Instruction Manual

INTELLIGENT SOCKET TESTERKEW 4506

Contents
KEW 4506
1. Safety precautions ............................................................................. 1
2. Features .............................................................................................. 5
3. Instrument layout ................................................................................ 6
4. Accessories ........................................................................................ 9
5. Getting started .................................................................................... 9
6. Socket test ........................................................................................ 10
6-1 Outlet with earth pole [3P] .................................................... 10
6-1-1 N-E wiring check based on resistances of earth wire (E)and neutral wire (N) .......................................................... 11
6-1-2 N-E wiring check based on polarities of voltage signal
from signal source (KEW 8343) ...................................... 12
6-1-3 Socket test procedures....................................................... 13
6-1-4 Connection of KEW 8343 .................................................. 15
6-1-5 How to use KEW 4506 ....................................................... 25
6-2 2P outlet .................................................................................... 30
7. Settings ............................................................................................. 33
7-1 Disabling resistance measurement of earth wire (E) andneutral wire (N): 3P outlet ..................................................... 33
7-2 Buzzer and backlight settings ................................................ 34
8. LCD backlight ................................................................................... 35
9. Battery replacement ........................................................................ 36
10. Specifications ................................................................................... 37

1. Safety precautions
This tester has been designed, manufactured, and tested according
to IEC 61010 (CAT II 300V): Safety requirements for Electronic
measuring apparatus, and delivered in the best condition after
passing quality control tests.
This instruction manual contains warnings and safety rules
which must be observed by the user to ensure safe operation of
the tester and retain it in safe condition. Therefore, read throughthese operating instructions before starting to use the tester.
# DANGER● Read through and understand the instructions contained in thismanual before starting to use the tester.
● Keep the manual at hand to enable quick reference whenevernecessary.
● The tester is to be used only in its intended applications.
● Understand and follow all the safety instructions contained in
the manual.
● When using the optional KEW 8343 (Signal source) together
with KEW 4506,read the instruction manual for KEW 8343 as
well.
It is essential that the above instructions are adhered to.
Failure to follow the instructions may cause injury, instrument
damage and/or damage to the equipment under test. Kyoritsu is
by no means liable for any damage resulting from the tester incontradiction to these cautionary notes.
The symbol # indicated on the tester means that the user mustrefer to the related parts in the manual for safe operation of thetester. It is essential to read the instructions wherever the symbol
appears in the manual.

̶1̶

# DANGER : is reserved for conditions and actions that arelikely to cause serious or fatal injury.
# WARNING : is reserved for conditions and actions that cancause serious or fatal injury.
# CAUTION : is reserved for conditions and actions that cancause injury or instrument damage.
- Measurement (over-voltage) category To ensure safe operation of measuring instruments, IEC 61010
establishes safety standards for various electrical environments,
categorized as CAT O to CAT IV and called measurement
categories.
Higher-numbered categories correspond to electrical environmentswith greater momentary energy, so a measuring instrument
designed for CAT III environments can endure greater momentaryenergy than one designed for CAT II.
O (None, Other) : Circuits which are not directly connected to themains power supply.
CAT II: P rimary electrical circuits of the equipment
connected to an AC electrical outlet by a power
cord.
CAT III: P rimary electrical circuits of the equipment
connected directly to the distribution panel, andfeeders 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 themains power supply

̶2̶

# DANGER● U se the tester under operating conditions as specified;otherwise, the protection supplied by the tester can becompromised and damage itself or lead to a serious accident.
Verify proper operation on a well-known source before using thetester, or taking actions against the indication of the tester.
● This tester is rated to CAT II 300 V AC. (max. voltage to ground)D o not test the circuits which exceed this rating: circuits in which
300 V or higher voltage to ground exists.
●D o not attempt to operate this tester in an explosive atmosphere.
(e.g.: in the presence of flammable or explosive gasses orvapor)● Never attempt to use the tester if the tester or your hands arewet.
- Measurement ● Be careful not to short-circuit a power line with the metal tips of
KEW 4506 during a measurement. It may cause personal injury.
● Do not exceed the maximum allowable input of any measuring
range.
●N ever open the battery compartment cover during a measurement.
# WARNING● A lways verify the proper operation on a well-known powersource before starting to use the tester.
● If any breaks or cracks are noted on the tester or tip plugs, or
exposed metal parts are noted, do not use the tester.
● Press the test button after connected to the outlet to be tested.
● Never install substitute parts or make any modifications to thetester. Send the tester to your local KYORITSU distributor for
repair or recalibration.
● Do not try to replace batteries if the surface of the tester is wet.
● Firmly insert and attach the conversion adapter to the tip plugs
as necessary.
● W hen opening the battery compartment cover for battery
replacement, power off the tester and disconnect from theobject to be tested.

