Kyoritsu Electrical Instruments Works, Ltd. KEW 1700, KEW 1710 Instruction Manual

INSTRUCTION MANUAL

VOLTAGE TESTER

KEW 1700 / 1710

KYORITSU ELECTRICAL
INSTRUMENTS WORKS, LTD

R

1. Features

●Designed to meet international safety standards.
IEC61243-3 / IEC61010-1
Measurement Category (CAT.) IV 600V

●Self-Diagnostic test

●AC and DC voltage test up to 690V with LEDs

and LCD ( only KEW1710 ).

●Polarity indication

●Single-pole phase test

●Phase rotation test

●Continuity test

●Auto-power ON / OFF

●Pen light for illuminating measurement points

●Two way clip for adjustable spacing of probes

●Selectable probe Tips 1.6/4mm

●Probe cover protects user and Tips

●IP65 (IEC60529)

●Compact design (Light weight and portable)

2. Safety Warnings

This instrument 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.

This instruction manual contains warnings and
safety rules which have to be observed by the
user to ensure safe operation of the instrument
and to maintain it in safe condition. Therefore,
read through these operating instructions be­fore using the instrument.

WARNING is reserved for conditions and ac-

tions that are likely to cause serious or fatal injury.

CAUTION is reserved for conditions and ac-

tions that can cause injury or instrument damage.

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.

Symbols used on the instrument

User must refer to the explanations in

Instrument with double or reinforced

Insulated personnel body protective

CAT.IV The source of the low-voltage

CE Comply with EMC and Low Voltage

.

the instruction manual.

insulation, Class II insulation

equipment up to 690V.

installation:
Eg. Electricity meters and primary
overcurrent protection devices.
Estimated transient overvoltage 8kV.

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 or your hands are wet.
(Do not use in rainfall.)

●Keep your hands and fingers behind the
barriers during measurements.

●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.

●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 modification to the
instrument.

●Extreme caution when Live circuit LED
flashes or lights on.

●Correct indication of LEDs is only guaran
teed within a temperature range of -10°C up
to

55°C (<85% RH).

3. Instrument layout

1 2

1 12/24/50/120/230/400/690V LEDs

for voltage indication

2 Live circuit LED for Single-pole phase and

Double-pole test

3 L/R LEDs for phase rotation test
4 Power LED
5 Polarity indication LEDs for voltage

6 LCD (only KEW1710 )

3

4

5

6

1 L1 probe -
2 L2 probe + (Instrument probe)
3 4mm tips
4 Barrier
5 Pen light
6 Pen light switch
7 Battery case
8 Probe clip (two way)
9 Probe protection cover

1 2

3

4

8

6

9

5

4

7

4. Preparation for measurement

4.1 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.

Instrument may power on;
* when replacing Tips, or
* due to the influence of static charge.

●Self-diagnostic test

WARNING

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

►Battery voltage is normal when Power LED is

lighting up.
When the battery voltage is below 2.4±0.1V,

Power LED flashes or goes off.

Replace batteries according to Clause 7.

►LEDs other than the Power LED should be

flashing and buzzer should sound continuously.

●Auto-power off

►Instrument is automatically powered off after

15 sec when nothing is contacted with the

probes. (Power LED goes off.)

Auto-power off may not operate;
* when replacing Tips, or
* when a significant electric magnetic field exists
in the vicinity.

4.2 Trouble-shooting

If the following problems occur, unlock the
Battery Case according to clause 7 in this manual,
and then lock it again 5 seconds later.
Then perform the self- diagnostic test (clause 4.1).

* Self- diagnostic test cannot be performed
before/after use of the instrument.
* Auto-power off doesn’t operate.

5. Handy construction

Diameter of Tip and pitch between Tips are
changeable by user.

WARNING

Remove the probes from the measurement
point when replacing Tips or changing
pitches.

5.1 Tip Replacement

►Following shows how to install 4mm Tips on

L1 probe – and L2 probe +.

►Firmly tighten up the 4mm Tips.

unscrew

Tighten

5.2 Pitch between two probes

►Pitch between 2 Tips can be 16.7mm or 19.0mm

when rotating L1 probe – by 180 degrees and
sliding in the hooks on L2 probe +.

19mm16.7mm

6. 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.

●Keep your hand and fingers behind the
barriers on the probes during
measurements.

●Due to the high internal resistance (approx.
300kΩ), the capacitive and inductive
voltages may be indicated.

6.1 Voltage test (Double-pole test)

►Connect both probes to the object under test.

►The voltage is indicated

by LEDs and LCD (only
KEW1710).

Buzzer sounds when a

threshold voltage of 50V

LED is exceeded.
Live circuit LED lights up :

> 0.3V AC
> 7V DC

►Voltage polarity is indicated in following

manner.

AC +DC -DC

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/R LED may light up.

6.2 Double-pole test without batteries

WARNING

Verification of live-circuit shouldn’t be
dependent on Double-pole test without
batteries only, but also on the test WITH
BATTERIES. (See Clause 6.1).

Only Live circuit LED flashes when Double-pole

test is carried out without batteries.

LED flashes: AC/DCV > approx. 40V
Flashing Duty: < 3s (40…100V)

< 0.3s (100…690V)

6.3 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 equipment under test isn’t
enough.
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.)

►Grasp the instrument firmly and connect the L2

probe + to the object under test.

►Live circuit LED lights up and buzzer sounds

when a voltage of approx. 100V AC or more
exists in the object under test. (Pol≥100VAC)

Grasp Firmly!!!