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Kyoritsu Multimeter 2431

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Sida 1/4

Jaw Trigger

Range Switch

Data Hold Button

Transformer Jaws

Display

Frequency Selector Switch

INSTRUMENT LAYOUT

Barrier

INSTRUCTION MANUAL

DIGITAL AC LEAKAGE CLAMP METER

KEW SNAP 2431

KEW SNAP

SERIES

１．SAFETY WARNINGS

This instrument has been designed and tested according to IEC

Publication 61010; Safety Requirements for Electronic Measuring

Apparatus.This instruction manual contains warnings and safety rules

which must be observed by the user to ensure safe operation of the

instrument and retain it in safe condition. Therefore, read through these

operating instructions before using the instrument.

WARNING

ARNING

ARNINGWARNING

* Read through and understand instructions contained in this

manual before starting using the instrument.

* Save and keep the manual handy 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.

Failure to follow the 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 this cautionary note.

The symbol

indicated on the instrument means that the user must

refer to related parts in the manual for safe operation of the instrument.

Be sure to carefully read instructions following each

symbol in this

manual.

DANGER

DANGER is reserved for conditions and actions that are

likely to cause serious or fatal injury.

WARNING

ARNING

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 property damage.

Following symbols are used on the instrument and in the instruction

manual. Attention should be paid to each symbol to ensure your safety.

Refer to the instructions in the manual.

This symbol is marked where the user must refer to the instruction

manual

so as not to cause personal injury or instrument damage.



Indicates an instrument with double or reinforced insulation.

Indicates that this instrument can clamp on bare conductors when

measuring a voltage corresponding to the applicable Measurement

category, which is marked next to this symbol.



Indicates AC (Alternating Current).

DANGER

DANGERDANGER

* Never make measurement on a circuit above 300V AC. The

instrument is designed for measurement on a low-voltage circuit

below 300V AC.

* Do not attempt to make measurement in an explosive

atmosphere

(

i.e. in the presence of flammable gasses or fumes,

vapor or dust

)

* The transformer jaws are made of metal and their tips are not

insulated. Be especially careful about the hazard of possible

shorting where equipment under test has exposed conductive

parts.

* Never attempt to use the instrument if the instrument or your

hand is wet.

* Do not exceed the maximum allowable input value of any

measurement range.

* Never open the battery compartment cover when making

measurement.

* Never try to make measurement if any abnormal conditions,

such as broken Transformer jaws or case is noted.

* The instrument is to be used only in its intended applications or

conditions. Otherwise, safety functions equipped with the

instrument doesn’t work, and instrument damage or serious

personal injury may be caused.

Keep your fingers and hands behind the barrier during

measurement.

WARNING

ARNING

ARNINGWARNING

* Never attempt to make any measurement if the instrument has

any structural abnormality such as cracked case and exposed

metal part.

* Do not install substitute parts or make any modification to the

instrument. Return the instrument to Kyoritsu or your distributor

for service and repair to ensure that safety features are

maintained.

* Always switch off the instrument before opening the battery

compartment cover for battery replacement.

CAUTION

CAUTIONCAUTION

* Make sure that the range switch is set to an appropriate

position before making measurement.

* Be sure to set the range switch to the OFF position after use.

When the instrument will not be in use for a long period of

time, place it in storage after removing the batteries.

* Do not expose the instrument to the direct sun, extreme

temperatures or dew fall.

Use a damp cloth and detergent for cleaning the instrument.

Do not use abrasives or solvents.

Measurement categories (Over-voltage categories)

To ensure safe operation of measuring instruments, IEC 61010

establishes safety standards for various electrical environments,

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 : Primary 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).

O: Device which is

not directly

connected to the

mains power supply

Data Hold mode indicator

Unit of measured quantity

Low battery indicator

Frequency response of 50/60Hz

Frequency response of WIDE

２．FEATURES

* Digital clamp meter designed for measurement of AC leakage current.