̶3̶

# CAUTION● Do not apply voltage to the tester while the tester is off.
● Do not attempt to operate the tester in dusty or wet place.
● Use the tester at a distance as far as possible from a strong
magnetic field or energized objects.
● N ever give shocks, such as vibration or drop, which may
damage the tester.
- Battery ● Brand and type of the batteries should be harmonized.
- After use ● Always power off the tester after use. Remove batteries if thetester is to be stored and will not be in use for a long period.
● D o not give vibration, shock, or drop the tester duringtransportation.
● Do not expose the tester to the direct sunlight, extremely hightemperature and humidity, or dew fall.
● Use a damp cloth with neutral detergent or water for cleaning
the tester. Do not use abrasives or solvents.
● If the tester is wet, make sure to let it dry before putting it intostorage.
The following symbols are marked and used on the tester or in this
instruction manual. Before starting to use the tester, please readand understand the meaning of each symbol.
Symbols
CAT IIElectrical circuits of equipment connected to an ACelectrical outlet by a power cord. (Primary side)Double or reinforced insulation#

User must refer to the explanations in the instruction
manual.

(Functional) EarthThis instrument satisfies the marking requirement
defined in the WEEE Directive. This symbol indicatesseparate collection for electrical and electronicequipment.
̶4̶

2. Features
This is a socket tester which can test wiring connection and findmiswiring in:* Single-phase 2-Wire, Single-phase 3-Wire systems,* 3 P outlet with earth pole in Three-phase 3-Wire 200 V(delta connection, L2(S) grounded) and Three-phase 4-Wirecommercial power line, and* 2P outlet.
For 3P outlet, it is possible to test whether the outlet is correctly
wired by using KEW 4506 together with KEW 8343 (signal source).
It is applicable to integrated earthing systems with low resistancessuch as TN, building structure, and common earth systems.
For a wiring system like TT system which has high integrated
earth resistance - resistance between N-E exceeds 2 Ω -, you justneed KEW 4506 to perform a test. The tester measures resistance
between earth pole (E) and neutral wire (N) and judges N-E
connection is correct or reverse. When NE reverse connection isdetected, LCD visually shows incorrect wiring. (e.g.: L-N Reverse or
E Non-connect, etc.)● Compatible with 3P and 2P* outlets* To connect the tester to 2P outlet, commercially available 3P/
2P conversion adapter is required.
● At 3P outlet testing, the tester measures resistance between
N-E and displays the value on the LCD. Test current is 10 mA
max, therefore, RCDs rated to 30 mA (sensitive current) don’t
trip unintentionally.
● If N-E resistance measurement function is turned off*, test is
performed with a test voltage applied from an optional signal
source only: current flows between N-E is less than 1 µA.
* If the function is disabled, KEW 4506 doesn’t show resistance
between N-E.
● LCD with backlight. It turns on/ off depending on the ambient
brightness.
● Compact and easy-to-use design● Tester automatically powers off after 10 minutes of no use. Thisfunction doesn’t work if 80 V or higher voltage is applied to thetester.
● It is possible to disable backlight and buzzer.
̶5̶

3. Instrument layout(1) KEW 4506 main unitFig. 3-1

Name

Description

Socket for①
test lead

Terminal to connect test lead with IEC connector.

② LED indicator

Indicates test result.
Judgement:
Correct...Green LED lights up.
Reverse.....Red LED lights up.

③ Test button

Test button with touch pad. Hold down 0.5 sec
or longer with a bare finger. * Tester measurespotential differences between the operator andN terminal by touching the pad at test andcheck miswiring.

④ 3P/2P button

Selects 3P or 2P. (“3P” is always on whenpowering on KEW 4506.)⑤ Power button

Powers on/ off KEW 4506 by holding down atleast 1 second.

⑥ LCD

With auto-backlight: turns on/ off automaticallydepending on the ambient brightness.

⑦

Illuminancesensor

Detects ambient brightness and automaticallyturns on/ off the LCD backlight.

̶6̶

(2) LCD

Fig. 3-2
Displayed segments and symbols
Testable and selectable socket system:* “” blinks only when testing for the first timewith default setting.
Ready to detect test voltage
Ready to measure N-E resistanceLow battery warning
Buzzer is disabled.
Appears during judgement is in progress.
Indicates voltage between L-N.
Indicates the following values based on themeasured N-E voltage.
- less than 8.0 V: resistances between
0.0 Ω and 1999 Ω- 8.0 V or higher: voltages between
8.0 V and 20.0 V.

