KUSAM-MECO KM 2784-T 1000A AC/DC TRMS Digital Clampmeter Manual

®

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

®

OFFICE ADDRESS

G 17, Bharat Industrial Estate, T. J. Road,

Sewree (W), Mumbai - 400 015. INDIA.

Sales Direct : (022) 24156638

Tel. : 24124540, 24181649

Email : [email protected]

Website : www.kusamelectrical.com

SERVICE CENTER

Shop no.18, 1st Floor, CIDCO Shopping

Complex, Plot # 9, Sector-7,

Rajiv Gandhi Marg, Sanpada,

Navi Mumbai - 400705.

Sales Direct : (022) 27754546

Tel. : 27750662, 27750292

Email : [email protected]

Website : www.kusamelectrical.com

04/02/2020

AN ISO 9001:2015 COMPANY

TRUE RMS

DIGITAL CLAMPMETER

MODEL - KM 2784-T

!

600VCAT.III

1000VCAT.II

!

MAX 1000

A

~

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V ~ OFF

1000A ~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER

AUTO

RMS-MEAS

DC

000.0

V

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

OPERATION MANUAL

®

1. GENERAL INSTRUCTION

This instrument complies with IEC 61010-1, CAT II 1000V &

CAT III 600V overvoltage standards.

To get the best service from this instrument, read carefully this user’s manual & respect the detailed safety precautions.

International symbols used on the meter & in this manual are explained in chapter 1.2.

1.1 Precautions safety measures

1.1.1 Preliminary

* As the possibilities of high transient overvoltages occurred in today’s power systems increase, more stringent safety standards are set for the electrical test equipment. Transients on electrical systems (power grid, feeder or branch circuits) will trigger a series of incidents that may result in serious personal injury. To protect you against transients, safety must be built into the test equipment.

Overvoltage category

In Brief Examples

CAT I Electronic

● Protected Electronic Equipment.

● Equipment connected to

(source) circuits in which

measures are taken to limit

transient overvoltages to an

appropriately low level.

● Any high-voltage, low-energy

source derived from a high

winding resistance transformer,

such as the high-voltage section

of a copier.

01

®

Overvoltage category

CAT II

CAT III

CAT IV

In Brief Examples

Single-phase receptacle connected loads

Three-phase distribution, including single-phase commercial lighting

Three-phase at utility connection, any outdoor conductors

● Appliance, portable tools, &

other household & similar loads.

● Outlet & long branch circuits.

● Outlets at more than 10 meters

(30 feet) from CAT III source.

● Outlets at more that 20 meters

(60feet) from CAT IV source.

● Equipment in fixed installations,

such as switchgear & poly-

phase motors.

● Bus & feeder in industrial plants.

● Feeders & short branch circuits,

distribution panel devices.

● Lighting systems in larger

buildings.

● Appliance outlets with short

connections to service entrance.

● Refers to the “origin of install-

ation”; i.e., where low-voltage

connection is made to utility

power.

● Electricity meters, primary over

current protection equipment.

● Outside & service entrance,

service drop from pole to

building, run between meter &

panel.

● Overhead line to detached

building, underground line to

well pump.

02

®

* When using this Multimeter, the user must observe all normal

safety rules concerning.

---protection against the dangers of electric current.

---protection of the Multimeter against misuse.

* For your own safety, only use the test probes supplied with the

instrument. Before use, check that they are in good condition.Pg.2

1.1.2 During use

* If the meter is used near noise generating equipment, be aware that display may become unstable or indicate large errors.

* Do not use the meter or test leads if they look damaged.

* Use the meter only as specified in this manual, otherwise, the

protection provided by the meter may be impaired.

* Use extreme caution when working around bare conductors or

bus bars.

* Do not operate the meter around explosive gas, vapor, or dust.

* Verify a Meter’s operation by measuring a known voltage. Do not

use the meter if it operates abnormally. Protection may be

impaired. When in doubt, have the meter serviced.

* Uses the proper terminals, function, & range for your

measurements.

* When the range of the value to be measured is unknown, check

that the range initially set on the multimeter is the highest possible

or, wherever possible, choose the autoranging mode.