* Tear-drop-shaped jaws for ease of use in crowded cable areas and

other tight places

* Data hold function to allow for easy readings in dimly light or hard-to-

read locations

* Filter function to remove harmonics generated by such equipment as

inverters

* Automatic power-off function to extend battery life

* Designed to CAT 300V and pollution degree specified by the Ⅲ ２

international safety standard,IEC 61010-1.

３．SPECIFICATIONS

Ranges

Accuracy

Frequency Selector Switch

WIDE position 50/60 position

20mA 0 19.99mA〜

± ±2.0%rdg 4dgt（）50/60Hz

± ±5.0%rdg 6dgt（〜）40 400Hz

± ±3.0%rdg 5dgt

（）50/60Hz

200mA 0 199.9mA〜

200A

0 100.0A〜

100.1〜

199.9A

± ±5.0%rdg 4dgt（）50/60Hz

± ±5.0%rdg 5dgt

（）50/60Hz

Overrange Indication '1' flashes on the highest digit ：

Response Time ：Approx. 2 seconds

Sample Rate Twice per second：

Location for us ：

Indoor use, Altitude up to 2000m

Data Hold For all ranges：

Storage Temperature & Humidity ： −10-50 , relative humidity up ℃

to 75%（）without condensation

Operating Temperature & Humidity： 0-40 , relative humidity up to ℃

85%（）without condensation

Power Source Two LR-44 or SR-44 batteries：

Current Consumption Approx. 5mA：

Battery Life ： Approx. 15 hours in continuous

use

Auto Power Off ： Automatically turns off approx.

10 minutes after power-on.

Safety Standards ： IEC 61010-1 CAT III 300V

Pollution degree 2

IEC 61010-2-32：

EMC Standards IEC 61326-1：

Environmental standards EU RoHS Directive compliant：

Overload AC300A for one minute：

Withstand Voltage 3470V AC for 5 seconds ：

between electrical circuit and

housing case

Conductor Size Approx. 24mm in diameter：

Dimensions 149：（L）×60（W）×26（）D mm

Weight Approx.120g：（）battery included

Accessories ： Instruction Manual, Two LR-44

batteries Carrying Case

４．OPERATlNG INSTRUCTIONS

−

1 AC Current Measurement

AC Current Measurement

AC Current MeasurementAC Current Measurement

DANGER

DANGERDANGER

* Never use the instrument on a circuit above 300V AC.

* The transformer jaws are made of metal and their tips are not

insulated. Be especially careful about the hazard of possible

shorting where equipment under test has exposed conductive

parts.

* Do not attempt to make measurement with the battery

compartment cover removed from the instrument.

* Keep your fingers and hands behind the barrier during

measurement.

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

ensuring the minimum required air and creepage distances.

CAUTION

CAUTIONCAUTION

* The transformer jaws, especially their tips, have been precisely

adjusted to obtain maximum accuracy. Take sufficient care to

avoid shock, vibration or excessive force when handling the

instrument.

* The transformer jaws do not fully close when a foreign

substance is stuck in the jaw tips or they do not properly engage

due to the excessive force applied. In such a case do not

release the jaw trigger suddenly or attempt to close the

transformer jaws by applying external force. Make sure that the

jaws close by themselves after removing the foreign substance

or making them free to move.

* The maximum size of a conductor to test is approx. 24 mm in

diameter. An accurate measurement cannot be made when the

transformer jaws are not fully closed on a conductor larger than

24mm.

* When measuring a large current, the transformer jaws may

buzz. This is not a fault nor affect the accuracy of the instrument.

(1) Set the range switch to a desired range. (Make sure that current to

measure does not exceed the upper limit of the range.)

(2) For normal measurement(Fig.1), press the jaw trigger to open the

transformer jaws and clamp onto one conductor only. Earth leakage

current and small current that flow through a grounded wire can also

be measured by this method. It is recommended that the conductor

is placed at the center of the closed transformer jaws.

(3) To measure out of balance leakage current(Fig.2), clamp onto all

conductors except a grounded wire. The leakage current measured

will be indicated on the display.

In a 4-wire system, clamp onto

all 4 wires.

In a 3-wire system, clamp onto all

3 wires.