̶7̶Indicates the measured values are out of display
range.
L-N voltage> 290V : Measured value is over 290 V.
< 80V : Measured value is less than 80 V.
N-E resistance> 1999Ω: Measured value is over 1999 Ω.
N-E voltage> 20.0V: Measured value is over 20.0 V.
Indicates N-E resistance measurement is disabled.
* Displayed only when the test voltage is used forwiring check.
Indicates the result is judged by test voltage
detection method.
Indicates correct wiring.
Indicates miswiring.
Indicates N-E connection is unjudgeable.
Indicates wiring errors are detected.
Indicates abnormal voltage across terminals.
Indicates incomplete connection.
Indicates miswiring or reverse connection terminal.

̶8̶

4. Accessories● Carrying case MODEL 9161
● Others:(1) KAMP10 (1500 mm) test lead with IEC connector/
MODEL 7284 (720 mm) test lead with IEC connector(2) Strap belt
(3) Two size AA Alkaline batteries(4) Instruction manual● Optional accessory
Signal source KEW 8343 (Diameter 24 mm)

5. Getting started
Before starting to use KEW 4506, check the following points.
See “9. Battery replacement” in this manual and insert batteries.
(1) Hold down power button 1 sec. to power on KEW 4506.
A long press (1 sec. or longer) is required to power on the tester
for safety purpose. A long press of power button is also required
to power off the tester.
isn’t displayed at the(2) Confirm that battery level indicator
upper left on the LCD.
Note
●U se of size AA Alkaline battery is recommended. The battery
may not be properly displayed if thelevel indicator
other types of batteries are used.
isBattery level is extremely low when the battery indicator
displayed on the LCD. To perform further measurements, pleaserefer to “9. Battery replacement” and replace batteries with new
ones.

̶9̶

6. Socket test
This tester is designed to perform wiring check for electrical outlet
sockets: 2P and 3P.
# DANGER● This tester is rated to CAT II 300 V AC (max. voltage to ground).
D o not test the circuits which exceed this rating: circuits in which
300 V or higher voltage to ground exists.
Note● When conducting a test, stand on the floor and do not touchanything other than the tester to measure electrical potentials
precisely when touching the touch pad on the tester.
● The tester may suddenly power off if you continue testing withis displayed on the LCD.
battery level warning indicator
6-1 Outlet with earth pole [3P]Note● The tester may show “E Non-connect”, although the outlet iscorrectly wired, if the earth resistance of the circuit under test
is high or voltage between L-E is extremely low due to large
leakage currents.
The tester measures the following values and judges whether walloutlets are properly wired or not.
(1) Voltages across terminals(2) P otential differences between N terminal and touch pad(operator)(3) Resistances of earth wire (E) and neutral wire (N)(4) Polarity of test voltage signal from signal source (KEW 8343)
As for (3) and (4) mentioned above, detailed explanations aredescribed in the following pages.

̶ 10 ̶

6-1-1 N-E wiring check based on resistances of earth wire (E)and neutral wire (N)RE (RE1 + RE2) in Fig. 6-1 includes earth resistance; therefore, theresistance value is higher than the RN (resistance of a neutral wire).
Compare the measured RE and RN and KEW 4506 judges as follows.
RE > RN……[PASS], RE < RN……[NE Reverse]
Power supply

LN

3P outlet

RN
E
RE2

RE1
RE=RE2+RE1

Fig. 6-1

NoteThis tester cannot be used as an earth resistance tester since thefrequency of test current is low: common earth resistance testers
may have different resistance measurement values.
If any of the conditions described in the following # CAUTION or
Note is applicable, it is recommended to use test voltage signal onlywith N-E resistance measurement function turning off. See “Outlet
with earth pole (3P), resistance of earth wire (E), and turning off
resistance measurement of neutral wire (N)” in “7. Settings”.
# CAUTION●A nti-trip-technology is applicable to RCDs rated to 30 mA or higher.
It’s not applicable to RCDs rated to 15 mA.
● RCDs rated to 30 mA or higher may trip if the circuit under test
has insulation resistance of 0.1 MΩ or less. It is recommended
to measure leakage current before conducting a test and add it
to test current of 10 mA max and confirm the total current value
doesn’t exceed the rated current.
● If insulation monitoring devices are installed, conducting a test
may activate the warning alarm. In such case, please contact
management company or owner of the test site.
̶ 11 ̶Note● When testing 3P outlet, do not connect multiple KEW 4506
at the same time. If testing outlets wired from the sametransformer simultaneously, correct judgement result may not
be obtained.
● On the following wiring systems, resistance value isn’t used forjudgment.
- voltage between N-E is 8 V or more- small differences in RN and RE (|RN－RE| ≦ 1 Ω)- low resistance between N-E(RN+RE ≦ 2 Ω)
- N-E resistance: over-range(RN+RE > 1999 Ω)
6-1-2 N-E wiring check based on polarities of voltage signal
from signal source (KEW 8343)
As shown in Fig. 6-2, apply test voltage to a neutral wire (N) via
signal source. Connect KEW 4506 to a 3P outlet and measure
the test voltage between N-E and then compare the phase of test
voltage and reference value to judge whether: the phase is thesame with the reference value [Correct] or 180-degree reverse(opposite to the reference value) [NE Reverse].
3P outlet

