KEWTECH KT171 Voltage Electric Tester Instruction Manual

: June 13, 2024
: KEWTECH

KEWTECH KT171 Voltage Electric Tester Instruction Manual

Features

Designed to meet international safety standards. 1EC61243-3 / 61010-1 / 61010-031 / 61557-7 Measurement Category (CAT) IV 600V
Self-Diagnostic test
AC and DC voltage test up to 690V with LEDs and LCD ( only KT171 )
Polarity indication
Single-pole phase test
Phase rotation test
Continuity test
Auto-power ON / OFF
Pen light for illuminating measurement points
Selectable probe tip diameters 2/4mm
CAT.III/IV caps copes with the latest European Safety standard for 4mm tips CAT.III 690V/ CAT.IV 600V
Probe protection cover protects user and test tips • IP65 (IEC60529) • Compact design (Light weight and portable)

Safety Warnings

This instrument has been designed to be used by skilled persons and in accordance with safe methods of work, and has been designed, manufactured and tested according to IEC 61010/61243: Safety requirements for Electronic Measuring apparatus, and is supplied having passed rigorous quality procedures.

The operating instructions contain information and Cautions required for safe operation and use of the instrument. Before using the instrument, read the operating instructions carefully and follow them in all respects.

Failure to follow the instructions or to comply with warnings and cautions may result in life-threatening injuries to the user and damage to the instrument andfor device under test.

WARNING is reserved for conditions and actions that are likely to cause serious or fatal injury.
CAUTION is reserved for conditions and actions that can cause injury or instrument damage.

Symbols used on the instrument

| User must refer to the explanations in the instruction manual.
---|---
| Instrument with double or reinforced insulation, Class II insulation.
| Insulated personnel body protective equipment up to 690V.
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).
CE| Comply with EMC and Low Voltage Directive.

WARNING

Never make measurement on a circuit in which the electrical potential exceeds 690V.
Do not attempt to make measurement in the presence of flammable gasses, as the use of the instrument may cause sparking, which could lead to an explosion.
Never attempt to use the instrument if it’s surface o your hands are wet. (Do not use in rainfall
Never unlock and open the Battery case during measurements.
Verify proper operation on a known source before use or taking action as a result of the indication after use. o Never attempt to make any measurement if any abnormal conditions, such as a broken case or exposed metal parts are present on the Instrument or test probes.
Do not make any disassembly or any modification to the instrument.
Extreme caution when Live circuit LED blinks or lights on.
Correct indication of LEDs is only guaranteed within a temperature range of -15°C up to 55°C (<85% RH).

Instrument layout

Product Overview

12/24/50/120/230/400/690V LEDs for voltage indication
Buzzer
L/R LEDs for phase rotation test
Live circuit LED for Single-pole phase and Double-pole test
Rx LED for Continuity test
Polarity indication LEDs
LCD (only KT171)
L1 probe –
L2 probe + (Instrument probe)
CAT.IINV caps (4mm test tip caps)
4mm (changeable) tips
Pen light
Probe Clip
Finger Guard
Pen light switch
Probe protection cover
Battery case

Preparation for measurement

Auto-power-on / Self-diagnostic test

Auto-power-on
- Short-circuiting the probes as follows powers on the instrument automatically and goes into a Self diagnostic test. If the tester is not in sleeping mode, please wait for 10 seconds and carry out the self diagnostic test.

Instrument may power on:

when replacing Tips, or due to the influence of static charge.
- When the battery voltage is below 2.4£0.1V, Rx LED blinks (and the battery symbol will also light up as for KT171) which indicates that the battery capacity is low.

Self.diagnostic test

WARNING
Do not use the instrument when
abnormality is found at Self-diagnostic test.

Battery voltage is normal when all LEDs are lighting up and the buzzer is beeping.
When the battery voltage is below approx. 2.6V, L and/or R LEDS will not light up and the Phase rotation test of Clause 6.4 will not operate.
When Rx LED blinks, all the functions except for the double-pole test without batteries of Clause 6.2 will not be guaranteed.
When the necessary functions will not operate, please replace the batteries according to Clause 7.
Auto-power off
- Instrument is automatically powered off after 10sec when there is no signal contacted to the probes.

Auto-power off may not operate:

when replacing Tips, or
when a significant electric magnetic field exists in the vicinity.

Handy construction

Diameter and length (adapter cap) of the Tip are changeable by user.

WARNING
Remove the probes from the measurement point \when replacing Tips or Caps.

Tip Replacement

Following shows how to install 4mm Tips on L1 probe —and L2 probe .
Firmly tighten up the 4mm Tips.

CAT.IIINV Cap Replacement

Following shows how to install the CAT.IIIIV cap on L1 probe — and L2 probe +.
Gently put the CAT.III/IV cap onto the probes.
Do not install the CAT.III/IV cap when the 4mm Tips is installed.

Measurement

WARNING

Carefully check Clause 2 as well.
Self-diagnostic test should be done prior to measurements and confirm LED and buzzer works properly.
Verify proper operation on a known source before and after use even if the Self-diagnostic test is OK.
Make sure that you can hear the buzzer at locations with a high background noise.
Keep your hand and fingers behind the finger guards on the probes during measurements.
Due to the high internal resistance (approx. 200kQ), capacitive and inductive voltages (interference voltages) may be indicated.
Make sure that the test probes have good contact. Oxide layers on the device under test may influence the measurement.
Be sure to attach the CAT.II/IV caps when measuring at the CAT.IIIIV environment.

