KYORITSU 3021A Manuale utente

Instruction manual

INSULATION - CONTINUITY TESTER

KEW 3021A・3022A・3023A

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　Contents

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

2．Features ……………………………………………………………４

3．Specification ………………………………………………………５

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

5．Preparation for measurement ……………………………………10

5−1 Test lead connection………………………………………10

5−2 Checks on Test lead and Fuse …………………………10

6．Measurement ……………………………………………………11

6−1 Voltage measurement(Mains disconnection check) …11

6−2 Insulation resistance measurement ……………………11

6−3 Continuous measurement ………………………………14

6−4 Output voltage characteristics……………………………14

6−5 Measurement of resistance (Continuity check) ………15

6−6 Backlight function …………………………………………16

6−7 Auto-power-off ……………………………………………16

7. Functions keys ……………………………………………………17

7−1 Comparator function ………………………………………17

7−2 Memory (save) function …………………………………17

8．Fuse & Battery replacement ……………………………………18

8−1 Battery replacement ………………………………………18

8−2 Fuse replacement …………………………………………19

9．Notes on Housing case and accessories ………………………19

9−1 Case lid ……………………………………………………19

9−2 Neck strap and Cord case ……………………………20

9−3 Test prods and replacement …………………………20

9−4 Adaptors for the Earth cord and replacement …………20

10．Cleaning of the instrument ……………………………………21

11．Servicing …………………………………………………………21

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　１．Safety warnings

○

This instrument has been designed, manufactured and tested

according to IEC 61010-1: Safety requirements for Electronic

Measuring apparatus, and delivered in the best condition after passed

the inspection. This instruction manual contains warnings and safety

rules which must be observed by the user to ensure safe operation of

the instrument and retain 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 using the instrument.



Save and keep the manual handy 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.



Failure to follow the instructions may cause injury, instrument

damage and/or damage to equipment under test. Kyoritsu is by no

means liable for any damage resulting from the instrument in

contradiction to this cautionary note.

○

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：is 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.

DANGER

Never make measurement on a circuit in which the electrical

potential exceeds AC/DC600V(Measurement CAT III 600V).

Do not attempt to make measurement in the presence of flammable

gasses. Otherwise, the use of the instrument may cause sparking,

which can lead to an explosion.



Never attempt to use the instrument if it

s surface or your hand are 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 range.

Never open the Battery cover during a measurement.

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The instrument should be used only in its intended applications or

conditions. Otherwise, safety functions equipped with the instrument

do not work, and instrument damage or serious personal injury may

be caused.

Verify proper operation on a known source before use or taking

action as a result indication of the instrument.

Keep your fingers and hands behind the protective fingerguard

during measurement.

WARNING



Never attempt to make any measurement if any abnormal

conditions, such as a broken case or exposed metal parts are

present on the instrument and test leads.



Never press the Test button when connecting the test leads to the

instrument.



Never rotate the Range selector switch with the test leads

connected to the equipment under test.



Do not install substitute parts or make any modification to the

instrument. Return the instrument to your local KYORITSU

distributor for repair or re-calibration in case of suspected faulty

operation.



Never touch the circuit under test during/immediately after the

insulation resistance measurement. The test voltage may cause

electrical shock.



Do not replace batteries if the instrument is wet.



Ensure that the test leads are firmly inserted into the terminal.



Set the Range selector switch to OFF position when opening the

Battery cover for battery replacement.



Stop using the test lead if the outer jacket is damaged and the inner

metal or color jacket is exposed.

CAUTION



Always set the Range selector switch to the appropriate position

before making measurement.



Set the Range selector switch to "OFF" position after use and

remove the test leads. The instrument consume small current at

any range other than OFF, and it shortens the battery life.

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, humidity or dew.



Use a damp cloth with neutral detergent for cleaning the

instrument. Do not use abrasives or solvents.



Do not store the instrument if it is wet. Store it after it dries.

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Symbols

Danger of possible electric shock

Instrument with double or reinforced insulation

〜AC

Earth terminal

#Refer to the instructions in the manual to protect the user and

instrument.

This instrument satisfies the marking requirement defined in the

WEEE Directive. This symbol indicates separate collection for

electrical and electronic equipment.

Protection against wrong connection is up to 440V.

○Measurement Category

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 over-current

protection device (distribution panel).