Power supply

N-E voltage

Test voltage

LN[correct]
Phase coordinate

E

L

N

[NE Reverse]
Reversed phase

E

Fig. 6-2

̶ 12 ̶

When testing wiring systems such as TT system, which has hightotal earth resistance (resistance between N-E is 2 Ω or higher),you just need KEW 4506 and measure resistances of earth pole (E)and neutral wire (N) to check N and E are wired properly.
To test wiring systems with low resistances such as TN, building
structure, and common earth systems, connect KEW 8343 to
the location close to the branch circuit breaker to which 3P outlet
under test is wired and apply test voltage. See “5. Wiring system”
described in the instruction manual for KEW 8343.
6-1-3 Socket test procedures
KEW 4506 conducts test in the following procedures.
VL-N
VL-E
VN-E
VMAX
●

*

RE
RN
RNE

: Voltage between L-N: Voltage between L-E: Voltage between N-E: The maximum voltage among L-N, L-E, and N-E: Measured voltage is 70% or higher than VMAX.
: Measured voltage is less than 70% of VMAX.
: Resistance of earth pole (E): Resistance of neutral wire (N): Resistance between neutral wire (N) and earth pole (E)̶ 13 ̶Line voltage test

L-N voltage: ●/＊/＊
L-E voltage: ●/＊/＊
N-E voltage: ●/＊/●

＊
●
＊

●
＊
＊

＊/●
●/＊
●/●

●
●
＊
Potential differences
detected.

Touch padtest

Touch padtest

No potential
differences.

L-E Reverse L-N Reverse

Abnormal Volt.

VN-E≧8V

N-E Volt.
test 1

VN-E＜8V
RN＜RE

N-E Volt.
test 2

No potential
differences.

|RN-RE|≦1Ω
or RNE≦2Ω
or RNE≧2000Ω

VN-E＜20V

VN-E≧20V

RN＞RE

Resistancetest

Positive

Negative

Test Volt.
signal test

Undetectable
N-E
unjudgeable(>20 V)

Correct

N-E Reverse

N-E
unjudgeable

Fig. 6-3
̶ 14 ̶

6-1-4 Connection of KEW 8343
！ To obtain accurate result:Clamp a neutral wire (N) with test voltage injection clamp observing
the orientation shown below: arrow mark on the clamp shall be
towards the outlet. Ensure that the transformer jaws are firmly
engaged and closed.
Power source side

Arrow markOutlet side				Fig. 6-4

Note●T o apply test voltage correctly, check the size of conductor to betested - the maximum measurable conductor size is approx. 24 mm- so that the jaws close completely.

̶ 15 ̶Note● As shown in Fig. 6-5, the phase of test voltage applied toa neutral wire (N) changes 180-degree depending on theorientation of the test voltage injection clamp. KEW 4506
performs socket test based on the polarity (phase difference)of the test voltage signal; therefore, if the orientation of test
voltage injection clamp is incorrect, KEW 4506 judges as [NE
Reverse] even if the tested socket is correctly wired.

[NE Reverse][correctly wired]Fig. 6-5● It is impossible to test ungrounding system (floating power
supply) which is mainly utilized in hospital, sound room, and
UPS (Uninterruptible Power Supply) because test voltage
cannot be applied to.
Power supply
KEW8343

Fig. 6-6
̶ 16 ̶Note●S
 ocket test cannot be performed if a neutral wire (N) connected
to ground is closer to the outlet to be tested than the clamp
position of test voltage injection clamp.
Power supply
KEW8343

Fig. 6-7● KEW 8343 and KEW 4506 (Socket tester) cannot perform
socket test if they are connected to:*a live phase and in which one voltage phase is different fromother phases in Three-phase 4-wire system (wye or deltaconnection).
That is, if you make connections as illustrated on the next page(Fig. 6-9 and Fig. 6-10) for the wiring systems described below,
correct measurement result cannot be obtained.

