KYORITSU KEW6201A User manual

PORTABLE APPLIANCE TESTER
KEW6201A
INSTRUCTION MANUAL

CONTENTS
1. Safe testing ………………………………………………………………………………………1
2. Procedure of removing cover ……………………………………………………………. 3
2.1 Method of removing the cover ……………………………………………………. 3
2.2 Method of storing the cover ………………………………………………………. 3
3. Product summary and explanation ……………………………………………………. 4
3.1 Product summary …………………………………………………………………….. 4
3.2 Test range ………………………………………………………………………………… 4
3.3 Features …………………………………………………………………………………... 5
3.4 Instrument layout …………………………………………………………………….. 5
3.5 Explanation for indications …………………………………………………………. 8
3.6 Applicable standards …………………………………………………………..…….. 8
4. Specification ………………………………………………………………………………….. 9
4.1 General specification, measuring range and accuracy ……………………. 9
4.2 Threshold and display ……………………………………………………………….. 9
4.3 Reference test condition ………………………………………………………….. 10
5. Preparation before a measurement …………………………………………………. 11
5.1 Visual inspection ……………………………………………………………………… 11
5.2 Connection to main power supply ……………………………………………. 11
5.2.1 Connection of mains cord ……………………………………………… 11
5.2.2 Check the power supply voltage ……………………………………… 11
5.2.3 Null setting (Protective conductor resistance function) ……… 12
5.2.4 Voltage setting for insulation resistance measurement ……… 13
6. Measuring method ………………………………………………………………………… 14
6.1 Class I Test ………………………………………………………………………….. 14
6.2 Class I Test (Select the Leakage current test) ……………………………. 16
6.3 Class II Test ………………………………………………………………………….. 17
6.4 Class II Test (Select the Leakage current test) …………………………… 18
6.5 Extension Leads Test ……………………………………………………………… 20
6.6 Leakage Current Test ……………………………………………………………… 23
7. Fuse replacement ………………………………………………………………………… 24
8. Services ………………………………………………………………………………………. 25
9. Case and strap assembly ………………………………………………………………… 25

— 1 —
1. Safe testing
Electricity is dangerous and can cause injury and death. Always treat it with
the greatest of respect and care. If you are not quite sure how to proceed,
stop a measurement and take advice from a qualified person.
This instruction manual contains warning 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.
IMPORTANT:
This instrument must only be used by a competent and trained person and
operated in strict accordance with the instructions.
KYORITSU will not accept liability for any damage or injury caused by misuse
or non-compliance with the instructions or with the safety procedures.
It is essential to read and to understand the safety rules contained in the
instructions or with the safety procedures.
The symbol #indicated on the instrument means that the user must refer to
the related sections in the manual for safe operation of the instrument.
Be sure to carefully read 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 cancause minor
injury or instrument damage.

— 2 —
#DANGER
•This instrument can be connected only to the commercial power of
240V+10%-10%, 50Hz.
•For safety reasons, only use the Test Leads designed to be used with
this instrument and recommended by KYORITSU.
•Use only grounded mains outlets to supply the instrument.
Do not touch the device under test while testing is in progress.
•
Since a high voltage of 500V is outputting continuously, especially while
measuring insulation resistance, user may get electrical shock. Also not to
touch the capacitor of the device under test as hazardous voltage may exist.
•When testing, always be sure to keep your fingers behind the safety
barriers on the test leads.
•Disconnect the instrument from the power supply when measurement
is finished.
•Do not leave the instrument with connected to the power supply.
•Be sure to use the instrument only in its intended applications and to
follow measurement procedures described in the manual.
•The instrument should be used only in its intended applications or
conditions. Otherwise, safety functions equipped with the instrument
do not work, and instrument damage or serious personal injury may
be caused.
•Verify proper operation on a known source before use or taking action
as a result indication of the instrument.
•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. Kyoritsu is by no means
liable for any damage resulting from the instrument in contradiction
to these cautionary notes.
#WARNING
•Never open the instrument case – because dangerous voltages are
present. Only fully trained and competent electrical engineers should
open the case.
•
If abnormal conditions of any sort are noted (such as a faulty display,
unexpected readings, broken case, cracked test leads, etc) do not use
the instrument and return it to your distributor for inspection and repair.
• Never attempt to use the instrument if the instrument or your hand is wet.
•This instrument isn't dust & water proofed. Keep away from dust and
water.
•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.
•Never attempt to make any measurements if the test lead or the
instrument has any structural abnormality, such as a crack, or if the
cover is not securely attached.

