Kusam-meco KM 233 Manuale utente

®®

AN ISO 9001:2015 COMPANY

MODEL - KM 233

TRMS

DIGITAL MULTIMETER

OPERATION MANUAL

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

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

Sales Direct : (022) 24156638

Tel. : (022) 24124540, 24181649. Fax : (022) 24149659

Email : [email protected]

Website : www.kusamelectrical.com

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

TRMS

DIGITAL MULTIMETER

MODEL - KM 233

TABLE OF CONTENTS

TITLE PAGE NO.

I. Safety...........................................................

II. Cenelec Directives......................................

III. Special Features.........................................

IV. General Specifications...............................

V. Electrical Specifications.............................

VI. Product Description...................................

VII. Maintenance...............................................

VIII. Test Certificate..........................................

IX. Warranty......................................................

I. SAFETY :

Terms in this manual :

WARNING : Identifies conditions and actions that could result in

serious injury or even death to the user.

This manual contains information and warnings that must be

followed for operating the meter safely and maintaining the meter

in a safe operating condition. If the meter is used in a manner not

specified by the manufacturer, the protection provided by the meter

may be impaired.

CAUTION : Identifies conditions and actions that could cause

damage or malfunction in the instrument.

WARNING :

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

product to rain or moisture. The meter is intended only for indoor

use.

Keep your hands/fingers behind the hand/finger barriers (of the

meter and the test probe assembly, where applicable) that

indicate the limits of safe access of the hand-held parts during

measurements. Inspect lead wires, connectors, and probes for

damaged insulation or exposed metal before using the meter. If

any defects are found, replace them immediately. Only use the

probe assembly provided with the meter or a UL Listed Probe

Assembly to the same meter ratings or better.

IEC 61010-031 requires exposed conductive test probe tips to be

≤ 4mm for CAT III & CAT IV ratings. Refer to the category markings

on your probe assemblies as well as on the add-on accessories

(like detachable Caps or Alligator Clips), if any, for applicable rating

changes.

Observe proper safety precautions when working with voltages

above 33 Vrms, 46.7 Vpeak or 70 VDC. These voltage levels pose

In other words, the meter will intelligently avoid entering the APO

a potential shock hazard to the user. Before and after hazardous

voltage measurements, check the voltage function on a known

source such as line voltage to determine proper meter functioning.

CAUTION

Disconnect the test leads from the test points before changing

functions.

Measurement Category IV is applicable to test and measuring

circuits connected at the source of the building's low-voltage

MAINS installation. Examples are measurements on devices

installed before the main fuse or circuit breaker in the building

installation.

Brief Information about Measurement Categories

INTERNATIONAL ELECTRICAL SYMBOLS :

Caution ! Refer to the explanation in this Manual

Caution ! Possibility of electric shock

Earth (Ground)

Meter protected throughout by Double Insulation or

Reinforced insulation

Fuse

Direct Current (DC)

Alternating Current (AC)

3 Phase Alternating Current

Marking of Electrical and Electronic Equipment (EEE).

Do not dispose of this product as unsorted municipal

waste. Contact a qualified recycler

Measurement Category III is applicable to test and measuring

circuits connected to the distribution part of the building's low-

voltage MAINS installation. Examples are measurements on

distribution boards (including secondary meters), 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 such as stationary motors with

permanent connection to the fixed installation.

Measurement Category II is applicable to test and measuring

circuits connected directly to utilization points (socket outlets

and similar points) of the low-voltage MAINS installation.

Examples are measurements on MAINS CIRCUITS of

household appliances, portable tools and similar equipment.

CENELEC DIRECTIVES :

The instruments conform to CENELEC Low-voltage directive

2014/35/EC, Electromagnetic compatibility directive

2004/108/CU and RoHS directive 2011/65/EU.

IV. GENERAL SPECIFICATIONS :

 Sensing : True RMS sensing

 Display : 3-5/6 digits 6,000 counts

 Update Rate : 5 per second nominal

o o

 Operating Temperature : -10 C to 45 C

 Relative Humidity : Maximum relative humidity 80% for

temperature up to 31 C decreasing linearly to 50% relative

humidity at 45 C.

 Altitude : Operating below 2000m.

o o

 Storage Temperature : -20 C ~ 60 C, < 80% R.H.

(with battery removed).

 Temperature Coefficient : Nominal 0.15 x (specified accuracy)/

o o o o o

C @ (-10 C ~ 18 C or 28 C ~ 45 C), or otherwise specified.

 Ingress Protection : Ip40

 Pollution Degree : 2

 Safety : Certified per IEC/UL/EN61010-1 Ed. 3.0,

IEC/UL/EN61010-2-030 Ed.1.0, IEC/UL/EN61010-2-033 Ed.1.0,

IEC/UL/EN61010-031 Ed. 1.1 and the corresponding.

CAN/CSA-C22.2 regulations to Measurement Categories:

CAT II 1000V, CAT III 600V and CAT IV 300V AC & DC.

