Kusam-meco KM 2782 User manual

DIGITAL DUAL DISPLAY
AC/DC CLAMP METER
MODEL-
KM 2782 / 2782-T
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
mV
AUTO
-004.0
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
KM 2782
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

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
Safety Information ...................................... 01
General Specifications................................ 03
Electrical Specifications...............................04
Product Description.....................................08
Measurement instruction.............................10
Care and Maintenance ...............................22
Battery Replacement ..................................23
Test Certificate............................................ 2 4
Warranty .....................................................25

1. SAFETY INFORMATION
The following safety information must be observed
to insure maximum personal safety during the
operation of this meter.
1. When measuring voltage ensure that instrument
is not switched to the current range, resistance
range, diode and continuity range, capacitance
range of temperature range.
2. Use extreme care when measuring voltage
above 50V. Especially from sources where
high energy is existed.
3. Avoid making connections to “live” circuits
whenever possible.
4. Before making resistance measurements,
diode or continuity test, capacitance test or
temperature test, ensure that the circuit under
test is de-energized.
5. Always ensure that the correct function and
range is selected.
6. Extreme care should be taken when using the
instrument to conjunction with a current
transformer connected to the terminals if an
open circuit occurs.
7. Ensure that the test leads and probes are
in good condition with no damage to the
insulation.
01 02
8. Take care not to exceed the maximum limits as
given in the specifications to avoid damage to
the instrument.
9. Before opening the cover of the battery
cabinet to replace batteries. Disconnect the
test leads from any external circuit, set the
selector switch to “OFF” position.
10. Keep the fingers behind the protection
ring when measuring through the
instrument test lead.
11. Change the battery when the symbol “ ”
appears to avoid incorrect data.
12. Do not use the meter in any environmental
conditions beyond those specified in the
manual.

2. GENERAL SPECIFICATIONS
?Display : 3¾ digit LCD with a max. reading
of 3999 (4000 Counts)
?Auto / Manual Range Selection
?Polarity : Automatic negative polarity indication
?Zero adjustment : Automatic
?Over range indication : “OL” is displayed.
?Low battery : The “ ” is display when the
battery voltage is below 7.2V.
?Auto Power Off : 30 minutes after non usage
of switch / buttons. Press any button or move
the switch,to disable auto power off.
?Safety standards : The meter meets the
Standards of IEC1010 Double Insulation.
?Pollution Degree : 2
?Over Voltage Category II
?Clamp opening Size: 45mm
?Operating Environment :
Temp. 0 ~ 50°C, humidity <80% R.H.
?Storage Environment :
Temp. -20 ~ 60°C, humidity <90% R.H.
?Power Supply : 9V standard battery.
?Dimension : 225(H) x 77(W) x 45(D) mm
?Weight : Approx. 330g (including batteries)
03 04
3. ELECTRICAL SPECIFICATIONS
Accuracies are ± (% of reading + number of
digits ) at 23 ± 5°C, £70%RH.
DC Voltage
Accuracy
±(0.8%rdg + 5dgts)
±(1.0%rdg + 5dgts)
±(1.5%rdg + 5 dgts)
DC Current
200A
0~800
800~1000
±(3.0%rdg+10dgts)
0.1A
1A
Overload protection: 1000Arms within 60 seconds
±(3.5%rdg+10dgts)
±(6.5%rdg+10dgts)
1000A
Range
400 mV
4 V
40 V
400 V
1000 V
Resolution
100 mV
1 mV
10 mV
100 mV
1 V
Overload protection : 1000V DC / 750Vrms AC
Impedance : 10MÙ, more than 100MÙon
400mV range
Average sensing, calibrated to rms of sine wave
Overload protection : 1000V DC / 750 Vrms AC;
Input Impedance : 10MW.
Frequency : 50~400Hz for 4V, 40V & 400V ranges.
50~100Hz for 750V range.
AC Voltage (KM 2782)
AccuracyRange Resolution
±(1.5%rdg + 5dgts)
±(2.5%rdg + 5dgts)
4 V
40 V
400 V
750 V
1 mV
10 mV
100 mV
1 V
Range Accuracy Resolution
400 mV 100 mV

