INSTRUCTION MANUAL
1. Features
●
Designed to meet international safety standards.
IEC61010-1.IEC61010-031 & IEC61010-2-032
Measurement Category (CAT.) IV 600V
Pollution Degree 2
●
Double molded main body provides comfortable
single handed grip
●
Data Hold Function
●
LCD Backlight function to facilitate working at dimly
lit situations.
●
REL function to indicate measurement variation
(Current, voltage, Resistance measurement)
●
MIN/MAX function enables easy reading of min &
max value during measurement.
●
PEAK Hold Function enables Peak value measure-
ment of starting current. (only at ACA Range)
●
With Continuity & Diode Check Function
●
Capacity measurement of capacitors
●
Temperature measurement, switchable between
℃
and
℉
●
NCV (Non Contact Voltage) Function for wiring check
●
600V input protection
●
Sleep Function to extend battery life
●
With Bar Graph, 6039 count display
2. 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 passed the inspection.
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
●
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.
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.
●
Marks listed in the table below are used on this
instrument.
#
User must refer to the manual.
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.
AC
DC
AC & DC
This instrument satisfies the marking
requirement defined in the WEEE Directive.
This symbol indicates separate collection for
electrical and electronic equipment.
#
DANGER
●
Never make measurement on a circuit in which
voltage over AC600V exists.
●
Do not attempt to make measurement in the
presence of flammable gasses. 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 attempt to use the instrument if its surface
or your hand is wet.
●
Do not exceed the maximum allowable input of
any measuring range.
●
N e v e r o p e n t h e B a t t e r y c o v e r d u r i n g a
measurement.
●
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
●
Never attempt to make measurement if any
abnormal conditions, such as broken case and
exposed metal parts are found on the instrument.
●
Do not rotate the Function Switch while the test
leads are being connected.
●
Do not install substitute parts or make any
modification to the instrument. For repair or re-
calibration, return the instrument to your local
distributor from where it was purchased.
●
Do not try to replace the batteries if the surface of
the instrument is wet.
●
Disconnect all the cords and cables from the
object under test and power off the instrument
before opening the Battery Cover for Battery
replacement.
●
Verify proper operation on a known source before
use or taking action as a result of the indication of
the instrument.
#
CAUTION
●
Set the Function Switch to an appropriate position
before starting measurement.
●
Firmly insert the test leads.
●
Disconnect the test leads from the instrument for
current measurement.
●
Do not expose the instrument to the direct sun,
high temperature and humidity or dewfall.
●
Altitude 2000m or less.
Appropriate operating
temperature is within 0
℃
and 40
℃
.
●
This instrument isn't dust & water proofed. Keep
away from dust and water.
●
Be sure to power off the instrument after use.
When the instrument will not be in use for a long
period, place it in storage after removing the
batteries.
●
Use a cloth dipped in water or neutral 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 CAT.
Ⅰ
to
CAT.
Ⅳ
, and called measurement categories.
Higher-numbered categories correspond to electrical
environments with greater momentary energy, so a
m e a s u r i n g i n s t r u m e n t d e s i g n e d f o r C AT.
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).
DIGITAL CLAMP METER
KEW SNAP
SERIES
KEW2046R 600A TRMS Type
KEW2056R 1000A TRMS Type
Incoming wire
Interior wiring
Transformer
CAT.I
CAT.II
CAT.III
CAT.IV
Socket
3. Specification
3-1. Measuring range & accuracy
(accuracy guaranteed at 23
℃
±5
℃
, humidity
45~85%) AC Current 600A, 1000A Function
Function
Measuring
Range
Accuracy
KEW2046R
KEW2056R
600A
0-600.0A
Peak 1500A
CF=2.5@600A
CF=3.0@500A
±2.0%rdg±5dgt(50/60Hz)
±3.5%rdg±5dgt(40~500Hz)
±5.5%rdg±5dgt(500~1kHz)
* Add 2% at CF>2
1000A
0-1000A
Peak 1500A
CF=2.5@600A
CF=3.0@500A
DC Current 600A, 1000A Function
Function
Measuring
Range
Accuracy
KEW2046R
KEW2056R
600A
0-600.0A
±1.5%rdg±5dgt
±1.5%rdg±5dgt
1000A
0-1000A
AC Voltage Function
(Auto-ranging, Input impedance: approx. 10M
Ω
)
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
6/60/600V 0-600.0V
±1.5%rdg±4dgt (50/60Hz)
±3.5%rdg±5dgt (40~400Hz)
DC Voltage Function
(Auto-ranging, Input impedance: approx. 10M
Ω
)
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
600mV/6/6
0/600V
0-600.0V
±1.0%rdg±3dgt
Resistance (Diode Check/ Continuity/ Capacity)
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
600
Ω
/6k/
60k/600k
Ω
0-600.0V
±1.0%rdg±5dgt
6M/60M
Ω
0.600-60.00M
Ω
±5%rdg±8dgt
Cont Buzzer 0-600.0
Ω
Buzzer sounds at 100
Ω
or less
Diode
Test voltage: 0-2V
Capacity Function
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
40nF
0.01nF
-4000
μ
F
Auto-ranging
the accuracy is not guaranteed
400nF
±2.5%rdg±20dgt
4
μ
F
40
μ
F
400
μ
F
the accuracy is not guaranteed
4000
μ
F
the accuracy is not guaranteed
Frequency/DUTY Function(Auto-ranging for Frequency)
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
ACA
40Hz-400Hz
±0.5%rdg±5dgt
ACV
1Hz
〜
10kHz
0.1-99.9%
(Pulse width/Pulse period)
±2.5%rdg±5dgt
Note: Measurable inputs are: 40Vrms@ACV or
50Arms@AC600A, 350A@AC1000A Range
Temperature Function
Range
Measuring
Range
Accuracy
KEW2046R
KEW2056R
℃
-50
℃
~ 0
℃
±5
℃
±3dgt
0
℃
~ 150
℃
±3
℃
±2dgt
150
℃
~ 700
℃
±2
℃
±2dgt
℉
-58
℉
~ 32
℉
±9
℉
±3dgt
32
℉
~ 302
℉
±5
℉
±2dgt
302
℉
~1292
℉
±2%±2dgt
Above specified accuracy is applied to Clamp meter
itself. Accuracy of Temperature probe is excluded.