— 3 —
#CAUTION
•
When using Test Leads with alligator clip, be sure to check the alligator
clip is firmly connected to the metal part of the device under test.
Otherwise, inaccurate measurement or arc at the contacts may occurs.
•The rated measuring voltage for insulation test is 500V.DC.
For electrical devices to be tested, if this test voltage seems not
proper to apply, contact your distributor and ask for advices.
•When testing faulty device, it may trip the circuit breaker of main
power supply during test and may cause interruption of service. Be
careful when the same main power supply is used for PCs.
•We are not liable for loss of data on PC during testing with this
instrument. The device under test (DUT) is powered on during most
tests, but please turn it to OFF position after use.
•Use a cloth dipped in water or neutral detergent for cleaning the
instrument. Do not use abrasives or solvents.
2. Procedure of removing cover
KEW 6201A have a dedicated cover to protect against an impact from the
outside and prevent the operation part, the LCD, and the connector socket
from becoming dirty. The cover can be detached and put on the back side of
the main body during measurement.
2.1 Method of removing the cover
2.2 Method of storing the cover
Fig. 1
Fig. 2

— 4 —
3. Product summary and explanation
3.1 Product summary
The KEW 6201A is a hand-held portable appliance tester, performing four
functions to ensure the Safety of Class I and Class II appliances. And also can
measure the mains voltage. Readings are displayed on a large liquid crystal
display (LCD) below which are three LEDs, light up in 2 color, 2 color LEDs
which unambiguously display a pass or fail indication for results dictated by
international standards.
This instrument is suitable for performing tests as required by the following
standards.
AS/NZS 3760 In-service safety inspection and testing of electrical equipment.
This instrument is designed to check the electrical safety of appliances of
Class I and Class II categories.
As a guide IEC standard define these two categories as follows:
Class I : Appliances which have a functional insulation throughout and
an earth connected case. These are often described as earthed
appliances.
Class II: Appliances which have both functional and additional insulation
where any metal parts cannot becomeLiveunder fault conditions.
3.2 Test Function
KEW6201A have following features.
Function Tests of contents
Class I Test •Protective conductor resistance
•Insulation (250V or 500V)
SELECT Switch + Class I Test •Protective conductor resistance
•Leakage Current test
Class
II Test •Insulation (250V or 500V)
SELECT Switch + Class II Test •Leakage Current test
Extension Leads test •Protective conductor resistance
•Insulation P/N-PE
•Polarity
SELECT Switch +
Extension Leads test
•Protective conductor resistance
•Leakage Current test
Leakage Current Test •Leakage current measurement

— 5 —
Fig. 3
⑴Test socket ⑵ Terminal block ⑹ LCD
⑺LED for test result
⑻Start/Stop switch
⑼Null/250V-500V
switch
⑽Function switch
⑾SELECT switch
3.3 Features
•Warning for the appliance to be ON.
•Selection for 250V or 500V on the insulation resistance test.
•Null function for the protective conductor resistance test.
•Warning for the over range value in the LCD.
•Capable of judging pass/fail of tests by LED on the panel and by buzzer.
3.4 INSTRUMENTS LAYOUT
Terminal Block
⑿ ⑶ ⑷ ⑸
⑴Test socket
Insert the mains plug of DUT to this socket for the polarity test of protective
conductor resistance, insulation resistance and Leakage current test.

— 6 —
⑵Terminal block
Connect the attached mains cord and Test Leads to this terminal block.
⑶Terminal for mains cord
This terminal is connected to a mains supply via M7123.
⑷Terminal for Extension leads adaptor
It corresponds to L, N, E of test socket, and the extension leads adaptor
(M-7140) connected with the cord reel to be plugged to it.
⑸PE-probe terminal
Connect the Test Lead with alligator clip (M-7129A)(13) to this terminal for
the measurement of protective conductor resistance, and clip the metal
parts of DUT with the alligator clip.
⑹LCD
Measured value is displayed
⑺LED for test result
When the value of protective conductor resistance and insulation
resistance exceeds the limit dictated by applicable standards, LED lights up
in red. When it is within the limit, LED lights up in green.
⑻Start/Stop switch
A measurement starts by pressing this switch.
Pressing the Start/Stop Switch again during Leakage Current Test stops
measurements.
⑼Null/250V-500V switch
•Class I test measurement
It is used in order to push the Null button before protection earth
resistance measurement and to cancel the resistance of a test leads.
•Class II test measurement
The test voltage of insulation resistance is changed to 500V and 250V.
⑽Function switch
Select a function with this switch.
⑾SELECT switch
When the function is set under SELECT switch is pressed, the appliance
will be actually operated to measure a leakage current instead of
measuring insulation.