05
AC Current (KM 2782)
400A
0~800
800~1000
1000A
±(3.0%rdg + 10dgts)
Accuracy
Range
0.1A
1A
Resolution
±(3.5%rdg + 10dgts)
±(6.5%rdg + 10dgts)
Average sensing, calibrated to rms of sine wave
Overload protection : 1000Arms within 60 seconds
Frequency : 50~400Hz
2.2.5 AC Voltage (True RMS)(KM 2782-T)
Resolution
100 mV
1 mV
10 mV
100 mV
1 V
Range
400 mV
4 V
40 V
400 V
750 V
Accuracy
±(2.0%rdg+15dgts)
±(1.2%rdg+10dgts)
±(1.2%rdg+10dgts)
±(1.0%rdg+10dgts)
±(1.0%rdg+10dgts)
Input impedance : >10MWACV True RMS
Overload Protection : 1000V DCV or ACV peak value
Press “RANGE” button for select ACV 400mV range.
Sensitivity : 40HZ-1kHZ - 400mV range
40HZ-1kHz - 4V range
40HZ-10kHZ - 40V range
40HZ-400HZ - 400V range
40HZ-400HZ - 750V range
AC Current (KM 2782-T)(True RMS)
400A
0~800
800~1000
1000A
±(3.0%rdg + 10dgts)
Accuracy
Range
0.1A
1A
Resolution
±(3.5%rdg + 10dgts)
±(6.5%rdg + 10dgts)
Overload protection : 1000Arms within 60 seconds
Frequency : 50~400Hz
Resistance
Overload protection : 250V DC / 250 Vrms AC
Accuracy
±(1.5%rdg + 15dgts )
±(1.2%rdg + 15dgts)
±(2.5%rdg + 15dgts)
Range
400 Ù
4 kÙ
40 kÙ
400 kÙ
4 MÙ
40 MÙ
Resolution
0.1 Ù
1 Ù
10 Ù
100 Ù
1 kÙ
10 kÙ
Overload protection : 250V DC / 250 Vrms AC
Accuracy
±(6.0%rdg + 10dgts)
±(6.0%rdg + 10dgts)
±(3.5%rdg + 5dgts)
Capacitance
Range
40 nF
400 nF
4 µF
40 µF
100 µF
Resolution
10 PF
100 PF
1 nF
10 nF
100 nF
Frequency
Range
10 Hz
100 Hz
1000 Hz
10 kHz
100 kHz
1000 kHz
10 MHz
Overload protection : 250V DC/250Vrms AC
Sensitivity : Range of input voltage : 1.5V~10V,
if input voltage is over range, need adjust
Resolution
0.01 Hz
0.1 Hz
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
Accuracy
±(1.2%rdg + 10dgts)
±(2.0%rdg + 10dgts)
±(0.8%rdg + 5dgts)
06

07
Temperature (K-type)
Range
Diode and Audible Continuity Test
Range Description
Resolution
1°C
1°C
1°C
Accuracy*
-20~150°C
150~300°C
300~1000°C
Overload protection : 250V DC / 250Vrms AC
* Thermocouple sensor accuracy not included.
1)Temperature probe supplied can measure
upto 250°C
Display read approx.
Forward voltage of
diode
Test Condition
Overload protection : 250V DC/250Vrms AC
Built-in buzzer
sounds if resistance
is less than 70W
Forward DC current
approx. 0.4mA
Reversed DC voltage
approx. 1.5V
Open circuit voltage
approx. 0.5V
±(3°C+2)
±(3.0%rdg +2dgts)
±(3.5%rdg+10dgts)
08
2. PRODUCT DESCRIPTION
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
mV
AUTO
-004.0
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
2
3
4
5
6
1
7
8
1. Rotary Switch : Use this switch to select
functions and ranges.
2. DH>2 sec : In any range press the key
the present display value will be locked and
the “H” symbol will appear, press it again to
exit HOLD and the “H” symbol disappears.
Press “DH>2 sec ” button more than 2 sec.,
the back light will turn on, press it more than
2 seconds again, the back light will turn off.
KM 2782