3-2. General Specification
●
Mode of operation
:
△
Σ
mode
●
Display
: max. 6039 counts
(Frequency: 9999, Capacity &Temperature:4039)
& Bar graph
●
Over-range indication : "OL" displayed when exceeding
the measuring range.
(except for AC/DCV and 1000A Function)
●
Range switching
:
Auto-ranging/Voltage, Resistance, Capacity Range
Single range / Continuity, Diode check, DUTY and
Temperature
●
Sample rate
: three times per second
●
Functional construction :
OFF/ ACA/ ACV/ DCA/ DCV/
Ω
/
℃
/
℉
●
Keys
:
SELECT(AC/DC switching &/
Ω
/ / / ),
PEAK HOLD/ Back Light, REL
△
,Hz/DUTY, MIN/MAX
●
Power source
: DC3V/ R03(UM-4) x 2pcs
●
Low battery warning : "
" mark is displayed at
2.4V±0.15V or less.
●
Temperature & humidity : 23
℃
±5
℃
, relative humidity
accuracy guaranteed 85% or less (no condensation)
●
Operating temperature : 0~40
℃
, relative humidity 85%
& humidity range
or less (no condensation)
●
Storage temperature : -20~60
℃
, relative humidity
& humidity range
85% or less (no condensation)
●
Current consumption : approx. 25 mA
●
Sleep Function : Automatically powered off in about
15 min after the last Function switch operation.
Rotate the Function Switch from OFF to any
position to exit from the Sleep state.
●
Applicable Standards
IEC 61010-1 : 2001
Measurement CAT. IV 600V Pollution degree 2
IEC 61010-031:2002, IEC 61010-2-032
EMC
：
EN 61326
・
EN 55022
・
EN 61000-4-2 (performance criterion B)
・
EN 61000-4-3 (performance criterion B)
●
Overload Protection
Current Range
: 720A AC/ 10 sec@KEW2046R
1200A AC/DC/ 10 sec@KEW2056R
Voltage Range
: 720V AC/DC/ 10sec
Resistance Range : 600V AC/DC/ 10sec
●
Withstand Voltage
6880V AC
（
TRMS 50/60Hz
）
/ 5 sec
(between Jaws and electrical circuit/ between
internal circuit and enclosure)
●
Insulation Resistance: 10M
Ω
or more/ 1000V
（
between electrical circuit and enclosure
）
●
Conductor size
KEW2046R: approx. 33mm
KEW2056R: approx. 40mm
●
Dimension
approx. 254(L)×82(W)×36(D)mm / KEW2056R
approx. 243(L)×77(W)×36(D)mm / KEW2046R
●
Weight : approx 300g @ KEW2046R
310g @ KEW2056R
●
Accessories
Test Leads
Model 7066 / 1 set
Battery
R03
（
UM-4
）
/ 2pcs
Instruction manual English, Japanese / 1pce
Carrying Case
Model 9094 / 1pcs
●
Optional Accessories
K-type Temperature Probe Model 8216
Multi-Tran M-8008
●
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: Sine wave: CF=1.414
Square wave with a 1: 9 duty ratio: CF=3
3-3. Function Keys
The "
●
" mark shows available function at each
Range.
HOLD PEAK SELECT ZERO Hz/
DUTY
MAX/
MIN
ACA
●
●
●
●
●
●
ACV
●
-
-
●
●
●
DCA
●
-
●
●
-
●
DCV
●
-
-
●
-
●
Ω
●
-
●
●
-
●
-
-
●
-
-
-
-
-
●
-
-
-
●
-
●
●
-
-
TEMP
●
-
●
●
-
●
4. Preparation for measurement
4-1. Checking Battery Voltage
Set the Function Switch to any position other than
"OFF". When the display is clear without "BATT" mark,
showing battery voltage is enough. When the display is
blank or "BATT" mark is indicated, replace the batteries
according to Section 7, Battery Replacement.
#
CAUTION
The Sleep feature automatically powers the
instrument off in about 15 min after the last switch or
key operation. Therefore, the display may be blank
even with the Function Switch set to a position other
than "OFF". To operate the instrument in this case,
turn the switch back to the "OFF" position, then to
any other position. Replace the batteries if nothing
was displayed after above operations.
4-2. Checking Switch Setting & Operation
Confirm the Function Switch is set to the correct
position,the instrument is set to the correct
measurement mode,and the Data hold function is
disabled. Otherwise,desired measurement cannot be
made.
Waveform
Crest factor
CF
Average value
Vavg
Effective value
Vrms
Conversion
factor
Vrms/ Vavg
Reading errors for
average sensing
instrument
≒
0.637
≒
1.111
≒
1.414
≒
1.155
≒
1.732
＝
-3.8
％
×
100
％
＝
11.1
％
≒
0.707
2
1
2
2
π
A
3
D
1
3
2
D
1
3
A
0.5A
×
1.111-
3
A
A
A
A
A
1
0.5A
1
0
％
2 A
π
＝
AD
f
A
＝
A
・
D
T
2
A
A
×
1,111-A
×
100
×
100
D
A
D
1
＝
A
D
A
（
1.111
-1
）
D
A
0
A
0
A
0
A
0
T
D=f/T
f
3