LIST OF PRODUCTS
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
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
17, Bharat Industrial Estate, T. J. Road, Sewree (W),
Mumbai-400015. INDIA
Sales Direct: (022)24156638 Tel.:(022) 2412 4540, 2418 1649 Fax: 2414 9659
E-mail : kusam_meco@vsnl.net, Website : www.kusamelectrical.com
www.kusam-meco.co.in
2000A AC/DC
DIGITAL CLAMPMETER
MODEL - KM 2775
OPERATION MANUAL
TAKE MEASUREMENTS CAREFULLY AND YOU’LL SPARE YOUR
METER AND YOURSELF, SOME PAIN
INDEX
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
TITLE
PAGE
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
1. INTRODUCTION.............................................1
try to measure the voltage across a charged capacitor.
2. SAFETY NOTES.............................................2
Clamp meter users frequently burn their meters by
trying to
measure current the same way as they measure voltage. Remember,
3. FEATURES......................................................3
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.
4. GENERAL....................................................4-5
5. SPECIFICATIONS........................................6-8
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.
6. INSTRUMENT LAYOUT.............................9-12
7. MEASUREMENT......................................13-15
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.
8. MAINTENANCE.............................................16
9. TEST CERTIFICATE......................................17
10. WARRANTY...................................................18
2. SAFETY NOTES
1. INTRODUCTION
NOTE
This meter has been designed and tested According to
IEC Publication 348, Safety Requirements for
Electronic Measuring Apparatus, IEC-1010 (En61010)
and other safety standards. Follow all warnings to
ensure safe operation.
WARNING
READ “SAFETY NOTES” (NEXT PAGE) BEFORE
USING THE METER.
Read the following safety information carefully before
attempting to operate or service the Meter.
?
Use the meter only as specified in this manual :
Otherwise the protection provided by the meter may be
inpaired.
?
Always keep hands behind the meter barrier.
?
Use extreme caution when clamping around uninstalled
conductors or bus bars.
?
Never clamp around any conductor carrying a voltage
above 600V R. M. S.
?
Rated environmental conditions :
1. Indoor use.
2. Installation category III.
3. Pollution degree II.
4. Altitude up to 2000 meter.
5. Relative humidity 80% max.
6. Ambient temperature 0-40oC.
Observe the international Electrical Symbols listed
below :
Meter protected throughtout by double insulation
or reinforced insulation.
Warning ! Risk of electric shock.
!
Caution ! Refer to this manual before using the
meter.
Alternating current.
Earth (ground) terminal.
Application around and removal from hazardous
live conductors is permitted.
-1-
-2-
3. FEATURES
4. GENERAL
?
4000 - Count LCD
?
Overload Protection :
?
Full Automatic measurement
?
Voltage measurement
?
Current measurement
ACV
1000V rms
DCV
1000V
Frequency & Ohm 500V rms
?
Resistor measurement
?
Capacitor measurement
?
Conductor Size : Approx 55mm max
?
Frequency Counter
?
Dimensions : 260mm(L) X 95mm(W) x 43mm(D)
?
Range change function.
?
Weight : Approx. 540g. (Battery included)
?
Data Hold Function freezes the reading.
?
Continuity check.
?
Power Source : Standared 9V Battery.
?
Diode measurement.
?
Operating Principle : Dual slope integration
?
Low battery indication
?
Over range indication : “OL” indicated.
?
Auto Power Off (APO) function.
?
Low Battery indication : “
?
Safety design throughout with no exposed metal parts,
shielded banana plugs and recessed input terminals.
” sign appears on the display
when the battery voltage drops below accurate
operating level.
CAT IV - Is for measurements performed at the source of the
low voltage installation.
CAT III - Is for measurements performed in the building
installaton.
CAT II - Is for measurement performed on circuits directly
connected to the low voltage installation.
?
Response Time : Approx. 1 second.
?
Sample Rate : Approx. 2 times per second.
?
Temperature & Humidity for Guaranteed
?
Accuracy : -10oC to 50oC at < 80% max. Relative humidity.
CAT I - Is for measurements performed on circuits not
directly Connected to Mains.
-3-
- 4-
?
Storage Temperature & Humidity :
-20oC to 60oC at < 80% max. relative humidity.
?
Battery Life :
Approx. 100 hours on continuous use.
(Alkaline)
?
Accessories :
Test leads, Carrying Case, instruction manual,
Battery (one standard 9V).
