Kusam-meco KM 255 Bedienungsanleitung

PC-Comm

MAX 0.6A

HBC FUSED

MAX 8A

HBC FUSED

ACOM

JACK

300V CAT IV

600V CAT III

1kV CAT II

Temp

JACK

mV A

Temp

Auto

Check

(Loz)

OFF

REC

CREST

SELECT

RANGE REL HOLD

AUTO

LoZ

MAX MIN

kHz

mVA

8888

DIGITAL

MULTIMETER

MODEL - KM 255 / KM 257

we damage them or “burn them out”. If you incorrectly

Title Page

Safety................................................................. 01

Cenelec Directives.............................................04

General Specifications.......................................04

Electrical Specifications..................................... 07

International Electrical Symbols.........................13

Product Description............................................14

Operation............................................................18

Maintenance......................................................32

Test Certificate...................................................35

Warranty.............................................................36

TABLE OF CONTENTS

V : Category II 1000V, CAT III 600V and

CAT IV 300V AC & DC.

mAmA : Category III 500VAC and 300VDC.

A : Category III 600VAC and 300VDC.

1) SAFETY

Terms in this manual

WARNING :

Identifies condition and actions that

could result in serious injury or even

death to the user.

CAUTION :

identifies conditions and action that

could cause damage or malfunction in

the instrument.

This manual contains information and warning that

must be followed for operating the instrument safely

and maintaining the instrument in a safe operating

conditions. If the instrument is used in a manner

not specified by the manufactures, the protection

provided by the instrument may be impaired. The

meter is intended only for indoor use.

The meter protection rating against the users, is

double insulation per IEC61010-1 2nd Ed.

EN61010-1 2nd Ed. UL61010-2nd Ed. and CAN/

CSA C22.2 No. 61010.1-1-0.92 to category II

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

Terminals ( to COM) measurement category:

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

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 IV (CAT IV) is for

measurements performed at the source of the low-

voltage installation. Examples are electricity meters

and measurement on primary overcurrent

protection devices and ripple control units.

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

Category

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 voltage 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, and probes for damaged insulation or

exposed metal before using the instrument. If any

defects are found, replace them immediately. 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 mA/mA or A input jack. Only 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.

Warning

CAUTION

The instruments conforms to CENELEC Low-voltage

directive 2006/95/EC and Electromagnetic

compatibility directive 2004/108/EC

?Display : 3-5/6 digits 6,000 counts

?Update Rate : 5 per second nominal

?24 Segments Bar graph :40 per second max.

?Operating Temperature : 0°C to 40°C

?Relative Humidity : Maximum relative

humidity 80% for temperature up to 31°C

decreasing linearly to 50% relative humidity

at 40°C

?Altitude : Operating below 2000m

?Storage Temperature : -20°C~60°C,

<80% R.H. (With battery removed)

?Temperature Coefficient : Nominal 0.15 x

(specified accuracy) / °C @ (0°C~18°C or

28°C~ 40°C), or otherwise specified.

?Sensing :

KM255 : Average sensing

KM257 : True RMS sensing

2) CENELEC DIRECTIVES

3) GENERAL SPECIFICATION

?Pollution Degree : 2

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

EN6100-1 2nd Ed., UL61010-1 2nd Ed. &

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

Category II 1000V, CAT III 600V and

CAT IV 300V AC & DC

?Transient Protection : 6.5kV (1.2/50ms surge)

?Terminals (to Com) Measurement Category :

V : Category II 1000V, CAT III 600V and

CAT IV 300V AC & DC.

mAmA : Category III 500VAC and 300VDC.

A : Category III 600VAC and 300VDC.

?E.M.C. : Meets EN61326 -1:2006 (En55022,

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

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

EN61000-4-5, 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

?Overload Protection :

mA & mA : 0.63A/500Vac, IR 150kA @500Vac

A : 10A/600Vac IR 100kA@600Vac

V : 1050 Vrms, 1450 Vpeak

AutoCheckä, mV, Ohm & others : 600 Vrms

?Low Battery : Blow approx. 2.3V

?Power Supply: 1.5V AAA Size battery x 2

?Power Consumption (typical): 3.5mA

?APO Consumption (typical) : 10mA

?APO Timing : Idle for 34 minutes

?Dimension :161(L) x 80(W) x 50(H)mm

(With Holster)

?Weight : Approx. 340 gm (With Holster)

?Special Features : AutoCheckäV&W;

Auto-ranging MAX / MIN record ; Crest mode

(Peak Hold), Backlighted LCD ; Auto-ranging

Relative Zero mode; Display Hold; EF-

Detection (NCV); Interface capabilities with

PC computer; Input warning detection.

?Optional purchase accessories :

USB interface kit BRUA-20; Magnetic hanger

BMH-01; BKB32 banana plug to type-K

socket plug adaptor.

