The KT64DL incorporates Anti Trip Technology (ATT) which electronically
bypasses RCDs when performing loop impedance tests. This saves time and
money by not having to take the RCD out of the circuit during testing and is a
safer procedure to follow.
With the ATT function enabled , a test of 15mA or less is applied between
line & earth. It enables loop impedance measurements without tripping RCDs
ted at 30mA and above.
ra
Please read this instruction manual carefully before using this equipment.
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 and take advice from a qualified person.
1 This instrument must only be used by a competent and trained person
and operated in strict accordance with the instructions. Kewtech will
not accept liability for any damage or injury caused by misus
compliance with the instructions or with the safety procedures.
2 It is essential to read and to understand the safety rules contained
in these instructions. They must always be observed when using the
instrument.
3 This instrument is designed to work in distribution systems where the line
to earth has a maximum voltage of 300V 50/60Hz and for some ranges
where line to line has a maximum
Be sure to use it within this rated voltage.
For use in the continuity testing and insulation testing modes this
instrument must be used ONLY on circuits which are de-energized.
4 When conducting tests do not touch any exposed metalwork associated
with the installation. Such metalwork may become live for the duration of
the test.
5 Never open the ins trument case (except f
repl acem ent and in thi s ca se disconnect all leads first) be caus e
dangerous voltages are present. Only fully trained and competent
electrical engineers should open the case. If a fault develops, return the
instrument to Kewtech for inspection and repair.
6 If the overheat symbol appears in the display disconnect the instrument
from the mains supply and allow to cool down.
bnormal conditions of any sort are noted (such as a faulty display,
7 If a
unexpected readings, broken case, cracked test leads, etc) do not use
the tester and return it to Kewtech for repair.
8 For safety reasons only use accessories (test leads, probes, fuses,
cases, etc) designed to be used with this instrument and recommended
by Kewtech. The use of other accessories is prohibited as they are
to have the correct safety features.
unlikely
9 When testing, always be sure to keep your fingers behind the finger
guards on the test leads.
10 During testing it is possible that there may be a momentary degradation
of the reading due to the presence of excessive transients or discharges
on the electrical system under test. Should this be observed, the test
must be repeated to obtain a correct reading. I
Kewtech.
voltage of 500V 50/60Hz.
or fuse and batte ry
f in doubt, contact
e or non-
2
11 Do not operate the function selector whilst the instrument is connected to
a circuit. If, for example, the instrument has just completed a continuity
test and an insulation test is to follow, disconnect the test leads from the
circuit before moving the selector switch.
12 Do not rotate rotary switch when test button is depressed. If the function
switch is inadvertently moved to a new function
depressed or in lock-down position the test in progress will be halted.
13 Always check the test lead resistance before carrying out tests. This
ensures the leads are ok before taking measurements. The resistance
of leads and/or crocodile clips may be significant when measuring
low resistances. If crocodile clips can be avoided for low resistance
measurements, this will red
14 When carrying out Insulation Resistance tests, always release the test
button and wait for charged capacitances to totally discharge before
removing the test leads from the test circuit.
uce the error due to lead accessories.
when the test button is
Safe Testing
3
2 Instrument
layout
Fig. 1
Input Terminal
Fig. 2
Name Operation
(1) Back Light Button S w i t c h e s on / o f f th e Ba ck l i g h t o f th e
Display(LCD)
(2) Test Button Starts measurements. (press and rotate for
lock down feature)
(3) Touch Pad Ch ecks th e elect rical po tentia l at the PE
terminal
(4) Power Switch Power Switch
(5) Function Switch Function setting (F1 ~ F4)
(6) Display (LCD) Dot Matrix LCD 160(W)X240(H)
(7) Insulation resistance LED Alerts that the test voltage is
(8) Rotary Switch Selects measurement functions.
being output
4
Main Test Lead (KAMP12)
Fig. 3
Remote Test Lead (ACC064SP)
Fig. 4
Distribution Board Test Lead (ACC065)
3 Accessories
Fig. 5
Test Lead Carry pouch
Carrying Bag
The KT64DL Multi-Function tester performs six functions in one instrument.
