Kusam-meco KM 822EX Manuale utente

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

MODEL - KM 822EX

OPERATION MANUAL

INTRINSICALLY SAFE TRMS

DIGITAL MULTIMETER

An ISO 9001:2015 Company

OFFICE ADDRESS/SERVICE CENTER

Shop no.18, 1 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

March 2022

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

TAKE MEASUREMENTS CAREFULLY AND YOU’LL SPARE

YOUR METER AND YOURSELF, SOME PAIN.

Nearly every electrical engineer has a hand held Multimeter. We

sometimes take them for granted, until we damage them or “burn them

out”. If you incorrectly connect your DMM to a circuit or have the DMM 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.

DMM 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 DMM becomes a low impedance circuit element. If you

accidentally connect this low impedance path across your circuit, you’ll

effectively short-circuit it. You can, therefore send high current through

your meter and severely damage it. Unless the meter has a fused input,

you can even get an explosion or fire.

Even if you correctly insert your DMM into the circuit, you can still damage

your meter. Don’t try to measure current in excess of your meter’s

capacity. Handheld DMMs usually have a maximum current rating of 10A

or 20A.

To prevent excess current from flowing through your meter, always

disconnect the test leads from the circuit under test whenever you change

DMM functions, Set your meter to the correct function, say current and its

highest range for the setting, say 20A.

If you are measuring current in industrial environment, you can easily

exceed those ratings. The best way to avoid damage is to use a clamp

meter or to connect a clamp attachment to your DMM.

Next, connect the test leads before you apply power to the circuit. To be

safe, start by setting your meter to its highest range first.

1. SAFETY..............................................................................1

2. INTERNATIONAL ELECTRICAL SYMBOLS......................3

3. CENELEC DIRECTIVES....................................................3

4. FEATURES.........................................................................4

MARKING ON METER.......................................................4

10. WARRANTY......................................................................24

7. OPERATION.....................................................................15

8. MAINTENANCE...............................................................21

ELECTRICAL SPECIFICATIONS.......................................7

9. TEST CERTIFICATE........................................................23

6. PRODUCT DESCRIPTION..............................................13

5. SPECIFICATIONS..............................................................5

GENERAL SPECIFICATIONS............................................5

TABLE OF CONTENTS

TITLE

PAGE

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-01-

1) SAFETY

Terms in this manual

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.

The meter protection rating, against the users, is uble Do

insulation per IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1

2nd Ed. & CAN/CSA C22.2 No. 61010.1-0.92 to Category IV

1000Vac & Vdc.

This manual contains information and warnings that must be

followed for operating the instrument safely and maintaining the

instrument in a safe operating condition. If the instrument is used

in a manner not specified by the manufacturer, the protection

provided by the instrument may be impaired. The meter is

intended only for indoor use.

Terminals (to COM) measurement category:

V / mA A A : Category IV 1000VAC & VDCm /

Measurement Category IV (CAT IV) is for measurements

performed at the source of the low-voltage installation. Examples

are electricity meters and measurements on primary overcurrent

protection devices and ripple control units.

Per IEC61010-1 2nd Ed. (2001) Measurement Category

Measurement Category III (CAT III) is for measurements

performed in the building installation. Examples are

measurements on distribution boards, circuit- breakers, wiring,

including cables, bus-bars, junction boxes, switches, socket-

outlets in the fixed installation, and equipment for industrial use

and some other equipment, for example, stationary motors with

permanent connection to the fixed installation.

Measurement Category II (CAT II) is for measurements

performed on circuits directly connected to the low voltage

installation. Examples are measurements on household

appliances, portable tools and similar equipment.

WARNING

To reduce the risk of fire or electric shock, do not expose this

product to rain or moisture. To avoid electrical shock hazard,

observe the proper safety precautions when working with

voltages above 60 VDC or 30 VAC rms. These voltage levels pose

a potential shock hazard to the user. Do not touch test lead tips or

the circuit being tested while power is applied to the circuit being

measured. Keep your fingers behind the finger guards of the test

leads during measurement. Inspect test leads, connectors, &

probes for damaged insulation or exposed metal before using the

instrument. If any defects are found, replace them immediately.