?Accessories :

Test lead pair : batteries installed ;

user’s manual; BKP 60 banana

plug type-K thermocouple.

True RMS model KM257 ACV & ACA accuracies

are specified from 5% to 100% of range or other-

wise specified . Maximun Crest Factor <3:1 at full

scale & 6:1 at half scale, and with frequency

components fall within the meter specified

frequency bandwidth for non-sinusoidal waveforms.

AC Voltage

4) Electrical Specification

Accuracy is given as ±(%of reading digits + number

of digits) or otherwise specified @ 23°C±5°C and

less than 75% R.H.

Range

50Hz ~ 400Hz

60.00 mV

600.0 mV

6.000 V

60.00 V

600.0 V

1000 V

Resolution Accuracy

±(1.0%rdg + 5dgts)

CMRR : >60dB @ DC to 60Hz, Rs= 1kW

Input Impedance : 10MW, 50 pF nominal

DC Voltage

NMRR : >60dB @ DC to 50Hz / 60Hz

CMRR : >100dB @ DC, 50Hz / 60Hz; Rs= 1kW

Input Impedance : 10MW, 50 pF nominal

Range

60.00 mV

600.0 mV

6.000 V

60.00 V

600.0 V

1000 V

Resolution Accuracy

±(0.2%rdg + 3dgts)

10 mV

100 mV

1 mV

10 mV

100 mV

1 V

10 mV

100 mV

1 mV

10 mV

100 mV

1 V

AutoCheckä_ACV

AutoCheckäLo-Z ACV Thershold : >1V nominal

AutoCheckäLo-Z ACV input Impedance:

Initially approx. 2.5kW, 120pF nominal;

Impedance increases abruptly within a fraction of a

second as display voltage is above 50V(typical).

Ended up impedance vs display voltages typically are:

15kW@100V

100kW@300V

250kW@600V

375kW@1000V

Range

50Hz / 60Hz

1.000V~1000V

AutoCheckä_DCV

AutoCheck Lo-Z DCV Threshold :

>+1.0VDC & <-1.0VDC nominal.

AutoCheck Lo-Z DCV Input Impedance :

Initially approx. 2.5kW, 120pF nominal;

Impedance increases abruptly within a fraction of a

second as display voltage is above 50V(typical).

Ended up impedances vs display voltages typically are :

15kW@ 100V

100kW@ 300V

250kW@ 600V

375kW@ 1000V

Accuracy

±(1.4%rdg+5dgts)

Resolution

1mV~1V

Range

50Hz / 60Hz

1.000V~1000V

Accuracy

±(1.3%rdg+3dgts)

Resolution

1mV~1V

Resistance

Open Circuit Voltage : 0.45VDC typical.

Range

600.0 W

6.000 KW

60.00 KW

600.0 KW

6.000 MW

600.00 MW

Resolution Accuracy

±(0.5%rdg + 4dgts)

±(0.7%rdg + 4dgts)

±(1.2%rdg + 4dgts)

CREST Mode :

Accuracy : Specified accuracy plus 150 digits for changes

> 5ms in duration.

RECORD Mode :

Accuracy : Specified accuracy plus 100 digits for change

>100ms in duration.

Autocheck Ohm :

Range Accuracy

00.00W~ 60.00MW

±(1.2%rdg+10dgts)

Open Circuit Voltage : 0.45VDC typical.

1) TM

AutoCheck Ohm Threshold : < 10.00MWnominal

Audible Continuity Tester:

AudibleThreshold Response time

32ms

Between 10Wand 80W

100 mW

1 W

10 W

100 W

1 kW

10 kW

Resolution

10mW~10kW

AC Current

Range Resolution Accuracy

600.0 mA

6000 mA

60.00 mA

600.0 mA

6.000 mA

8.00 A

±(1.0%rdg + 3dgts)

Burden Voltage :

0.10mV/mA (600.0mA & 6000mA) ranges.

1.7mV/mA (60.00mA & 600.0mA) ranges

0.03V/A (6.000mA & 8.00A ) ranges.

1) 8A Continuous, > 8A to 15A for 30 Sec. Max. with

5 minutes cool down interval.

50Hz ~ 400Hz

10Hz - 50kHz

10Hz - 10kHz

10Hz - 50 kHz

10Hz - 1kHz

45Hz - 1kHz

Sensitivity

(sine RMS)

400 mA

400 V

40 mA

0.4 V

40 V

4 mA

6 A

1 A

4 V

Function

6000 mA

600 mA

600 V

1000 V

60 mA

6 V

60 V

6 A

10 A

Hz (Line ) @ ACV, DCV, Current & AutoCheckä

Range

Accuracy : 0.03% + 3d

100 nA

1 mA

10 mA

100 mA

1 mA

10 mA

Accuracies with film capacitor or better

Capacitance

Range

60.00 nF

600.0 nF

6.000 mF

60.00 mF

600.0 mF

3000 mF

Resolution Accuracy

±(2.0%rdg + 5dgts)

±(1.5%rdg + 5dgts)

±(2.0%rdg + 5dgts)

Diode Tester

Range Accuracy

Test Current : 0.56mA typical.