O: Device which is

not directly

connected to the

mains power supply

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　２．Features

KEW3021A/3022A/3023A are four-range digital insulation resistance

testers for testing low-voltage installation below 600V.Resistance

measurement with audible Continuity check function is also available.



Designed to following safety standards:

IEC61010-1(CAT III 600V Pollution degree 2)

IEC61010-031 (Requirements for hand-held probes)



Small and light weight.



Auto-discharge function

When insulation resistance like a capacitive load is measured,

electric charges stored in capacitive circuits are automatically

discharged after measuring. Discharge can be checked with the

LED & mark on LCD.



Two resistance ranges: 40Ωand 400Ω(2-range auto) are also

available. Buzzer sounds when a measured current exceeds

200mA.



This instrument has 0ΩADJ. function to null the resistance of test

lead or fuse at resistance measurement.



Measured value is held for about 5 sec. after insulation/ resistance

measurement of the Test button is released.



Backlight function to facilitate work at night or dimly lit locations.



Bar-graph to indicate measured results



Max. 99 data can be saved to the internal memory at the insulation

resistance range.



Visible and audible warning ( or is indicated and buzzer

sounds) when the measured insulation resistance exceeds the pre-

set value.



Live circuit warning indication, LED and buzzer.



The Safety key must be kept pressed down to select 500V or 1000V

range. Otherwise, neither 500V or 1000V range can be selected.



Auto-power off function

To prevent the instrument being left powered on and conserve

battery power, the instrument automatically turns off approx. 15

min. after the last switch operation.



The mark flickers when the battery voltage drops to the lower

limit.



Test leads with remote control switch (voltage won't be outputted

when the test lead is not connected.)



Robust housing case



Neck strap for both hand's operation



User-changeable test prod

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　３．Specification



Applicable standards

IEC 61557-1,2,4

IEC 61010-1, -2-030 Masurement CAT III 600V Pollution degree2

(Location for use: altitude 2000m or less, indoor use)

IEC 61010-031

IEC 60529 IP40

EN 61326-1 (EMC)

EN 50581 (RoHS)



Measuring range and accuracy

KEW3021A

Nominal voltage 1000V 500V 250V 125V

Auto Range 0〜4/40/400/2000MΩ

0〜4/40/200MΩ

Open circuit

voltage Nominal test voltage 100%~120%

Short circuit

current Within 1.5mA

Nominal test

current 1MΩ0.5MΩ0.25MΩ0.125MΩ

1mA 0%〜＋20%

1st effective

measurement

range 0.200〜

1000MΩ0.200〜

200.0MΩ0.200〜

40.00MΩ0.200〜

20.00MΩ

Center scale

range 50MΩ50MΩ5MΩ5MΩ

Accuracy ±(2%rdg＋6dgt)

2nd effective

measurement

range

0.110〜0.199MΩ

1001〜

2000MΩ200.1〜

2000MΩ40.01〜

2000MΩ20.01〜

200.0MΩ

Accuracy ±(5%rdg＋6dgt)

Accuracy at 0 Within 6dgt

KEW3022A

Nominal voltage 500V 250V 100V 50V

Auto Range 0〜4/40/400/2000MΩ0〜4/40/200MΩ

Open circuit

voltage Nominal test voltage 100%~120%

Short circuit

current Within 1.5mA

Nominal test

current 0.5MΩ0.25MΩ0.1MΩ0.05MΩ

1mA 0%〜＋20%

1st effective

measurement

range 0.200〜

200.0MΩ0.200〜

40.00MΩ0.200〜

20.00MΩ0.200〜

20.00MΩ

Center scale

range 50MΩ5MΩ5MΩ5MΩ

Accuracy ±(2%rdg＋6dgt)

2nd effective

measurement

range

0.110〜0.199MΩ

200.1〜

2000MΩ40.01〜

2000MΩ20.01〜

200.0MΩ20.01〜

200.0MΩ

Accuracy ±(5%rdg＋6dgt)

Accuracy at 0 Within 6dgt

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Operating uncertainty (B) is an error obtained under the nominal

operating conditions, and calculated with the intrinsic error (A),

which is an error of the instrument used, and the error (En) due to

variations. According to IEC61557, the maximum operating error

should be within +/-30%.