Fig. 6-8
̶ 17 ̶Power supply

KEW8343

Fig. 6-9

Power supply

KEW8343

Fig. 6-10
̶ 18 ̶Single-phase 2-Wire
Clamp the neutral wire (N) with test voltage injection clamp andblack voltage detection cable to neutral wire (N) and red voltage
detection cable to hot/live wire (L).
Power supply

Red

Black

KEW8343

Fig. 6-11

̶ 19 ̶Single-phase 3-Wire
Clamp the neutral wire (N) with test voltage injection clamp andblack voltage detection cable to neutral wire (N) and red voltage
detection cable to hot/live wire: either L1 or L2 correctly. Then you
can test any 3P sockets which are connected to L1 or L2.
Power supply

Black

Red
KEW8343

Fig. 6-12

̶ 20 ̶

Three-phase 3-Wire 200 V (delta connection, L2(S) grounded)
Clamp the grounded L2(S) with the test voltage injection clamp andconnect the black voltage detection cable to L2(S) and red voltage
detection cable to a hot/live wire: either L1(R) or L3(T) correctly.
Then you can test any 3P outlets which are connected to L1(R) or
L3(T).
Power supply

Black
Red
KEW8343

				Fig. 6-13

̶ 21 ̶

Three-phase 4-Wire
Clamp the neutral wire (N) with test voltage injection clamp andblack voltage detection cable to neutral wire (N) and red voltage
detection cable to hot/live wire: either L1(R), L2(S), or L3(T)correctly. Then you can test any 3P outlets which are connected to
L1(R), L2(S), or L3(T).
Power supply

Black
Red
KEW8343					̶ 22 ̶

Fig. 6-14

Note● C heck the wiring diagram before making connections andidentify the branch circuit breaker to which 3P outlet is wired,
and then connect the injection clamp close to the outlet to betested.
D epending on the orientation of the test voltage injection clamp,
as explained with Fig. 6-5 at the previous clause, KEW 4506
may judge as [NE Reverse] even if the outlet is correctly wired
as shown in Fig. 6-15 (outlet wired to branch circuit breaker [B]).
Connect the test voltage injection clamp to the appropriate
neutral wire (N) of the branch circuit breaker with the correctorientation and location.
Power supply

Other branch circuit
breakers [NE Reverse]

Branch circuit breaker [B][NE Reverse]

Branch circuit breaker [A][correct]					̶ 23 ̶

Fig. 6-15

Note●W
 hen the test voltage injection clamp is connected close to the
distribution board, KEW 4506 can test the outlet which is wired
to branch circuit breaker [B] shown in Fig. 6-15 and judge as“PASS” (correct); however, it is NOT recommended to connect
test voltage injection clamp to the position shown in Fig. 6-16.
” if multiple
This is because KEW 4506 may show “loads are connected to an outlet wired from any of the otherbranch circuit breakers, which is not the one to be tested, andwhere those loads are active.
Power supply

Other branch circuit
breakers [correct]

Branch circuit breaker [B][correct]Branch circuit breaker [A][correct]					̶ 24 ̶

Fig. 6-16

6-1-5 How to use KEW 4506
(1) Press

button to select “3P”.

When you test a 3P socket with earth pole (E) correctly connected,
button, KEW 4506
while “2P” has been selected withindicator
automatically switches the settings for “3P” andblinks at testing for the first time.
(2) Connection# CAUTION● Use the power cord and test leads supplied with the tester only.
K yoritsu is by no means liable for any damage resulting from theuse of commercially available power cord and test leads.
● KEW 4506 may not judge the wiring condition if test lead withIEC connector KAMP10 or MODEL 7284 is degraded and theinternal resistances are extremely changed.

						

Fig. 6-17

Firmly connect test lead with IEC connector KAMP10 or MODEL
7284 to KEW 4506 before connecting the plug of the test lead tothe outlet to be tested.

̶ 25 ̶

# DANGER● If earth wire of conversion adapter is connected to the earthterminal of the outlet, wear a pair of insulated gloves or otherprotective gears, and do not touch the earth terminal of theoutlet to avoid electrical shock accident due to wiring error.
# CAUTION● Do not apply excessive force to the tip of outlet plug.
Note● When conducting a test, stand on the floor and do not touchanything other than the tester to measure electrical potentials
precisely.

