rdg + 4dgts)
±(2.5%rdg + 4dgts)
Overload Protection : 250V rms
400 mV 100 mV
4 V 1 mV
40 V 10 mV
400 V 100 mV
AC VOLTAGE
±(1.8%rdg + 5dgts)
±(1.5%rdg + 3dgts)
Accuracy
Input Impedance : 10MW
AC Voltage Test Frequency : 50Hz~500Hz for 400V & below,
& 50Hz~100Hz for above 400V.
Overload Protection : DC 1000V orAC 750V rms
Range Resolution
750 V 1 V
±(1.0%rdg + 3dgts)
±(1.0%rdg + 3dgts)
±(1.0%rdg + 3dgts)
400 mV 100 mV
4 V 1 mV
40 V 10 mV
400 V 100 mV
DC VOLTAGE
±(1.0%rdg + 2dgts)
Accuracy
Input Impedance : 10MW
Overload Protection : DC 1000V orAC 750V rms
Range Resolution
1000 V 1 V
±(0.8%rdg + 2dgts)
±(0.8%rdg + 2dgts)
±(0.8%rdg + 2dgts)
±(0.8%rdg + 2dgts)
Range
9.999 Hz Unspecified
99.99 Hz ~ 9.999 MHz
FREQUENCY
Accuracy
±(0.2%rdg + 3dgts)
Sensitivity : Frequency - 0.7VAC rms;
Voltage - 0.1V AC rms
Overload Protection : 250V rms
Range
DUTY CYCLE
Sensitivity
Resolution
0.1%~99.9%
Overload Protection : 250V rms
0.1%
Frequency - 0.7VAC rms
Voltage - 0.1V AC rms

17, Bharat Industrial Estate, T. J. Road, Sewree (W),
Mumbai-400015. INDIA
Sales Direct: 24156638 Tel.:[phone] Fax:[phone]
E-mail : [email protected], Website : www.kusamelectrical.com
www.kusam-meco.co.in
Digital Multimeter
Digital AC & AC/DC Clampmeter
AC Clamp Adaptor
AC/DC Current Adaptor
Transistorised Electronic Analog & Digital
Insulation Resistance Testers
Digital Sound Level Meter & Sound Level
Calibrator
Digital contact & Non-contact Type
Tachometer
Digital Non-contact (infrared) Thermometer
Thermo Hygrometer
Thermo Anemometer
Wood Moisture Meter
Distance Meter
Digital Hand Held Temperature Indicators
Digital Lux Meter
Network Cable Tester
Power Factor Regulator
Maximum Demand Controller/Digital Power
Meter
LIST OF PRODUCTS
*
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*
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OPERATION
MANUAL
AUTORANGING
CLAMPMETER
KM 2720 / KM 2725

13
AUTORANGING
CLAMPMETER
KM 2720 / KM 2725
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 : kusam-meco.co.in, kusamelectrical.com
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.

12
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 first.
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
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 guarantee 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, 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.

TABLE OF CONTENTS
TITLE PAGE
Safety.......................................................1
General Features.....................................2
Electrical Specifications.......................... 3
DC/AC Current
DC/AC Voltage
Frequency & Duty
Resistance
Diode & Continuity
Capacitance
Push button...............................................5
Measurement............................................6
DC/AC Current Measurement
DC/AC Voltage Measurement
Frequency & Duty Cycle Measurement
Resistance Measurement
Diode & Continuity Test
Capacitance Measurement
Auto Power Off
Maintenance..............................................9
Battery Replacement............................... 10
Fuse Replacement...................................10
Test Certificate........................................ 11
Warranty.................................................. 13
11
MUMBAI
TEST CERTIFICATE
AUTORANGING CLAMPMETER
This Test Certificate guarantees 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. ___________
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO

GENERAL INSTRUCTION
The KM 2720 / KM 2725 is a handhold digital clamp
meter with auto range & auto power off functions. It
can test the AC/DC Current & Voltage, Frequency,
Resistance, Diode, etc. It is ideal instrument for use
in many fields, such as industry, scientific, training and
electric department.
1) SAFETY INFORMATION
The following safety information must be observed to
insure maximum personal safety during the operation
at this meter:
1.1 Do not use the meter if it looks damaged.
Inspect the leads for damaged insulation or
exposed metal, check test lead continuity, and
replace the damaged leads.
1.2 Do not measure with high voltage (above DC
1000V or AC 750V).
1.3 Be cautions when working at DC60V or AC30V,
such voltage may cause a shock hazard.
1.4 When making measurements, keep your finger
behind the guard’s plant on the probes for safety.
110
The meter is powered by two 1.5V, R6 Um3 AA
SIZE carbon zinc or alkaline battery, Replace
battery if the low battery sign “ ” is displayed.
1. Set the rotary switch to “OFF” position.
2. Loosen screws on bottom cover, pull up and
move the cover.
3. Replace the defective battery.
4. Reverse the procedure of opening cover to
close the bottom cover.
6.2 Battery Replacement
1. Perform steps 1 to 2 of battery replacement
procedure.
2. Replace the defective fuse and use same
size and rating install in the fuse holder.
3. Reverse the procedure of opening cover to
close the bottom cover.
6.3 Fuse Replacement

