Kyoritsu KEW 2500 Bruksanvisning

Kyoritsu Multimeter KEW 2500

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1 Safety warnings．

○ This instrument has been designed, manufactured and tested

according to IEC 61010: Safety requirements for Electronic

measuring apparatus, and delivered in the best condition after

passing quality control tests. This instruction manual contains

warnings and safety rules which have to be observed by the

user to ensure safe operation of the instrument and to maintain

it in safe condition. Therefore, read through these operating

instructions before using the instrument.

# WARNING

● Read through and understand the instructions contained in

this manual before using the instrument.

● Keep the manual at hand to enable quick reference

whenever necessary.

● The instrument is to be used only in its intended applications.

● Understand and follow all the safety instructions contained in

the manual.

It is essential that the above instructions are adhered to. Failure

to follow the above instructions may cause injury, instrument

damage and/or damage to equipment under test. Kyoritsu is by

no means liable for any damage resulting from the instrument in

contradiction to these cautionary notes.

○ The symbol # indicated on the instrument, means that

the user must refer to the related parts in the manual for

safe operation of the instrument. It is essential to read the

instructions wherever the symbol appears in the manual.

# DANGER : is reserved for conditions and actions that are

likely to cause serious or fatal injury.

# WARNING : is reserved for conditions and actions that can

cause serious or fatal injury.

# CAUTION : is reserved for conditions and actions that can

cause injury or instrument damage.

Please refer to following explanation of the symbols used on the

instrument and in this manual.

#User must refer to the explanations in the instruction

manual.

Instrument with double or reinforced insulation

Application around hazardous live conductors is NOT

permitted.

Crossed-out wheel bin symbol (according to WEEE

Directive: 2002/96/EC) indicating that this electrical product

may not be treated as household waste, but that it must be

collected and treated separately.

Instruction Manual # DANGER

● Never make measurements on a circuit in which earth

potentials of 42Vpk or higher exist.

● Do not attempt to make measurements in the presence of

flammable gasses. Otherwise, the use of the instrument may

cause sparking, which can lead to an explosion.

● Never attempt to use the instrument if its surface or your

hand is wet.

● Do not exceed the maximum allowable input of any

measuring range.

● Never open the Battery compartment cover during a

measurement.

● Never attempt to make any measurements if the clamp

sensor and/or the instrument has any structural abnormality,

such as a crack, or if the cover is not securely attached.

● Do not measure AC currents.

● The instrument should be used only in its intended

applications or conditions. Otherwise, safety functions

equipped with the instrument do not work, and instrument

damage or serious personal injury may be caused.

# WARNING

● Never attempt to make any measurements if any abnormal

conditions, such as a broken cover or exposed metal parts

are present on the instrument and clamp sensor.

● Do not install substitute parts or make any modifications to

the instrument. Return the instrument to your local

KYORITSU distributor for repair or re-calibration in case of

suspected faulty operation.

● Do not try to replace the batteries if the surface of the

instrument is wet.

● Ensure that the Clamp sensor is disconnected from the

object under test, and that the instrument is powered off

when opening the Battery compartment cover for battery

replacement.

# CAUTION

● Do not expose the instrument to direct sunlight, high

temperature, humidity or dew.

● This instrument is not water/ dustproof. Do not use it in a

dusty environment or where it will get wet.

● Always power off the instrument after use. Remove the

batteries if the instrument is to be stored and will not be in

use for a long period.

● Use a damp cloth with neutral detergent or water for cleaning

the instrument. Do not use abrasives or solvents.

○ Measurement Category

To ensure safe operation of measuring instruments, IEC 61010

establishes safety standards for various electrical environ-

ments, categorized as O to CAT IV, and called measurement

categories. Higher-numbered categories correspond to electrical

environments with greater momentary energy, so a measuring

instrument designed for CAT III environments can endure

greater momentary energy than one designed for CAT II.

O : Circuits which are not directly connected to the mains

power supply.

CAT II : Electrical circuits of equipment connected to an AC

electrical outlet by a power cord.

CAT III : Primary electrical circuits of the equipment connected

directly to the distribution panel, and feeders from the

distribution panel to outlets.

CAT IV : The circuit from the service drop to the service

entrance, and to the power meter and primary

overcurrent protection device (distribution panel).

2. Feature

● Instrumentation signal (DC4–20mA) measurement

● DC current (0-100mA) measurement without breaking the

electrical circuit.

● LED light for illuminating the measurement spot

● Auto-power-off function

● Percentage span

● Analog output function to output the measured results to the

recorder or digital multi-meter.

● Data hold function

3 Specification．

● Measuring range and accuracy (23ºC±5ºC, RH 75% or less)

(1) DC current (auto-range)

Range Display range Guaranteed

accuracy Accuracy Condition

20mA 0.00 to ±21.49mA 0.00 to ±21.49mA ±0.2%rdg±5dgt After Zero-

Adjustment

described at

clause 6 (1)

100mA ±21.0 to ±126.0mA ±21.0 to ±120.0mA ±1.0%rdg±5dgt

(2) Analog output function

To output DC voltage (10mV/mA) corresponding to the

reading.