09
5. Hz / DUTY key :
In Hz range, push the key, you can measure
the duty, push again, go back to Hz
measurement. In voltage range, push it, you
can measure Hz and duty, but the measurement
range will be smaller, and the auto range mode
will change to manual range mode.
6. REL key:
Press the key, the present display value will
be stored in memory, then the new display
value is the difference between input value
& stored data. This function is to be used for
DC Current ranges.
7. LCD Display :
LCD Dual Display, facilitates reading the data.
It helps in taking & viewing measurements even
in dark areas without having to use the hold
function & removing the meter & checking
the reading.
8. T+V Winput jack, COM input jack,
T-input jack
4. RANGE key :
Press the key to select manual mode, press
it again to change the range. Press the key for
more than 2 seconds to go back to auto range
mode. But in Hz/Duty & Capacitance measure-
ment, it can not select manual range mode.
3. SELECT Key :
This key works on the “ CAP Ù” &
“V ” range. Press the key to choose
resistance, diode or continuity test. Press
“SELECT” in “V ” range, to choose AC voltage
or DC Voltage test.
~
~
10
3. MEASURING INSTRUCTION
DC Voltage measurement
1) Connect the black test lead to “COM”
socket and red test lead to the “VÙ” socket.
2) Set the selector switch to desired “mV” or
“V” position and connect the probes
across the source or load under
measurement.
3) Read the result from the LCD panel.
Battery
+
-
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
/
V
1000
NOTE :
In places where the main display is difficult to read,
see the readings in the lower display.

11
1) Connect the black test lead to “COM”
socket and red test lead to the “VÙ” socket.
AC Voltage measurement
3) Read the result from the LCD panel.
2) Set the selector switch to desired “V~”
position and connect the probes across the
source or load under measurement
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~~
SELECT RANGE REL
HzDuty
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
/
V
750
~
AC Supply
~
NOTE :
In places where the main display is difficult to read,
see the readings in the lower display.
12
DC Current measurement
Note :
1) Before taking this measurement, disconnect
the test lead with the meter for safety.
2) In places where the main display is difficult to
read, see the readings in the lower display.
1) Set the selector switch to desired “200 ”or
“1000A ” position.
2) Press the “REL” button, the display shows
“000.0”.
Note :
As the jaw core is sensitive, some reading may
remain on the display due to some magnetic
force. If the display can not reach “0” after
pressing the “REL”, please take following steps
to correct it:
A. Clamp the current cable in the opposite
direction of the measured DC current.
B. Open the JAWS several times.
4) Open the clamp by pressing the jaw-opening
handle and insert the cable to be measured
into the jaw.
5) Close the clamp and get the reading from the
LCD panel.
6) Push the D. HOLD button to lock display
value, push it again to exit.
7) Push the LIGHT button to light the back light.

13
CORRECT
LOAD
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
V
1000
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
~
+
-
+
-
ve
INCORRECT
LOAD
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
V
1000
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
~
+
-
+
-
ve
14
a) Before this measurement, disconnect the test
lead from the meter for safety.
AC Current measurement
1) Set selector switch to desired
“ 400 / 1000A~” position.
b) In places where main display is difficult to read.
Note :
2) Open the clamp by pressing the jaw-opening
handle and insert the cable (one cable only)
to be measured into the jaw.
3) Close the clamp and get the reading from the
LCD panel.
CORRECT
LOAD
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
V
1000
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
~
AC 3phase
source
See the readings in the lower display.

15
LOAD
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
V
1000
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
~
AC 3phase
source
INCORRECT
Resistance measurement
1) Connect the black test lead to “COM” socket
and red test lead to the “V Ù”socket.
2) Set the selector switch to desired “Ù” position,
the display should show “Ù” function symbol, if
it is other function, push the SELECT button to
select resistance measurement
3) Connect the probes across circuit to be tested.
4) Read the result from the LCD panel.
Caution: Ensure that the circuit to be tested is
“dead”.
NOTE :
In places where the main display is difficult to read,
see the readings in the lower display.
16
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
MW
40.00
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
R
AUTO
/
Capacitance measurement
1) Connect the black test lead to “COM” socket
and red test lead to the “V Ù” socket.
2) Set the selector switch to desired “CAP”
position.
3) Connect the probes to the capacitance to be
tested.
4) Read the result from the LCD panel.

17
Caution :
a) Capacitors should be discharged before
being tested.
b) This device adopts charging mode to
measure capacitance, so when testing large
capacitance, it will take longer time before
the final indication, and larger the capacitor,
the longer the time.
c) When testing small capacitance, to assure the
measurement accuracy, first press “REL”
button & continue with the measurement.
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
mF
100.0
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
AUTO
/
NOTE :
In places where the main display is difficult to read,
see the readings in the lower display.
18
Frequency measurement
1) Connect the black test lead to “COM” socket
and red test lead to the “V Ù” socket.
2) Set the selector switch to desired “Hz” position.
3) Connect the probes to the point of
measurement and read the frequency from
the display.
Max. Input over-load: 250Vrms< 10sec
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
MHz
10.00
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
/
NOTE :
In places where the main display is difficult to read,
see the readings in the lower display.

