KYORITSU 2009A User Manual

KEWSNAP

SERIES

KEWSNAP2009Ａ

DIGITALCLAMPMETER

KYORITSUELECTRICALINSTRUMENTS
WORKS，LTD.

INSTRUCTIONMANUAL

Contents

１．Safety Warnings ……………………………………………………… １
２．Features ……………………………………………………………… ４
３．Specifications ………………………………………………………… ５
４．Instrument Layout …………………………………………………… ９
５．Preparation for Measurement ……………………………………… 12

５−１ Checking Battery Voltage …………………………………… 12
５−２ Checking Switch Setting and Operation ……………………12

６．Measurement ………………………………………………………… 13

６−１ DC Current Measurement ……………………………………13
６−２ AC Current Measurement ……………………………………14
６−３ DC Voltage Measurement ……………………………………15
６−４ AC Voltage Measurement ……………………………………16
６−５ Resistance Measurement …………………………………… 17
６−６ Continuity Check ………………………………………………18
６−７ Frequency Measurement …………………………………… 18
６−８ Peak Measurement ………………………………………… 19
６−９ Average Measurement ……………………………………… 21

７．Other Functions ……………………………………………………… 22

７−１ Sleep Function ……………………………………………… 22
７−２ Data Hold Function ……………………………………………22
７−３ LoHz Function …………………………………………………23

７−４ OUTPUT Terminal …………………………………………… 23
８．Battery Replacement ………………………………………………… 26
９．Optional Accessories …………………………………………………27

―1―

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 starting using the instrument.

WARNING

●

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.

●

Be sure to use the instrument only in its intended applications and
to follow measurement procedures described in the manual.

●

Be sure to understand and follow all safety instructions contained

in the manual.
Failure to follow the above instructions may cause injury, instrument
damage and/or damage to equipment under test.

○

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 the instructions following

each symbol in this 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

minor injury or instrument damage.

―2―

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).
IndicatesDC(DirectCurrent).
IndicatesACandDC.

DANGER

●

Never make measurement on a circuit above 750VAC/1000VDC.

●

Do not attempt to make measurement in the presence of flammable
gasses, fumes, vapor or dust. 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 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.

WARNING

●N

ever attempt to make any measurement, if the instrument has any

structural abnormality such as cracked case and exposed metal part.

●

Do not turn the function selector switch with plugged in test leads
connected to the circuit under test.

●

Do not install substitute parts or make any modification to the
instrument. Return the instrument to Kyoritsu or your distributor for
repair or re-calibration.

●

Do not try to replace the battery if the surface of the instrument is wet.

●

Always switch off the instrument before opening the battery
compartment cover for battery replacement.

―3―

CAUTION

●

Make sure that the function selector switch is set to an appropriate
position before making measurement.

●

Always make sure to insert each plug of the test leads fully into the
appropriate terminal on the instrument.

●

Make sure to remove the test leads from the instrument before

making current measurement.

●

Do not expose the instrument to the direct sun, extreme temperatures
or dew fall.

●

Be sure to set the function selector 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 battery.

●

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, IEC61010

establishes safety standards for various electrical environments,

categorized as CATⅠ to CATⅣ, and called measurement

categories. Higher-numbered categories correspond to electrical

environments with greater momentary energy, so a measuring

instrument designed for CATⅢ environments can endure greater

momentary energy than one designed for CATⅡ.

CAT Ⅰ : Secondary electrical circuits connected to an AC electrical

outlet through a transformer or similar device.

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 over-current
protection device (distribution panel).

S

Incoming wire

CAT.IV

ocket

Interior wiring

CAT.III

Transformer

CAT.I

CAT.II

―4―

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

other tight places.

●Accurate true-RMS reading of AC current or voltage with distorted

waveform.

●LoHz mode automatically adjusts sample rate for easy reading of low

frequency AC current or voltage.

●Average function for easy reading of input with large variation.

●Auto-null function for easy zero adjustment.

●Provides frequency reading in AC current or voltage measurement.

●Auto-ranging feature on current, voltage and resistance ranges.

●Wide measuring range from 0 up to 2000A.

●Terminal cover to avoid the use of an incorrect terminal.

●PEAK function for measuring a peak of input

●Provides recorder output for long hour monitoring

●Data Hold function for easy reading in dimly light or hard-to-read

locations

●Sleep feature to extend battery life.

●Permits easy continuity check with a beeper

●Provides a dynamic range of 4,000 counts full scale

●Wide frequency range from 30Hz to 1kHz

●Uses shrouded transformer jaws to further improve safety

●Designed to CAT.Ⅲ 600VAC,DC / CAT.Ⅱ750VAC,1000VDC pollution

degree2 specified by the international safety standard:IEC61010.

２．Features

―5―

３．Specifications

Measuring Ranges and Accuracy (at 23±5℃, 45-75% relative humidity)
DC Current A

Auto-ranging (Defaults to Lo):
Lo:0-399.9A (Shifts to Hi at 400.0A)
Hi:150-2000A

(Shifts to Lo at 149A. At 2020A or above,"OL" is shown.)

AC Current 〜A (Crest factor(CF): 3.0 or less, peak current: 3000A or less)

Auto-ranging (Defaults to Lo) :
Lo:0-399.9A (Shifts to Hi at 400.0A)
Hi:150-2000A (Shifts to Lo at 149A. At 2020A or above, "OL" is shown.)