92
2. GENERAL FEATURES
Display : 3 ¾ digits LCD display with
3999 counts.
Over range indication : Display “OL” or “-OL”
Auto Function : Auto range, Auto power
off, Auto polarity display,
Auto zero adjustment,
Auto units display.
Reading Rate : 2.5 reading / Sec.
Low battery indication : “ ” mark is displayed
when the battery voltage
drops below 2.4V.
Operating Temperature : 0°C to 50°C, £70%RH
Storage Temperature : -20°C to 60°C, £80%RH
(Without Batery)
Power supply : R6 Um3 “AA” 1.5V x 2
Dimension : 183(L) x 43(W) x 31(H)mm
Weight : Approx. 200g
(including Battery)
6. Maintenance
The meter is a precis product. Please do not
promiscuously change the circuit or regulation-
resistance. And pay attention to following :
1. Do not use the Resistance, Diode, Transistor
or Current range to test Voltage.
2. Only replace the battery or Fuse when remove
the probe and power off.
3. Avoid damp, high temperature, greasy dirt
and strong magnetic field when storage.
4. Please power off the meter when not using.
Take out of the battery if it is not used for a long
time.
To avoid electrical shock or damage the meter’
do not get water inside the case. If the meter
fails to operate, check battery, test leads, fuse,
etc., And replace them if necessary. If the meter
still does not work, double check operating
procedure as described in this manual.
WARNING
6.1 Maintenance

38
3. ELECTRICAL SPECIFICATIONS
AC CURRENT (Model KM 2720)
200A
40A
Range Resolution Accuracy
± 2.5%rdg ± 0.3
± 2.0%rdg ± 0.03
5.6 Capacitance measurement
1. Set the rotary switch to “CAP” position.
Touch the probes to tested capacitor and get
reading.
2. Connect the black test lead to “COM”
terminal and red test lead to “V W” terminal.
NOTE : When testing the large capacitor, please
discharge the capacitor first by short
circuit. This meter use charge method to
test the capacitor, so it will take long time
to get the rading if testing the large
capacitor.
5.7 Auto power off
When the meter is auto switch off, it will be awaken to
work state by turning the function switch or pressing
any button.
DC CURRENT (Model KM 2720)
± 2.5%rdg ± 0.2
± 2.0%rdg ± 0.02
200A
40A
Range Resolution Accuracy
AC CURRENT (Model KM 2725)
40A
4A
Range Resolution Accuracy
± 2.0%rdg ± 3d
± 2.0%rdg ± 3d
DC CURRENT (Model KM 2725)
Range Resolution Accuracy
0.01A
0.1A
0.01A
0.1A
0.01A
0.001A
40A
4A
± 2.0%rdg ± 2d
± 2.0%rdg ± 2d
0.01A
0.001A
400 mV
4 V
40 V
400 V
Range
AC VOLTAGE(Model KM 2720 & KM 2725)
AC Accuracy
± 1.8%rdg ±5d
750 V
± 1.0%rdg ±3d
± 1.5%rdg ±3d
Note : Input Resistance : 10MW.
AC Voltage test Frequency : 50Hz ~ 500Hz for
400V and below, 50Hz~100Hz for above.
Over load protect : DC 1000V or AC 750V RMS.
³
Resolution
To avoid damage to the meter or to the equipment
under test, Disconnect circuit power and discharge
all high-voltage capacitance before measuring
Diode or Continuity.
5.5 Diode and Continuity Test
CAUTION
1. Set the rotary switch to “ ” position.
2. Press to select “ ” or “ ” test mode.
3. Connect the black test lead to “COM”
terminal and the red test lead to “V W”
terminal.
4. Touch the probes to the two ends of diode.
For diode, a good diode should display a
forward-bisa reading of 0.3V to 0.8V.
However, the reverse-bisa reading will be
over range and appears “OL” on display. A
shorted circuit diode reading is near 0V, open
circuit diode appears “OL” in both directions.
For continuity, if the test points resistance
below 100W, the beeper sounds.
± 1.0%rdg ±3d
± 1.0%rdg ±3d
0.1 mV
1 mV
10 mV
0.1 V
1 V

