Kyoritsu Electrical Instruments 2433 User manual

INSTRUCTION MANUAL

S

　10

Frequency〔Hz〕

KEW SNAP 2432

KEW SNAP 2433

LEAKAGE CURRENT TESTER

KEW SNAP Series

KEW SNAP 2432／2433

KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD.,

TOKYO, JAPAN

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 to retain it in safe condition. Therefore, read
through these operating instructions before starting using the
instrument.

●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.

Not following 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 of 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

WARNING is reserved for conditions and actions that can

CAUTION is reserved for conditions and actions that can

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).

●Never make measurement on a circuit having potential of
300VAC or greater.

●Do not attempt to make measurement in the presence of
flammable gasses. Otherwise, the use of the instrument may
cause sparking, which leads to an explosion.

●The transformer jaws are made of metal and their tips are not
completely insulated. Be especially careful about the possible
shorting where the equipment under test has exposed metal parts.

●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.

to cause serious or fatal injury.

cause serious or fatal Injury.

cause minor injury or Instrument damage.

WARNING

DANGER

ocket

WARNING

CAUTION

Interior wiring

Interior wiring

CA T.Ⅲ

Transformer
CA T.Ⅰ

Device which is

Ｏ:

not directly
connected to the
mains power supply

CA T.Ⅱ

●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 batteries if the surface of the
instrument is wet.

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

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

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

●Be sure to set the range 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 batteries.

●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

○Measurement Category:

safety standards for various electrical environments, categorized as CATⅠto

　To ensure safe operation of measuring instruments, IEC 61010 establishes

CATⅣ, and called measurement categories. Higher-numbered categories

safety standards for various electrical environments, categorized as O to

correspond to electrical environments with greater momentary energy, so a

CAT IV, and called measurement categories. Higher-numbered categories

measuring instrument designed for CATⅢ environments can endure greater

correspond to electrical environments with greater momentary energy, so a

momentary energy than one designed for CATⅡ.

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.

:

O

Circuits which are not directly connected to the mains power supply.

CAT.Ⅱ: Primary electrical circuits of equipment connected to an AC

CAT II : Electrical circuits of equipment connected to an AC electrical outlet

CAT III

CAT IV : The circuit from the service drop to the service entrance, and to the

electrical outlet by a power cord.

CAT.Ⅲ: Primary electrical circuits of the equipment connected directly to the

by a power cord.

distribution panel, and feeders from the distribution panel to outlets.

:

Primary electrical circuits of the equipment connected directly to the

CAT.Ⅳ: The circuit from the service drop to the service entrance, and to the

distribution panel, and feeders from the distribution panel to outlets.

power meter and primary over-current protection device
(distribution panel).

power meter and primary over-current protection device
(distribution panel).

Incoming wire

Incoming wire

CA T.Ⅳ

Socket

2. FEATURES

●Digital clamp tester for AC leakage measurement.

●Least affected by external magnetic field, providing wide
measuring range from very small to large currents.

●Designed to safety standard IEC 61010-2-032: Measurement
category CAT.Ⅲ, 300V and pollution degree 2.

●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 lit or hard-to­reach locations.

●Provides filtering function to remove high frequency generated by
such equipment as inverters.

●Peak hold function to allow for measurement of current variation
as short as 10msec.

●Auto-power-off function prevents unnecessary power consumption

●Dynamic range of 4000 counts full scale.

●Large easy-to-read LCD display with letter height of 13mm.

●Operation confirming beeps.

●Insulation barrier at the tip of transformer jaws for improved safety.

3. SPECIFICATIONS

Measuring ranges and accuracy

2432

2433

When measuring current which pulse element is superposed, differences
of the indicated value may be caused between ranges, if the peak value
exceeds the measurement range to a large extent. In this case, the
reading at the bigger range should be taken as a right value.
Counts equal to or less than 5 counts are corrected to zero.
The max indication at the 40mA/400mA range on MODEL2433 is 6000
counts. Minute current may exist while zero is displayed at 400A/400mA
range. Measurement should be made also at a lower range.

