Kusam-meco 2700 Bedienungsanleitung

CLAMP METER

2700 / 2790

DATA HOLD

2700

CLAMP METER

DCV

ACAACV

200

OFF OFF

200K

200

200V

1000

V750V

200V

200A

300A

20A

500V MAX

1000VDC

750VAC

MAX

COM VW

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,

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.

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.

TAKE MEASUREMENT CAREFULLY AND YOU’LL

SPARE YOUR METER AND YOURSELF, SOME PAIN

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.

Table of Contents

Title Page

Overview ...............................................

Unpacking Inspection

Rules For Safe Operation

International Electrical Symbols

The multimeter Structure

Functional Buttons

Display Symbols

Measurement Operation

A. DC Voltage Measurement

B. AC Voltage Measurement

C. AC Current Measurement

D. Measuring Resistance

E. Measuring Diodes & Continuity

F. Measuring Frequency

General Specifications

Electrical Specifications

A . AC Current

B. AC Voltage

C. DC Voltage

D. Resistance

E. Diodes and Continuity Test

F. Frequency

Maintenance

A . Replacing the Battery

B. Test Certificate

Overview

Warning : identifies conditions and

actions that could result in

serious injury or even death to

the user.

Caution : identifies conditions and Actions

that could cause damage or

malfunction in the instrument.

Terms in this manual

Digital Clampmeter Model - 2700/2790

(hereafter referred to as “the Meter”) is a 3½

digits Clampmeter with steady operations, and

highly reliable hand-held measuring instrument

having different measurement positions. The

Clampmeter not only can measure AC/DC

Voltage, AC Current, Resistance, Diodes and

Continuity, Frequency (in model 2790) but also

has Data Hold, Full Icon Display.

To avoid electric shock or personal injury,

read the “Safety Information” and “Rules

for Safe Operation”carefully before using

the Meter.

Warning

1 2

Unpacking Inspection

Open the package case and take out the

Clampmeter. Check the following items

carefully to see any missing or damaged part :

Qty.

User Manual

Test Lead

In the event you find any Part missing or

damaged, please contact your dealer

immediately.

Item Description

1pair

Rules For Safe Operation (1)

Warning

To avoid possible electric shock or personal

injury, and to avoid possible damage to the Meter

or to the equipment under test, adhere to the

following rules :

n Before using the Meter inspect the case. Do not

use the Meter if it is damaged or the case (or part

of the case) is removed. Look for cracks or

missing plastic. Pay attention to the insulation

around the connectors and Clamps.

n Inspect the test leads for damaged insulation or

exposed metal. Check the test leads for Continuity.

Replace damaged test leads with identical

electrical Specifications before using the Meter.

n Do not apply more than the rated voltage, as

marked on the Meter, between the terminals or

between any terminal and grounding.

n The rotary switch should be placed in the right

position and no any changeover of range shall be

made while measurement is conducted to

prevent damage of the Meter.

n When measurement is taken at an effective

voltage over 60V in DC or 30V rms in AC, special

care should be taken for there is danger of

electric shock.

n Use the proper terminals, function, and range for

your measurements.

n Do not use or store the Meter in an environment

of high temperature, humidity, explosive,

inflammable and strong magnetic field. The

performance of the Meter may deteriorate after

the meter is dampened.

n When using the test leads, keep your fingers

behind the finger guards.

- +

Rules For Safe Operation (2)

n Disconnect circuit power and discharge all high

-voltage capacitors before testing resistance,

continuity, diodes, or current.

n 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 and personal injury.

n Turn the Meter power off when it is not in use and

take out the battery when not using for a long

time.

n Constantly check the battery as it may leak when

it has not been used for some time, replace the

battery as soon as leaking appears. A leaking

battery will damage the Meter.

International Electrical Symbols

- +

AC (Alternating Current).

DC (Direct Current).

Both DC & AC.

Grounding.

Double Insulated.

Deficiency of Built-In Battery.

Continuity Test.