19
Temperature measurement
4) Read the result from the LCD panel.
A. The temperature function shows random
number when temperature probe is
not connected. Insert the thermocouple
in temperature terminal while examining
temperature.
B. The Temperature probe supplied along with
the meter can measure temperature upto
250 °C.
D. Please use special probe to measure
high temperature.
C. Please do not try to measure voltage in
the temperature function as it will damage
the instrument.
1) Connect the black test lead of the sensor to
“T-” socket and the red test lead to the “T+”
socket.
2) Set the selector switch to “ °C” position.
3) Place the Temperature sensor probe at the
place whose temperature is to be measured.
E. In places where the main display is difficult
to read, see the readings in the lower
display.
NOTE :
20
Caution :
Ensure that the circuit to be tested is “dead”
(Not Charged).
Max. Input over-load: 250V rms <10Sec
Diode test
1) Connect the black test lead to “COM” socket
and red test lead to the “VÙ” socket.
2) Set the selector switch to “ ” position.
3) Push “SELECT” to select diode test function.
4) Connect the black and red test probe to the
cathode (-) and anode (+) ends of diode to be
tested repectively. Read the forward voltage
drop (junction) value on the display. If reverse
connected the probes to diode, display shows
over-load.
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
°C
250.0
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
/

21
Relative measurement
Press “REL” button you can measure the relative
value and “REL” appears on the display, the auto
range mode will change to manual range mode.
Press again to return to the previous condition &
“REL” disappears, but meter will you can not go
back to auto range mode. In “Hz” measurement,
you can not measure the relative value.
1) Connect the black test lead to “COM” socket
and red test lead to the “VÙ” socket.
2) Set the selector switch to “ ” position.
3) Push “SELECT” to select audible continuty test
4) Connect the probes across circuit to be tested,
the beeper sounds continuously if the
resistance is less than approx. 50Ù.
Caution :
Ensure the that circuit to be tested is “dead”
(Not Charged).
Max. Input over-load: 250V rms <10Sec
Audible Continuty test
OFF
Hz
V
W
CAP
°C
200A
1000A
400A
1000A AUTO
POWER OFF
DH>2sec
~
~~
SELECT RANGE REL
HzDuty
MW
O.l
COM
T- T+VWHz
CAT-II
MAX1000V
MAX 750V
AC True RMS
DC/AC CLAMP
~
!
AUTO
/
22
5) Keep the multimeter away from dust and dirt,
which can cause fast wear of parts.
4) While taking current measurement, keeping the
cable at the center of the clamp will get more
accurate test result.
3) Handle the multimeter gently and carefully.
Dropping it can damage the circuit boards,
Casing and cause the multimeter to work
improperly.
2) Use and store the multimeter only in normal
temperature environments specified in the
manual. Temperature extremes can shorten the
life of electronic devices, damage batteries and
distort & melt plastic parts.
1) Keep the Multimeter dry. If it gets wet, wipe it
dry immediately. Liquids can contain minerals
that can corrode electronic circuits.
4. CARE AND MAINTENANCE
4.1 Caring For Your Multimeter
6) Wipe the mutimeter with a damp cloth
occasionally to keep it looking new. Do not use
harsh chemicals, cleaning solvents, or strong
detergents to clean the multimeter.
KM 2782 / KM 2782-T Digital Multimeter is an
example of superior design & quality.
The following suggestions will help you care for
the multimeter so you can enjoy it for years.

23
4.2 Battery Replacement
1) Ensure the instrument is not connected to any
external circuit. Set the selector switch to “OFF”
position and remove the test leads from the
terminals.
2) Open the cover of the battery cabinet
using a screwdriver.
3) Replace the old batteries with the same type
new batteries.
4) Close the battery cabinet cover and fasten the
screw.
8) Please take out the battery when not using for
a long time.
7) Use only fresh batteries of the required size
and type. Always remove old or weak
batteries. They can leak chemicals that
destroy electronic circuits.
9) Remove the test leads & any input signals
before opening the case.
10) If the Test leads, Casing of meter is damaged,
do not use the meter & have it repaired as it is
be dangerous to use damaged instrument.
MUMBAI
TEST CERTIFICATE
AC / DC CLAMP METER
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 2782 / 2782-T
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO
24

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.
25
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.
26
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