* To avoid damages to the instrument, do not exceed the maximum

limits of the input values shown in the technical specification

tables.

* When the multimeter is linked to measurement circuits, do not

touch unused terminals.

03

®

* Caution when working with voltages above 60Vdc or 30Vac rms.

Such voltages pose a shock hazard.

* When using the probes, keep your fingers behind the finger guards.

* When making connections, connect the common test lead before

connecting the live test lead; when disconnecting, disconnect the

live test lead before disconnecting the common test lead.

* Before changing functions, disconnect the test leads from the

circuit under test.

* For all dc functions, including manual or auto-ranging, to avoid the

risk of shock due to possible improper reading, verify the presence

of any ac voltages by first using the ac function. Then select a dc

voltage range equal to or greater than the ac range.

* Disconnect circuits power & discharge all high-voltage capacitors

before testing resistance, continuity, diodes, or capacitance.

* Never perform resistance or continuity measurements on live

circuits.

* Before measuring current, check the meter’s fuse & turn off

power to the circuit before connecting the meter to the circuit.

* In TV repair work, or when carrying out measurements on power

switching circuits, remember that high amplitude voltage pulses

at the test points can damage the multimeter. Use of a TV filter

will attenuate any such pulses.

* Use just 3pcs AAA batteries, properly installed in the meter’s

battery case, to power the meter.

* Replace the battery as soon as the battery indicator “ ”

appears. With a low battery, the meter might produce false

readings that can lead to electric shock & personal injury.

* Do not measure voltages above 1000V in Category III, or 600V

in Category IV installations.

04

®

* When in REL mode, the “REL” symbol is displayed. Caution must

be used because hazardous voltage may be present.

* Do not operate the meter with the case (or part of the case)

removed.

1.2 Symbols :

Symbols used in this manual & on the instrument.

CE

Caution ! Refer to the instruction manual. Incorrect use may result in damage to the device or its components.

AC--Alternating Current

DC--Direct Current

AC or DC

Earth (Ground)

Double Insulated

Fuse

Conforms to European Union directives

1.3 Instructions

* Remove test leads from the meter before opening the meter case or battery cover.

* When servicing the meter, use only specified replacement parts.

* Before opening up the instrument, always disconnect from all sources of electric current & make sure you are not charged with static electricity, which may destroy internal components.

* Any adjustment, maintenance or repair work carried out on the meter while it is live should be carried out only by appropriately qualified personnel, after having taken into account the instructions in this present manual.

05

®

* A “qualified person” is someone who is familiar with the installation, construction & operation of the equipment & the hazards involved.

He is trained & authorized to energize & de-energize circuits & equipment in accordance with established practices.

* When the instrument is opened up, remember that some internal capacitors can retain a dangerous potential even after the

instrument is switched off.

* If any faults or abnormalities are observed, take the instrument out of service & ensure that it cannot be used until it has been checked out.

* if the meter is not going to be used for a long time, take out the battery & do not store the meter in high temperature or high humidity environment.

06

®

2. TECHNICAL SPECIFICATIONS:

FEATURES :

í Measurement CAT II 1000V, CAT III 600V AC/DC

í Altitude < 2000m

í MAX / MIN Function

í Pollution Degree 2

í Data Hold Function

í Manual ranging & Autorange Mode

í Relative measurement mode

í Backlight for Display

í TRMS Measurement.

GENERAL SPECIFICATIONS :

í

Sensing : True RMS sensing

í

Display : 3-3/4 digits 4000 counts LCD display.

Automatic indication of functions & symbols.

í

Jaw Size : 40mm

í

Sampling rate : 3 times/sec (Digital Display).

í

Maximum Voltage between terminals &

Earth ground : 1000VAC rms or 1000VDC

í

Operating Temperature : 0~40°C(32°F ~ 122°F)

<80% RH, <10°C non-condensing.

í

Storage Temperature : -10~60°C(14°F ~ 140°F)

<70% RH, battery removed.

í

Temperature Coefficient : 0.1 x (specified accuracy) /

°C (<18°C or >28°C)

07

®

í

Range selection : automatic & manual.