5. SPECIFICATIONS (All at 23oC±5oC, £
80% R.H.)
AC Voltage
Range
Resolution
Accuracy (at 40-500Hz)
400 mV
4
V
40
V
400 V
1000 V
0.1 mV
1 mV
10 mV
100 mV
1
V
± (2.0% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
* Overload Protection : 1000V AC RMS
* Frequency Response : 0~400mV at 40Hz~100Hz
4V~1000V at 40Hz ~ 1KHz
DC Voltage
Range
400 mV
4
V
40
V
400 V
1000 V
Resolution
Accuracy (at 40-500Hz)
0.1 mV
1 mV
10 mV
100 mV
1
V
± (1.0% rdg + 3dgt)
± (1.0% rdg + 3dgt)
± (1.0% rdg + 3dgt)
± (1.0% rdg + 3dgt)
± (1.0% rdg + 3dgt)
* Overload Protection : 1000V DC
AC Current
Range
400 A
2000 A
Resolution
Accuracy (at 40-500Hz)
0.1 A
1 A
± (2.0% rdg + 4dgt)
± (2.0% rdg + 4dgt)
* Frequency Response : 40Hz ~ 1KHz
-5-
-6-
DC Current
Range
Capacitor
Resolution
Accuracy (at 40-500Hz)
Range
0.1 A
1 A
± (1.5% rdg + 4dgt)
± (1.5% rdg + 4dgt)
4 nF (30p-4nF)
40
nF
400 nF
4
m
F
40
m
F
400 m
F
4
mF
400 A
2000 A
Resistance :
Range
400
4
40
400
4
40
Resolution
Accuracy
W
0.1 W
1
W
KW
10 W
KW
100 W
KW
1 KW
MW
10 KW
MW
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (1.5% rdg + 3dgt)
± (2.0% rdg + 4dgt)
* Overload Protection : 500V AC RMS or 500V
Continuity Test
Range
Audible threshold
400 W
Less than 25W
* Overload Protection : 500V AC RMS or 500V DC
Resolution
1
pF
10
pF
100 pF
1
nF
10
nF
100 nF
1
m
F
Resolution
Accuracy
2V
1 mV
± (1.5%rdg + 3dgt)
-7-
± (3.0% rdg + 5dgt)
± (2.0% rdg + 5dgt)
± (2.0% rdg + 5dgt)
± (2.0% rdg + 5dgt)
± (2.5% rdg + 5dgt)
± (2.5% rdg + 5dgt)
± (2.5% rdg + 5dgt)
* Overload Protection : 500V AC RMS or 500V DC
Frequency Counter
Range
4
40
400
4
40
KHZ
KHz
KHz
MHz
MHz
Resolution
1
Hz
10
Hz
100
Hz
1
KHz
10
KHz
Accuracy
± (0.3% rdg + 2dgt)
± (0.3% rdg + 2dgt)
± (0.3% rdg + 2dgt)
± (0.3% rdg + 2dgt)
± (0.5% rdg + 2dgt)
* Overload Protection : 500V AC RMS or 500V DC
* Trigger level : 0.2V
Diode Test
Range
Accuracy
-8-
6. INSTRUMENT LAYOUT
V
!
CAT III
MAX 600V
W
(6)
(7)
(1) Transformer Jaws
Pick up the AC current or DC current flowing through
the conductor. The “+” marking on the jaw indicates
direction of DC current existing on the conductor
being tested which follows forward and vertically with
jaws, the reading shown on display is positive.
(2) Barrier
Provide a protective distance from hands to
conductor.
(3) Jaw Trigger
Press the lever to open the transformer jaws.
When the lever is released, the jaws will close again.
(4) Function selector rotary switch
The rotary switch selects the function.
(5) LCD Display
The LCD display indicates the function mode, bar
graph, annunciator, and measured value of a signal.
Field effects 3¾ digit LCD with maximum reading of
3999.
-9-
-10-
(6) Volt / Ohm / Frequency Terminal
This is positive input terminal for Voltage/Ohm/
Frequency measurement. Use the RED test lead
to connect.
(7) COM Terminal
This is the ground input terminal. Use the BLACK
test lead to connect.
(10) HOLD Button
Press the HOLD button (HOLD annunciator turns
on) makes the meter stop updating the LCD display.
This mode can be nested in most of the special
modes. Enabling HOLD function in automatic mode
makes the meter switch to manual mode, but the full
scale range remains the same. HOLD function can
be cancelled by changing the measurement mode,
pressing Range, or push HOLD again.