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-02-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-03-

Do not measure any current that exceeds the current rating of the

protection fuse. Do not attempt a current measurement to any

circuit where the open circuit voltage is above the protection fuse

voltage rating. Suspected open circuit voltage should be checked

with voltage functions. Never attempt a voltage measurement

with the test lead inserted into the A/mA or A input jack. Only m

replace the blown fuse with the proper rating as specified in this

manual.

Disconnect the test leads from the test points before changing

functions. Always set the instrument to the highest range and

work downward for an unknown value when using manual

ranging mode.

2) CENELEC DIRECTIVES

The instruments conform to CENELEC Low-voltage directive

2006/95/EC and Electromagnetic compatibility directive

2004 /108 / EC

INTERNATIONAL ELECTRICAL SYMBOLS

DC--Direct Current

AC--Alternating Current

Double Insulation or Reinforced insulation

Earth (Ground)

!Caution ! Refer to the explanation in this Manual

Caution ! Risk of electric shock

Fuse

CAUTION

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-04-

SPECIAL FEATURES :

— Splash / Drop Proof

— 1000V AC / DC

— USB Interface

— Dual Display with Backlit

— Intrinsically Safe

— Beep-Jack Audible & Visible Input Warning

— Relative Zero Mode

— PC Interface Capability & Data Hold

— Ex-rating : Ex ib IIA T4 Gb / ib I Mb.

— Fuse 1A / 1kV (IR10kA)for mA & mA (1000V HRC Fuse)

— Fuse 11A / 1kV (IR20kA) for A (1000V HRC Fuse)

— These meters comply to IEC SANS 600790:2000 & IEC SANS

60079-11:1999, which is electrical apparatus for applicable for use

in explosive gas atmospheres. Part 0 (general requirements) &

part 1 (intrinsic). The approved explosive protection rating of this

equipment is suitable for use in Zone 1 hazardous area. Group I

(coal mines) underground & Group II (surface).

FEATURES :

— DC Voltage Basic Accuracy 0.08%

— 4 Digit 10,000 counts large easy to read Backlight LCD display

— Fast Measurements, 5/sec; Fully Auto-Ranging

— Logic & Line Level Frequency

— Logic Level Duty Cycle Readings & Diode Tester

— Fast Audible Continuity

— Auto Power Off

— MTEx-MS/19.0358 X

— Ex Rating: Ex ib IIA T4 Gb

— Ex ib I Mb.

— IP 64

MARKING ON METER:

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-05-

SPECIFICATIONS :

GENERAL SPECIFICATIONS :

Sensing : AC True RMS

9999 counts: ACV, DCV, Hz & nS Display :

6000 counts: mV, mA, mA, A, Ohm & Capacitance.

AutomaticPolarity :

Digital Display : 5 per second nominal;Update Rate :

41 Segments Bar-graph: 60 per second max

Below approx. 7VLow Battery :

0°C to 45°COperating Temperature :

Maximum relative humidity 80% for Relative Humidity :

temperature up to 31°C decreasing linearly

to 50% relative humidity at 45°C

2Pollution degree :

-20°C to 60°C, < 80% R.H. Storage Temperature :

(With battery removed)

Operating below 2000mAltitude :

nominal 0.15 x (specified accuracy) / Temperature Coefficient :

°C @(0°C ~ 18°C or 28°C ~ 45°C),

or otherwise specified.

Double insulation per IEC61010-1 2nd Ed., Safety :

EN61010-1 2nd Ed., UL61010-1 2nd Ed. &

CAN/CSA C22.2 No. 61010.1-0.92 to

Category IV 1000Vac & Vdc.

: 12kV (1.2/50ms surge)Transient protection

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-06-

Terminals (to COM) Measurement Category:

V/A / mAmA : Category IV 1000VAC & VDC

Overload Protections:

mA & mA : 0.44A / 1000V DC/AC rms, IR 10kA, F fuse

A : 11A / 1000V DC/AC rms, IR 20kA, F fuse

V : 1050Vrms, 1450V peak

mV, W , & others : 600V DC/AC rms

Meets EN61326-1:2006 (EN55022, EN61000-3-2, E.M.C. :

EN61000-3-3, EN61000-4-2, EN61000-4-3,

EN61000-4-4, EN61000-4-5, EN61000-4-6,

EN61000-4-8, EN61000-4-11)

In an RF field of 3V/m:

Capacitance function is not specified

Other function ranges:

Total Accuracy = Specified Accuracy + 100 digits

Performance above 3V/m is not specified

Single 9V battery.Power Supply : Alkaline

5 mA typicalPower Consumption :

Idle for 30 minutesAPO Timing :

50mA typicalAPO Consumption :

208(L) X103(W) X 64.5(H) mm with holsterDimension :

635 gm with holsterWeight :

Test lead pair; battery installed; user's manual Accessories :

& Carrying Case.