Voltage test (Double-pole test)

Double-pole test

Connect both probes to the device under test.
The voltage is indicated by LEDs and LCD (only KT171)

Live circuit LED lights up and Buzzer sounds when the threshold voltage of 50V LED is exceeded.

Voltage polarity is indicated in following manner.

12V LED lights up when exceeds 7V (Threshold voltage of 12V LED).
Instruction

12V LED blinks at Ac below approx. 7V M7 only

NOTE

This instrument can make measurements between L-PE without tripping RCDs.
When the L2 probe + is the positive (negative) potential, the Polarity indication LED indicates “+DC” (“DC’).
L/RLED may light up.

Double-pole test without batteries

Respective LEDs light up even when double-pole test carried out without batteries.

Only the threshold voltage of the 12V LED changes to approx. 12V or more.
The threshold voltage of other LEDs
(24/50/120/230/400/690V) are according to the Specification. (See Clause 8)

Single-pole phase test

WARNING

Carefully handle L1 probe — when it is not in use.
Function of this test may not be fully achieved :if the insulation condition of user or of the device under test is not sufficient. :if the device under test contains much high frequency component which exceeds 60Hz. Verification of live-circuit shouldn’t be dependent on this Single-pole phase test only, but also on the Double-pole test. (See Clause 6.1.)
Hold the instrument firmly and connect the L2 probe + to the device under test.
Live circuit LED lights up and buzzer sounds when a voltage of approx. 100V AC or more exists in the device under test.

Phase rotation test

L LED and R LED for Phase rotation test may operate on various wiring systems, but effective testing result can be obtained only on Three-phase 4-wire system.

Hold the instrument firmly and connect both probes to the device under test
Phase-to-phase voltage is indicated by each Voltage LED.
R LED lights up for Right rotary field.
L LED lights up for Left rotary field.

The principle of measurement
The instrument detects the phase rising order regarding the user as EARTH.

NOTE

Function of this test may not be fully achieved: if the insulation condition of user or of the device under test is not sufficient. :if the device under test contains much high frequency component which exceeds 60Hz

Continuity test

WARNING
Make sure the device under test isn’t live.

Rx LED lights up and buzzer should sound continuously.

Pen light function

(lluminating the Measurement Point) Pen light iluminates the measurement point in dimly Iit area.

Pressing the Pen light switch to turn on the light and after (10s) it wil turn itself off.

NOTE

Using the Pen light shortens the battery life.

Battery Replacement

WARNING
Remove the probes from any testing point, when opening the Battery case.

Follow the procedure below and replace batteries with new ones (type IEC LRO3 1.5V).

Unlock the Battery case with a coin-shaped object.
Lock

Unlock

Pull out the Battery case and replace the batteries. Insert new batteries according to the engraving on the Battery case.
Insert the Battery case into the instrument and firmly lock the case again.

WARNING
Confirm that the Battery case is properly locked prior to measurements.

Specification

Voltage test

Voltage range| 12…690V AC/DC
Peak current| 1s 3.5mA (at 690V)
Measurement Duty| 305 ON (operation fime) 2405 OFF (recovery time)
internal bafery consumption| ‘Approx. 80 mA (battery 3V, measuring 690V AC)
Batlery lfe| “Approx. 10000perations. (30s ON / 240s OFF duty)
LED (KT170 /KT171)
Nominal voltage| 12124/50/120/230/400/690V AC (16…400Hz), DC()
Tolerance (Threshold voltage)| Light on at more than 743V (12V LED) $ 1813V (24V LED) +37.584V (50V LED) + 75%:25% of nominal voltage (120/230/400/690V LED)
Response time| 065 at 100% of each nominal voltage
LCD (only KT171)
Range / Resolution (Auto-range)| 300V (6.0…299.9) / 0.1V 690V (270…759ac/710dc) / 1V
Accuracy (23t5°C)| 15V (7…100V) +1%45dgt (100…690V) AC(16…400Hz), DC(%)
Over limit indication| oL
Response time| Approx. 1 at 90%-110% of each voltage
Single-pole phase test
Voltage range| 100…690V AC (50/60Hz)
Phase rotation test
System| Three-phase 4-wire system 200,..690V phase-to-phase (100…400V earth- to-phase) AC 50/60Hz
Phase range| 12045 degree
Continuity test
Detection range| 0…400kQ + 50%(23£5°C)
Test current| Approx.1.5A (battery 3V, 0Q)
Internal battery consumption| ‘Approx. 80 mA (battery 3V, 00)
Reference condition
Battery| 3V (IEC LR03 1.5V x 2)
Temperature| 15…55°C operation -20…70°C storage (KT170) -20…60°C storage (KT171) No condensation
Humidity| Max 85% RH
Used Location| Altitude up to 2000m
Safety
Standard| IEC(EN)61010-1:2010(2010) IEC(EN)61243-3:2009(2010) IEC(EN)61010-031:2008(2008) IEC(EN)61557-7:2007(2007)
Category| CAT.Ill 690V, CAT.IV 600V
Pollution degree| 2
1P code| 1P65 (IEC60529)
Size
Dimensions| 246 x 64 x 26mm
Weight| 190g (including batteries)

Cleaning and storage

CAUTION

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.
Put the Probe protection cover on the Tips while not in use. Otherwise it may cause an injury.
Remove batteries when the instrument will not be in use for a long period

For Environment

This instrument is subject to WEEE Directive (2002/96/EC).
Please contact your nearby KEWTECH = dealer for disposal.

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

Tokyo, 152-0031 Japan
Phone : +81-3-3723-0131
Fax : +81-3-3723-0152
URL : http:/www.kewItd.com.jp
E-mail : [email protected]
Factory : Ehime, Japan

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