Operating System: Sequential comparison
Display: LCD with max. reading of 3999 (MODEL

Low battery warning: "BATT" mark appears on the display
Overrange Indication: "OL" appears on the display when upper limit

Response Time: Approx. 2 seconds
Sample Rate: Approx. 2.5 times per second
Location for use: Indoor use, Altitude up to 2000m
Accuracy-insured 23℃±5℃, relative humidity 85% or less
Temperature and (without condensation)
Humidity Ranges:
Operating Temperature 0-40℃, relative humidity 85% or less
and Humidity Ranges: (without condensation)
Storage Temperature -20-60℃, relative humidity 85% or less
and Humidity Ranges: (without condensation)
Power Source: Two 1.5V R03 (UM-4) batteries
Current Consumption: Approx. 13mA
Measurement Time: Approx. 40 hours
Auto-power-off Function:Turns power off about 10 minutes after the

Safety Standard: IEC 61010-2-032

Overload Protection: 2432: 120AAC max. for 10 seconds

Withstand Voltage: 3700VACrms (50/60Hz) for 1 minute between

Insulation Resistance: 10MΩ or greater at 1000V between metal

Conductor Size: Approx. 40mm in diameter max.
Dimensions: 185(L)×81(W)×32(D)mm
Weight: 2432: Approx. 290g including batteries

Accessories: Two R03 (UM-4) batteries

Optional Accessories: Multi-Tran Model 8004 and 8008

Model

Range
4mA
40mA
100A

40mA
400mA
400A

Measuring Range

0～3.999mA
0～39.99mA
0～80.0A

～100.0A

0～39.9mA
0～399.9mA
0～350.0A

～399.9A

2432 & MODEL2433's 400A range), 6000
(MODEL2433's 40mA/400mA range)

of measuring range is exceeded

last switch operation

Measurement CAT.Ⅲ 300V, pollution degree 2
IEC61326 (EMC)

2433: 480AAC max. for 10 seconds

3470

metal part of transformer jaws and housing
case (except transformer jaw case)

part of transformer jaws and housing case
(except transformer jaw case)

2433: Approx. 270g including batteries

Carrying case Model 9052
Instruction manual

Accuracy (Frequency range)
±1.0%rdg±5dgt （50/60Hz）
±2.5%rdg±10dgt （20～1kHz）
±1.0%rdg±5dgt （50/60Hz)
±2.5%rdg±10dgt （40～1kHz)
±5.0%rdg （50/60Hz）
±10.0%rdg （40～1kHz）
±1.0%rdg±5dgt （50/60Hz）
±2.5%rdg±10dgt （20～1kHz）
±1.0%rdg±5dgt （50/60Hz）
±2.5%rdg±10dgt （40～1kHz）
±2.0%rdg （50/60Hz）
±5.0%rdg （40～1kHz）

EN50581(RoHS)

5 sec. between

8008

4. INSTRUMENT LAYOUT

Transform Jaws

Barrier

●ＬＣＤ

Low Battery Warning

Frequency Response :
Wide

Frequency Response :
50/60Hz

Trigger

Range Selector Switch

Peak Hold Button

Data Hold Button

Hand Strap

Display

Frequency Selector Button

Data Hold Indication

Peak Hold Indication

Function

5. PREPARATIONS FOR MEASUREMENT

5-1 Checking Battery Voltage

Set the Range Selector Switch to any position other than the OFF
position. If the marks on the display is clearly visible without "BATT"
mark showing, battery voltage is OK. If the display blanks or "BATT"
is indicated, replace the batteries according to section 8: Battery
Replacement.

When the instrument is left powered on, the auto-power-off
function automatically shut the power off; The display blanks even
if the Range Selector Switch is set to a position other than the
OFF position in this state. To power on the instrument, turn the
Range Selector Switch or press the Data Hold Button. If the
display still blanks, the batteries are completely exhausted.
Replace the batteries.

5-2 Checking Switch Setting

Make sure that the Range Selector Switch is set to the appropriate
range.
Also make sure that data hold function is not enabled. If
inappropriate range is selected, desired measurement cannot be
made.

NOTE

6. OPERATING INSTRUCTIONS

6-1 Current Measurement

●In order to avoid possible shock hazard, never make measurement
on circuits having a potential of 300VAC or greater.

●The transformer jaws are made of metal and their tips are not
completely insulated. Be especially careful about the possible
shorting where the equipment under test has exposed metal parts.