74
To avoid damage to the meter or to the equipment
under test, disconnect circuit power and discharge
all high-voltage capacitance before measuring
resistance.
5.4 Resistance Measurement
CAUTION
1. Set the rotary switch to “W” position.
2. Connect the black test lead to “COM”
terminal and the red test lead to “VW” terminal.
3. Touch the probes to test points or resistance
and get reading.
400 mV
4 V
40 V
400 V
Range
DC VOLTAGE(Model KM 2720 & KM 2725)
Accuracy
± 0.8%rdg ± 2
1000 V
± 1.0%rdg ± 2
Note : Input Resistance : 10MW.
AC Voltage test Frequency : 50Hz ~ 500Hz for
400V and below, 50Hz~100Hz for above.
Over load protect : DC 1000V or AC 750V RMS.
³
Resolution
9.999Hz
99.99Hz-9.999MHz
Range
FREQUENCY AND DUTY CYCLE RANGE
(Model KM 2720 & KM 2725)
Accuracy Sensitivity
Frequency:
0.7V AC RMS
Voltage :
0.1V AC RMS
± 0.2%rdg ± 3
DUTY Range : 0.1% to 99.9%
Unspecified
Note : Overload Protection : 250V RMS
Range
RESISTANCE
Accuracy
± 1.0%rdg ±2d
Note : Overload Protection : 250V RMS
400 W
4 kW
40 kW
400 kW
4 MW
40 MW± 1.5%rdg ±2d
± 1.0%rdg ±2d
± 1.0%rdg ±2d
± 1.0%rdg ±2d
± 1.0%rdg ±2d
5.3 Frequency and duty cycle Measurement
1. Set the rotary switch to “Hz” position. Touch
the probes to signal source and get reading.
2. Connect the black test lead to “COM”
terminal and the red test lead to “VW”
terminal.
3. Press REL/SELECT to select Hz or DUTY
test mode.
5.2 DC/AC Voltage Measurement
1. Set the rotary switch to “V” position. Press
REL/SELECT button to select DC or AC
mode according to test voltage.
2. Connect the black test lead to “COM”
terminal and the red test lead to “VW”
terminal.
3. Touch the probes to the test points and get
reading.
Resolution
0.1 W
1 W
10 W
100 W
1 kW
10 kW
0.1 mV
1 mV
10 mV
0.1 V
1 V
± 0.8%rdg ± 2
± 0.8%rdg ± 2
± 0.8%rdg ± 2

56
4. PUSH BUTTON
4.1 REL/SELECT BUTTON
Press REL to automatic zero adjustment.
Press SELECT to select DC or AC and
or mode.
4.2 RANGE BUTTON
Press this button to enter the manual range
mode.
Press RANGE more than 2 seconds, return
to auto range mode (except for Frequency
range).
4.3 HOLD BUTTON
Press this button to enter data hold mode.
To avoid damage to the meter or injury if the
fuse blows, never attempt to make an in-
circuit current measurement where the open-
circuit potential to earth is greater than 1000V.
To avoid damage to the meter, check the
meter’s fuses before proceeding. Use the
proper terminals, function,and range for your
measurement. Never place the probes in
Parallel with a circuit or component when
the test leads are plugged into the current
terminals.
5.MEASUREMENT
5.1DC/AC Current Measurement
WARNING
1. Set the rotary switch to AC or DC 40A &
200A position. Then press REL/SELECT to
auto adjust zero.(KM 2720)
2. Set the rotary switch to AC or DC 4A &
40A position. Then press REL/SELECT to
auto adjust zero.(KM 2725)
3. Open the jaw and clamp on the wire under
testing and get reading.
Node : Test one wire each time.
4. If you want to keep the test data, press the
HOLD button and get reading.
Range
CAPACITANCE (Model KM 2720 & KM 2725)
Accuracy
± 2.5%rdg ±10d
Note : Overload Protection : 250V RMS
40 nF
± 2.0%rdg ± 4d
400 nF
4 mF
40 mF± 2.5%rdg ± 4d
Range
DIODE & CONTINUITY TEST
Description
Display read approx. Forward voltage of
diode. Accuracy : ±(3.0%rdg + 3)
If the resistance is less than 100W, the
beeper sounds continuously
(Model KM 2720 & KM 2725)
Resolution
± 2.0%rdg ± 4d
100 pF
10 nF
10 pF
1 nF