Kewtech EZYPAT User manual

EZYPAT / EZYPAT+ / SMARTPAT
PORTABLE APPLIANCE TESTER
INSTRUCTION MANUAL

1
CONTENTS
1. Safe testing.........................................................................................................2
2. Product summary and explanation.....................................................................5
2.1 Product summary..........................................................................................5
2.2 Test Function.................................................................................................5
2.3 Features........................................................................................................5
2.4 Testers layout................................................................................................6
2.4.1 Function Switches......................................................................................6
2.4.2 LCD indications..........................................................................................8
2.4.3 Connector.................................................................................................10
2.5 Accessories.................................................................................................11
3. Specification......................................................................................................12
3.1 General specification, measuring range and accuracy...............................12
3.3 Threshold and display.................................................................................15
4. Preparation before a measurement..................................................................17
4.1 Visual inspection .........................................................................................17
4.2 Battery Voltage Check.................................................................................17
4.3 Setting.........................................................................................................17
4.3.1 Null setting ...............................................................................................17
4.3.2 Voltage setting for insulation resistance measurement............................18
(How to change between 250V and 500V) .......................................................18
4.3.3 Criteria setting for CL I leakage current test ............................................18
5. Measuring method............................................................................................20
5.1 Class I Test..................................................................................................20
5.3 Class ll Test.................................................................................................25
5.3 Extension Leads Test..................................................................................30
5.4 RCD TEST ..................................................................................................33
6. Remote testing (SMART PAT)..........................................................................37
7. Backlight ...........................................................................................................38
8. Battery / Fuse replacement...............................................................................38
8.1 Battery Replacement...................................................................................38
8.2 Fuse Replacement......................................................................................39
9. Maintenance .....................................................................................................39

2
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, then stop,
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 Tester and retain it in safe
condition. Therefore, read through these operating instructions before using the
Tester.
IMPORTANT:
The Tester must only be used by a competent and trained person and operated in
strict accordance with these instructions.
KEWTECH 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 these
instructions and with the safety procedures.
The symbol indicated on the Tester means that the user must refer to the
related sections in the manual for safe operation of the Tester.
Be sure to carefully read instructions following each symbol in this manual.
DANGER
●The Tester can be connected only to the commercial power of 100V –
253V, 50Hz.
●For safety reasons, only use the Test Leads designed to be used with this
Tester and recommended by KEWTECH.
●Use only grounded mains outlets to supply the Tester.
●Do not touch the device under test whilst testing is in progress.
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.

3
DANGER
●Since a high voltage of 500V is being output continuously, when measuring
insulation resistance, the user may get an electrical shock. Any capacitors in
the appliance under test may become charged during testing and may contain
hazardous voltages do not touch them.
●When testing, always be sure to keep your fingers behind the safety protective
finger guard on the test leads.
●Disconnect the Tester from the power supply when measurement is
finished.
●Do not leave the Tester with connected to the power supply.
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, un-
expected readings, broken case, cracked test leads, etc.) do not use the
Tester and return it to your distributor for inspection and repair.
●Never attempt to use the Tester if the Tester or your hands are wet.
CAUTION
●When using Test Leads with the crocodile clip, be sure to check the crocodile
clip is firmly connected to the metal part of the device under test. Otherwise,
inaccurate measurements or arcing at the contacts may occur.
●The rated measuring voltage for the insulation test is 500V. DC.
If this voltage seems too high for the appliance under test contact the
appliance manufacturer for advice. The IEE Code of Practice allows for a
touch current test where an insulation test cannot be carried out.
●When testing a faulty appliance, 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 The Tester.
The appliance under test is powered on during most tests, but please turn it
to the OFF position after testing.
●Use a very slightly damp cloth for cleaning the Tester. Do not use
abrasives or solvents.

4
Measurement Category
To ensure safe operation of measuring instruments, IEC 61010 establishes safety
standards for various electrical environments, categorized as O to CAT IV, and
called measurement categories. Higher-numbered categories correspond to
electrical environments with greater momentary energy, so a measuring
instrument designed for CAT III environments can endure greater momentary
energy than one designed for CAT II.
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 over-current protection device (distribution
panel).

