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Kyoritsu Electrical Instruments Works KEW 3126, Instruction Manual

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Kyoritsu Electrical Instruments Works KEW 3126 Instruction Manual Download Page 11

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  4. Instrument layout

4-1 Instrument layout

1    LCD display
2    Range switch
3    Test button
4    Back Light button
5    FILTER button
6    DAR/ PI DISP button 
7    Line Terminal
8    Earth Terminal
9    Guard Terminal
10  Line Probe (red) 
11  Earth Cord (black)
12  Guard Cord (green)

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Summary of Contents for KEW 3126

Page 1: ...INSTRUCTION MANUAL 4 range High voltage insulation resistance tester KEW 3126 ...

Page 2: ...k Voltage measurement 12 6 2 Insulation resistance measurement 13 6 3 Continuous measurement 16 6 4 DAR PI measurement function 17 6 5 Voltage characteristics of measuring terminal 21 6 6 Use of Guard terminal 21 6 7 Filter function 22 6 8 Backlight function 22 6 9 Auto power off function 22 7 Battery replacement 23 8 Accessories 8 1 Metal part for Line Probe and replacement 24 8 2 How to use the ...

Page 3: ...ck reference whenever necessary The instrument is to be used only in its intended applications Understand and follow all 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 mus...

Page 4: ...making a measurement Do not touch the circuit under test while measuring insulation resistance or right after a measurement You may get an electric shock by a test voltage WARNING Never attempt to make any measurement if any abnormal conditions are noted such as broken case and exposed metal parts or when inner jackets are seen through the nicked outer jacket Do not rotate the Range switch with th...

Page 5: ...a cloth dipped in alcohol for cleaning the test leads and the part around the measuring terminals Do not store the instrument if it is wet The Voltage warning mark is being displayed during a measure ment and it flashes when voltages 30V DC AC or more exist on the circuit under test Symbols Danger of possible electric shock Instrument with double or reinforced insulation DC AC Earth terminal Cross...

Page 6: ...vironments can endure greater momentary energy than one designed for CATII CAT I Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device CAT II Primary 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 f...

Page 7: ...ed on the voltage monitor Backlight function to facilitate working at dimly illuminated location or at nighttime work Bar graph to display measured result LIVE circuit warning symbols plus audible warning With Auto power off function To prevent the instrument being left powered on and conserve battery power the instrument automatically turns off approx 10 min after the last switch operation Auto m...

Page 8: ...tester Rated voltage 500V 1000V 2500V 5000V Measuring Range 0 0 99 9MΩ 100 999MΩ 0 0 99 9MΩ 100 999MΩ 1 00 1 99GΩ 0 0 99 9MΩ 100 999MΩ 1 00 9 99GΩ 10 0 99 9GΩ 0 0 99 9MΩ 100 999MΩ 1 00 9 99GΩ 10 0 99 9GΩ 100 1000GΩ Open circuit Voltage DC 500V 30 0 DC 1000V 20 0 DC 2500V 20 0 DC 5000V 20 0 Rated Current 1mA or more 1 2mA or less at 0 5MΩ load 1mA or more 1 2mA or less at 1MΩ load 1mA or more 1 2mA...

Page 9: ...r graph Max 36 points DAR PI value 9 99 Time 60 00 Low battery warning Battery mark display in 4 levels Overrange indication OL mark appears at insulation resistance range and Hi mark at voltage range Auto ranging Range shifts to upper range 1000 counts Range shifts to lower range 80 counts Only at the insulation resistance range Auto power off Power off function operates in 10 min after the last ...

Page 10: ...a test is started 850mA after that 150mA 110mA at voltage measurement When rated measuring current is outputted 450mA 0 5MΩ 500mA 1MΩ 600mA 2 5MΩ 850mA 5MΩ Output at open circuit 45mA 50mA 70mA 110mA On stand by 25mA 110mA When backlight is on Increased by 30mA Note Current values in above table are all approximate values Operating time approx 10 hours continuous under a load of 100MΩ at 5000V Ins...

Page 11: ...ayout 1 LCD display 2 Range switch 3 Test button 4 Back Light button 5 FILTER button 6 DAR PI DISP button 7 Line Terminal 8 Earth Terminal 9 Guard Terminal 10 Line Probe red 11 Earth Cord black 12 Guard Cord green 1 4 5 3 2 6 9 7 12 11 10 8 ...

Page 12: ...ation resistance 2 Bar graph 3 Voltage 4 Battery mark 5 Voltage warning mark 6 Time 7 DAR mark 8 PI mark 9 DAR PI value 10 Filter mark 11 DC 12 AC 13 Minus sign 14 Unit 15 Overheat warning mark 5 2 3 15 1 9 14 4 12 11 13 10 6 7 8 ...

Page 13: ...wer limit of the operating voltage In such a condition the accuracy isn t guaranteed Look up Chapter 7 Battery Replacement in this manual which describes how to replace the batteries 5 2 Connecting test leads Insert the test lead firmly to the connector terminal on the instrument Connect the Line Probe red to the Line terminal the Earth Cord black to the Earth terminal and the Guard Cord green to ...