USB interface kit BU-86X; B MH-01 Optional accessories :

Magnetic Hanger.

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-07-

ELECTRICAL SPECIFICATIONS :

Accuracy is (% reading digits + number of digits) or otherwise

o o

specified, at 23 C 5 C & less than 75% relative humidity. ±

True RMS voltage & current accuracies are specified from 10 %

to 100 % of range or otherwise specified. Maximum Crest Factor

< 2:1 at full scale & < 4:1 at half scale, and with frequency

components within the specified frequency bandwidth for non-

sinusoidal waveforms.

AC VOLTAGE

Range Resolution Accuracy

40Hz ~ 500Hz

±(0.8% rdg + 4 dgts)

±(2.0% rdg + 4 dgts)

50Hz ~ 60Hz

60.00 mV

9.999 V ±(0.5% rdg + 3 dgts)

600.0 mV

99.99 V

999.9 V

60.00 mV

9.999 V

600.0 mV

99.99 V

999.9 V

±(1.0% rdg + 4 dgts)

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

1) Specified from 30% to 100% of range.

2) For 3kHz ~ 15kHz only

Input Impedance : 10MW, 50pF nominal

(80pF nominal for mV ranges)

500Hz ~ 1kHz

±(2.0% rdg + 3 dgts)

±(1.0% rdg + 4 dgts)

±(2.0% rdg + 4 dgts)

1kHz ~ 3kHz

3kHz ~ 20kHz

±(2% rdg + 3 dgts)

Unspec’d

60.00 mV

9.999 V

600.0 mV

99.99 V

999.9 V

60.00 mV

9.999 V

600.0 mV

99.99 V

999.9 V

±(2.0% rdg + 3 dgts)

±(3.0% rdg + 4 dgts)

60.00 mV

9.999 V

600.0 mV

99.99 V

999.9 V

3dB

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-08-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-09-

600.0 mA

60.00 mA

600.0 mA

±(0.6%rdg + 3dgts)

±(0.8%rdg + 6dgts)

±(1.0%rdg + 3dgts)

40Hz ~ 1kHz

0.08mV / mA

2.1mV / mA

0.02V / A

±(0.8%rdg + 4dgts)

1) 10A continuous, > 10A to 20A for 30 second max with 5 minutes cool down interval

AC & AC+ DC CURRENT

Range Resolution Accuracy

50Hz ~ 60Hz

6000 mA

6.000 A

10.00 A

Burden Voltage

600.0 mA

60.00 mA

600.0 mA

±(0.8%rdg + 6dgts)

±(1.0%rdg + 4dgts)

0.08mV / mA

2.1mV / mA

0.02V / A

6000 mA

6.000 A

10.00 A

0.1 mA

0.01 mA

0.1 mA

1 mA

0.001 A

0.01 A

0.1 mA

0.01 mA

0.1 mA

1 mA

0.001 A

0.01 A

±(0.12%rdg + 2dgts)

±(0.06%rdg + 2dgts)

±(0.08%rdg + 2dgts)

Input Impedance : 10MW, 50pF nominal

(80pF nominal for 600mV range)

DC VOLTAGE

Range Resolution Accuracy

60.00 mV

9.999 V

600.0 mV

99.99 V

999.9 V

0.01 mV

1 mV

0.1 mV

10 mV

100 mV

CAPACITANCE

Range 1)

Accuracy

60.00nF, 600.0nF

6.000mF

0.8% + 3d

1.0% + 3d

60.00mF

600.0mF

6.000mF

25.00mF

2.0% + 3d

3.5% + 5d

5.0% + 5d

6.5% + 5d

1) Accuracies with film capacitor or better

2) In manual-ranging mode, measurements not specified below 50.0mF, 0.54mF and

5.4mF for 600.0mF, 6.000mF and 25.00mF ranges respectively.

