KYORITSU KEW 3021A Instruction Manual Download Page 7

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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

〜

4/40/400/2000M

〜

4/40/200M

Open circuit
voltage

Nominal test voltage 100%~120%

Short circuit
current

Within 1.5mA

Nominal test
current

0.5M

0.25M

0.125M

1mA 0%

〜＋

20%

effective

measurement
range

0.200

〜

1000M

0.200

〜

200.0M

0.200

〜

40.00M

0.200

〜

20.00M

Center scale
range

50M

Accuracy

(2%rdg

＋

6dgt)

effective

measurement
range

0.110

〜

0.199M

1001

〜

2000M

200.1

〜

2000M

40.01

〜

2000M

20.01

〜

200.0M

Accuracy

(5%rdg

＋

6dgt)

Accuracy at 0

Within 6dgt

KEW3022A

Nominal voltage

500V

250V

100V

50V

Auto Range

〜

4/40/400/2000M

〜

4/40/200M

Open circuit
voltage

Nominal test voltage 100%~120%

Short circuit
current

Within 1.5mA

Nominal test
current

0.5M

0.25M

0.1M

0.05M

1mA 0%

〜＋

20%

effective

measurement
range

0.200

〜

200.0M

0.200

〜

40.00M

0.200

〜

20.00M

0.200

〜

20.00M

Center scale
range

50M

Accuracy

(2%rdg

＋

6dgt)

effective

measurement
range

0.110

〜

0.199M

200.1

〜

2000M

40.01

〜

2000M

20.01

〜

200.0M

20.01

〜

200.0M

Accuracy

(5%rdg

＋

6dgt)

Accuracy at 0

Within 6dgt

www.

GlobalTestSupply

.com

Find Quality Products Online at:

[email protected]

Summary of Contents for KEW 3021A

Page 1: ...Instruction manual INSULATION CONTINUITY TESTER KEW 3021A 3022A 3023A KYORITSU ELECTRICAL INSTRUMENTS WORKS LTD www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 2: ... 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 E...

Page 3: ...his 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 caus...

Page 4: ...he 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...

Page 5: ...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 co...

Page 6: ...lation 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 warnin...

Page 7: ...enter scale range 50MΩ 50MΩ 5MΩ 5MΩ Accuracy 2 rdg 6dgt 2nd effective measurement range 0 110 0 199MΩ 1001 2000MΩ 200 1 2000MΩ 40 01 2000MΩ 20 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 2000MΩ 0 4 40 200MΩ Open circuit voltage Nominal test voltage 100 120 Short circuit current Within 1 5mA Nominal test current 0 5MΩ 0 ...

Page 8: ...s 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 1MΩ 0 5MΩ 0 25MΩ 0 1MΩ 1mA 0 20 1st effective measurement range 0 200 1000MΩ...

Page 9: ...mes 250V 0 25MΩ at least 1000 times 500V 0 5MΩ at least 1000 times 1000V 1MΩ at least 400 times Continuity 1Ω at 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 Response time Indicated value at each insulation resistance range comes within accuracy within approx 1 sec after a resistance correspond...

Page 10: ...P or LR6 size AA x 6pcs Nominal power 2 7VA Accessories MODEL7103A Test 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 size AA 6 pcs Instruction manual 1 pce Optional MODEL7115 Extension probe MODEL8016 Pickle type prod When the instrument and the test lead are combined...

Page 11: ...emote control switch Standard prod MODEL8072 Earth code Probe connector Test bar MODEL7161A Safety alligator clip MODEL7131B Extension prod MODEL8017 Protective fingeguad Fig 2 Instrument layout KEW3021A Protective figerguard It is a part providing protection against electrical shock and ensuring the minimum required air and creepage distances www GlobalTestSupply com Find Quality Products Online ...

Page 12: ...strument to your local KYORITSU distributor for repair DANGER When the Test button or the Remote control switch is pressed while the Range selector switch set to an insulation resistance range take care not to touch the tip of the Test probe where a high voltage is present in order to avoid possible shock hazard Test lead and fuse must be inspected prior to measurement according to Clause 5 2 indi...