5
2. Product summary and explanation
2.1 Product summary
EZYPAT / EZYPAT+ / SMARTPAT (Tester) is a hand-held portable appliance
tester and can test electrical safety of Class I and Class II appliances. The
Tester performs test and indicates PASS/ FAIL result complying with the
criteria of judgement defined in The IEE Code of Practice for In-service
Inspection and Testing of Electrical Equipment: 2003.
As a guide, the IEC standard defines 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.
2.2 Test Function
Available functions vary depending on models.
Function
EZYPAT
EZYPAT+
SMARTPAT
C
L
1
Protective conductor
resistance test (Test
current 200mA DC
nominal)
レ
レ
レ
C
L
2
Insulation test (250V or
500V)
レ
レ
レ
Substitute leakage
current test
レ
レ
レ
Run leakage current test
レ
レ
Load current
レ
レ
Extension Lead test
レ
レ
レ
RCD Test
レ
Remote function
レ
2.3 Features
Check for whether the appliance is switched ON.
Selection for 250V or 500V on the insulation resistance test.
Null function for the protective conductor resistance test.
Auto-testing & PASS/ FAIL indication with backlight
Auto-power-off
Remote testing (SMARTPAT only)

6
2.4 Tester layout
2.4.1 Function Switches
Switch
Details
CLI
switch
Short press: Starts CLI test.
(Continuity test: 1 sec.)
Long press: Starts CLI test.
(Continuity test: 5 sec.)
CLII
switch
Starts CLII test.
Extension
switch
Short press: Starts Extension lead test.
(Cont. test: 1 sec.)
Long press: Starts Extension lead test.
(Cont. test: 5 sec.)
NULL
switch
Long press (at least 2 sec.): Performs NULL.
Connector
Display(LCD)
Keys
Connector

7
Switch
Details
Power
switch
Short press: Works as ESC switch. Returns to the
stand-by screen when a test is halted
by “FAIL” result.
Long press: Turns on/ off the Tester.
250V
/500V
Short press: Switches output voltage for insulation
resistance test between 250 V and
500 V. (Default setting: 250 V)
Long press: Switches threshold current for CL I
leakage current test between 0.75 mA
and 3.5 mA. (Default setting: 0.75 mA)
Light
switch
Short press: Turns on/ off LCD backlight.
Long press: Enters into remote mode.
SMART PAT only
RCD
switch
Switches to RCD stand-by screen. Another press
on the stand-by screen starts RCD test. Long
press on the screen switches test current between
10 mA and 30 mA. (Default setting: 30 mA)

8
2.4.2 LCD indications
<All symbols to be displayed on the LCD>
Display symbols
NULL value has been set.
Rated voltage for insulation resistance test
SUB: Substitute leakage current
RUN: Leakage current test under actual working
condition
Rated current for RCD test
Measurement in process
Switches are locked and Tester is in remote test mode.
(The Tester is being controlled via a tablet device.)
Protective conductor resistance
Insulation resistance
Insulation resistance between L-N
(Extension Lead Test)
Leakage current
Load current
Mains voltage
Polarity test result
Indicates items failed the test.

9
RCD test range
Prompts to check and turn on a DUT.
Incorrect connection
Indicates the resistance between L-L (N-N) is less than
10 Ω and polarity is correct.
Open circuit warning –resistance between L-L (N-N) is
10 Ωor higher at polarity test.
Crossed L-N polarity warning - resistance between
L-N (N-L) is 10 Ωor lower at polarity test.
Short-circuited L-N warning –resistance between L-N
is 100 kΩ or lower at insulation test. (Extension Lead
Test)
Fault voltage of 50 V or higher is detected at RCD test.
Test result is “PASS”.
Test result is “FAIL”.
RCD tripped at fault current detection.
Indicates the measured protective conductor
resistance is between 0.11 and 0.88 Ω.