— 7 —
⑿Fuse
Protected by a fuse of 600V/10A ceramic fuse (F type Φ6.3x32mm).
User can replace this fuse.
Please refer to Section 7 for information on replacement fuse.
⒀Mains cord (AU) M-7123
This mains cord can be connected to the mains supply so that the
instrument can derive power from it. To measure contact current, the
socket of the main power supply is to be equipped with an earth terminal.
⒁Test Lead with safety alligator clip(M-7129A) and Probe with Blade type
Prod(M-7161A).The adapter of a tip part is exchangeable for an alligator
clip and a test stick type.
Please use it according to a measurement use.
⒂Extension leads adaptor(M-7140)
This is for connecting the instrument and a cord reel.
Fig. 4
Fig. 5
Fig. 6
Safety Alligator Clip
Probe with Blade Type Prod

— 8 —
3.5 Explanation for indications
LCD Display
Note) Over range display:OLis displayed on the LCD.
Display symbols
DUT is OFF. Represents LN-E.
When leakage current
test is interrupted.
R e p r e s e n t s l e a k a g e
current.
Represents Protective
conductor resistance
D u r i n g t h e D U T i s
operated at the leakage
current test.
Represents the test is
fail.
Display prompt the user
to set the DUT switch
on.
The temperature sensor monitors overheating of the transformer.
When the overheat symbol appears on the LCD screen the unit
will cease to operate until it cools down to normal operating
temperature and the overheat symbol disappears from the screen.
Normal operation then resumes.
3.6 Applicable standards
Instrument operation
AS/NZS 3760 In-service safety inspection and testing of electrical
equipment.
Safety: IEC/EN61010-1 CAT.III 300V-instrument
IEC/EN61010-2-030 CAT.III 300V
IEC/EN61010-031 CAT.III 300V(600V)-test lead
Insulation measurement voltage
Over temperature warning Unit indication
Null indication
Power supply voltage
(Line-Neutral) indication
Fig. 7

— 9 —
4. Specification
4.1 General specification, measuring range and accuracy
Voltage(VOLT) measurement of main power supply
Measuring range 207 ~ 264V AC
Resolution 1V
Accuracy ± (2%rdg+3dgt)
Measurement of Protective conductor resistance(RPE)
Measuring range 0 ~ 15.00Ω
Resolution 10mΩ
Open-circuit voltage <AC12V
Measuring current 10A AC nominal value
Accuracy ± (3%rdg+5dgt)
Measurement of Insulation resistance (RINS)
Rating 250V/20MΩand 500V / 20MΩ
Measuring range 0.1~19.99MΩ
Resolution 10kΩ
Rated voltage 250V/500V DC(+20%/-10%) @1MΩ
Short-circuit current 2.5mA DC or less
Accuracy ± (2% rdg+3dgt)
Leakage current test
Measuring range AC0.1~ 19.99mArms
Resolution 0.01mA
Accuracy ±(3%rdg ± 5dgt)
Examination time Max 15 seconds
Note: For MOV appliances use Leakage Current test.
4.2 Threshold and display
Equipment
Protective conductor
resistance
Insulation
resistance
Leakage
current
Class I RPE
=
<
1ΩRINS
>
=
1MΩIEL
=
<
5mA
Class II RINS
>
=
1MΩIEL
=
<
1mA
Extension Leads RPE
=
<
1ΩRINS
>
=
1MΩIEL
=
<
1mA

— 10 —
4.3 Reference test condition
Unless otherwise specified, this specification is dependent on following
condition.
⑴ Ambient temperature: 23±5˚C
⑵ Relative humidity: 45 ~ 75%
⑶ Attitude: Horizontal
⑷ AC power supply: 240V, 50Hz
⑸ Altitude: 2000m or less
Operating temperature and humidity range
0℃~ +40℃ Relative humidity: 85% or less (no condensation)
Storage temperature and humidity range
-20℃~ +60℃ Relative humidity: 85% or less (no condensation)
Rate voltage and frequency
Rated voltage: 240V ±10%
Rated frequency: 50 Hz ±1%
Maximum rated power
Approx. 9VA
Outer dimension and weight
Outer dimension: 185(L) × 167(W) × 89(D)mm
Weight: Approx. 1.2kg (only the instrument body)
Symbols used on the instrument:
Equipment protected throughout by DOUBLE INSULATION or
REINFORCED INSULATION
 #
Caution (Refer to the accompanying instruction manual)
This instrument satisfies the marking requirement defined in the
WEEE Directive (2002/96/EC). This symbol indicates separate
collection for electrical and electronic equipment.
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010 establishes
safety standards for various electrical environments, categorized as CAT II to
CAT IV, and called measurement categories.
O : Circuits which are not directly connected to the mains power
supply.
CAT II : 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 overcurrent protection device
(distribution panel).