1 Continuity tester
2 Insulation resistance tester
3 Loop impedance tester
4 Prospective short circuit current tester
5 RCD tester
6 Voltage tester
4 Features
5
Features
Continuity and insulation resistance functions have the following features:
Live circuit warning Live Circuit warning on the display.
Continuity Null Allows aut omat ic subtractio n of test lea d
resistance from continuity measurements.
Continuity 2Ω Buzzer Buzzer sounds at 2Ω or less at Continuity
function. (Switchable on or off)
Auto discharge Electric charges stored in capacitive circuits
are disc
releasing the test button.
Insulation Resistance LED LED lights up while making measurements at
Insulation function and alerts that test voltage
is being output.
Loop impedance, PSC/PFC and RCD testing functions have the following
features:
Wiring check Three Wiring symbols indicate if the wiring of
the circuit under test is correct.
Over temperature protection
Phase angle selector The test can be selected from either the
UL value selector Select UL (limit of contact voltage) 25V or 50V.
Detects overheating of the internal resistor
(used for LOOP and PSC/PFC tests) and of the
current control MOS FET (used for RCD tests)
displaying a warning symbol and automatically
halting further measurements.
positive (0° ) or from the negative (180° )
halfcycle of voltage. This selector is used in
the RCD mode to obtain the maximum tr
of an RCD for the test selected.
Where Uc (contact voltage) exceeds UL value
at RCD testing, Uc > UL will be displayed
without starting the measurement.
harged automatically after testing by
ip time
6
ALL testing functions have the following
Touch Pad Gives an alert, when touching the Touch Pad, while the PE
terminal is connected to Line by mistake.
Auto power off Automatically switches the instrument off after a period of
approximately 10 minutes. The Auto power off mode can
only be cancelled by switching the instrument on again.
5.1 Measurement Specification
Continuity
Open Circuit
Voltage (DC)
5V ± 20%
Voltages are output when measurement resistance is under 2100 ohm.
2Ω Buzzer : Buzzer sounds when measured resistance is 2Ω or less.
2Ω Buzzer Accuracy : 2Ω±0.4Ω
Insulation Resistance
Open Circuit
Voltage (DC)
250V+25%-0%
500V+25%-0%
1000V+20% - 0%
Short Circuit
Current
Greater than
200mA
Rated Current Range Accuracy
1mA or greater
@ 250kΩ
1mA or greater
@ 500kΩ
1mA or greater
@ 1MΩ
Range Accuracy
20/200/2000Ω
Auto - Ranging
Auto - Ranging
20/200/1000MΩ
Auto - Ranging
20/200/2000MΩ
Auto - Ranging
0~0.19Ω ±0.1Ω
0.2~2000Ω ±(2%rdg+8dgt)
20/200MΩ
0~19.99MΩ:
±(2%rdg+6dgt)
20~200MΩ:
±(5%rdg+6dgt)
0~199.9MΩ:
±(2%rdg+6dgt)
200~1000MΩ:
±(5%rdg+6dgt)
0~199.9MΩ:
±(2%rdg+6dgt)
200~2000MΩ:
±(5%rdg+6dgt)
5 Specification
7
Specification
Loop Impedance
Function
L-PE
L-PE
(ATT)
L-N / L-L
*1: at 230V
*2: 230V+10%-15%
*3: voltages except for *2
PSC (L-N/L-L) / PFC (L-PE)
Function
PSC
PFC
PFC
(ATT)
*4: at 230V
Rated
Voltage
100~260V
50/60Hz
100~260V
50/60Hz
50/60Hz
L-N:100~300V
L-L:300~500V
Rated
Voltage
100~500V
50/60Hz
100~260V
50/60Hz
100~260V
50/60Hz
Nominal Test Current at
N-PE: 10mA/approx. 5s
0Ω External Loop:
Magnitude/Duration(*1)
20Ω: 6A/20ms
200Ω: 2A/20ms
2000Ω: 15mA/500ms
L-N: 6A/60ｍs
20Ω: 6A/20ms
Nominal Test Current
at 0Ω External Loop:
Magnitude/
Duration(*4)
6A/20ms
6A/20ms
2A/20ms
15mA/500ms
L-N: 6A/60ms
N-PE: 10mA/approx. 5s
Range Accuracy
20/200/2000Ω
Auto-Ranging
20/200/2000Ω
Auto-Ranging
L-N < 20Ω
20Ω
Range Accuracy
2000A/20kA
Auto-Ranging
±(3%rdg+4dgt) *2
±(3%rdg+8dgt) *3
±(3%rdg+6dgt) *2
±(3%rdg+8dgt) *3
±(3%rdg+4dgt) *2
±(3%rdg+8dgt) *3
PSC/PFC
accuracy is
derived from
measured loop
impedance
specification
and measured
voltage
specification
8
RCD
Function Rated Voltage
X1/2
X1 +2%~+8% 0%~+10%
X5 +2%~+8% 0%~+10%
Ramp ( )
Auto
RCD Trip Current Duration
Function Type
Trip
Current
Duration
(ms)
230V+10%-15%
50/60Hz
Depending on the accuracy at each function.