í

Over Range Indication : LCD will show “OL”

í

Low Battery Indication : The is displayed when the battery

voltage drops below the operating voltage.

í

Polarity : Automatic polarity “-” display

í

Auto Power Off : The meter is powered off 15 minutes

í

Power Supply : 1.5V AAA x 3 Battery.

í

Dimension : Approx.190(L) x 90(W) x 40(H)mm

í

Weight : Approx. 500 gms. (including battery).

ACCESSORIES :

Test leads set, Users Manual, Battery, Thermocouple &

Carrying Case.

08

®

3. ELECTRICAL SPECIFICATIONS:

Accuracy is (% reading digits + number of digits) or otherwise specified, at 18°C To 28°C & less than 80% relative humidity.

DC CURRENT

Range

400.0 A

1000 A

Resolution

0.1 A

1 A

Accuracy

± (3.0%rdg + 6dgts)

AC CURRENT (40Hz ~ 400Hz )

Range

400.0 A

1000 A

Resolution

0.1 A

1 A

Accuracy

± (3.0%rdg + 8dgts)

Above accuracies can be within 5% ~100% of the full range.

The true RMS meter has residual value within 10 counts when the test leads are shorten, but that will not affect the accuracy of measurement.

1. Maximum input current : 1000A DC or AC rms.

2. Use ZERO function to clean the initial reading before

measurement.(ZERO function will disable AUTOrange)

DC VOLTAGE

Range

400.0 mV

4.000 V

40.00 V

400.0 V

1000 V

Resolution

0.1 mV

1 mV

10 mV

100 mV

1 V

Accuracy

± (0.5%rdg + 5dgts)

± (0.8%rdg + 5dgts)

± (1.0%rdg + 2dgts)

09

®

AC VOLTAGE ( 40Hz ~ 1000Hz)

Range

4.000 V

40.00 V

400.0 V

1000 V

Resolution

1 mV

10 mV

100 mV

1 V

Accuracy

± (1.0%rdg + 5dgts)

± (1.5%rdg + 5dgts)

Above accuracies can be within 5% ~100% of the full range.

The true RMS meter has residual value within 10 counts when the test leads are shorten, but that will not affect the accuracy of measurement.

1. Response for ACV : RMS measure, calibrated in rms

of sine wave.

2. Overload Protection : 1000V DC or 1000V AC rms.

4. Input Impedance (Nominal): AC & DC Voltage : >10M W

CAPACITANCE

Range

4.000 nF

40.00 nF

400.0 nF

4.000

m F

40.00

m F

400.0 m F

4.000 mF

Resolution

1 pF

10 pF

100 pF

1 nF

10 nF

100 nF

1 m F

Accuracy

± (5.0%rdg + 20dgts)

± (3.0%rdg + 15dgts)

± (5.0%rdg + 10dgts)

RESISTANCE

Range

400.0 W

4.000 k W

40.00 k W

400.0 k W

4.000 M W

40.00 M W

Resolution

0.1

W

1 W

10 W

100 W

1 k W

10 k W

Accuracy

± (0.5%rdg + 3dgts)

± (0.5%rdg + 2dgts)

± (1.5%rdg + 5dgts)

10

®

LOGIC FREQUENCY (1Hz-1MHz)

Range

4.000 Hz

Resolution

0.001 Hz

40.00 Hz

400.0 Hz

4.000 kHz

0.01 Hz

0.1 Hz

0.001 kHz

Accuracy

±(0.1%rdg+5dgts)

40.00 kHz

400.0 kHz

4.000 MHz

0.01 kHz

0.1 kHz

1 kHz

Voltage Input <10Vpp

TEMPERATURE

Range

0°C~ 400°C

400°C~ 1000°C

Resolution

1°C

Accuracy

±(2.0%rdg+3°C)

±(2.0%rdg)

Note : The specifications of temperature don’t include

thermocouple errors.

Supplied Thermocouple is suitable for measurement upto 250 °C

DIODE TEST

Range Resolution

2.000 V 0.001 V

Test Condition

Forward DC Current approximately 1mA.

Reversed DC Voltage approximately 1.5V.