— 11 —
5. Preparation before a measurement
5.1 Visual inspection
Before starting a measurement, user should undertake visual checks on
the mains cord, case and that the correct type and rated fuse is fitted to
the DUT. And also there should be no evidence of damage of a nature
that may impair the electrical safety of the item.
5.2 Connection to main power supply
5.2.1 Connection of mains cord
Set the Function switch to VOLT Function, and connect the mains supply
and the instrument with M7123 mains cord.
#CAUTION
•Always be sure to check there is no abnormal conditions or damages
on the instrument and cords. If any evidence of abnormality found,
measurement shall be stopped immediately.
•The outlet of main power supply must have earth terminal.
•This instrument can be only connected to the commercial power of
240V+10%-10%, 50Hz.
5.2.2 Check the power supply voltage
There is no power switch and the instrument is immediately ready for
use. Power supply voltage is displayed on the LCD. Please check the
value, and when it is from 216V to 264V, the instrument can perform
correct measurements. If the displayed value is out of above range, do
not make a measurement.
Fig. 8
M7123

— 12 —
#WARNING
•When the voltage of main power supply is 265V or more,HI-Vis
displayed on the LCD.
•In that case, disconnect the mains cord of the instrument from main
power supply.
5.2.3 Null setting
A criteria of judgment for Earth Continuity is 1Ω, and it is low value.
So even the resistance of Test Leads will affect the measurement result.
This instrument, M-6201A, can cancel the resistance of Test lead by
pressing Null|250V/500V switch. The procedure of Null setting is
shown below.
The Null function is not released even if power off the instrument,
therefore, there's no need to do Null setting at every measurement.
However, when replacing fuses or test leads, it is recommended to do
Null setting again.
Procedure:
⑴ Set the function switch to Class I Test function.
⑵
Connect the mains supply and the instrument with M7123 mains cord.
⑶ Insert Test Lead with safety alligator clip (M-7129A) in to the E terminal
of the instrument, and contact the tip of the Test Lead with the metal
parts of the socket on the instrument.
M-7129A
Fig. 9

— 13 —
Press Null|250V/500V switch with contacting the Test Lead and the
metal parts, the resistance of Test Lead will be displayed on the LCD as
shown above fig.10 for 2sec.
Then, the instrument cancels the resistance value of Test Lead and
adjust the displayed value to0.00as shown below fig.10.
At this bout, NULL mark is displayed in the LCD.
Null setting cannot be done when a resistance is 3Ωor more.
A messagenoappears to indicate a resistance is exceeding the Null
setting range.
Display at Null setting
⑷ Null setting can be released by pressing Null|250V/500V switch for
2sec. The NULL mark on the LCD will disappear when Null setting is
released.
Null setting and release can be done on Class I Test function only.
5.2.4 Voltage setting for insulation resistance measurement
(How to change 250V and 500V)
⑴ Set the function switch to Class II Test function, and press the
Null|250V/500V switch. Then the mark to indicate the selected
voltage is shown on the LCD. By pressing Null|250V/500V switch,
250V and 500V can be changed over.
Fig. 10
Fig. 11

— 14 —
6. Measuring method
6.1 Class I Test
The purpose of the test carried out for Class I appliances is to check the
insulation resistance between accessible conductive parts and connection
of protective earth and between live wire parts and accessible conductive
parts is within the range defined in the standards. To conduct the tests of
protective conductor resistance and insulation resistance for DUT, connect
the mains plug of DUT to the test socket (1) described in clause 3.4.
INSTRUMENTS LAYOUT and PE probe terminal (5).
Use the following setups, depending upon the type of DUT.
Fig. 12
Clip except for the part which
rotates or be heated.
Switch ON the power.