Open Circuit Voltage : <1.8VDC typically.

±(1.0%rdg + 3dgts)

1.000 V

DC Current

Range

600.0 mA

6000 mA

60.00 mA

600.0 mA

6.000 mA

8.00 A

Resolution Accuracy

±(0.5%rdg + 3dgts)

Burden Voltage :

0.10mV/mA (600.0mA & 6000mA) ranges.

1.7mV/mA (60.00mA & 600.0mA) ranges

0.03V/A (6.000mA & 8.00A ) ranges.

1) 8A Continuous, > 8A to 15A for 30 Sec. Max. with

5 minutes cool down interval.

10 pF

100 pF

1 nF

10 nF

100 nF

1 mF

Resolution

100 mV

100 nA

1 mA

10 mA

100 mA

1 mA

10 mA

Bar-Graph

Indication

Typical Voltage

Temperature

Range Accuracy

-50°C ~ 1000°C

-58°F ~ 1832°F ±(0.3%rdg + 6dgts)

±(0.3%rdg + 3dgts)

K Type Thermocouple range & accuracy not included.

Supplied Thermocouple suitable for measurement

upto 250°C.

Logic Level Hz (mV Function)

Range Sensitivity (square wave)

5.00Hz ~ 500.0kHz 3 Vpeak

Accuracy : 0.03% + 2d.

5.00Hz ~ 1.000MHz 5 Vpeak

Non-Contact EF-Dection :

440V (tolerance:250V~1000V)

220V (tolerance:124V~330V)

110V (tolerance:59V~165V)

55V (tolerance:23V~83V)

20V (tolerance:10V~36V)

Indication : Bar-graph segments & audible beep tones

proportional to the field strength.

Detection Frequency : 50 / 60Hz

Detection Antenna : Top-right end of the meter

Probe-Contact EF-Detection: For more precise indication

of live wires, such as distinguishing between live &

ground connections, use the Red (+) test probe for

direct contact measurements.

5) INTERNATIONAL ELECTRICAL SYMBOLS

Caution ! Refer to the explanation in this

Manual

Caution ! Risk of electric shock

Earth(Ground)

Double insulation or Reinforced insulation

Fuse

AC--Alternating Current

DC--Direct Current

Analog bar-graph

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.

Average sensing RMS calibrated

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.

True RMS

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, pluse trains, spikes, as well as

distorted waveforms with the presence of

harmonics. Harmonics may cause:

6) PRODUCT DESCRIPTION

Note: Top of the line model is used as representative

for illustration purposes. Please refer to your

respective model for function availability.

PC-Comm

MAX 0.6A

HBC FUSED

MAX 8A

HBC FUSED

ACOM

JACK

300V CAT IV

600V CAT III

1kV CAT II

Temp

JACK

mV A

Temp

Auto

Check

(Loz)

OFF

REC

CREST

SELECT

RANGE REL HOLD

AUTO

LoZ

MAX MIN

kHz

mVA

8888

1. 3-5/6 digits

6000 counts

LCD display

2. Push-buttons

for special

functions &

features

3. Selector to

turn the Power

On or Off &

Select a function

4. Input Jack for

milli-amp and

micro-amp

current functions

5. Input Jack for all functions EXCEPT current

(mA, mA, A) functions

6. Common (Ground reference) Input Jack for all

functions.

7. Input Jack for 8A (15A for 30sec) current

function

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

1) Overheated transformers, generators and

motors to burn out faster than normal

2) Circuit breakers to trip prematurely

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 1.4 A

badly distorted sinusoidal waveform normally has

a much higher Crest Factor.

Crest Factor

NMRR is the DMM’s ability to reject unwanted AC

noise effect that can cause inaccurate DC

measurements. NMRR is typically specified in

terms of dB(decibel). This series has a NMRR

specification of >60dB at 50 and 60Hz, which

means a good ability to reject the effect of AC

noise in DC measurements.

NMRR (Normal Mode Rejection Ratio)

Common mode voltage is voltage present on both

the COM and VOLTAGE input terminals of a DMM,

with respect to ground. CMRR is the DMM’s ability

to reject common mode voltage effect that can

cause digit rolling or offset in voltage

measurements. This series has a CMRR

specifications of >60dB at DC to 60Hz in ACV

function; and >120dB at DC, 50 and 60 Hz in DCV

function. If neither NMRR nor CMRR specification

is specified, a DMM’s performance will be

uncertain.

CMRR (Common Mode Rejection Ratio)

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