CONTINUITY CHECK

Range

200.0 W

Resolution

0.1 W

Test Condition

Open Circuit Voltage : approx. 0.5V

Description : Continuity beeper £ 50 W

11

®

2. DESCRIPTION

2.1 Product Description :

The front panel is shown as in Figure 2-1, explanation being as follows:

1. Clamp -

Used for letting the wire across it.

(Notice the direction of electricity).

2. Rotary switch -

Used for selecting measurement

functions.

3. Keypad -

Measurement function keys.

4. LCD display -

Used for displaying the measuring

results & various symbols.

5. Terminal receiving the red test

lead for voltage, resistance,

capacitance, frequency, Temperature,

diode & continuity measurements.

6. COM -

Terminal receiving the black test lead

as a common reference.

7. Used for open the clamp

!

600VCAT.III

1000VCAT.II

!

MAX 1000

A

~

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~ OFF

1000A

~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

AUTO

RMS-MEAS AC/DC CLAMP METER

DC

000.0

V

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

H

Figure 2-1

12

1

5

6

3

4

2

7

®

2

1

2. DESCRIPTION

3

4

5

6

7

8

9

1

AC DC

AUTO

H REL MAX MIN 8.8.8.8

°C°F kM

W

Hz

FAV

19 ol

13

Figure 2-2

10

11

12

®

LCD Screen is shown as in Figure 2-2, with its every symbol’s meaning shown as in the Table 1:

Symbol

AUTO

AC

DC

H

REL

MAX

MIN

Description

Indicates negative readings

The meter is in the Autorange mode in which the meter automatically selects the range with the best resolution

Indicator for AC Voltage or Current

Indicator for DC Voltage or Current

Low Battery indication

The meter is in Data Hold mode.

The meter is in Relative Measurement mode.

Display maximum data

Display minimum data

The meter is in Continuity Check mode

The meter is in Diode Test mode.

% °C°F

KM W Hz n m mFAV

OL

Measurement units

This symbol means that the input is too large for the selected range.

Auto power off function indication.

13 14

®

2.3 Keypad

2.3.1 FUNC.

Press it to switch the second function in the same rotary position.

2.3.2 RANGE

At V~, V , W , A, mA & m A.

1. Press RANGE to enter the manual ranging mode.

2. Press RANGE to step through the ranges available for the

selected function.

3. Press & hold RANGE for 2 seconds to return to autoranging.

2.3.3 MAX / MIN

This key is for measuring maximum value & minimum value.

1. Press it to enter Max/Min mode.

2. Press it again; the LCD will display the Maximum Value.

3. Press it again; the LCD will display the Minimum Value.

4. Press & hold it for 2 seconds, the meter will return to normal

measurement state.(Except Hz/Duty & Capacitance)

2.3.4

H

Press it to enter & exit the Data Hold mode.

Pressit & hold 2 seconds, backlight on; if press it & hold for

2 seconds again, backlight off.

15

®

3. FUNCTION DESCRIPTION

3.1 General Functions

3.1.1 DATA HOLD mode

Data Hold mode makes the meter stop updating the display.

Enabling Data Hold function in autorange mode makes the meter switch to manual ranging mode, but the full-scale range remains the same. Data Hold function can be cancelled by changing the

To enter & exit the Data Hold mode :

value, H is displayed.

2. A second short press returns the meter to normal mode.

3.1.2 Manual ranging & Autorange mode

The meter has both manual ranging & autorange options.

* In the autorange mode, the meter selects the best range for the

input detected. This allows you to switch test points without

having to reset the range.

* In the manual ranging mode, you select the range. This allows

you to override autorange & lock the meter in a specific range.

* The meter defaults to the autorange mode in measurement

function that have mode than one range. When the meter is in

the auto-range mode, AUTO is displayed.

To enter & exit the manual range mode :

1. Press RANGE key. The meter enters the manual ranging mode.

AUTO turns off. Each presses of RANGE key increments the

range. When the highest range is reached, the meter wraps to

the lowest range.

16

®

NOTE : If you manually change the measurement range after

entering the Data Hold modes, the meter exits this mode.

