Kewtech KT1795 User manual

KT1795
Current & Voltage Tester
Instruction
Manual

Content
1. Introduction / Product Package
2. Safety Measures
3. Danger of electric shock and other
dangers
4. Intended Use
5. Instrument Layout
6. Preparation for tests
6.1 Auto-power on/ switching on
6.2 Auto-power off
6.3 Self-Test
7. Conducting Tests
7.1 Voltage Test
7.2 Single-pole phase test
7.3 Phase Rotation Test
7.4 Trip Test of RCD / Lower
Impedance Voltage test
7.5 Continuity test (Rx) / Diode test
7.6 Resistance test
7.7 Torch Light
7.8 Data Hold
8. Battery Replacement
9. Technical Data
10. Cleaning and storage
11. Safety advices
After unpacking, check that the instrument is
undamaged.
The product package comprises:
1 pc Tester KT1795
2 pcs batteries 1.5V, IEC LR03
1 pc instruction Manual

References marked on instrument or in instruction
manual:
Warning of a potential danger, follow with instruction
manual.
Reference! Please use utmost attention.
Caution! Dangerous voltage. Danger of electrical shock.
Equipment for working under live voltage
Continuous double or reinforced insulation category II
IEC 536 / DIN EN 61140.
Conformity symbol, the instrument complies with the
valid directives. It complies with the EMV Directive
(2014/30/EU), Standard EN 61326-1 are fullled. It also
complies with the LowVoltage Directive (2014/35/EU),
Standard EN61243-3:2014 is fullled.
UK Conformity compliance mark
Tester complies with the standard
(2012/19/EU) WEEE.
The instruction manual contains information
and references, necessary for safe operation and
maintenance of the tester.
Prior to using the tester (commissioning/ assembly)
the user is requested to thoroughly read the
instruction manual and comply with it in all sections.
Failure to read the tester manual or to comply with the
warnings and references contained herein may result in
serious bodily injury or tester damage.
The respective accident prevention regulations
established by the professional associations are to be
strictly enforced at all times.
Voltage tester is not a measurement device, it is only
allowed to use for testing purposes.
1.0 INTRODUCTION / PRODUCT PACKAGE
The voltage tester KT1795 is a universally applicable tester
for voltage testing, continuity testing, rotary eld testing and
trip testing of RCD.
The voltage tester KT1795 is characterized by the following
features:
• Designed to meet international safety standards.
EN61243-3:2014
• Measurement Category (CAT.) IV 600V, III 1000V
• AC and DC voltage test up to 1000Vac and 1500Vdc
with LCD
• Polarity indication
• Single-pole phase test
• Phase rotation test
• Trip Test of RCD
• Continuity test
• Resistance test
• Auto-power ON / OFF
• Torch light
• IP64 (IEC60529)
• Lower load impedance option to clear ghost or
interference voltages

3.0 DANGER OF ELECTRIC SHOCK AND OTHER
HAZARDS
To avoid an electric shock, observe the precautions when
working with voltages exceeding 120 V (60 V) DC or
50 V (25 V) eff AC. In accordance with DINVDE these
values represent the threshold contact voltages (values in
brackets refer to limited ranges, e.g. in agricultural areas).
The tester must not be used with the battery
compartment open
Before using the tester, ensure that the test lead and
device are in perfect working order. Look out e.g. for
broken cables, damaged insulation or leaking batteries.
Hold the tester and accessories by the designated grip
areas only, the display elements must not be covered.
Never touch the test probes.
The tester may be used only within the specied
measurement ranges and in low-voltage installations up
to 1000VAC and 1500VDC.
The tester may be used only in the measuring circuit
category it has been designed for.
Before and after use, always check that the tester is in
perfect working order (e.g. on a known voltage source
such as the KEWPROVE3 opening unit).
Make sure that the cables tested for current are double
insulated.
The tester must no longer be used if one or more
functions fail or if no functionality is indicated.
It is not permitted to use the tester during rain or
precipitation.
An accurate display is guaranteed only within a
temperature range of -5°C to +40°C at relative air
humidity less than 85%.
If the safety of the user cannot be guaranteed, the tester
must be switched off and secured against unintentional
use.
Safety is no longer guaranteed e.g. in the following cases:
− obvious damage
− broken housing, cracks in housing
− if the tester can no longer perform the required
measurements/ tests
− stored for too long in unfavourable conditions
− damaged during transport
− leaking batteries
2.0 SAFETY MEASURES
The testers have been constructed and tested in
accordance with the safety regulations for voltage
testers and have left the factory in a safe and perfect
condition.
The operating instructions contain information
and references required for safe operation and
use of the tester. Before using the tester, read the
operating instructions carefully and follow them in all
respects.