DC Voltage V (Input impedance: 2MΩ)

Auto-ranging (Defaults to Lo):
Lo:0-39.99V (Shifts to Mid at 40.00 V)
Mid:15.0-399.9V (Shifts to Lo at 14.9V and to Hi at 400.0V)
Hi:150-1000A

(Shifts to Mid at 149V. At 1020V or above, OL" is shown.)

Measuring Range (Auto-ranging)

０〜±399.9Ａ
±150〜±2000Ａ

Accuracy

±1.5％rdg±2dgt

Measuring Range (Auto-ranging)

0〜399.9Ａ
150〜1700Ａ
1701〜2000Ａ

Accuracy

±1.5％rdg±3dgt(50/60Hz)
±3.0％rdg±4dgt(30〜１kHz)
±3.5％rdg±3dgt(50/60Hz)

Measuring Range (Auto-ranging)

0〜±39.99Ｖ

±15.0〜±399.9Ｖ
±150〜±1000Ｖ

Accuracy

±1.0％rdg±2dgt

―6―

AC Voltage 〜V

(Crest factor(CF): 3.0 or less, peak voltage: 1200V or less)

Auto-ranging (Defaults to Lo):
Lo:0-39.99V (Shifts to Mid at 40.00V)
Mid:15.0-399.9V (Shifts to Lo at 14.9 and to Hi at 400.0V)
Hi:150-750V

(Shifts to Mid at 149V. At 770V or above,OL" is shown.)

Resistance Ω

Auto-ranging (Defaults to Lo):
Lo:0-399.9Ω (Shifts to Hi at 400.0Ω)
Hi:150-3999Ω

(Shifts to Lo at 149Ω. At 4000Ω or above, OL" is shown.)

Continuity Check Ω (Range fixed)

Frequency

OUTPUT(Output impedance: about 10kΩ)

Measuring Range (Auto-ranging)

0〜39.99Ｖ

15.0〜399.9Ｖ
150〜750Ｖ

Accuracy

±1.5％rdg±3dgt(50/60Hz)

±2.0％rdg±4dgt(30〜１kHz)

Measuring Range (Auto-ranging)

０〜399.9Ω
150〜3999Ω

Accuracy

±1.5％rdg±2dgt

Measuring Range

10〜399.9Ω

Accuracy

±1.5％rdg±2dgt

Measuring Range

０〜±399.9Ａ
±150〜±2000Ａ
０〜399.9Ａ

150〜1700Ａ
1701〜2000Ａ

Output Voltage(mVDC)

０〜±399.9mV
±15.0〜±200.0mV
０〜399.9mV

15.0〜170.0mV

170.1〜200.0mV

DC

AC

Accuracy

±1.5％rdg±3mV

±1.5％rdg±3mV(50/60Hz)
±3.0％rdg±3mV(40〜１kHz)
±3.5％rdg±3mV(50/60Hz)

Measuring Range

10〜3999Hz

Accuracy

±1.5％rdg±5dgt

―7―

●Operating System Dual Integration

●Display Liquid crystal display with a maximum

count of 4000 plus annunciators

●Overrange Indication "OL" is shown on the display

●Response Time Approx. 2 seconds.

●Sample Rate About 3 times per second.

●Location for use Indoor use, Altitude up to 2000m

●

Temperature and Humidity

23 +/-5℃, relative humidity up to 75%

for Guranteed Accuracy without condensation

●Operating Temperature 0-40℃, relative humidity up to 85%

and Humidity without condensation

●Storage Temperature -20-60℃, relative humidity up to 85%

and Humidity without condensation

●Power Source 6F22(DC9V) or equivalent battery

●Current Consumption Approx. 15mA max.

●Sleep function Automatically powered down in about 30

minutes after the last switch operation
(power consumption: about 200μA)

●Overload Protection

DC/AC current ranges: 2400A AC for 10sec
DC/AC voltage ranges: 1200V AC/DC for 10sec
Resistance range: 600V AC/DC for 10sec

●Withstand Voltage 5500V AC, 50/60Hz for 1 minute

between electrical circuit and housing
case or metal part of the jaws

●Insulation Resistance 10 MΩ or greater at 1000V between

electrical circuit and housing case or
metal part of the jaws

●Conductor Size Approx. 55㎜ diameter max.

●Dimensions 250(L)x105(W)x49(D)mm

●Weight About 530g

●Accessories Test leads M-7017

6F22 battery
Carrying case M-9094
Instruction manual
Recorder output Plug M-8201

●Optional Accessories Multi-Tran M-8008

Recorder M-5100A, etc.
Output Lead M-7014.

―8―

*EffectiveValue(RMS)

Most alternating currents and voltages are expressed in effective
values, which are also referred to as RMS (Root-Mean-Square) values.
The effective value is the square root of the average of square of
alternating current or voltage values.

Many clamp meters using a conventional rectifying circuit have "RMS"
scales for AC measurement. The scales are, however, actually
calibrated in terms of the effective value of a sine wave though the
clamp meter is responding to the average value. The calibration is
done with a conversion factor of 1.111 for sine wave, which is found by
dividing the effective value by the average value. These instruments
are therefore in error if the input voltage or current has some other
shape than sine wave.

*

CF (Crest Factor) is found by dividing the peak value by the effective value.

Examples:

DC: CF =1
Sine wave: CF=1.414
Square wave with a 1: 10 duty ratio: CF=3