10
2.4.3 Connector
(1)
Test socket
Insert the mains plug of DUT to this socket for the
polarity test of protective conductor resistance,
insulation resistance and leakage current test.
(2)
Terminal for
mains lead
This terminal is connected to a mains supply via
EZYMAIN.
(3)
PE-probe
terminal
Connect the Test Lead with alligator clip to this
terminal for the measurement of protective
conductor resistance, and clip the metal parts of
DUT with the alligator clip.
(4)
Terminal for
Extension
leads adaptor
It corresponds to L, N, E of test socket, and the
extension leads adaptor connected with the cord
reel to be plugged to it.
(1)
(3)
(4)
(2)
(3)
(4)
EZYPAT
EZYPAT+/SMARTPAT

11
2.5 Accessories
(1) Mains lead EZYMAIN (EZYPAT+/SMARTPAT)
This mains lead can be connected to the mains supply so that the Tester supply
power to the DUT.
(2) Test Lead with safety crocodile clip (MODEL7208) and Probe with Blade type
Prod(MODEL7168). The probe and crocodile clip are interchangeable.
Please use it according to a measurement use.
*1 Protective finger guard is a part providing protection against electrical shock and
ensuring the minimum required air and creepage distances.
(3) Extension leads adaptor EZYEXT
This is for connecting the Tester and an extension lead (cord reel).
(4) Soft case EZYBAG
(5) Six AA alkaline batteries (LR6)
(6) Instruction manual
Crocodile Clip
Probe with Blade Type Prod
IEC Connector
Protective
finger guard*1
Protective
finger guard*1

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3. Specification
3.1 General specification, measuring range and accuracy
Mains voltage indication: available on EZYPAT+ and SMARTPAT only
Display range
30 - 270 V
Hi/ Lo indication
< 30 V: No voltage indication
> 270 V: 270 V
Resolution
1 V
Accuracy
±5 V
* Voltage between L-N of mains lead terminal is measured and displayed at voltage test.
Protective conductor resistance test
Measuring range
0.00 - 20.00 Ω (NULL value included.)*
Over-range indication
> 20.00 Ω
Resolution
0.01Ω
Open-circuit voltage
5 V ±0.4 V DC
Measuring current
200 mA DC (nominal value)
Accuracy
±3%rdg ±5dgt
* Resistances exceeding 3 Ω cannot be canceled by NULL function.
Insulation resistance test
Rated voltage
250V
500V
Measuring range
0.00 - 20.00 MΩ
Over-range
indication
> 20.00 MΩ
Resolution
0.01 MΩ
No-load voltage
250 V DC +20%, -0%
500 V DC +20％,-0％
Short-circuit
current
1.5 mA DC or less
Rated current
1 -1.2 mA with a load of
0.25 MΩ
1 to 1.2 mA with a load
of 0.5 MΩ
Accuracy
±2%rdg±3dgt

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Leakage current test under actual working condition: EZYPAT+ and SMARTPAT
(Load current is also measured.)
Item
Load current
Leakage current
Mains voltage range
100 - 253 V/ 50 Hz
Measuring range
0.10 - 13.00 A rms
0.10 - 20.00 mA rms
Display range
0.00 - 13.00 A
0.00 - 20.00 mA
Over-range indication
> 13.00 A
> 20.00 mA
Resolution
0.01A
0.01mA
Accuracy
±10%rdg ±5dgt
±3%rdg ±5dgt
Max. rating
3 kVA max./
15 sec. continuous
---
*If 100 V or higher voltage is being applied to, the Tester automatically performs leakage
current test under actual working condition.
Substitute leakage current test
Measuring range
0.10 - 12.00 mA rms
Over-range indication
> 12.00 mA
Resolution
0.01mA
Open-circuit voltage/
Freq.
30 V ±5 V rms / 50 Hz ±5%
Measuring current
1.2 mAAC ±0.5 mA(when measuring 12.00 mA)
Accuracy
±3%rdg±5dgt
Insulation test between L-N at Extension Lead Test
Open-circuit voltage
4.5 V ±0.5 V DC
Criteria of judgement
100 kΩ ±20 kΩ or less: LCD shows “<0.10 MΩ”
and the measurement is halted.
RCD test: available with SMARTPAT only
Four tests with the pre-set rated current are performed in the following sequence:
×1(0°)→×1(180°)→×5(0°)→×5(180°).
Rated voltage
230 V - 15% to +10%/ 50Hz
Rated current
10 mA/ 30 mA
Function
×1
×5
Test duration
0.0 ms - 500.0 ms
0.0 ms - 40.0 ms
Energization
FS ±3%
Test current accuracy
2% - 8%
Operating time
accuracy
±2 ms (≦40 ms)
±8 ms (>40 ms)