Page 14: ...urement It may cause personal injury Do not start a measurement with the battery cover removed Connect the Earth cord black to the Earth terminal of the circuit under test Voltage can be measured by setting the Range switch on this instrument to VAC DC position No need to press the Test button KEW3126 has an AC DC auto detect circuit and can measure DC voltage as well At DC voltage measurement whe...

Page 15: ...est button is pressed down if the measuring voltage is 160V or higher it starts a test if the measuring voltage is under 160V upon a press of the Test button Prior to testing ensure that the equipment under test is disconnected from the mains supply and not energized in order to avoid possible electrical hazards This instrument may start a measurement for energized electrical circuits Be extremely...

Page 16: ...t Then press the Test button The buzzer sounds intermittently during measurement when a range other than 500V is selected 4 The measured value will be displayed on the LCD and it remains displayed on the LCD after a measurement CAUTION Turn off the breaker of the circuit under test 5 This instrument has Auto discharge function Keep the test leads connected to the circuit under test and release the...

Page 17: ... blinks when voltages of AC DC 30V or higher exist on the circuit under test When measuring low resistances if currents larger than the rated current are output over a long period of time KEW3126 consumes large power and will overheat When this happens further tests are automatically inhibited and the over temperature symbol appears on the display The instrument must then be left cool down Testing...

Page 18: ...age Current RX V I 6 3 Continuous measurement Press down and turn the Test button clockwise to lock it to perform a continuous measurement of insulation resistance After testing turn the button counterclockwise and set it to the initial position DANGER Be extremely careful not to get electric shock as high voltage is present on the tip of test leads continuously LINE EARTH RESISTANCE VALUE RX CURR...

Page 19: ...tart of test PI PI 4 or more 4 2 2 0 1 0 1 0 or less Criteria Best Good Warning Bad 2 DAR Dielectric Absorption Ratio DAR measurement is almost same to PI measurement in a sense that they test the time course of insulation The only difference is that DAR measurement can get result faster than the other Insulation resistance 1 min after a start of test Insulation resistance 15 or 30 sec min after a...

Page 20: ...y 1 min after a start of continuous measurement LCD shows DAR value 10 min after a start of continuous measurement LCD shows PI value When DAR PI values are displayed as no DAR and PI values are determined by the methods 1 and 2 as described above therefore they are displayed as no when the measured insulation resistances fall under any of following cases 1 measured value is 0 0MΩ 2 measured value...

Page 21: ...R PI values as shown below during measurements 1 Start of test 2 1 min after the start of test 3 10 min after the start of test No DAR PI value is displayed DAR value is displayed PI value is displayed Press the DISP button to switch DAR and PI values ...

Page 22: ...e C DAR or PI value whichever was displayed at the end of test 2 Results at 15 or 30 sec after a start of test A Elapsed time 15 or 30 sec B Value measured 15 sec after a start of test resistance value output voltage C DAR value 3 Results at 1 min after a start of test A Elapsed time 1 min B Value measured 1 min after a start of test resistance value output voltage C DAR value 4 Results at 10 min ...

Page 23: ...on resistance value In order to prevent such error wind a conductive wire around the point where leakage current flows Then connect it to the Guard terminal as shown in the figure on the next page This is to move out the surface leakage resistance of the cable insulation to measure only the volume resistance of insulator Make sure to use the Guard cord supplied with this instrument to connect the ...

Page 24: ...ction This function to facilitate working at dimly illuminated location or at nighttime work The backlight doesn t work when the Range switch is set to OFF It automatically turns off 2 min after the last key operation this feature is disabled while a measurement is processed 6 9 Auto power off function The instrument automatically turns off approx 10 min after the last switch operation To restore ...

Page 25: ...as marked inside After replacing batteries confirm that the batteries are properly installed in the compartment and well contacted with each battery contact spring Improperly installed batteries may cause a battery liquid leak 1 Set the Range switch to OFF position and remove the test leads from the instrument 2 Loosen the battery compartment cover fixing screws and remove the battery compartment ...

Page 26: ...quipment under test and cause fire or lead to fatal or serious injury 1 Tip metal parts MODEL8252 Standard Prod straight type with molded parts MODEL8254 Straight Type Prod MODEL8019 Pickel Type Prod To be used to hook the instrument 2 How to replace it Turn the Line probe counterclockwise to remove the attached tip metal Put the tip metal you want to use to the hexagon socket and turn it to clock...

Page 27: ... for output current measurement Connect it as shown in the below figure Output is DC1mA when current of 1μA is flowing MODEL8302 can measure currents up to 2mA 8 3 Line probe with alligator clip MODEL7168 Line probe with alligator clip optional accessory To recorder To shield or Earth LINE ...

Page 28: ...10 04 92 2028 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations ...

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