0.08mV / mA

2.1mV / mA

0.02V / A

1) 10A continuous, > 10A to 20A for 30 second max with 5 minutes cool down interval

±(0.2% rdg + 4 dgts)

DC CURRENT

Range Resolution Accuracy Burden Voltage

600.0 mA

60.00 mA

600.0 mA

6000 mA

6.000 A

10.00 A

0.1 mA

0.01 mA

0.1 mA

1 mA

0.001 A

0.01 A

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-10-

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-11-

AC 60.00mV

AC 600.0mV

AC 9.999V

AC 99.99V

AC 999.9V

AC 600.0mA

AC 6000mA

AC 60.00mA

AC 600.0mA

AC 6.000A

AC 10.00A

Accuracy : 0.04% + 4d

15.00 ~ 50.00kHz

15.00 ~ 10.00kHz

15.00 ~ 3.000kHz

40mV

60mV

2.5V

25V

100V

200mA

600mA

40mA

60mA

LINE LEVEL FREQUENCY (~Hz)

Function

Range Frequency Sensitivity

(sine Rms)

Open Circuit Voltage : < 1.2VDC (<1.0VDC for 60MW range)

RESISTANCE (OHMS)

Range

60.00 MW

6.000 MW

600.0 W

6.000 kW

60.00 kW

600.0 kW

Resolution Accuracy

±(0.1%rdg + 3dgts)

±(0.4%rdg + 3dgts)

±(1.5%rdg + 5dgts)

0.01 MW

0.001 MW

0.1 W

0.001 kW

0.01 kW

0.1 kW

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-12

Frequency 5.00Hz ~ 1.000MHz

Duty Cycle 0.00% ~ 100.0%

±(0.04%rdg + 4dgts)

2))

±(3d/kHz + 2d

LOGIC LEVEL FREQUENCY ( Hz) &

DUTY CYCLE (D%)

1) Sensitivity : 2.5Vp (Square wave) for 3V & 5V Logic Family

2) Specified Frequency : 5Hz ~ 10kHz

@DCmV

Function

Accuracy

Range

AUDIBLE CONTINUITY TESTER

Audible threshold

Response time

Between 20W and 300W

< 100ms

Test Current (Typically) : 0.4mA

Open Circuit Voltage : < 3.5V DC

2.000V ±(1.0%rdg + 1dgts)

DIODE TESTER

Range Accuracy

Accuracy :

Specified accuracy adds 250 digits for changes > 1.0ms

in duration

CREST MODE (INSTANTANEOUS PEAK HOLD)

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-13-

3) PRODUCT DESCRIPTION

1) 4 digits 9999 counts

dual displays

2) Push-buttons for special

functions & features

3) Selector to turn the

Power On or Off and

Select a function

4) Input Jack for 10A

(20A for 30sec) current

function

5) Common

(Ground reference)

Input Jack for all

functions

6) Input Jack for all

functions EXCEPT

current ( A, mA, A) m

functions

7) Input Jack for milli-amp

& micro-amp current

functions

The analog bar graph provides a visual indication of

measurement like a traditional analog meter needle. It is excellent

in detecting faulty contacts, identifying potentiometer clicks, and

indicating signal spikes during adjustments.

Analog bar-graph

PC-Comm

MAX 10A

HBC FUSED

JACK

OFF

D%nSF

KM 822EX

Intrinsically Safe TRMS DMM

AUTO

SELECT RANGE HOLD H

MAX 0.6A

HBC FUSED

T2T1

MAX

1000V CATIV

JACK

mAmAA COM WV

100

mmAV

MkWHz

R C H

MAX-MIN

kHz

nmSF

mVA

T1-T2

LoZ

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-14-

RMS (Root-Mean-Square) is the term used to describe the

effective or equivalent DC value of an AC signal. Most digital

multimeters use average sensing RMS calibrated technique to

measure RMS values of AC signals. This technique is to obtain

the average value by rectifying and filtering the AC signal. The

average value is then scaled upward (calibrated) to read the RMS

value of a sine wave. In measuring pure sinusoidal waveform, this

technique is fast, accurate and cost effective. In measuring non-

sinusoidal waveforms, however, significant errors can be

introduced because of different scaling factors relating average to

RMS values.