2. To exit the manual ranging mode, press & hold down RANGE key for two seconds. The meter returns to the autorange mode &

AUTO is displayed.

3.1.3 Auto power off mode

The meter at the “auto power off mode” & display if the meter is on but not used for 15 minutes. Press the FUNC . key or rotate the rotary switch to wake the meter up.

To disable the “auto power off mode”, hold down the FUNC , key while turning the meter on.

Press the FUNC. key or rotate the rotary switch to wake the meter up.

3.1.4 Relative measurement mode

The meter will display relative measurement in all functions except frequency.

To enter & exit the relative measurement mode.

1. with the meter in the desired function, touch the test leads to the circuit on which you want future measurement to be based.

3.1.5 RMS measurement

All the AC measurement values is the RMS (root-mean-square) values.

Frequency range is up to 1KHz sine.

17

®

3.2 MEASUREMENT FUNCTIONS

3.2.1 AC & DC voltage measurement

!

To avoid electrical shock & / or damage to the instrument, do not attempt to take any voltage measurement that might exceeds 1000Vdc or 1000Vac rms.

The meter’s voltage ranges are 400.0mV,

4.000V, 40.00V, 400.0V and 1000V.

To measure AC or DC voltage (set up & connect the meter as shown in Figure 3-1) :

1. Set rotary switch to the AC/DC V range.

2. Press the FUNC.

key can change the

mode of voltage test.

3. Connect the black & red test leads to the

COM & V terminals respectively.

4. Connect the test leads to the circuit being

measured.

5. Read the displayed value. The polarity of

red test lead connection will be indicated

when making a DCV measurement.

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

1000A

~

!

MAX 1000

A

~

AUTO-POWER OFF

V

~ OFF

~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER

DC

AUTO 000.0

RMS-MEAS

V

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

AC

VOLTAGE

V

DC

VOLTAGE

NOTE :

● Unstable display may occur especially at

400mv range, even though you do not put test leads into input terminals. For better accuracy when measuring the DC offset of an AC Voltage, measure the AC Voltage range equal to or higher than the AC range.

This improves the accuracy of te DC measurement by ensuring that the input protection circuits are not activated.

!

600VCAT.III

1000VCAT.II

!

A

MAX 1000

~

KUSAM-MECO

KM 2784-T

400A

1000A

~

V

~

AUTO-POWER OFF

~ OFF

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

AUTO

DC

000.0

V

1000V

CAT.II

600V

CAT.III

COM

!

E~

V W Hz

+ -

Figure 3-1 Measuring

AC & DC Voltage

18

®

3.2.2 CURRENT CLAMP MEASUREMENT :

overload current when measurement.

The meter’s current ranges are 400.0A &

1000A. To measure current (set up the

Meter as shown in Figure 3-2):

1. Set the rotary switch to the DC/AC

400A or 1000A range.

2. Press the FUNC.

key to select DCA

or ACA measuring mode.

3. Let the wire across the binding clip

which you want to measure.

(Notice the direction of current, & do

not across the loop wires—Live &

Neutral both).

4. Read the displayed value.

!

600VCAT.III

1000VCAT.II

!

MAX 1000 ~

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~

OFF

1000A

~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

RMS-MEAS AC/DC CLAMP METER

AUTO

DC

000.0

V

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

H

Figure 3-2 Measuring

AC & DC Current

3.2.3 RESISTANCE MEASUREMENT

!

To avoid electrical shock & / or damage to the instrument, disconnect circuit power & discharge all high-voltage capacitors before measuring resistance.

The meter’s Resistance ranges are 400.0

W , 4.000k

W , 40.00k

W ,

400.0k

W , 4.000M

W and 40.00M

W .

To measure Resistance (set up the meter as shown in Figure 3-4) :

1. Set the rotary switch to W range.

2. Connect the black & red test leads to the COM & V W terminals

respectively.

3. Connect the test leads to the circuit being measured & read the

displayed value.

19

®

Some tips for measuring Resistance :

● The measured value of a resistor

in a circuit is often different from

the resistor’s rated value. This

is because the meter’s test

current flows through all

possible paths between the

probe tips.