●Never make measurement with the battery compartment cover
removed.

●When measuring current is 300A or more ( 400Hz or more ), be sure to
stop measurement within 5 minutes. Otherwise, transformer jaws may
heat to cause a fire or deformation of molded parts, which will degrade
insulation.

●Keep your fingers and hands behind the barrier during measurement.

●Take sufficient care to not to apply shock, vibration or
excessive force to the jaw tips. Otherwise, precisely adjusted
Transformer Jaw tips will be damaged.

●When a foreign substance is stuck in the jaw tips or they
cannot properly engage, the transformer jaws do not fully
close. In such a case, do not release the jaw trigger abruptly 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 be tested is 40mm in
diameter. Accurate measurement cannot be made on a
conductor larger than this, because the transformer jaws
cannot fully close.

●When measuring large current, the transformer jaws may buzz.
This has no effect on the instrument's performance or safety.

(1)Set the Range Selector Switch to the desired position. Current

to measure should be within the selected measuring range.

(2)Normal measurement (See Fig.1, 2):

Press the jaw trigger to open the transformer jaws and close
them over one conductor only. Measured current value is shown
on the display. Earth leakage current or small current that flows
through a grounded wire can also be measured by this method.

(3)Measuring out of balance leakage current (See Fig. 3):

Clamp onto all conductors except a grounded wire. Measured
current value is shown on the display.

Fig. 1 Load current Fig. 2 Earth leakage current

CAUTION

Load

DANGER

Load

Recently there has been increased use of power through inverters,
switching regulators, etc. When the high frequency noise from such

Load

3-phase 3-wire system
(In 4-wire system with neutral,
clamp onto all 4 wires)

Fig. 3 Measuring out of balance leakage current

Single-phase 2-wire system
(in 3-wire system with neutral,
clamp onto all 3 wires)

Load

6-2 How to Use Frequency Selector Button

When high frequencies from such equipment as inverters are
present in the circuit under test, the instrument measures AC
current of not only 50Hz or 60Hz of fundamental frequency but also
of these high frequencies and harmonics.

To eliminate the effect of such high frequency noise and measure
AC current of 50Hz or 60Hz fundamental frequency, a "high-cut"
filter circuit in incorporated into the instrument which works when
"50/60Hz" frequency response is selected with the Frequency
Selector Button. Cut-off frequency of the "high-cut" filter is about
160Hz with attenuation characteristic of approx. -24dB/octave.

When the Frequency Selector Button is pressed, "50/60Hz" mark is
shown on the left side of the display. When the Frequency Selector
Button is pressed again, fequency response is switched to WIDE
with "WIDE" mark shown on the display.

Output characteristic are shown in Fig.4.

Typical characteristic：
４/40/400mA Range

　0

Typical characteristic：

ー10

100/400A Range

Attenuation〔dB〕

ー20

ー30

Fig.4 KEW SNAP 2432/2433 Frequency Characteristic

Note:

Characteristic of -24dB/octiave means that signal magnitude
declines to about one sixteenth of that at the initial frequency when
frequency doubles. KEW SNAP 2432 and KEW SNAP 2433 have
the following two settings for the Frequency Selector Button.

WIDE (20Hz-): Permits measurement of currents of fundamental

50/60Hz (20-approx.160Hz): Filters out high frequency currents and

frequencies as well as currents of high frequencies
generated by such equipment as inverters

Typical characteristic：
“WIDE”frequency response

Typical characteristic：

“50/60Hz”frequency response

high-cut filter -24dB/oct

100％

50％

20％

10％

5％

5ｋ 1ｋ 2ｋ 500100 200502010

measures current of fundamental
frequency only

Percentage

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appliances leaks or flows into the ground through capacitors not
filtering completely, the earth leakage breaker may trip even though
there is no "actual" leakage. In such a case, the instrument do not
give leakage current reading if "50/60Hz" frequency response is
selected.

Take current readings with the 50/60Hz and WIDE frequency
responses respectively to make effective use of the Frequency
Selector Button.