Measurement sequence:
X1/2 0°→X1/2 180°→X1 0°→X1 180°→X5 0°→X5 180°
Measurements with x5 are not carried out for RCDs with nominal
current of 100mA or more.
AC 2000 2000 2000 2000 2000 2000
G
X1/2
X1
X5
Ramp
)
(
A 2000 2000 2000 2000 2000 n.a
AC 2000 2000 2000 2000 2000 n.a
S
A 2000 2000 2000 2000 2000 n.a
AC 550 550 550 550 550 550
G
A 550 550 550 550 550 n.a
AC 1000 1000 1000 1000 1000 n.a
S
A 1000 1000 1000 1000 1000 n.a
AC 410 410 410 n.a n.a n.a
G
A 410 410 410 n.a n.a n.a
AC 410 410 410 n.a n.a n.a
S
A 410 410 410 n.a n.a n.a
AC Goes up by 10% from 20% to 110%
G
A n.a
AC Goes up by 10% from 20% to 110%
S
A n.a
Trip Current
AC Type A Type
-8%~-2% -10%~0%
±4% ± 10%
RCD Trip Current Duration
10 30 100 300 500 1000
300ms×10 times
500ms×10 times
Specification
Accuracy
Trip Time
±(1%rdg+3dgt)
n.a
n.a
Volts
Function Rated voltage
Volts
Frequency
25~500V
45~65Hz
25~500V
45~65Hz
Measuring
Range
25~500V ±(2%rdg+4dgt)
45~65Hz ±(0.5%rdg+2dgt)
Accuracy
9
Specification
Possible number of tests with fresh batteries.
Continuity :Approx. 2000 times min. at load 1Ω
Insulation Resistance :Approx. 1000 times min. at load 1MΩ (1000V)
LOOP/PFC/PSC :Approx. 1000 times min. (ATT)
RCD :Approx. 2000 times min. (G-AC X1 30mA)
Reference Conditions
Ambient temperature 23±5℃
Relative humidity 45% to 75%
Nominal system voltage and
frequency
Altitude Less than 2000m
5.2 Operating error
Continuity (EN61557-4)
Operating range compliant with
EN61557-4 operating error
0.20~1999MΩ ±30%
The influencing variations used for calculating the operating error are denoted as follows;
Temperature : 0℃ and 35℃
Supply voltage : 8V to 13.8V
Insulation Resistance(EN61557-2)
Volt
250V 0.25~199.9MΩ
1000V 1.00~1999MΩ
The influencing variations used for calculating the operating error are denoted as follows;
Temperature : 0℃ and 35 ℃
Supply voltage : 8V to 13.8V
Operating range compliant with
EN61557-2 operating error
230V, 50Hz
Maximum percentage
operating error
Maximum percentage
operating error
±30%500V 0.50~999MΩ
Loop Impedance(EN61557-3)
Volt
L-PE 0.40~1999Ω
L-N 0.40~19.99Ω
The influencing variations used for calculating the operating error are denoted as follows;
Temperature : 0 ℃ and 35℃
Phase angle : At a phase angle 0° to 18°
System frequency : 49.5Hz to 50.5Hz
System voltage : 230V+10%-15%
Supply voltage : 8V to 13.8V
Operating range compliant with
EN61557-3 operating error
Maximum percentage
operating error
±30%
10
RCD(EN61557-6)
Function Operating error of trip current
X1/2 -10%~0%
X1, X5 0%~+10%
Ramp -10%~+10%
The influencing variations used for calculating the operating error are denoted as follows;
Temperature : 0 ℃ and 35 ℃
Earth electrode Resistance (shall not exceed below) :
IΔn (mA)
10 2000 2000
30 600 600
100 200 200
300 130 65
500 80 40
1000 40 20
System voltage: 230V+10%-15%
Supply voltage : 8V to 13.8V
5.3 General specification
Instrument dimensions 235 X 136 X 114mm
Instrument weight:- 1300g (including batteries.)