Figure 3-4 Measuring

Resistance

● In order to ensure the best

accuracy in measurement of

low resistance, short the test

leads before measurement &

memory the test probe

resistance in mind. This

necessary to subtract for the

resistance of the test leads.

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

1000A

~

~

V

AUTO-POWER OFF

~ OFF

W

!

MAX 1000 ~

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

AUTO

RMS-MEAS AC/DC CLAMP METER

DC

000.0

V

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

H

● The resistance function can

produce enough voltage to forward-bias

silicon diode or transistor junctions,

causing them to conduct. To avoid this, do not use the 40M W

range for in-circuit resistance measurements.

● On 40 M W range, the meter may take a few seconds to stabilize

reading. This is normal for high resistance measuring.

● When the input is not connected, i.e. at open circuit, the figure

“OL” will be displayed for the overrange condition.

3.2.4 Capacitance measurement :

instruments, disconnect circuit power & discharge all high-

voltage capacitors before measuring capacitance. Use the

DC Voltage function to confirm that the capacitor is

discharged.

20

®

The meter’s capacitance ranges are

4.000nF, 40.00nF, 400.0nF, 4.000

m F,

40.00

m F, 400.0

m F & 4.000mF. To measure Capacitance (set up the Meter

as shown in Figure 3-5):

1. Set the rotary switch to W range.

2. Press the FUNC.

key to select

Capacitance Test.

3. Connect the black & red test leads to

the COM & terminals respectively

(or you can use capacitor test lead).

4. Connect the test leads to the capacitor

being measured & read the displayed

value.

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER

RMS-MEAS

AUTO 100.0

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

Figure 3-5 Measuring

Capacitance

!

600VCAT.III

1000VCAT.II

!

MAX 1000

A

~

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~ OFF

1000A

~

W

Hz

Some tips for measuring Capacitance :

● The meter may take a few seconds (>20 seconds on 400.0

m F range) to stabilize reading. This is normal for high capacitance measuring.

● To improve the accuracy of measurements less than 4nF, subtract the residual capacitance of the Meter & leads.

● Below 100pF, the accuracy of measurements is unspecified.

3.2.5 CONTINUITY CHECK

!

To avoid electrical shock & / or damage to the instrument, disconnect circuit power & discharge all high-voltage capacitors before testing for Continuity.

To test for continuity (set up the Meter as shown in Figure 3-6):

1. Set the rotary switch to range.

2. Connect the black & red test leads to the COM & W terminals

respectively.

21

®

ON

OFF

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

1000A

~

~

V

AUTO-POWER OFF

~ OFF

!

MAX 1000

A

~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER

RMS-MEAS

AUTO 000.5

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

!

600VCAT.III

1000VCAT.II

!

MAX 1000 A

~

KUSAM-MECO

KM 2784-T

400A

1000A

~

V

~

AUTO-POWER OFF

~

OFF

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

AUTO 000.5

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V

W

Hz

Figure 3-6 Checking the Continuity

3. Connect the test leads to the resistance in the circuit being

measured.

4. When the test lead to the circuit is below 50 W , a continuous

beeping will indicate it.

NOTE :

● Continuity test is available to check open / short of the circuit.

3.2.6 DIODE TEST

!

To avoid electrical shock &/or damage to the instrument, disconnect circuit power & discharge all high-voltage capacitors before testing diodes.

To test a diode out of a circuit (set up the Meter as shown in

Figure 3-7):

1. Set the rotary switch to range.

2. Press the FUNC.

key to select Diode test.

3. Connect the black & red test leads to the COM & W terminals

respectively.

22

®

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~

OFF

1000A

~

W

!

MAX 1000 A

~

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

0640

V

1000V

CAT.II

600V

CAT.III

COM V

!

MAX

1000V

E~

W Hz

Forward Bios

Anode Cathode

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~

OFF

1000A

~

W

!

MAX 1000 A

~

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

OL

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

Hz

V

Reverse Bios

Cathode Anode

Figure 3-7 Measuring Diode

4. For forward-bias readings on any semiconductor component,

place the red test lead on the component’s anode & place the

black test lead on the component’s cathode.

