KEWSNAP
Series
KEWSNAP2413R
DIGITALCLAMPMETER
KYORITSUELECTRICALINSTRUMENTS
WORKS，LTD.
INSTRUCTIONMANUAL
Contents
１．Safety Warnings ………………………………………………………１
２．Features ………………………………………………………………４
３．Specifications …………………………………………………………５
４．Instrument Layout ……………………………………………………９
５．Operation
５-１ Preparation ………………………………………………………11
５-２ AC Current Measurement………………………………………11
５-３ How to Use Peak Hold Function ………………………………14
５-４ How to Use The Frequency Selector Switch…………………16
５-５ How to Use Data Hold Function ………………………………17
５-６ How to use Back Light …………………………………………17
５-７ Analogue Output How to Use Model 7073 Output Cord ……18
６．Battery Replacement …………………………………………………19
７．Cleaning ………………………………………………………………20
８．Before Sending For Repair …………………………………………21
―1―
１．SafetyWarnings
Make sure to read through this instruction manual before using this
instrument.
●The instrument has been designed, manufactured, and tested
according to:
IEC 61010, pollution degree 2, CAT．Ⅲ, 300V
IEC 61010, pollution degree 2, CAT．Ⅱ, 600Ｖ
This instruction manual contains warnings and safety rules which
must be observed by the use to ensure safe operation of the
instrument and to retain it in safe condition.
●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 instruction 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
bodily injury or instrument damage.
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.
●In order to avoid injury, or damage to the instrument or the circuit
under test, be sure to understand and follow all safety
instructions contained in the manual.
●Be sure to use the instrument only in its intended applications
and to follow measurement procedures described in the manual.
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.
DANGER
●Never make measurement on a circuit above 300V AC (CAT.Ⅲ).
●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.
●Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts,
however, extra precaution should be taken to minimize the
possibility of shorting.
●Never open the battery compartment cover when making
measurement.
●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 try to make measurement if any abnormal conditions, such
as broken Transformer jaws or case is noted.
●The instrument is 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
●Never attempt to make any measurement if any abnormal
conditions are noted, such as broken case, cracked test leads
and exposed metal parts.
●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.
―2―
―3―
CAUTION
●Make sure that the function selector switch is set to an
appropriate position before making measurement.
●Be sure to set the function selector switch to the OFF
position after use. When the instrument will not be use for a long
period of time, place it in storage after removing the battery.
This is to avoid damage to the instrument by possible leakage
from the battery.
●Do not expose the instrument to the direct sun, extreme
temperatures or dew fall.
●Placing the instrument in temperatures of 60℃ or higher can
cause the instrument's case to deform and result in operation
failures.
●Never apply voltage to the OUTPUT terminal. the terminal is not
electrically isolated from the internal circuits of the instrument.
○
Measurement categories
To ensure safe operation of measuring instruments, IEC61010
establishes safety standards for various electrical environments,
categorized as CAT.Ⅰ 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.
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).
Incoming wire
CAT.IV
Interior wiring
Transformer
CAT.I
CAT.II
CAT.III
S
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―4―
KEW SNAP 2413R is a unique digital clamp meter for both very low
current and high current measurements. Its shielded transformers jaws
minimizes the effect of external stray magnetic field, enabling leakage
current measurements.
●Measures from 0.1mA to 1000A AC and provides frequency response
higher than 1kHz on all measuring ranges.
Measurements also possible with approximately -7% accuracy at 20
kHz on 200mA range.
●Provides a frequency selector switch ― 50/60Hz or WIDE ―to turn
on or off an incorporated low pass filter. This permits current
measurement in mains fundamental frequency only or a wide range
of frequencies, including those from such devices as inverters.
●Peak-hold facility with selectable response time of 10ms or 100 ms.
●Two-way analogue output terminal
Provides AC voltage output proportional to the current under test for
monitoring the waveform with an oscilloscope.
Also convent AC current readings to DC voltage output for direct
connection to such devices as a chart recorder.
●Data hold function to allow for easy readings in hard-to-reach
locations. Display can be observed away from the conductor.
●LCD Back Light function to facilitate working at dimly lit situations.
２．Features
―5―
MeasuringRangesandAccuracy
●ACCurrent
３．Specifications
● EffectiveValue(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(CrestFactor)is found by dividing the peak value by the effective value.
Examples: Sine wave: CF=1.414
Square wave with a 1: 9 duty ratio: CF=3
Ranges
200mＡ
2Ａ
20Ａ
200Ａ
1000Ａ
0〜199.9mA
CF≦3.0
0〜1.999A
CF≦3.0
0〜19.99A
CF≦3.0
0〜199.9A
CF≦3.0
0〜500A
CF≦3.0
501〜1000A
CF≦3.0
Accuracy
FrequencyRangeResponse
50/60Hz
*onlysinewave
WIDE
*Add2%atCF≧2
±1.8％rdg±5dgt(50／60Hz)
±3.0％rdg±5dgt(40〜1kHz)
±2.0％rdg±5dgt(50／60Hz)
±3.5％rdg±5dgt(40〜1kHz)
±5.0％rdg (50／60Hz)
±2.5％rdg±5dgt
±3.0％rdg±5dgt
±5.5％rdg
10min.
TimeLimitfor
Measurements
Continuous
―6―
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