Reference conditions Speci ficat ions are ba sed on the following
1. Ambient tempe
2. Relative humidity 45% to 75%
3. Position: horizontal
4. AC power source 230V, 50Hz
5. DC power source: 12.0 V, ripple content 1%
6. Altitude up to 2000m, Indoor use
Battery type Eight LR6 or R6 batteries.
Operating temperature 0 to +40℃ , relative humidity 80% or less, no
and humidity. condensation
Storage temperature -20 to +60℃ , relative humidity 75% or less,
and humidi
ty no condensation.
Earth electrode resistance (Ω max.)
UL50V UL25V
Table.1
conditions except where otherwise stated:-
rature: 23±5° C:
or less
Specification
11
Specification
Display Dot Matrix LCD 160(W) X 240(H) pixels.
Overload protection The continuity test circuit is protected by a
0.5A/600V fast acting (HRC) ceramic fuse
mounted in the battery compartment, where a
spare fuse is also stored.
The ins u latio n re sist a n ce t e st c i r c uit is
protected by a resistor against 1000 V AC for
10 seconds.
5.4 Applied standards
Instrument operating IEC/EN61557-1,2,3,4,6,10 (2007)
andard
St
Safety standard IEC/EN 61010-1(2001),
CATIII (300V) -Instrument
IEC/EN 61010-031(2008),
CATII (250V)-Test Lead KAMP12
CATIII (600V)-Test Lead ACC065
CATIII (1000V)-Test Lead ACC064SP
Protection degree IEC 60529 (1989 + A1) IP40
EMC EN 61326
This manual and product may use the following symbols adopted from
International Safety Standards;
CAT.III Designed to protect against transient overvoltag
wiring installation (low-voltage distribution level)
Equipment protected throughout by DOUBLE INSULATION
or REINFORCED INSULATION;
es in a building
Caution (refer to accompanying documents)
Caution, risk of electric shock
Protection against wrong connection is up to 500V
Earth Ground
12
5.5 List of Display Message
Low battery warning
Tem p er at ur e mon i t o r fo r int e r n a l re si st ance,
available at Loop, PSC/PFC & RCD function. Further
measurements are suspended until the
disappears.
Measuring Measurements in progress
Live Circuit Live circuit warning (Continuity / Insulation Function)
PE Hi V Caution : Presence of 100V or more at PE terminal,
appears when touching the Touch Pad
L-N >20Ω Alert : Presence of 20Ω or more between Line -
Neutral at ATT measurement
Noise Caution : Presence of noise in the circuit under test
during ATT measurement. ATT function should be
disabled to continue measurements.
N - PE Hi V Caution: Presence of high voltage between NEUTRAL
- EARTH during ATT measurement. ATT function
should be disabled to continue measurements.
Uc > UL Caution : Uc at RCD measurement is exceeding the
preset UL value (25 or 50V).
no Error message : When on the RCD function, RCD
tripped before measuring RCD trip time. Selected
IΔn value may not be correct.
n the LOOP, PSC/PFC function, supply may
When o
have been interupted.
L-PE● L-N● #○ Wiring check for LOOP, PSC/PFC function
OK
× NO Appears when any results failed during the RCD Auto
-- - - V Appears when the test lead connection is not correct.
Appears when all results passed during the RCD Auto
Test function.
Test function.
symbol
Specification
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