̶ 26 ̶

(3) Measurement
0.5 sec. Press the button withP
 ress the test buttonbare hand since it works as touch pad. KEW 4506 starts
measurement in 0.5 sec. with audible warning. The LCD shows” during measurement. A measurement is done in about“
1 sec. and the LCD displays the measured result.
 he LCD shows “PASS” as shown in Fig. 6-18 when the cablesTare correctly wired. In addition, green LED indicator lights up as
shown in Fig. 6-19 and beep sounds once.
N-E resistance < 2

Resistance check

N-E voltage > 8 V

Meas. OFF

Test voltage polarity check					Fig. 6-18

Green LED
lights up.

				Fig. 6-19● Measured value displayed on the bottom area of LCD
Resistance value: N -E resistance determined by measuringresistance between neutral wire (N) and earth
wire (E) is displayed.
Voltage value: N-E voltage is displayed if voltage between N-E
is 8 V or higher. When N-E voltage is higher than
8 V, KEW 4506 cannot measure resistance.
̶ 27 ̶

When KEW 4506 detects miswiring, any of the following indications
is displayed on the LCD. See Fig. 6-20. In addition, red LED
indicator lights up, as Fig. 6-21 shows, with continuous beepsounds.

Fig. 6-20
L-N Reverse

Abnormal voltage

L-E Reverse

N Non-connect

N-E Reverse

E Non-connect

N-E unjudgeable

Red LED lights up.

				Fig. 6-21
● Measured value displayed on the bottom area of LCD in case of“N-E Reverse”
Resistance value : N-E resistance determined by measuringresistance between neutral wire (N) andearth wire (E) is displayed.
Voltage value: N-E voltage is displayed if voltage between
N-E is 8 V or higher. When N-E voltage ishigher than 8 V, KEW 4506 cannot measure
resistance.
̶ 28 ̶

● Measured value displayed on the bottom area of LCD in case of
N-E unjudgeable
Resistance value : N-E resistance or “>1999 Ω” is displayedwhen N-E resistance is 2 Ω or less or
exceeds 1999 Ω and the tester cannot
detect test voltage applied via signal source.
Voltage value: N-E voltage or “>20 V” is displayed if N-E
voltage is 8 V or higher and the tester
cannot detect test voltage applied via signal
source. When N-E voltage is 8 V or higher,
KEW 4506 cannot measure resistance.

● Possible causes when test voltage from signal source cannot be
detected:C heck the signal source (KEW 8343) connected within a branch
circuit breaker is NOT in the following status.
Green Power LED is blinking.
Battey voltage is low. Please refer to the manual for signal
source and replace batteries with new ones.
Signal source is clamped in incorrect location.
Please refer to each “Note” described in 6-1-4 Connection of
KEW 8343 and make connections in correct position observing
correct orientation.
Large load current is flowing through the clamped neutral wire (N).
Signal source cannot apply test voltage correctly if large current
exceeding 100 A is flowing through a neutral wire (N). In thiscase, turn off the load of the object to be tested or disconnect
the load once and try to apply test voltage again.
Clamp jaws aren’t closed completely.
Buzzer keeps beeping if the jaws aren’t closed completely.
If buzzer keeps beeping even though signal source is clamping
a neutral wire (N) and jaws are firmly closed, load current
exceeding 30 A may be flowing on the neutral wire. In this case,test voltage is being applied correctly though buzzer keeps
beeping.
̶ 29 ̶Measured result remains displayed until test button
button is pressed.

or● Voltage warningI f voltage of 253 V or higher is applied to any of the threeterminals, KEW 4506 gives audible warning with blinking #symbol and “V[L-N]” as shown in Fig. 6-22. Even while the tester
is giving voltage warning, the tester can perform tests if voltages
are 290 V or less.
isThe tester doesn’t start a test even if the test buttonpressed when 290 V or higher voltage is applied to any of thethree terminals.

Blink

Blink

					Fig. 6-22
6-2 2P outlet(1) Test method
The tester conducts the following two measurements and judges
whether wall outlets are properly wired or not.
1) Voltage between L-N terminals
2) P otential differences between N terminal and touch pad (operator)
Judgement result
L-N voltage Potential differences
PASS
FAIL: LN Reverse
FAIL: <80V [L-N]✓✓X̶ 30 ̶

(between N terminal and touch pad)X✓(2) Press

button to select “2P”.