 Transient Protection : 6.0kV (1.2/50s surge).

 E.M.C. : Meets EN61326-1:2013

In an RF field of 3V/m:

SPECIAL FEATURES :

 BeepLit™ Continuity

 Backlighted LCD

 EF-Detection (NCV)

 BeepJack™ on AmA/A

terminal

 VFD

 Auto-ranging MAX/MIN/

AVG Record

 Display Hold

Auto-ranging Relative 

Zero mode

Ohm function :

Total Accuracy = Specified Accuracy + 15 digits

Other functions :

Total Accuracy = Specified Accuracy

Performance above 3V/m is not specified

 Overload Protection :

A & mA : 0.4A/1000V DC/AC rms, IR 30kA, F fuse or better

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

V & AutoV : 1100V DC/AC rms

mV, Ohm & others : 1000V DC/AC rms

 Low Battery : Below approx. 2.5V

 Power Supply : 1.5V AAA Size battery X 2

 Power Consumption (typical) : 3.2mA

 APO Consumption (typical) : 10A

 APO Timing : Idle for 30 minutes

 Dimension : 161*80*50mm L*W*H (With Holster)

 Weight : Approx. 334 gm (With Holster)

 Accessories : Test lead pair; Batteries installed; User's manual.

 Optional Purchase Accessories : BMH-01 magnetic hanger;

BMP-25x soft carrying pouch.

ELECTRICAL SPECIFICATIONS :

Accuracy is given as (% of reading digits + number of digits) or

o o

otherwise specified @ 23 C  5 C ACV & ACA accuracies are

specified from 1 % to 100 % of range or otherwise specified.

Maximum Crest Factor <2:1 at full scale & <4:1 at half scale, and

with frequency components fall within the meter specified frequency

bandwidth for non-sinusoidal waveforms

AC VOLTAGE

Input Impedance: 10M, 54pF nominal

1) <5d non-zero residue may appear when backlight is on, which

will not affect the specified measuring range and accuracy

Accuracy

50Hz ~ 60Hz

600.0V ±(0.7%rdg+3dgts)

±(2.0%rdg+3dgts)

6.000V

1000 V

60.00V

45Hz ~ 440kHz

600.0V

60.00V

1000 V

6.000V

Range Resolution

1 mV

10 mV

100 mV

1 V

1 mV

10 mV

100 mV

1 V

DC VOLTAGE

ACmV

Input Impedance : 10M, 54pF nominal

1) <5d non-zero residue may appear when back light is on,

which will not affect the specified measuring range and

accuracy

2) Signal peak absolute values, including DC bias, less than

130mVpeak

3) Signal peak absolute values, including DC bias, less than

1300mVpeak

Input Impedance : 10M, 54pF nominal

Range

500Hz ~ 800Hz

10Hz ~ 500Hz

1)2)

60.00mV

Accuracy

±(2%rdg+3dgts)

±(1%rdg+3dgts)

600.0mV

1)2)

60.00mV

600.0mV

Resolution

Accuracy

±(0.3%rdg+2dgts)

±(0.4%rdg+2dgts)

±(0.2%rdg+2dgts)

60.00mV

600.0V

1000V

60.00V

600.0mV

6.000V

Range Resolution

10 V

100 V

10 V

100 V

10 V

100 V

1 mV

10 mV

100 mV

1 V

BeepLit™ Continuity Tester

Continuity Threshold : Between 30 and 480

Continuity ON Response Time : <15ms

Audible Indication : Beep sound

Visible Indication : LCD Backlight

Capacitance

Accuracies with film capacitor or better

±(1.5%rdg+2d)

±(1.5%rdg+8d)

Accuracy

2000nF

20.00nF

20.00F

200.0nF

200.0F

2000F

±(4.5%rdg+10d)

10.00nF

Range

Resolution

±(0.9%rdg+2d)

Diode Tester

Range Accuracy

3.000V

Test Current : 0.3mA typical

Open Circuit Voltage : < 3.2VDC typical

Resolution

10 pF

100 pF

1 nF

10 nF

100 nF

1F

10F

100 mV

1) Not specified for fundamental frequency > 400Hz

2) Accuracy linearly decreases from 1% + 3d @100Hz to

10% + 3d @400Hz

VFD_ACV (with Low Pass Filter )

Range

10Hz ~ 100Hz (Fundamental)

100Hz ~ 400Hz (Fundamental)

±(1.0%rdg+3d)

±(10%rdg+3d )

