Kyoritsu Electrical Instruments Works, Ltd. KEW3121B Manual de usuario

KEW3121B/3122B

Instruction manual

High voltage insulation resistance tester

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Contents

1. Safety warnings ................................................................... 1

2. Features .............................................................................. 5

3. Specication ........................................................................ 6

4. Instrument layout ................................................................. 9

5. Getting started .................................................................. 10

5-1 Mechanical Zero Adjustment ....................................... 10

5-2 Battery Check .............................................................. 10

6. Measurement ..................................................................... 11

6-1 Insulation resistance measurement ............................. 11

6-2 Continuous measurement ........................................... 13

6-3 Voltage characteristics at measuring terminal ............. 13

6-4 Use of Guard terminal ................................................. 14

7. Battery replacement .......................................................... 15

8. How to remove the Hard case ........................................... 16

9. Cleaning Meter Cover ........................................................ 17

10. Accessories ..................................................................... 18

10-1 Metal parts for Line Probe, and replacement ........... 18

10-2 How to use the adaptor for recorder ......................... 19

10-3 Line probe with alligator clip(optional accessory) ..... 19

11. Disposing the Product ...................................................... 20

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1. Safety warnings

○ This instrument has been designed, manufactured and tested

according to IEC 61010: Safety requirements for Electronic

Measuring apparatus, and delivered in the best condition after

passing quality control tests. This instruction manual contains

warnings and safety rules which must 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

● Read through and understand instructions contained in this

manual before starting to use the instrument.

● Keep the manual at hand to enable quick reference whenever

necessary.

● The instrument is to be used only in its intended applications.

● Understand and follow all the safety instructions contained in

the manual. 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.

○ The symbol # indicated on the instrument means that the user

must refer to the related parts in the manual for safe operation

of the instrument. It is essential to read the instructions wherever

the symbol #appears in the manual.

#DANGER is reserved for conditions and actions that are

likely to cause serious or fatal injury.

#WARNING i s 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.

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#DANGER

● Do not use this instrument to test the circuits in which 300V

or higher potentials exist in Measurement category IV (CAT

IV) environment or 600V or higher potentials exist in CAT III

environment.

● Do not attempt to make measurements in the presence of

ammable gasses. Otherwise, the use of the instrument may

cause sparking, which can lead to an explosion.

● Never attempt to use the instrument if its surface or your

hand is wet.

● Be careful not to short-circuit the power line with the metal

part of the test leads when measuring a voltage. It may

cause personal injury.

● Do not exceed the maximum allowable input of any measuring

ranges.

● Do not press the Test button when connecting the test leads

to the instrument.

● Never open the Battery compartment cover during a

measurement.

● To prevent possible electrical shock, do not touch the circuit

under test during an insulation resistance measurement or

right after a measurement.

#WARNING

● Never attempt to make any measurements if any abnormal

conditions such as broken case and exposed metal parts are

noted.

● Do not rotate the Function switch with the test leads

connected to the object under test.

● Do not install substitute parts or make any modications to

the instrument. Return the instrument to your local

KYORITSU distributor for repair or re-calibration.

● Do not try to replace the batteries if the surface of the

instrument is wet.

● Insert the plug into the terminal rmly when using test leads.

● Ensure that the instrument is switched off before opening the

Battery compartment cover for battery replacement.

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#CAUTION

● Before starting a measurement, conrm that the Function

switch is at an appropriate position.

● Set the Function switch to “OFF” position after use. Remove

the batteries if the instrument is to be stored and will not be

in use for a long period.

● Do not expose the instrument to direct sunlight, high tempera-

tures and humidity or dew.

● Use a damp cloth with alcohol for cleaning the instrument

and the areas around the measuring terminals.

● When this instrument is wet, please store it after it dries.

Symbols

Danger of possible electric shock

Instrument with double or reinforced insulation

#User must refer to the manual

DC

AC

Earth terminal

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.

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○ Measurement categories (Over-voltage categories)

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

overcurrent protection device (distribution panel).

O: Device which is

not directly

connected to the

mains power supply

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2. Features

KEW3121B (2500V/100GΩ) and KEW3122B (5000V/200GΩ)

are battery-operated high voltage insulation testers.