Note● Settings always restore to the ones for 3P socket whenever
powering on the tester.
● If the earth terminal of the outlet to be tested is earthed at 2P
test, the settings automatically change to the ones for “3P”.
(3) Connection# CAUTION● W hen earth pole (E) is connected, settings automaticallychange to the ones for “3P”.
● Kyoritsu is by no means liable for any damage or injury resulting
from the use of 3P/ 2P conversion adapter.
A 3P/ 2P conversion adapter, which is required to connect with
2P outlet, isn’t supplied with the tester. Prepare commerciallyavailable 3P/ 2P conversion adapter to connect the tester to 2P
outlet, and attach it to the plug part of test lead with IEC connector
KAMP10 or MODEL 7284 before conducting a test. Observe thecorrect orientation and connect to the outlet to be tested.
Note● When conducting a test, stand on the floor and do not touchanything other than the tester to measure electrical potentials
precisely.
● If 3P/ 2P conversion adapter you prepared has exposed metalterminals, do not touch the metal terminals during a test. KEW
4506 judges as “N-E Reverse” even if the outlet under test iscorrectly wired.

̶ 31 ̶

(4) Measurement
0.5 sec. Press the button with bare handPress the test button
since it works as touch pad. KEW 4506 starts measurement in 0.5
sec. with audible warning.
The LCD screen will be like Fig. 6-23 when the wiring is correct.
In addition, green LED indicator lights up as shown in Fig. 6-24
and beep sounds once.

Green LED lights up.

Fig. 6-23			

Fig. 6-24

When the tester detects miswiring, the LCD shows either of thefollowing indication as shown in Fig. 6-25 and red LED indicatorlights up to indicate miswiring with continuous beep sounds (Fig.
6-26).

Red LEDlights up.

L-N Reverse

Abnormal voltage

Fig. 6-25			

Fig. 6-26

Measured result remains displayed until test button
button is pressed.
̶ 32 ̶

or● Voltage warningIf voltage of 253 V or higher is applied
between two terminals, KEW 4506 gives
audible warning with blinking # symboland “V[L-N]” as shown in Fig. 6-27. Even
while the tester is giving voltage warning,
the tester can perform tests if voltages
are less than 290 V.
			Fig. 6-27

Blink

Blink

is
The tester doesn’t start a test even if the test buttonpressed when 290 V or higher voltage is applied between two
terminals.

7. Settings
7-1 Disabling resistance measurement of earth wire (E) andneutral wire (N): 3P outlet
Disabling N-E resistance measurement and using test voltage
signal only is recommended if the test site is applied to theconditions mentioned in cautions on page 11 and 12 in this manual.
Current flows by applying test voltage signal between N-E is lessthan 1 µA.
Note● Use of signal source (KEW 8343) is required to conduct a testwhen N-E resistance measurement is disabled.
● Settings won’t be cleared by powering off KEW 4506.
3 sec. switches resistanceHolding down
measurement ON/ OFF.
While resistance measurement is OFF (disabled),” symbol doesn’t appear and resistance“value isn’t displayed as shown in Fig. 7-1.
				Fig. 7-1
̶ 33 ̶

7-2 Buzzer and backlight settings
Buzzer and backlight function can be turned ON/ OFF respectively.
See Fig. 7-2.
(1) Power off KEW 4506 if it is on.
(2) Press
button 1 sec. with holding down
tester enters setting mode.

button. Now the(3) Press
button and set the displayed function either ON or
OFF, and then press
to confirm the selection and move tothe next setting item.
1) Blinking buzzer symbol “

+

”

=>
=>=>

2) Blinking backlight symbol”

”

=>=>

Fig. 7-2
1) Buzzer OFFW hen “OFF” is selected and set, “buzzer doesn’t sound.
̶ 34 ̶

Volt. Meas. screen=>=>” symbol is displayed and2) Backlight OFFW hen “OFF” is selected and set, LCD
backlight doesn’t turn on.
The number of beeps when poweringon the tester indicates the currently
selected settings.
(No beep sounds when buzzer function
is off.)

Pi…

Buzzer sounds
when powering on
the tester.

Number of beeps

Setting

Once

Automatically turns on/ off.

Twice

Backlight is disabled.
(Always off.)

Fig. 7-3

8. LCD backlightNote● Keep the surface of the illuminance sensor clean to ensure
proper detection of brightness.
● The sensitivity of the sensor is not adjustable. Cover the sensor
with your finger to turn on the light manually.
The illuminance sensor on the tester detects ambient brightness
and automatically turns on/ off the LCD backlight. Once the lightturn on, it stays on for about 15 seconds in a good light place.
The light turns off automatically after 2 minutes of no use even in adark place. A light press of power button turns on the LCD backlightagain. Ambient brightness is detected by the illuminance sensor
shown in Fig. 8-1.