600.0V

1000V

Accuracy

1000V

Resolution

Ohm

1) Open Circuit Voltage : 1.6VDC typical

2) Constant Test Current : 0.2A Typical

3) Constant Test Current : 0.02A Typical

4) 5%+20d @ >30M

0.3% + 3d

Range

Accuracy

600.0

0.5% + 3d

60.00k

0.9% + 3d

6.000M

Resolution

6.000k

600.0k

60.00M

100 mV

1 V

100 mV

1 V

100 m

1

10

100 

1 k

10 k

DC Current

AC Current

Range

Burden Voltage

Accuracy

600.0A

6000A

60.00mA

600.0mA

6.000A

10.00A

0.1mV/A

1.9mV/mA

0.04V/A

1.0% + 3d

1.5% + 3d

0.7% + 3d

1.0% + 3d

10A continuous, >10A to 20A for 30 seconds max with

5 minutes cool down interval

Resolution

1) <5d non-zero residue may appear when backlight is on, which

will not affect the specified measuring range and accuracy

2) 10A continuous, >10A to 20A for 30 seconds max with 5 minutes

cool down interval

50HZ ~ 400HZ

100 nA

1 A

10A

100A

1 mA

10 mA

100 nA

1 A

10A

100A

1 mA

10 mA

Line Frequency

60mV

60V

600V

VFD 600V

VFD1000V

600A

60mA

1000V

50mV

10V

50V

500V

500A

50mA

10Hz - 50kHz

10Hz - 1kHz

10Hz - 5kHz

6A, 10A 8A 50Hz - 1kHz

10Hz - 1kHz

Range

Function Sensitivity (Sine RMS)

600mV

6000A

600mA

1. 3-5/6 digits 6000 counts

LCD display

2. Push-buttons for special

functions & features

Selector to turn the Power

On or Off and Select a

function

4. Input Jack for 10A (20A

for 30sec) current

function

Input Jack for all functions

EXCEPT A, mA & A current

functions

Common (Ground

reference) Input Jack for

all functions

Input Jack for A and mA

current function

V. PRODUCT DESCRIPTION :

Note : Top of the line model is used as representative for illustration

purposes. Please refer to your particular model for function

availability.

True RMS :

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

or equivalent DC value of an AC signal. True RMS is the 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 :

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

Crest Factor

Crest Factor is the ratio of the Crest (instantaneous peak) value

to the True RMS value, and is commonly used to define the

dynamic range of a True RMS DMM. A pure sinusoidal waveform

has a Crest Factor of 1.414. A badly distorted sinusoidal

waveform normally has a much higher Crest Factor.

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.

AutoV (LoZ) mode

AutoV automatically selects measurement function of DCV or

ACV, based on their input levels via the test leads. The input also

provides a low ramp-up impedance (LoZ) to drain ghost voltages*.

● With no input, the meter displays “- - - -” when it is ready.

● When a signal above the voltage threshold of 1V DC or

AC up to the rated 1000V is present, the meter displays the

voltage value in appropriate DC or AC, whichever larger in

peak magnitude.

*Ghost-voltage Buster: Ghost-voltages are unwanted stray signals

coupled from adjacent hard signals, which confuse common

multimeter voltage measurements. The AutoV mode provides low

(ramp-up) input impedance (approx. 2.1kΩ at low voltage) to drain

ghost voltages leaving mainly hard signal values on meter

readings. It is an invaluable feature for precise indication of hard

signals, such as distinguishing between hot and open wires (to

g r o u n d ) i n e l e c t r i c a l i n s t a l l a t i o n a p p l i c a t i o n s .

*Only HOLD, EF & Backlight push-button features are available

in AutoV mode.

Note :

VFD-ACV and the associated Hz are equipped with digital

low-pass filter (DSP), and are capable of handling VFD (Variable

Frequency Drives) signals for fundamental V & Hz readings.

It also improves ACV and Hz reading stability when being used in

most noisy electrical environments.

Line Frequency functions

Press the Hz push-button momentarily to toggle Hz function.

It is only available to Voltage and Current related ranges.

Input sensitivity varies automatically with the function range

selected while activating the Hz function. 6V function range has

the highest and the 1000V range has the lowest. When activated

under DCV, ACV or VFD-ACV voltage function, the trigger voltage

range will be displayed right before starting the Hz readings.

Press momentarily the RANGE button can manually select another

trigger voltage range (not available to current ranges). It is

recommended to first measure the signal voltage (or current) level

and activate Hz function in that range to get the most appropriate

trigger level. If the Hz reading becomes unstable, select lower

sensitivity to avoid electrical noise. If the reading shows zero,

select higher sensitivity.

AutoV mode input impedance increases abruptly from initial

2.1kΩ to a few hundred kΩ's on high voltage hard signals. “LoZ”

displays on the LCD to remind the users of being in such low

impedance mode. Peak initial load current, while probing 1000VAC

for example, can be up to 673mA (1000V x 1.414 / 2.1kΩ),

decreasing abruptly to approx. 2.4mA (1000V x 1.414 /

580kΩ) within a fraction of a second. Do not use AutoV mode

on circuits that could be damaged by such low input impedance.

Instead, use rotary selector or high input impedance voltage

modes to minimize loading for such circuits.

WARNING :

ACV, DCV & VFD-ACV 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.

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