Page 13: ...age cannot be measured if a break is present on the fuse Never make measurement on a circuit in which the electrical potential exceeds AC DC600V in order to avoid possible shock hazard Refer to 3 Specification AC voltage measurement When testing installation that has a large current capacity such as a power line be sure to make measurement on the secondary side of a circuit breaker in order to avo...

Page 14: ... switch is pressed with the Range selector switch set to an insulation resistance range position take care not to touch the tip of the test probe or the circuit under test where a high voltage is present in order to avoid possible shock hazard Do not make measurement with the Battery cover removed CAUTION Ensure that the circuit under test is de energized prior to any insulation testing 1 Check th...

Page 15: ...te control switch off with the test lead connected Discharge can be monitored by the LIVE LED and mark 2 Connect the Earth probe to the earth terminal of the circuit under test If the circuit is not earthed connect the Earth probe to any appropriate conductor 3 Connect the Line probe to the circuit under test and press the Test button or Remote control switch 4 Take the reading on the LCD Principl...

Page 16: ...ng position the button is released by turning it counterclockwise DANGER While the Test button is locked down a high voltage is present at the tip of a probe Attention should be paid to avoid possible shock hazard 6 4 Output voltage characteristics This instrument conforms to IEC61557 This standard defines that the nominal current shall be at least 1mA and the lower limit of the insulation resista...

Page 17: ...quipment under test only Setting 1 Set the Range selector switch to theΩ Continuity position 2 Short the test leads LINE red and EARTH black 3 Press the Zero Ω ADJ key with the Test button locked or with the Remote control switch pressed Then mark is lit up and a value of 0 00 Ω is displayed on the LCD This value is saved in the memory of the instrument and won t be cleared after turning off the i...

Page 18: ... connection of LINE red and EARTH black when measuring the voltage with the switched polarities The measurement result at the resistance function may be effected by the impedance or transient current in the operating circuit which is connected in parallel to the instrument 6 6 Backlight function To facilitate working in dimly lit situations a backlight function is provided which illuminates the di...

Page 19: ...lue Select to sound the when the measured value is under the pre set value 3 The number displayed at the lower left on the LCD starts flickering Press the UP or DOWN key to select the reference value and press the key 4 The message and the set value are displayed on the LCD once the setting completes 5 Press the key to release this function Setting for Any 1 The decimal point displayed at the lowe...

Page 20: ...gain The deletion is completed once Ω is displayed on the LCD Note The mark is displayed on the LCD when no data is saved with the selected memory No Resistance value is displayed on the LCD when data is saved with the selected memory No Old data is overwritten with new when a new data is saved with the same memory No 8 Fuse Battery replacement DANGER Never open the Battery cover during a measurem...

Page 21: ...eplace the fuse Fuse type 500mA 600V F quick acting ceramic fuse 6 35 x 32mm 3 Screw the battery compartment lid back on before using the instrument 9 Notes on Housing case and accessories 9 1 Case lid Case lid can be fit under the Housing case while making measurement 1 Unhook and open the Case lid 2 Turn it 180 degrees Put the Case lid under the Housing case 3 Hook it on to the Housing case Fig ...

Page 22: ...a conductor 2 How to replace Test prod To remove the Test prod turn the cap of LINE probe counterclockwise Insert the threaded end of another prod into the hexagonal hole on the probe cap as shown Then turn the probe cap clockwise to secure it on the body of the probe 9 4 Adaptors for the Earth cord and replacement 1 Adaptors MODEL7131B Safety alligator clip Connected to the Earth terminal of the ...

Page 23: ...er and dry the instrument completely after cleaning CAUTION Never use any solvent which may transmute plastics for example organic solvent such as benzene acetone etc 11 Servicing If this tester should fail to operate correctly return it to your nearest distributors stating the exact nature of the fault Before returning the instrument make sure that a Operating instructions have been followed b Te...

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