(11) DCA zero adjust shaft
(8) Select Button
In the resistance + continuity + diode function
Press the Select button to selects resistance,
Continuity or diode function.
(9) Range Button
Press the Range button to selects the manual range
mode and turns off the AUTO annunciator and turns
on the manual annunciator and changes the full
scale range. In manual range mode, each time
press Range button (less than one second), the
range increments and a new value is displayed. To
exit the manual range mode and return to auto
mode, press the RANGE button (more than one
second).
-11-
(12) Auto Power Off (APO)
The meter has a default auto power off function
(APO annunciator turns on). If the meter idles for
more than 10 minutes, the meter automatically turns
the power off. When this happens, the state of the
meter is saved. In order to disable auto power off
function, power function, power on the meter when
any of the push function, except for HOLD, is
pressed down.
-12-
7. MEASUREMENT
Before proceeding with measurement, read the safety
notes.
(1) Voltage Measurement
Insert the BLACK test lead to COM and the RED one
to the other terminal.
Switch to ACV function for AC voltage or DCV
function for DC Voltage.
Use the test lead tip to the circuit and read the
reading of display directly.
If the readings exceed AC1000V (DC1000V), may be
the reading value is wrong and it is dangerous.
(Refer to the safety notes).
(2) Current Measurement
Switch to ACA function for AC Current or DCA
function for DC Current.
If the initial reading of DCA is not zero, use the DCA
zero adjust shaft to adjust.
Make sure that the test lead is not connecting to the
terminal.
Press the jaw trigger to open the transformer jaws &
clamp onto one conductor only. Read the display
reading directly.
(3) Resistance Measurement
Switch to OHM range & make sure there is no power
in the circuit being measured. Insert the BLACK lead
to the COM and the RED one to another.
Connect the test leads to the circuit or device under
test & read the display directly.
-13-
(4) Continuity Check
Continuity check shares the same configuration with
400.0W
manual resistance measurement mode, but
with buzzer output to indicate continuity.
The buzzer generates a 2KHz sound whenever the
digit number less than 25W
. Because the cycle time
of measurement is only 50ms, the least significant
digit will not display.
(5) Diode Measurement
Diode measurement mode shares the same
configuration
with 4.000V manual voltage
measurement mode.
If the test circuit is open or the voltage drop between
the two ports of the device (diode) under test are
larger than 2V, the LCD panel will show “OL”.
The buzzer generates a 2KHz sound whenever the
digit number is less than 0.25V. Because the cycle
time of measurement is only 50ms, the least
significant digit will not display.
(6) Capacitance Measurement
Switch to capacitance measurement mode. Insert
the BLACK test lead to COM and the RED one to
the other terminal.
Connect the test leads to the capacitance test and
read the display directly.
In order to obtain an accurate reading, a capacitor
must be discharged before measurement begins.
The chip has a built-in discharge mode to
automatically discharge the capacitor.
-14-
(7)
In discharge mode, the LCD displays DS.C
Discharging through the chip is quite slow.
We recommend the user to discharge the
Capacitor with same other apparatus.
8. MAINTENANCE
Frequency measurement
(1) Disconnect the test leads from the instrument and
turn off power.
Switch to frequency measurement mode.
Battery Replacement :
When low battery warning appears, chance a new
battery as follows :
Insert the BLACK test lead to COM and the RED
one to the other terminal.
(2) Unscrew the battery cover and replace a new
battery.
Apply the test leads to the points across which the
frequency is to be measured, and read the result
directly from the display.
Cleaning and Storage :
WARNING
To avoid electrical shock or damage to the meter,
do not get water inside the case.
Periodically wipe the case with a damp cloth and
detergent. Do not use abrasives or solvents.
If the meter is not used for over 60 days, remove the
battery for storage.
Due to our policy of constant improvement and
development, we reserve the right to change
specifications without notice.
-15-
-16-
WARRANTY
MUMBAI
TEST CERTIFICATE
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
DIGITAL CLAMPMETER
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
This Test Certificate warrantees that the product has been
inspected and tested in accordance with the published
specifications.
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.
The instrument has been calibrated by using equipment
which has already been calibrated to standards traceable
to national standards.
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.
MODEL NO. KM 2775
“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”.
SERIAL NO. ___________
“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.
DATE: ___________
QC
ISO 9001
REGISTERED
KUSAM-MECO
PASS
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.
-17-
-18-