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3.2 General specification
Reference conditions
Specifications are based on the
following conditions, except where
otherwise stated:-
(1) Ambient temperature: 23±5˚C
(2) Relative humidity: 45 - 75%
(3) Attitude: Horizontal
(4) AC power supply: 230 V, 50Hz
(EZYPAT+,SMARTPAT)
(5) Altitude: 2000m or less
Battery type
Six size AA alkaline batteries (LR6)
Operating temperature and
humidity range
0ºC to +40ºC, relative humidity: 85% or
less (no condensation)
Storage temperature and
humidity range
-20ºC to +60ºC, relative humidity: 85%
or less (no condensation)
Rate voltage and frequency
(EZYPAT+, SMARTPAT)
Rated voltage: 230 V +10%, -15%
Rated frequency: 50 Hz
Maximum load current at test
socket (EZYPAT+, SMARTPAT)
3 kVA (15sec.)
Outer dimension and weight
Outer dimension:
261(L) × 104 (W) × 57(D)mm
Weight (Tester body only):
EZYPAT: Approx. 860g
EZYPAT+: Approx. 950g
SMARTPAT:Approx. 970g
Auto power off
The Tester turns off automatically after 5
minutes.
Applicable standards:
Instrument operation
The IEE Code of Practice for In-service
Inspection and Testing of Electrical
Equipment
Safety
IEC/EN61010-1 CAT II 300V-instrument
IEC/EN61010-2-030
IEC/EN61010-031 CAT III 600V
(MODEL7208 / MODEL7168 )
EMC
EN61326-1, 2-2
Possible number of measure-
ments where battery voltage is
Approx. 1400 times
(CLI Rpe: 0 Ω, Rins: 1.1 MΩ)

15
within the effective range
(measuring every 30 sec.)
Symbols used on the Tester:
CAT II
Electrical circuits of equipment connected to an AC electrical
outlet by a power cord.
Double or reinforced insulation
User must refer to the explanations in the instruction manual.
Earth
Crossed-out wheel bin symbol (according to WEEE Directive:
2002/96/EC) indicating that this electrical product may not be
treated as household waste, but that it must be collected and
treated separately.
3.3 Threshold and display
Function
Protective
conductor
resistance
Insulation
resistance
Leakage current
Class l
RPE <
0.1Ω(*1)
RINS > 1MΩ
ILEAK < 0.75mA
or
ILEAK < 3.75mA
Class ll
RINS > 2MΩ
ILEAK < 0.25mA
Extension Lead
RPE <
0.1Ω(*1)
RINS > 1MΩ
RCD(*2)
RCD Type
×1
×5
Plug Top
200 ms or less
40 ms or less
Installation
300 ms or less
40 ms or less
(*1): Extension leads and appliances with long mains leads have a greater
resistance allowance for earth continuity. Please refer to the Table 1 on next page.
(*2): Plug Top type RCD-based judgement.