— 15 —
Class I Test Flowchart
Start
#CAUTION
•Short-circuit between L/N and PE is doubt when "no" and "OFF"
appears on the LCD in turns at the insulation resistance measurement
of the Extension leads test for Class I & II while DUT is on. Testing
should be immediately suspended.
•Follow the procedure described in 5.2-3 and do NULL setting before a
measurement.
•Alligator clip must make good contact with the enclosure of the DUT.
•When the terminal is open or the resistance value exceeds measuring
range,OLmark (over range display) appears on the LCD.
•Do not touch the device under test while testing is in progress. Since
a high voltage of 500V, user may get electrical shock.
⑴. Protective conductor resistance.
RPE <
=1Ω?
⑵.Appliance switch test
(3). Insulation resistance between L/N and PE.
LnE >
=1MΩ?
Light up in red
no→Con→valuewill
be repeated on the LCD.
Light up in red
no→LnE→valuewill
be repeated on the LCD.
Value (1). and (3). will be
alternately displayed on LCD
When the resistance between
LN is about 100kΩor more
no→OFFis displayed
alternately on the LCD.
No
No
No
Yes
Yes
Yes
PASS
Light up in green
Light up in green
Is the Switch
turning on?

— 16 —
6.2 Class I Test (Select the Leakage current test)
SelectingClass I testwhile Select Switch is being pressed down initiates
Leakage current test instead of Insulation resistance test.
In case of selecting Leakage current test, metal parts other than the heating
or movable parts must be clipped with Test Lead M-7129A since the DUT
activates. Pressing the START/STOP switch during Leakage current test
stops the test immediately. To restart the test, press the START/STOP
switch again 2 sec or later than the stop of the test. Then (1) Protective
conductor resistance will be restarted.
Fig 12 indicates how to connect the devices.
Class I Test (Select the Leakage current test) Flowchart
Start
(1). Protective conductor resistance.
RPE <
=1Ω?
(2). Power on Leakage current test.
LEA <
=5mA?
Light up in red
no→Con→valuewill
be repeated on the LCD.
Light up in red
Stop the test and
no→LEA→valuewill
be repeated on the LCD.
Value of (1). and (2). will be
alternately displayed on the LCD.
No
No
Yes
Yes
PASS
Light up in green
Light up in green
Brief indicationsS-andonwill be displayed
in turns on the LCD for 5sec and prompt the
user to set the DUT switch on.
Then a mark indicating working DUT function
will be displayed for 10 sec.
5sec
10sec

— 17 —
#CAUTION
•When the terminal is open or the resistance value exceeds measuring
range,OLmark (over range display) appears on the LCD.
•The test will stop. A messageStpappears on the LCD but values of
Leakage current aren't displayed.
#WARNING
•Operate a device and measure the leakage current flowing on it at
Leakage current test function. Care should be taken not to touch with
the heating or movable parts during tests. Extra care should also be
taken to light and heat generated by the device.
•Firmly insert the plugs of DUT to the AU socket of this instrument.
Plugs may be heated if Leakage current test is performed with
improper connection.
•Do not connect/remove the plugs during Leakage current test. It may
cause reading error. Do not use the instrument on the device which
has a power of 2kVA or more.
6.3 Class ⅡTest
The Class Ⅱappliances have the indication ofDOUBLE INSULATION
or the symbol of . Double insulation test is to check the insulation
resistance of the appliances is within the range defined in the standards.
Fig. 13
Switch ON the power.

— 18 —
Class II Test Flowchart
Start
#CAUTION
•Short-circuit between L/N and PE is doubt when "no" and "OFF"
appears on the LCD in turns at the insulation resistance measurement
of the Extension leads test for Class I & II while DUT is on. Testing
should be immediately suspended.
•When the terminal is open or the resistance value exceeds measuring
range,OLmark (over range display) appears on the LCD.
•Do not touch the device under test while testing is in progress. Since
a high voltage of 500V, user may get electrical shock.
6.4 ClassⅡTest (Select the Leakage current test)
When the function is set to Class II test while pressing Select switch, Power
on leakage current test will be carried out instead of Insulation resistance
test. When Leakage current test is chosen, DUT will operate actually. Clip a
metal part of the machine tool except for the rotating part with Test Lead
M-7129A. In order to stop testing the leakage current while measuring, press
START/STOP
. To start a test again, press
START/STOP
again after about
2 seconds or more from the stop. The test will be restart.
(1). Appliance switch test
Is the Switch
turning on?
(2). Insulation resistance between L/N and PE.
LnE >
=1MΩ?
When the resistance between
LN is about 100kΩor more
no→OFFis displayed
alternately on the LCD.
Light up in red
no→LnE→valuewill
be repeated on the LCD.
Value of (2). will be
displayed on the LCD.
No
No
Yes
Yes
PASS
Light up in green
Light up in green