The tester complies with all EMC regulations.
Nevertheless it can happen in rare cases that electric
devices are disturbed by the electrical eld of the
tester or the tester is disturbed by electrical devices.
Never use the tester in explosive environment
Tester must be operated by trained users only
Operational safety is no longer guaranteed if the tester
is modied or altered.
The tester may be opened by an authorized service
technician only.
The current test may only be performed on double
insulated cables.
If the indication “voltage present” appears although the
checked part is considered as disconnected, it is recom-
mended to verify additional measures if the measured
voltage is an interference voltage or not.
4.0 INTENDED USE
The tester may be used only under the conditions and
for the purposes for which it was designed.Therefore,
observe in particular the safety instructions and the
technical data including environmental conditions.
5.0 INSTRUMENT LAYOUT
1. Test Probe, L1
2. Test Tip, L2
3. Torch Light
4. Display
5. Torch Light Button / selects
resistance measurement
6. Low impedance
Push buttons / RCD test
7. Main body
8. Battery door

Control elements
1. Buzzer hole for sound indication
2. Single Pole Test ELV Warning
3. Continuity Test
4. Rotary eld
5. LCD Display indication voltage,
polarity, resistance and low battery
6. LED’s indicating 12V and polarity
7. Voltage Indication
6.0 PREPARATION FOR TESTS
6.1 Auto-power-on / switching on
• The tester switches on when it detects continuity,
an AC or DC voltage above approx. 6V or a live
phase on L2 (single pole test).
• It can be switched on with the torch light button.
6.2. Auto-power off
• Tester is automatically powered off after 30 sec
when there is no signal contacted to the probes.
• The torch light switches off after approx. 30 sec.
6.3 Self-Test
• When voltage tester is off short both probes L1
and L2, hold probes shorted.
• All LEDs, all symbols on LCD and buzzer will be
on for a 2s.
• Self-test will start automatically when replacing
batteries.
If some of LEDs is not ON, or some LCD symbols
are not ON or Buzzer or Torch light is not ON, the
device is not safe for use. Replace the battery and
start Self-Test again. If some of these indications

are not ON again, the device is not safe for use and
must NOT be used.
Do not use tester while Self-Test procedure is
activated.
7.0 CONDUCTING TESTS
7.1 Voltage test
• Connect both probes to the object under test.
• The voltage is indicated by LEDs and LCD
• Buzzer sounds when a threshold voltage of 50VAC
or approx. 120VDC is exceeded.
• Voltage polarity is indicated in following manner.
➘AC: + and – 12V LED are on
➘+DC: +12V LED is on
➘-DC: -12V LED is on (and “-“ is shown on LCD)
☞When the L2 probe + is the positive (negative)
potential, the Polarity indication LED indicates
“+DC” (“-DC”).
☞During voltage test, L or R LED may light up.
☞In case of low batteries, the ELV LED lights up
>50VAC, >120VDC
7.2 Single-pole phase test
☞Function of this test may not be fully achieved if the
insulation condition/ grounding conditions of user
or of the equipment under test aren’t good enough.
Verication of live-circuit shouldn’t be dependent on
this Single-pole phase test only, but on the voltage
test.
• Hold the tester well in your hand. Connect the “L2
+” probe to the object under test.
Single pole LED lights up and buzzer sounds when
a voltage of approx. 100V AC or more exists in the
object under test. (Pol≥100VAC).
7.3 Phase rotation test
• L LED and R LED for Phase rotation test may ope-
rate on various wiring systems, but effective testing
result can be obtained only on three-phase 4-wire
system.
• Hold the tester good in your hand and connect
both probes to the object under the test.
•Phase-to-phase voltage is indicated byVoltage LEDs.
• R LED lights up for Right rotary eld.
• L LED lights up for Left rotary eld.
• Measurement principle:The instrument detects the
phase rising order regarding the user as earth.
☞Function of this test may not be fully achieved if the
insulation condition/ grounding conditions of user
or of the equipment under test is not good enough.