Ｂ＝︱Ａ︱＋ 1.15 ×√

（Ｅ12＋Ｅ22＋Ｅ32）

Ａ：Intrinsic error（％）

Ｂ：Operating uncertainty（％）

Ｅ1：Variation due to changing the position（％）

Ｅ2：Variation due to changing the Supply voltage（％）

Ｅ3：Variation due to changing the temperature（％）

Nominal operating conditions

Ambient temperature : 0〜40℃

Relative humidity : 90% or less

Position : Horizontal〜±90゜

Battery voltage : within the battery effective range

KEW3023A

Nominal voltage 1000V 500V 250V 100V

Auto Range 0〜4/40/400/2000MΩ

0〜4/40/200MΩ

Open circuit

voltage Nominal test voltage 100%~120%

Short circuit

current Within 1.5mA

Nominal test

current 1MΩ0.5MΩ0.25MΩ0.1MΩ

1mA 0%〜＋20%

1st effective

measurement

range 0.200〜

1000MΩ0.200〜

200.0MΩ0.200〜

40.00MΩ0.200〜

20.00MΩ

Center scale

range 50MΩ50MΩ5MΩ5MΩ

Accuracy ±(2%rdg＋6dgt)

2nd effective

measurement

range

0.110〜0.199MΩ

1001〜

2000MΩ200.1〜

2000MΩ40.01〜

2000MΩ20.01〜

200.0MΩ

Accuracy ±(5%rdg＋6dgt)

Accuracy at 0 Within 6dgt

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Auto-range 0〜40.00/ 400.0Ω

Open-circuit voltage(DC) 5V±20%

Short-circuit current DC200mA or more

Measuring range to keep

operating error/ tolerance 0.2〜400Ω/ ±(2%rdg + 8dgt)

Outside of the measuring range to

keep operating error/ tolerance 0〜0.19/Ω0.1Ω

Measured voltage 20 〜600V

Accuracy ±(3%rdg+6dgt)

Accuracy at 0 Within 6dgt

Possible number of measurement within the "BATTERY.GOOD" range.

(Measure 5 sec., and take pause for 25 sec.)

Range Resistor for test Possible number of

measurement

50V 0.05MΩat least 1300 times

100V 0.

MΩat least 1300 times

125V 0.

125

MΩat least 1200 times

250V 0.

MΩat least 1000 times

500V 0.

MΩat least 1000 times

1000V

MΩat least 400 times

Continuity

Ωat least 1300 times

Temperature & : 0℃〜 40℃(RH: 90% or less)

humidity range (no condensation)

Storage temperature : -20℃〜 60℃(RH: 75% or less)

& humidity range (no condensation)

Location for use : Altitude 2000m or less, Indoor use

Response time : Indicated value at each insulation resistance

range comes within accuracy within approx. 1

sec. after a resistance corresponding to the

mid-value and 0

is suddenly applied across

the measuring terminals. (It may take

time

when measuring a capacitive load.)

Withstand voltage : AC5,160V(50/60Hz) for 5s. between the

electrical circuit and the enclosure．

Overload protection : The instrument operates properly after each of

the voltage shown in the table below is

applied.

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MODEL KEW3021A / 3023A KEW3022A

Continuity range

AC 440V / 1min. AC 440V / 1min.

Insulation

resistance All ranges:AC1200V / 10sec. All ranges :

AC600V / 10sec.

AC voltage AC720V / 10sec. AC720V / 10sec.

Auto-ranging:

Range shifts to upper range: when a reading go over 4200

Range shifts to lower range : when a reading go to less than 320

Dimension : approx. 105(L)×158(W)×70(D)mm

Weight : approx. 600g (including batteries)

Power source : R6P or LR6 sizeAA x 6pcs

Nominal power : 2.7VA

Accessories

MODEL7103ATest lead with remote control switch 1 set

MODEL7161A test bar 1 pce

MODEL7131B Safety alligator clip 1 pce

MODEL8017 Extension prod 1 pce

Neck strap 1 pce

Cord case 1 pce

R6P (SUM-3), sizeAA 6 pcs

Instruction manual 1 pce

Optional

MODEL7115 Extension probe

MODEL8016 Pickle type prod

When the instrument and the test lead are combined and used together,

whichever lower category either of them belongs to will be applied.

Pickle type prod

Extension probe Fig. 1

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