Diode.

Fuse.

Warning! Refer to the Operating Manual.

Caution ! Risk of Electric Shock.

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

( Figure 1)

1) TRANSFORMER JAWS :

Pick up the AC current flowing through the

conductor.

2) TRIGGER : Press the lever to open the trans-

former jaws When the lever is released, the jaws

will close again.

3) DATA HOLD SWITCH : A push switch (push ON/

OFF) Data-Hold switch will freeze reading when

pressed.

4) LCD DISPLAY : A 3½ digit display (maximum

reading 1999) indicates measured values, and

features symbols indicating function, Data - Hold,

Low Battery, Continuity, Diode.

5) FUNCTION SELECTOR : To Select ACV, ACA,

DCV, RESISTANCE,FREQUENCY (in model 2790).

The Clampmeter Structure (see figure 1)

Functional Buttons

Below table indicates the functional button

operations

Buttons

POWER

(Yellow Switch)

DATA HOLD

(Yellow Button)

Operation Performed

Turn the Meter on and off.

n Rotate the SWITCH to turn on the

Meter.

n Rotate the SWITCH to turn off

the Meter.

n Press DATA HOLD once to enter

hold mode.

n Press DATA HOLD again to exit

hold mode.

n In Hold mode, is displayed and

the present value is shown.

6) INPUT JACKS (VW and COM) :

Test leads are inserted into these jacks for Voltage,

Resistance, Frequency (in Model - 2790) measure-

ments and Continuity & Diode Checks.

7) DROP- PROOF WRIST STRAP :

Prevents the instrument from slipping off the hand

while in use.

Symbol

No.

Meaning

Dangerous Voltages.

The battery is low.

Warning : To avoide false

readings, which could lead to

possible electric shock or

personal injury, replace the

battery as soon as the battery

indicator appears.

Indicator for AC voltage or

current, The displayed value

is the mean value.

Indicates negative reading.

Test of diode.

Data Hold is active.

The continuity buzzer is on.

A : Amperes (amps). The unit

of current.

V : Volts. The unit of voltage.

Hz : frequency. The unit of

frequency (in Model 2790)

- +

Display Symbols (see figure 2)

( Figure 2)

220 200

Display Symbols (see figure 2)

NO.

MeaningSymbol

W, kW,

W : Ohm. The unit of

resistance.

KW : kilohm. 1 x 10 or

1000 ohms.

- +

( Figure 3 )

Red Black

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

Measurement Operation

n Make sure the Low Battery display is not on,

otherwise false readings may be provided.

n Pay extra attention to the symbol which is located

besides the input terminals of the Meter before carrying

out measurement.

A. DC voltage measurement (see figure 3)

Warning

To avoid harm to you or damages to the Meter from

electric shock, please do not attempt to measure

voltages higer than 1000V DC or 750V AC rms

although readings may be obtained.

1) Insert the red test lead into the VW input

terminal and the black test lead into the COM input

terminal

2) Set the rotary switch to an appropriate measurement

position in V range.

3) Connect the test leads across with the object being

measured.

The measured value shows on the display.

The DC Voltage ranges are : 2V, 200V and 1000V. To

measure DC voltage, connect the Meter as follows :

( figure 4)

Red Black

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

Caution :

n If the value of voltage to be measured is unknown,

use the maximum measurement position (1000V)

and reduce the range step by step until a satis-

factory reading is obtained.

n The LCD displays “1” indicating the existing

selected range is overloaded, it is required to

select a higher range in order to obtain a correct

reading.

n In each range, the Meter has an input impedance

of approx. 10MW . This loading effect can cause

measurement errors in high impedance circuits.

If the circuit impedance is less than or equal to

10kW , the error is negligible (0.1% or less).

n When DC voltage measurement has been

completed, disconnect the connection between

the testing leads and the circuit under test.

B. AC Voltage Measurement (see figure 4)

!Warning :

To avoid harm to you or damages to the Meter

from electric shock, please do not attempt to

measure voltages higher than 1000V or 750V

rms although readings may be obtained.