16
Table 1:
Summary of flexible table resistance rounded to two decimal places*
*For flexible cables to BS 6500 or BS 6360
Nominal Conductor csa –
should be marked on
flexible cable (mm2)
Length
(m)
Resistance
(at 20°) (Ω)
Max. carrying
current (A)
0.5
1
0.04
3
2
0.08
3
0.12
4
0.16
0.75
1
0.025
6
2
0.05
3
0.08
4
0.10
5
0.13
1.0
1
0.02
10
2
0.04
3
0.06
4
0.08
5
0.10
1.25
1
0.015
13
2
0.03
3
0.05
4
0.06
5
0.08
1.5
1
0.01
15
2
0.03
3
0.04
4
0.05
5
0.06
2.5
1
0.01
20
2
0.01
3
0.02
4
0.03
5
0.04
4
1
0.00
25
2
0.01
3
0.01
4
0.01
5
0.02

17
Note: Further information on protective conductor resistance and testing of
portable appliances can be found in the Code of Practice for In-service Inspection
and Testing of Electrical Equipment published by the IEE.
4. Preparation before a measurement
4.1 Visual inspection
Before starting a measurement, the user should undertake visual checks on the
mains lead, case and that the correct type and rated fuse is fitted to the appliance
under test. There should also be no evidence of damage of a nature that may
impair the electrical safety of the appliance.
4.2 Battery Voltage Check
(1) Insert batteries with reference to 7. Battery/ Fuse Replacement in this manual.
(2) Hold down Power switch 2 sec. to turn on the Tester.
(3) Check the battery indicator displayed in the upper left corner of the LCD.
If just the last one segment of the indicator remains, the battery voltage is
extremely low. Refer to 7. Battery/ Fuse Replacement and replace batteries to
perform further measurements.
If an empty battery indicator is displayed, the battery voltage is lower than the
working voltage limit. Replace batteries immediately to keep accurate
measurement.
Battery recommendation:
Use of alkaline battery is recommended. Use of other type of batteries may cause
improper indication of battery level.
4.3 Setting
4.3.1 Null setting
The IEE Code of Practice pass level for Protective conductor resistance is 0.1 Ω,
which is a low value. So even the resistance of Test Leads will affect the
measurement result.
The Tester can cancel the resistance of test lead by pressing NULL. The
procedure of Null setting is shown below. The Null function is held in memory
even when the Tester is turned off, so there’s no need to Null the lead resistance
every time. However, when replacing fuses or test leads, it is recommended to do
a Null setting again.
Note:
Null setting is possible at both Class l Test and Extension Lead Test. However,
only one Null value can be held in memory. For example, when the Null setting
is carried out at Class l Test, the set value will also be used for Extension Lead
Test (unless it is reset).

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(1) Insert Test Lead with probe (MODEL7208) into the Earth terminal of the
Tester, and contact the tip of the Test Lead with the earth contacts of the
socket on the Tester.
(2) Hold down NULL switch at least 2 sec. on any screen.
(3) The screen switches to NULL screen, and NULL measurement starts. The
LCD shows blinking “MEAS” mark and measured value during a
measurement. The measured value is saved and subtracted from the
further measured values.
(4) If the measured value is less than 3 Ω, previous NULL value is cleared and
a new value is saved. When 3 Ω or higher is measured, previous NULL
value is just cleared (NULL mark disappears).
4.3.2 Voltage setting for insulation resistance measurement
(How to change between 250V and 500V)
Two difference rated voltages, 250 V and 500 V, are available for insulation
resistance test. Press 250V/500V switch on the stand-by screen or while
measured result is being displayed at CL I/ CL II/ Extension lead test. Default
setting is 250 V.
Sets to 250 V.
Sets to 500 V.

19
4.3.3 Criteria setting for CL I leakage current test
Either 0.75 mA or 3.5 mA can be set as threshold value for CL I leakage current
test. Long press of 250V/500V switch on the stand-by screen or while measured
result is being displayed at CL I/ CL II/ Extension lead test changes 0.75 mA and
3.5 mA. Default setting is 0.75 mA.
The Code of Practice for In-service Inspection and Testing of Electrical Equipment
specifies 0.75 mA for portable or hand-held type Class I equipment and Class I
heating devices and 3.5 mA for the other Class I equipment.
Threshold setting:
0.75 mA
Blinking 3.50 mA is displayed (2 sec.),
and then the screen returns to the
stand-by screen. Now current of 3.5 mA
is set.