5. The meter will show the approx. forward voltage of the diode.

In a circuit, a good diode (Si) should still produce a forward bias reading of 0.5V to 0.8V, however, the reverse-bias reading can vary depending on the resistance of other pathways between the probe tips.

3.2.7 FREQUENCY MEASUREMENT

!

Use for TTL/CMOS level. Do not measure Frequency on high voltage (>24V) to avoid electrical shock hazard & / or damage to the instrument.

The meter can measure Frequency.

To measure Frequency :

1. Set the rotary switch to the Hz range.

2. Insert the black & red test leads into the COM & Hz input

terminals.

23

®

3. Connect the test leads tip in parallel

with the circuit to be measured. And

don’t touch any electrical conductors.

4. Read the result directly from the

display.

NOTE :

In noisy environment, it is preferable to use shield cable for measuring small signal.

!

600VCAT.III

1000VCAT.II

KUSAM-MECO

KM 2784-T

400A

1000A

~

W

!

MAX 1000 A

~

AUTO-POWER OFF

~ OFF

Hz

TRMS

FUNC.

REL

EF

RANGE

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

60.00

1000V

CAT.II

600V

CAT.III

COM

MAX

1000V

!

E~

V W Hz

Frequency

V

~

Figure 3-8 Measuring Frequency

3.2.8 TEMPERATURE MEASUREMENT

!

To avoid electrical shock & / or damage to the instrument, do not apply any voltage source between the °C terminal & the

COM terminal.

To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 60V DC or

24V rms AC. To avoid damage or burns. Do not make temperature measurement in microwave ovens.

To measure temperature :

1. Set the rotary switch to °C range & the LCD will show the current environment temperature.

2. Insert ‘K’ type thermocouples into the COM terminal & °C terminal

(or you can insert it by using Multi Function Socket). Takings care to observe the correct polarity.

3. Touch the object with the thermocouple probe for measurement.

4. Read the stable reading from LCD.

24

®

3.2.9 NCV (Non-Contact Voltage Detect)

AC the EF-DETECT AREA close to the AC power cable or the power socket, if AC electrical Voltage is present, the Buzzer warning will sound, and the symbol bar “-” will be displayed on the LCD.

The lowest detect voltage is around 50V

50/60Hz. The LCD display EF, when detect the AC voltage signal, the LCD display ‘-’ /

‘--’ / ‘---’ / ‘----’ from weak to strong. This function is depending model.

!

600VCAT.III

1000VCAT.II

!

MAX 1000

A

~

KUSAM-MECO

KM 2784-T

400A

~

AUTO-POWER OFF

V

~ OFF

1000A

~

W

Hz

TRMS

FUNC.

REL

RANGE

EF

MAX

MIN

H

AC/DC CLAMP METER RMS-MEAS

1000V

CAT.II

600V

CAT.III

COM

!

MAX

1000V

E~

V W Hz

Figure 3-10 NCV

5. MAINTENANCE

This section provides basic maintenance information, including fuse

& battery replacement instructions. Do not attempt to repair or service your meter unless you are qualified to do so & have the relevant calibration, performance test, & service information.

5.1 GENERAL MAINTENANCE

To avoid electrical shock or damage to the meter, do not get water inside the case.

Remove the test leads & any input signals before opening the case.

Periodically wipe the case with a damp cloth & mild detergent.

Do not use abrasives or solvents.

Dirt or moisture in the terminals can affect readings.

25

®

TO CLEAN THE TERMINALS :

Turn the meter off & remove all test leads.

Shake out any dirt that may be in the terminals.

Soak a new swab with a cleaning & oiling agent (such as WD-40).

Work the swab around in each terminal. The oiling agent insulates the terminals from moisture-related contamination.

5.2 BATTERY REPLACEMENT

To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator

“ ” appears.

Before replacing the battery, disconnect test leads & / or any connectors from any circuit under test, turn the meter off & remove test leads from the input terminals.

26

®

MUMBAI

TEST CERTIFICATE

TRMS DIGITAL CLAMPMETER

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.

SERIAL NO. ___________

DATE: ___________

ISO 9001

REGISTERED

27

QC

KUSAM-MECO

PASS

®

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 &

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.

28