Range Display range Output voltage Accuracy

20mA 0.00 to ±21.49mA 0.0 to ±214.9mV Accuracy specified at clause 3

(1) plus (±0.5mV)

100mA ±21.0 to ±126.0mA ±210 to ±1260mV Accuracy specified at clause 3

(1) plus (±3mV)

1300mV is output when the display showsOL. (-1300mV for-OL.)

See clause 6 for explanations on OL display.

* Output impedance : approx. 5kΩ

● Applicable

standards

IEC61010-1

Measurement CAT O (Other), Pollution degree 2

IEC61010-2-032

IEC61326 (EMC)

IEC60529 IP40

●Environmental

Standard

EU RoHS Directive compliant

● Display Liquid crystal display

(see also 4. Instrument layout)

● Refresh rate approx. once/ 0.6 second

● Location for use In-door use, altitude 2000m or less

●

Operating tempera-

ture & humidity

-10 to +50 RH85 or less (no condensation) ℃ ％

●

Storage tempera-

ture & humidity

-20 to +60 RH85 or less (no condensation)℃ ％

● Power source size AA battery x 4 pcs

(The use of alkaline LR6 is recommended.)

● Battery life approx. 60 hours continuous (with Backlight

and LED light OFF)

● Auto-power-off Power off function operates in 10 min. after

the last switch operation. This function is

disabled when a cord is being connected to

the OUTPUT terminal.

● Temperature

coefficients

Add 0.1 x specified accuracy/ ºC

(above 28ºC or below 18ºC)

Incoming wire

Ｏ:Device which is

not directly

connected to the

mains power supply

Socket

Interior wiring

●

Withstand voltage

AC2210V for 5 sec

(between electrical circuit and enclosure)

●

Insulation resistance

100M or more/ 1000V Ω

(between electrical circuit and enclosure)

● Rated voltage 42 Vpk (circuit – ground)

● Ф Conductor size max. 6mm

● Dimension 111(L) x 61(W) x 40(D)mm

● Weight approx. 290g (including batteries)

● Accessory Soft case MODEL9096 x 1 pce

Size AA Alkaline battery LR6 x 4 pcs

Instruction manual (Japanese/ English) x 1 pce

●

Optional accessory

Analog output cord MODEL7256

4 Instrument layout．

5 Getting started．

(1) Power on the instrument, and then check smooth opening and

closing of clamp sensor.

(2) Check the remaining battery level before making a measure-

ment. Press the Power button and get the instrument started.

When the battery empty indicator appears in the LCD, please

replace the batteries with new ones according to 8. Battery

replacement in this manual.

(3) Ensure that the Data hold function is not in active status.

6 Operating instructions．

# WARNING

● Do not clamp onto the un-insulated conductor.

● Always use the dedicated analog output cord MODEL 7256

when utilizing the analog output function.

# DANGER

● Keep your fingers and hands behind the barrier during a

measurement.

# CAUTION

● To avoid false reading, check that the Clamp sensor is clean

before starting to use the instrument.

● Bring the Clamp sensor close to the conductor under test

and zero adjust the display in order to minimize the influence

of electromagnetic waves.

● Take sufficient care to not to apply shock, vibration or

excessive force when opening and closing the clamp sensor.

Otherwise, accurate measured results may not be obtained.

Please open and close the sensor lightly.

(1) Zero Adjustment

Perform zero adjustment prior to starting a measurement. With

the transformer jaws closed and without clamping them onto the

conductor, press the Zero ADJ. button.

Then the Zero adjustment mark   is shown on the LCD for

about one second.

(2) Measurement

Press the Jaw trigger to open the transformer jaws and clamp

them onto the conductor under test and take the reading on the

display. (See the figure below.)

When the current flows in the

same direction as indicated by

the arrow mark on the jaws, the

polarity of the reading is positive

and vice versa.

* %(Span) display

The sub-display shows percentage value as the basis of 4mA is

0% and 20mA is 100%. (at 20mA Range only) The percentage is

displayed on the main display by pressing the DISP button. In this

case, the current value is displayed on the sub-display.

* When connecting the Analog output cord to the instrument, the

sub-display shows  OUT for 1 sec.

When making measurements for long periods of time:

- leave the instrument for the warm-up period of several tens of

minutes after powering it on, and then start a recording.

- readings will vary when the ambient temperature changes. In

this case, the temperature coefficients specified at clause 3 and

fluctuations at zero (about 20 counts fluctuate when temperature

changes by 10ºC) should be taken into consideration.

8 Battery replacement．

# WARNING

● Ensure that the Clamp sensor is disconnected from the

object under test, and that the instrument is powered off

when opening the Battery compartment cover for battery

replacement.

# CAUTION

● Do not mix new and old batteries or mix different types of

batteries.

● Install batteries in correct polarity as marked inside.

Replace batteries with the new

ones when the empty battery mark

  is displayed on the LCD.

The LCD does not show anything,

ev en t he em pty ba ttery ma rk,

when the batteries are completely

exhausted.