● Designed to meet the following safety standards:

IEC 61010-1,-2-030 (CAT III 600V/CAT IV 300V Pollution

degree 2)

IEC 61010-031 (Requirements for hand-held probes)

● Suited for heavy duty electrical maintenance and servicing

ondustrial installations, cables, transformers, generators and

switchgear where high voltage insulation tests are required.

● Dual scales for low an d high ranges which change automatically.

Colour coded scales for easy reading plus LED's that illuminate

in matching colour.

● Hard carrying case furnished as standard accessory. Houses

both instrument and test leads in compact form. Made of

plastic, it is highly water resistant.

● Rated output voltage is maintained down to 0.1GΩ for

KEW3121B, 0.2GΩ for KEW 3122B. This permits accurate

measurements of low insulation resistance.

●

Audible high voltage warning at insulation resistance measurement

● Optional adapter MODEL8324 is available for connection to

recorder and enables cable insulation monitoring.(Option)

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3. Specification

● Applicable standards

IEC 61010-1,-2-030

Measurement CAT III 600V Pollution degree2

Measurement CAT IV 300V Pollution degree2

IEC 61010-031 Standard for hand-held probes

MODEL7165A(CAT IV 600V)

MODEL7264(CAT IV 600V)

MODEL7265(CAT IV 600V)

* When KEW3121B/3122B and the test lead

are combined and used together, whichever

is lower category either of them belongs to is

applied.

IEC 61326-1,-2-2 EMC standard

IEC 60529 IP40

EN 50581 RoHS Directive

● Measuring range and accuracy

Model KEW3121B KEW3122B

Rated voltage 2500V 5000V

Measuring range 0 - 2GΩ/ 1 - 100GΩ

(Automatic change) 0 - 5GΩ/ 2 - 200GΩ

(Automatic change)

Temperature:

23ºC±5ºC

First effective

measuring range

0.1 - 50GΩ 0.2 - 100GΩ

Accuracy ±5% of indicated value

Second effective

measuring range

Measuring ranges other than listed above , 0 and ∞

Accuracy

±10% of indicated value or 0.5% of scale length

Temperature:

-10ºC to +40ºC

First effective

measuring range

0.1 - 50GΩ 0.2 - 100GΩ

Accuracy ±10% of indicated value

Second effective

measuring range

Measuring ranges other than listed above , 0 and ∞

Accuracy ±20% of indicated value or 1.0% of scale length

Output voltage DC 2500V±5%

(0.1 - 50GΩ) DC 5000V±5%

(0.2 - 100GΩ)

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●Altitude : 2000m or less

●Temperature & humidity range(guaranteed accuracy)

23ºC±5ºC/Relative humidity 85% or less (no condensation)

●Operating temperature & humidity range

-10ºC to +40ºC/Relative humidity 85% or less (no condensation)

●Storage temperature & humidity range

-20ºC to +60ºC/Relative humidity 75% or less (no condensation)

●Overload protection :

Insulation resistance range: AC720V/10sec.

●Withstand voltage : AC5160V(50/60Hz)/ 5 sec.

(Between electrical circuit and enclosure)

●Insulation resistance : 1000MΩ or more/DC1000V

(Between electrical circuit and enclosure)

●Dimension : 177(L)×226(W)×100(D)mm

●Weight :

KEW3121B approx. 1.6kg (battery included)

KEW3122B approx. 1.7kg(battery included)

●Power source :

DC12V LR14(Alkaline battery size C)x 8pcs

●

Current consumption (representative values at supply voltage 12V)

Model KEW3121B KEW3122B

Rated voltage 2500V 5000V

Short-circuit current 65mA 82mA

Max. current

consumption

80mA

/50MΩ

100mA

/100MΩ

Output at

open circuit 70mA 85mA

●Measurement time : 3121B:approx. 55 hours

* under a load of 50MΩ on the Insulation

resistance 2500V range.

3122B:approx. 40hours

* under a load of 100MΩ on the Insulation

resistance 5000V range.

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●Accessories : Line probe: MODEL 7165A

(Including MODEL8255 Straight type prod

with molded parts)

Earth cord: MODEL 7264

Guard cord: MODEL 7265

LR14(Alkaline battery size C)x 8pcs

Instruction manual

Hard Case: MODEL 9179

Pickel Type Prod: MODEL 8019

Straight Type Prod: MODEL 8254

●Optional : Adaptor for recorder:MODEL8324

accessories 3m Line probe with alligator clip: MODEL7168A

15m Line probe with alligator clip: MODEL7253

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