					Illuminance sensor

̶ 35 ̶

Fig. 8-1

9. Battery replacement# DANGER● Do not try to open the battery compartment cover if the surfaceof the tester is wet.
● Do not replace batteries during a measurement.
● The battery compartment cover must be closed and screwed
before starting a measurement. Otherwise, electrical shock
hazard may be caused.
# WARNING● In order to avoid getting electrical shock, ensure that the tester
is powered off and is disconnected from the object to be tested
before opening the battery compartment cover for battery
replacement.
# CAUTIOIN● D o not mix new and old batteries or mix different types ofbatteries.
● Insert batteries in correct polarity as marked inside.
● Remove batteries if the tester is to be stored and will not be inuse for a long period.
(1) Power off the tester.
(2) Loosen one battery compartment cover-fixing screw and remove
the cover.
(3) Replace two batteries with new ones at the same time. Confirm
new batteries are inserted in the correct polarity.
Use of two size AA alkaline batteries (LR6) is recommended.
(4) Install the battery compartment cover, and tighten the screw andsecure the cover.
Battery compartmentcover

̶ 36 ̶

Screw

10. Specifications● Location for use: In-door use, Altitude up to 2000m
3
 P or 2P outlet with earth pole up to 253 V in Single-phase 2-Wire,
Single-phase 3-Wire, Three-phase 3-Wire 200 V (deltaconnection, L2(S) grounded), Three-phase 4-Wire commercial
power line
● Temp. & humidity range : 23ºC±5ºC, relative humidity 85% or less(accuracy guaranteed) (no condensation)● Operating Temp.& : -10ºC to 50ºC, relative humidity 85% or less
humidity range (no condensation)● Storage Temp. &: -20ºC to 60ºC, relative humidity 85% or less
humidity range
(no condensation)● Withstand voltage : 2210 V AC (50/60 Hz)/ for 5 sec.

between electrical circuit and enclosure● Insulation resistance : 50 MΩ or more / 1000 V DC
between electrical circuit and enclosure● Applicable standards : IEC 61010-1/ -2-030, CAT II 300V,

Pollution degree 2, IEC 63000 (RoHS)● Dustproof/ waterproof : IEC 60529 IP40
● LCD
: Segment display with backlight● Dimension: 212(L) × 56(W) × 39(D) mm● Weight: Approx. 250g (including batteries)● Power source: Size AA battery x 2 pcs.
(Alkaline LR6 is recommended.)● Possible number of measurementsW hen testing 3P outlet once every 30 sec. with AA alkaline batteries:
N-E resistance Possible number of measurements within
effective battery voltage range
10 Ω
Approx. 3000 times● L-N RMS voltage (in stand-by mode)
Measuring range / Display range
Accuracy
80 Vrms – 290 Vrms (50 Hz/ 60 Hz)±2%rdg±4dgt*1*1 Add ±3dgt to the specified accuracy for the sine waves other thanCF<2.5 (411Vpeak).
̶ 37 ̶

● Socket test
(1) Measurable range of power supply voltage
The tester gives voltage warning if 253 V or higher voltage is
detected but it can perform socket test.
Power supply voltage
80 Vrms – 290 Vrms (50 Hz/ 60 Hz)* 290 V or higher voltage: K EW 4506 doesn’t start test eventhough the test button is pressed.
* Voltages less than 80 V: Judged as abnormal voltage.
(2) Judgement
T he LCD shows any of the followings depending on themeasured result.
3P

2P1) PASS
2) L-N Reverse
3) L-E Reverse
4) N-E Reverse
5) E Not connected
6) N Not connected
7)8) Abnormal voltage

1) PASS
2) L-N Reverse
3) Abnormal voltage(3) Resistance measurement between N-E(only when N-E voltage is less than 8 V)
Resistance between N-E is displayed with the judgement result.
Range
Measuring(Auto-ranging) range

Test current

200Ω range

0.0-199.9 Ω

5 mA(5.3 Hz)

2000Ω range

200-1999 Ω

1 mA(5.3 Hz)

Accuracy±3%rdg±5dgt(4) N-E RMS voltage(displayed only when N-E voltage is 8 V or higher.)
Measuring range
8.0 Vrms – 20.0 Vrms (50 Hz/ 60 Hz)
̶ 38 ̶

Memo̶ 39 ̶

Memo̶ 40 ̶DISTRIBUTOR

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

09-22

92-2376