[ How to replace batteries ]

(1) Power off the instrument.

(2) Loosen the screw at the backside of the instrument and

remove the Battery compartment cover.

(3) Remove all the old batteries and install new ones, four size

AA batteries, in correct polarity. The use of alkaline batteries

(LR6) is recommended.

(4) Reattach the Battery compartment cover and tighten the

screw.

DC Milliamp Clamp Meter

KEW 2500

The table at the right shows the

relationship between %(Span)

values and the measured values

(mA).

T h e p e r c e n t a g e v a l u e i s

calculated based on the following

formula, assuming the measured

value as X.

Percentage = （）|X| - 4.00 ×6.25

Measured values (mA Percentage display (%)）

−20.00 100.0

0.00 25.0−

2.00 12.5−

4.00 0.0

12.00 50.0

20.00 100.0

100.0 −−−

* Over-limit indication

When the input exceeds the max measuring range (126.0mA),

"OL" or  -OL (for negative values) is indicated on the display.

When the Range reaches to the 100mA, bars (---) are displayed

instead of the percentage value.

7 Other functions．

7.1 Data Hold Function

This is a function to freeze the measured value on the display.

Press the Data hold button once to freeze the reading. The

reading will be held regardless of subsequent variation in input.

The Data hold mark " " is indicated on the display while the

instrument is in the Data Hold mode. To exit Data Hold mode,

press the Data hold button again.

7.2 Auto-power-off function

The instrument automatically powers off about 10 min after the

last operation. This function is disabled while the cord is being

connected to the analog output terminal. To disable this function

at all times, hold down the Data hold button while powering on the

instrument. The LCD shows P.oFF for about 1 sec immediately

after powering on the instrument. To restore this function, power

off once and power on again.

7.3 Backlight & LED light

Press the Light button to turn on or off the LED light and LCD

backlight. These lights automatically turn off after two minutes.

To disable the automatic light timeout, hold down the Light button

while powering on the instrument. The LCD shows  L.oFF for

about 1 sec immediately after powering on the instrument. To

restore this function, power off once and power on again.

7.4 Analog output function

DC voltage signal corresponding to the measured result is output

from the Analog output terminal. (10mV/mA) It can be checked on

a recorder or a digital multi-meter connected to the instrument by

using MODEL7256 output cord.

correct wrong

Screw

Battery

compartment

cover

Zero ADJ.

button

DISP button

(to switch displays)

Light button

LED light

Data hold button

Power button

Trigger

L CD

Analog output

terminal

Transformer Jaws

Polarity mark

Barrier

Main unit

Clamp sensor

Battery level indicator

Hold mark

Zero ADJ. mark

Barrier：It is a part providing protection against electrical shock and

ensuring the minimum required air and creepage distances.

Sub display

Main display

LCD

3-22 92-2078C

DISTRIBUTOR

Kyoritsu reserves the rights to change specifications or designs

described in this manual without notice and without obligations.

To digital multi-

meter or recorder

Analog output

cord M-7256

Produktspecifikationer

Varumärke:	Kyoritsu
Kategori:	Multimeter
Modell:	KEW 2500
Färg på produkten:	Zwart
Vikt:	3600 g
Bredd:	200 mm
Djup:	437 mm
Höjd:	450 mm
Snäll:	PC
Vormfaktor:	Midi Tower
På-/-Av-knapp:	Ja
Ursprungsland:	Zuid-Korea
Antal USB 2.0-portar:	2
Ljudingångar:	Ja
Ljudutgång:	Ja
Material:	Plastic, Steel
Maximalt luftflöde:	33.5 cfm
Antal portar USB 3.2 Gen 1 (3.1 Gen 1) Typ A:	1
Återställningsknapp:	Ja
Antal 3,5" fack:	2
Hårddiskstorlekar som stöds:	2.5, 3.5 "
Antal expansionsplatser:	7
Exponering:	Ja
Fläkthastighetskontroll:	Ja
Moderkortsformfaktorer som stöds:	ATX, Micro ATX, Mini-ITX
Sidofönster:	Ja
Maximal CPU-kylarhöjd:	158 mm
Maximal grafikkortslängd:	365 mm
Maximal PSU-längd:	160 mm
Maximalt antal främre fläktar:	3
Främre fläktar som stödjer diametrar:	120 mm
Maximalt antal fläktar överst:	3
Toppfläktar som stöder diametrar:	120 mm
Max antal bakre fläktar:	1
Bakre fläktar stödjer diametrar:	120 mm
Installerade bakre fläktar:	1x 120 mm
Antal främre fläktar installerade:	3x 120 mm
Maximalt antal bottenfläktar:	2
Bottenfläktar som stöder diametrar:	120 mm
Maximalt lufttryck:	1.17 mmH2O
Vätskekylningskapacitet:	Ja
Hårddisk/SSD-kombimodell:	Ja
RGB-kontrollratt:	Ja
Ledcontroller:	Ja
Dimensioner för främre kylare:	360 mm
Dimensioner för bakre kylare:	120 mm
Understödda toppradiatormått:	240 mm