7.4 Trip Test of RCD / Lower impedance
voltage test
☞For voltage tests in systems with RCD (earth
leakage circuit breakers) an RCD can be tripped
with a 10mA or 30mA nominal leakage current on
single phase AC 230V power system.
• Connect probes “L1” and ”L2” between L and PE
of RCD protected system.
• Press simultaneously both of Trip TEST RCD Push-
buttons.
• The RCD should trip.
• This function is also used to lower the impedance
of the test load to clear a higher level of 'ghost' or
interference voltage.
7.5 Continuity test (Rx) / Diode test
The test circuit/object shall be de-energized before
measurement.
• Check for the absence of voltage by conducting a
two pole voltage test on the test object.
• Connect both test probes together or press the
Torch Light Pushbutton to switch ON the tester.
• Connect both test probes to the test object. For
continuity (up to approx. 500k�) the Continuity
Test LED – Rx is on and the buzzer is active.
• Continuity test automatically switches OFF after
approx. 30 seconds if no continuity is detected.
When tester is OFF, If continuity is detected it will
be automatically switched on again.
7.6. Resistance test
Make sure that object test isn’t live.
• Switch into resistance measurement by short
press of torch light. Connect both test probes
to the object under test. Resistance up to 2k
show on LCD display. For resistance less than 30
Ohm buzzer sounds continuously to indicate low
continuity.
• Second short press switches into voltage
measurement
7.7 Torch light
• Pressing the torch light button will turn on the
light and after approx. 30s it will turn itself off.
• When torch light is on, pressing the torch light
button for more than 6s will turn off the torch.
7.8 Data Hold
Under data hold mode,The LCD screen will only
show the last saved measured voltage value.There is
no auto refresh of LCD screen reading under Data
Hold mode whether the voltage tester is connected
to energized or non-energized circuit.The LED
voltage indicators will always show the actual
voltage of the circuit under measurement.

8.0 BATTERY REPLACEMENT
Remove the probes from any testing point, when
opening the battery case. Batteries are dead when
the continuity test with both the test probes
connected cannot be done anymore and the low
battery symbol is shown in the LCD.
Follow the procedure below and replace batteries
with new ones (type IEC LR03 1.5 V).
• Unscrew the battery door
• Pull out the battery door and replace the batteries.
Insert new batteries according to the engraving on
the battery door.
• Re-assemble battery door.
Conrm that the battery door case is properly
locked prior to measurements.
• After pressing the Torch Light push button for
more than 2 seconds, the data hold function is
activated and replies with a short sound.The
LCD screen shows “the last measured value” and
the symbol “HOLD”.The hold function can be
deactivated manually by pressing the Torch Light
push button again. Function deactivation will be
announced with a short sound.