Three-phase, 3-wire systems Single-phase, 2-wire systems

Fig. 1 Normal Measurement

Fig.2 Out-of-balance Leakage Current Measurement

4−2 How to Use Frequency Selector Switch

How to Use Frequency Selector Switch

How to Use Frequency Selector SwitchHow to Use Frequency Selector Switch

AC current to measure may have harmonics or high frequency

components generated by such equipment as inverters. To eliminate

these superimposed components and measure only the fundamental

frequency of 50Hz or 60Hz, Model 2431 has a low pass filter circuit,

which can be activated by setting the frequency selector switch to the

'50/60Hz' position.

The low pass filter has a cut-off frequency of 100Hz and an attenuation

characteristics of approx. -24dB/octave. When the filter is disabled,

'WIDE' is shown on the display. Pressing the frequency selector switch

enables the filter, indicating '50/60Hz' on the display. Press the switch

again to exit the '50/60Hz' mode.

All renges at WIDE Position

All ranges at 50/60Hz Position

（ー24dB/oct）

０

－１０

－２０

４０５０６０１００２００３００４００５００１Ｋ２Ｋ

５

１０

２０

３０

５０

１００

Fregue n cy ［ H z ］

Pe r centag e （％）

At tenuat ion（ dB）

Model 2431 Frequency characteristics is as shown below.

Fig.3

Note:

Note:Note:

-24/octave means that the magnitude of a signal declines by a factor of

16 when its initial frequency doubles.

The frequency selector switch has the following two positions.

WIDE（40Hz -）：Covers a wide range of frequency band from mains

supply to high frequencies generated by such equipment as inverters.

50/60Hz（40 - Approx. 100Hz Filter out high frequency components to ）：

restrict measurement in mains frequency band.

Recently there has been increased usage of power through inverters,

switching regulators, etc. When high frequency noise from such

appliances leaks or flows into the ground through capacitors not filtering

completely, the earth leakage breaker may trip. In such a case, the

instrument may not give current readings with the frequency selector

switch set to the 50/60Hz mode. Therefore, when in doubt as to the

presence of high frequencies or harmonics that affect AC leakage

current measurements, take current readings with the switch set to the

50/60Hz and WIDE modes respectively and then compare the results

obtained

−

3 Data Hold

Data Hold

Data HoldData Hold

(1) Push the Data Hold switch to freeze the reading. The 'H' symbol is

shown on the display, indicating that the instrument is in the Data

Hold mode.

(2) Push the switch again to exit the Data Hold mode.

−

4 Auto Power Off

Auto Power Off

Auto Power OffAuto Power Off

In approx. 10 minutes after it is turned on, Model 2431 automatically

turns power off and the display goes off. To exit the power-off state, turn

the range switch to the OFF position, then back to any desired range.

５．BATTERY REPLACEMENT

　When the display blanks or symbol "BATT" appears in the left lower

corner of the display, replace the batteries.

DANGER

DANGERDANGER

Never replace the batteries while making measurement.

(1) Set the range switch to the OFF position.

(2) Press in the hole on the battery compartment cover with the tip of a

pointed object, then slide open the cover.

(3) Replace the two batteries with new ones, observing correct polarity.

Replacement batteries should be type LR-44 or SR-44.

　　＊

The instrument does not operate if the polarity is set reversely.

(4) Slide the battery compartment cover in place.

This marking means they shall be sorted out and collected as

ordained in DIRECTIVE 2006/66/EC.

This directive is valid only in the EU. When you remove

batteries from this product and dispose them, discard them in

accordance with domestic law concerning disposal. Take a

right action on waste batteries, because the collection system

in the EU on waste batteries are regulated.

This instrument satisfies the marking requirement defined in

the WEEE Directive (2002/96/EC). This symbol indicates

separate collection for electrical and electronic equipment.

6-22 92-1470B

DISTRIBUTOR

MEMO

MEMOMEMO

MEMO

MEMOMEMO MEMO

MEMO

MEMOMEMO

Kyoritsu reserves the rights to change specifications or designs

described in this manual without notice and without obligations.

Produktspecifikationer

Varumärke:	Kyoritsu
Kategori:	Multimeter
Modell:	2431

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