6-3 Peak Current Measurement

(1)Set the Range Selector Switch to the desired position.(Current to

measure should not exceed the selected measuring range.)
(2)Select "WIDE"or "50/60Hz"with the Frequency Selector Button.
(3)With the transformer jaws clamped onto the conductor under

test, press the Peak Hold Button to set the interment to the peak

measurement mode.("P" is shown on the display.)
(4)The display reads 1/√2 of the peak current value. Therefore,an

rms reading is shown when current of a sinusoidal waveform is

measured.
(5)After peak measurement, press the Peak Hold Button to return to

the normal measurement mode.

Note: When leakage current is measured in the peak measurement

mode, the reading may change if the transformer jaws are
opened and closed. Please read the display with the conductor
under test clamped, otherwise, after fixing the display by using
the data hold function, please remove the instrument from the
conductor to be measured, and read the display. To measure
the peak current again, please release the data hold, and return
the instrument to the normal measurement mode once with the
Peak Hold Button, then set it in the peak measurement mode.

7. OTHER FUNCTIONS

7-1 Auto-Power-Off Function

This is a function to prevent the instrument from being left powered
on and conserve battery power. The instrument automatically turns
off about 10 minutes after the last switch or button operation. To
return to the normal mode, turn the Range Selector Switch to OFF,
then to the desired position.
Disabling Auto-Power-Off Function:
To disable the auto-power-off function, power on the instrument
with the Data Hold Button pressed. About 3 seconds after powering
on the instrument, "P.OFF" is shown on the display. To enable the
auto-power-off function, turn on the instrument without pressing the
Data Hold Button.
Note: The auto-power-off function is disabled in the peak
measurement mode.

7-2 Date Hold Function

This is a function to freeze the readings on the display. When the
Data Hold Button is pressed once, the current reading is held even
though current under test varies. "H" mark is shown on the upper
right corner of the display.
To exit the data hold mode, press the Data Hold Button again.
Note: When the auto-power-off function works while the instrument
is in the data hold mode, data hold is cancelled.

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8. BATTERY REPLACEMENT

In order to avoid possible shock hazard, always set the Range
Selector Switch to the OFF position before trying to replace the
batteries.

●Do not mix new and old batteries.

●Install batteries in the orientation as shown inside the battery
compartment, observing correct polarity.

When the battery voltage warning mark "BATT" is shown on the
top left corner of the LCD, replace the batteries. Note that the
display blanks and "BATT" mark is not shown if the batteries are
completely exhausted.

(1)Set the Range Selector Switch to "OFF."
(2)Loosen the battery-compartment-

cover-fixing screw on the lower
back of the instrument.

(3)Replace the batteries with two

new R03 (UM-4) 1.5V batteries.

(4)Put the battery compartment

cover back in place and tighten
the screw.

Note: For use for a long period of time,

use alkaline batteries.

WARNING

CAUTION

Screw

9. OPTIONAL ACCESSORIES

8008(Multi-Tran)

Model 8004 and 8008 (Multi-Tran)
These models help KEW SNAP 2432 or
KEW SNAP 2433 to measure current greater
than 3000A or to make measurement on a
large bus-bar or conductor.

(1)Set the Range Selector Switch to

"100A" or "400A."

(2)As shown, open the jaws and close

them over the pickup coil of Model
8004 or Model 8008.

(3)Clamp on a conductor with Model

8004 or Model 8008.

(4)Take the reading and multiply it by

10.

Max. Conductor Size

Max. Conductor Size

M-8004

M-8008

M-8008

Note: When used with Model 8008, KEW SNAP 2432 can measure up to

1000A.
Model 8004 and Model 8008 cannot be used for leakage current
measurement. For detailed specifications, refer to the instruction
manual for Model 8004 or Model 8008.

60mm in diameter

100mm in diameter

100mm in diameter

8008.

Transformer
jaws

Conductor

Measuring

Measuring

Range

Range

0～1000A

0 〜 3000A 10:1

0～3000A

Battery
Compartment
Cover

Batteries

M-8004

M-8008

M-8008

10

：

Pickup Coil

１

KEW SNAP 2432
KEW SNAP 2433

Current Transformation

Current Transformation

Ratio

Ratio

10:1
10:1

DISTRIBUTOR

Kyoritsu reserves the rights to change specifications or designs
described in this manual without notice and without obligations.

3-16

92-1452

92―1452H11―11

J