9.0 TECHNICAL DATA
Voltage Range
6…1000V AC (40…400Hz),
6…1500V DC(±)
LED nominal Voltage
12/24/50/120/230/400/690/
1000V,AC (40…400Hz),
DC(±)
LED tolerances
EN 61243-3
ELV indication LED
>50V AC, >120V DC
Response time
<1s at 100% of each nominal
value
LCD Range
6…1000VAC, 1500VDC(±)
LCD Resolution
1V
LCD Accuracy
±3%±3dgt
(6…1000Vac/1500Vdc)
LCD Overrange
indication
“OL”
Peak current with
push buttons not
pressed
Is <3.5mA (at 1000V)
Peak current with
push buttons pressed
Is <300 mA
Measurement Duty
30 s ON, 240s OFF
Internal battery
consumption
approx. 80mA
Single-pole phase
test voltage range
100…1000V AC (50/60Hz )
Phase rotation test
170…1000V phase-to-phase,
AC 50/60Hz
Continuity test
0…500 k� + 50%
Resistance
measurement
0-1999 � ±(5% + 10dgt);
Resolution: 1 �
Battery
3V (IEC LR03 1.5V x 2)
Temperature
-5…40°C operation;
-20…70°C storage;
No condensation
Humidity
max. 85% RH
Altitude
up to 2000 m
Overvoltage
CAT. III 1000V/ CAT. IV 600V
Standard
EN/IEC 61243-3:2014
Pollution
Degree 2
Protection
IP64

10.0 CLEANING AND STORAGE
Tester does not need any special maintenance if
used according to user manual.
Remove tester from all test points before cleaning.
Use a lightly damp cloth with neutral detergent
for cleaning the instrument. Do not use abrasives
or solvents.
Do not expose the instrument to direct sun light,
high temperature and humidity or dewfall.
Remove batteries when the instrument will not be
in use for a long period.
11. SAFETY ADVICES
• Depending on the internal impedance of the voltage
detector there will be a different capability of
indicating the presence or absence of operating
voltage in case of the presence of interference
voltage.
• A voltage detector of relatively low internal
impedance, compared to the reference value of
100 k � , will not indicate all interference voltages
having an original voltage value above the ELV level.
When in contact with the parts to be tested, the
voltage detector may discharge temporarily the
interference voltage to a level below the ELV, but it
will be back to the original value when the voltage
detector is removed.
• When the indication “voltage present” does not
appear, it is highly recommended installing earthing
equipment before work.
• A voltage detector of relatively high internal
impedance, compared to the reference value of
100 k � , may not permit to clearly indicate the
absence of operating voltage in case of presence of
interference voltage.
• When the indication “voltage present” appears on
a part that is expected to be disconnected of the
installation, it is highly recommended conrming
by another means (e.g. use of an adequate voltage
detector, visual check of the disconnecting point of
the electric circuit, etc.) that there is no operating
voltage on the part to be tested and to conclude
that the voltage indicated by the voltage detector is
an interference voltage.
• A voltage detector declaring two values of internal
impedance has passed a performance test of
managing interference voltages and is (within
technical limits) able to distinguish operating voltage
from interference voltage and has a means to
directly or indirectly indicate which type of voltage
is present.

Certicate of Conformity
and Warranty
This instrument has been calibrated
using equipment which has itself been
calibrated to standards traceable to
International Standards monitored by
BIPM (International Bureau of Weights
and Measures).
This certicate guarantees that the
product has been fully inspected and
conforms to all the relevant published
specications.
FREE TWO YEAR GUARANTEE
Kewtech’s TwoYear Warranty enhances
customers’ legal rights. It covers all
manufacturing defects for a two year
period but Kewtech reserves the right to
exclude abuse or accidental damage.
RE-CALIBRATION SERVICE
Regular re-calibration is recommended
for this instrument. Kewtech recommends
that with normal use the instrument be
calibrated at least once in every 12 month
period.When the instrument is due for
re-calibration return it to the address
below marked for the attention of the
Calibration Department.
Simply go to kewtechcorp.com
to register your instrument
Product:
KT1795 Current Voltage Detector
Kewtech Corporation Limited
Unit 2, Shaw Wood Business Park, Shaw Wood Way,
Doncaster DN2 5TB 01494 792 212