Average sensing RMS calibrated

True RMS is a term which identifies a DMM that responds

accurately to the effective RMS value regardless of the

waveforms such as: square, sawtooth, triangle, pulse trains,

spikes, as well as distorted waveforms with the presence of

harmonics. Harmonics may cause :

True RMS

1)Overheated transformers, generators and motors to burn out

faster than normal.

2)Circuit breakers to trip prematurely

3)Fuses to blow

4)Neutrals to overheat due to the triplen harmonics present on

the neutral

5)Bus bars and electrical panels to vibrate

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-16-

Normal forward voltage drop (forward biased) for a good silicon

diode is between 0.400V to 0.900V. A reading higher than that

indicates a leaky diode (defective). A zero reading indicates a

shorted diode (defective). An OL indicates an open diode

(defective). Reverse the test leads connections (reverse biased)

across the diode. The digital display shows OL if the diode is good.

Any other readings indicate the diode is resistive or shorted

(defective).

Discharge capacitors before making any measurement.

Large value capacitors should be discharged through an

appropriate resistance load.

CAPACITANCE, DIODE TEST FUNCTIONS

Press the SELECT button momentarily to select the subject

functions in sequence. Last selection will be saved as power up

default for repeat measurement convenience.

CAUTION FORWARD BIAS REVERSE BIAS

PC-Comm

MAX 10A

HBC FUSED

JACK

Auto

Check

OFF

KM 822EX

AC+DC TRUE RMS DMM

SELECT RANGE

CREST C

HOLD H

RECR

EFdBm-W/T -T

1 2

MAX 0.6A

HBC FUSED

T2T1

MAX

1000V CATIV

JACK

mAmAA COM WV

dBm

AUTO

PC-Comm PC-Comm

MAX 10A MAX 10A

HBC FUSED HBC FUSED

JACK JACK

mA mA

W W

V V

Auto

Check Auto

Check

OFF OFF

KM 822EX

AC+DC TRUE RMS DMM

KM 822EX

AC+DC TRUE RMS DMM

SELECT SELECT

RANGE RANGE

CREST CREST

C C

HOLD HOLD

H H

RECRREC R

EF EFdBm dBm-W/T -T

1 2 -W/T -T

1 2

MAX 0.6A MAX 0.6A

HBC FUSED HBC FUSED

T2T2

T1T1

MAX

1000V CATIV MAX

1000V CATIV

JACK JACK

mAmA mA mAA ACOM COMWVWV

! !

D% D%

dBm Hz

dBm

nS nS

V V

T1T1

T2T2

A A

Hz Hz

mAmA

Hz Hz

dBm Hz

dBm

Hz Hz

AUTO

V V

SELECT

“KUSAM-MECO” AN ISO 9001:2015 COMPANY

-15-

CAUTION

Using resistance and continuity function in a live circuit will

produce false results & may damage the instrument. In many

cases the suspected component must be disconnected from the

circuit to obtain an accurate reading.

W Resistance, Continuity functions

Press the SELECT button momentarily to select the subject

functions in sequence. Last selection will be saved as power up

default for repeat measurement convenience.

Continuity function is convenient for checking wiring

connections and operation of switches. A continuous beep tone

indicates a complete wire.

4) OPERATION

CAUTION

Before and after hazardous voltage measurements test the

voltage function on a known source such as line voltage to

determine proper meter functioning.

PC-Comm

MAX 10A

HBC FUSED

JACK

OFF

KM 822EX

Intrinsically Safe TRMS DMM

SELECT RANGE HOLD H

EFdBm-W/T -T

1 2

MAX 0.6A

HBC FUSED

T2T1

MAX

1000V CATIV

JACK

mAmAA COM WV

AUTO

PC-Comm

MAX 10A

HBC FUSED

JACK

OFF

SELECT RANGE HOLD H

EFdBm-W/T -T

1 2

MAX 0.6A

HBC FUSED

T2T1

MAX

1000V CATIV

JACK

mAmAA COM WV

dBm

SELECT

KM 822EX

Intrinsically Safe TRMS DMM

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