The AC voltage measurement has 2 measurement

positions on the rotary switch : 200V and 750V

To measure AC Voltage, connect the Meter as

follows :

1) Insert the red test lead into the VW Terminal

and the black test lead into the COM terminal.

2) Set the rotary switch to an appropriate

measurement position in V ~ range.

3) Connect the test leads across with the object

being measured.

The measured value shown on the display, is

effective value of sine wave (mean value response).

n If the value of voltage to be measured is unknown,

use the maximum measurement position (750V)

& reduce the range step by step until a satisfactory

reading is obtained.

Caution :

n When AC voltage measurement has been

completed, disconnect the connection between

the testing leads and the circuit under test.

n The LCD displays “ 1 “ indicating the existing

selected range is overloaded, it is required to

select a higher range in order to obtain a correct

reading.

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

(figure 5)

C. AC Current Measurement (see figure 5)

Never attempt an in-circuit current measurement where

the voltage between terminals and ground is greater

than 60V.

1) Open the jaw and place the conductor in the

center of the jaw for accurate measurement.

2) Set the rotary switch to an appropriate

measurement position in AC current range.

The measured value is shown on the display.

Warning

Use proper function, and range for the current

measurement.

The AC Current measurement has 3 measurement

positions on the rotary Switch: 20A, 200A, 300A,

600A* (in Model - 2790)

To measure AC Current :

Caution :

1) Place the switch in the 300A range position if the

measured current is unknown. Rotate the switch to

lower positions to get more accurate readings.

Red Black

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

(figure 6)

2) The LCD displays “ 1 ” indicating the existing

selected range is overloaded, it is required to

select a higher range in order to obtain a correct

reading.

3) When AC Current measurement has been

completed, Open the jaw to remove the

conductor & then Switch off the meter.

D. Resistance Measurement (see figure 6)

Warning

To avoid damages to the Meter or to the devices

under test, disconnect circuit power and

discharge all the high-voltage capacitors before

measuring resistance.

The resistance range has 2 measurement positions

on the rotary switch : 200W, 200kW

Red Black

2700

CLAMP METER

1000VDC

750VAC

MAX

COM VW

(Figure 7)

E. Measuring Diodes & Continuty (See figure 7)

Warning

To avoid damage to the Meter or to the equipment

under test, disconnect circuit power & discharge

all high-voltage capacitors before measuring

diodes and continuity.

Testing Diodes

Use the diode test function to check diodes,The diode

test sends a current through the semiconductor

junction, and then measures the voltage drop across

the junction. A good silicon junction drops between

0.5V and 0.8V.

2) Set the rotary switch to position.

To test a diode out of a circuit, connect the Meter

as follows :

1) Insert the red test lead into the VW terminal

and the black test lead into the COM terminal.

To measure resistance, connect the meter as follows

1) Insert the red test lead into the VW

terminal and the black test lead into the COM

terminal.

2) Set the rotary switch to an appropriate

measurement position in W range.

3) Connect the test leads across with the object

being measured.

The measured value shows on the display,

The test leads can add 0.1W to 0.3W of error to t h e

Resistance measurement. To obtain p r e c i s i o n

readings in low-resistance, that is the range of 200W,

short-circuit the input terminals before hand & record

the reading obtained (call this reading asX).(X) is

the additional resistance from the test lead.

Caution:

When there is no input, for example in open

circuit condition, the Meter displays “ 1 “.

When resistance measurement has been

completed, disconnect the connection between

the testing leads and the circuit under test.

Then use the equation :

Measured resistance value (Y) - (X) = precision

readings of resistance.

Note :

1) Never connect high voltage to the input sockets

with the switch in Resistance range.

2) Using Resistance measurement function in a live

circuit will produce false results and may da ma g e

the instrument. In many cases the suspect compo-

nent must be disconnected from t h e c ir c ui t t o

obtain an accurate reading.

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