IM 2406E-E
Contents
1. User s Manual 2406E Series Insulation Tester Thank you for purchasing the YOKOGAWA 2406E Insulation Tester To optimize all the functions of the instrument please read this manual thoroughly before operating it Model 240631 240633 240635 2406 41 240643 240645 2406 32 2406 34 2406 42 2406 44 6th Edition Jun 2006 KP All Rights Reserved Copyright 1996 Yokogawa M amp C Corporation A3 YOKOGAWA Yokogawa Meters amp Instruments Corporation IM 2406E E 7th Edition July 2007 1 Regarding Safe Use of This Product E For the safe use of this product the following safety symbols are used on the product concerned Danger Handle with Care A This symbol indicates that the operator must refer to an explanation in the user s manual in order to avoid risk of injury or death of personnel or damage to the instrument High voltage Terminal A N This symbol indicates a dangerous level of voltage terminals fed from the interior by voltages exceeding 1000 volts must be so marked Never touch the terminal AC Voltage This symbol indicates that an AC voltage is present This indicates on the product that the operator must refer to an explanation in the user s manual in order to avoid the risk of serious injury or death of personnel The manual describes how the operator should exercise special care to avoid electric shock or other dangers that may result in serious injury or the loss of life This indicates on the2. 0 5MQ 0 02 10MQ 10MQ exclusive 20MQ 0 125MQ mA 0 300 V 240642 250 V SOMQ IMQ 0 05 20MQ 20MQ exclusive 50MQ 0 25MQ 1 mA 240633 125 V 20MQ 0 5MQ 0 02 10MQ 10MQ exclusive 20MQ 0 125MQ 1 mA 0 600 V 240643 250 V SOMQ IMQ 0 05 20MQ 20MQ exclusive 50MQ 0 25MQ mA 500 V IOOMQ 2MQ 0 1 50MQ 50MQ exclusive 100MQ 0 5MQ 1 mA 240634 250 V SOMQ IMQ 0 05 20MQ 20MQ exclusive 50MQ 0 25MQ 1 mA 0 600 V 240644 500 V IOOMQ 2MQ 0 1 50MQ 50MQ exclusive 100MQ 0 5MQ mA 1000 V 2000MQ 50MQ 2 1000MQ 1000MQ exclusive 2000MQ IMQ 1 mA 240635 250 V SOOMQ 10MQ 0 5 200MQ 200MQ exclusive 500MQ 0 25MQ 1 mA 0 600 V 240645 500 V 1000MQ 20MQ 1 500MQ 500MQ exclusive 1000MQ 0 5MQ 1 mA 1000 V 2000M2 50MQ 2 1000MQ 1000MQ exclusive 2000MQ IMQ 1 mA Kk denotes models with a scale plate lamp denotes a value that allows the rated voltage to be maintained during testing indicates that the value becomes 0 55 mA at the lower limit of the primary effective range of measurement Standard test conditions Ambient temperature and humidity Attitude Influence of earth magnetism Battery Voltage 23 5 C at 45 to 75 RH Horizontal within 5 degrees from horizontal Earth magnetic field Within effective range for the battery When the battery is checked the pointer must be within the B mark Tolerances under the above conditions Resistance measurement Infinity and zero indications AC voltage No load voltage Rated measuring
3. accessory could affect the safety and EMC performance of the product and such item should be used with this consideration Lead for guard terminal 321803 e Interconnection with other apparatus is not recommended Supplied Accessories the items labeled to are spare parts e Avoid storing the tester in a location where there is moisture e exposure to direct sunlight e a high temperature heat source nearby e exposure to severe mechanical vibrations e a large amount of dust and or salt or e a corrosive gas E Removal of Dirt Do not use volatile solvents such as paint thinners or benzine as they are likely to cause discoloration Wipe off dirt with a cloth dampened water or alcohol E Calibration Cycle It is recommended that the tester be calibrated once every year for correct operation ask Yokogawa Meters amp Instruments to do the periodic calibration for you 9 Specifications Insulation Resistance Standard Test Conditions Ambient Temperature 23 5 C Relative Humidity 45 75 Model Rating Central scale First effective Second effective measuring Low limit measuring Rated current AC Voltage mark measuring range range resistance measuring range 240631 25 V SMQ 0 1MQ 0 005 2MQ 2MQ exclusive 5MQ 0 025MQ 1 mA 0 300 V 240641 50 V 1IOMQ 0 2MQ 0 01 5MQ 5MQ exclusive 10MQ 0 05MQ mA 125 V 20MQ 0 5MQ 0 02 10MQ 10MQ exclusive 20MQ 0 125MQ 1 mA 240632 125 V 20MQ
4. current Short circuit current Scale length Response time Friction Effects of tilting Effect of temperature Effect of humidity Effect of external magnetic field 5 of reading within the first effective measuring range 10 of reading within the second effective measuring range Up to 0 7 of scale length 10 of the maximum value Within 130 of the rated voltage 1 mA for the first effective measuring range 0 to 20 12 mA or less Approx 86 mm 3 sec or less untill the pointer is within tolerance from the instant the resistors whose values correspond to the midpoint and zero indications are connected abruptly No friction is recognized Deviation from the infinity indication when the tester is tilted or rotated by 30 degrees from the horizontal must be 2 or less of the scale length Deviation from the midpoint indication at 20 C must be 5 or less when ambient temperature is varied from 20 C by 20 C 0 7 or less of scale length for infinity and zero indications Within tolerance when the tester is left for one hour with the humidity at 90 RH The change of indication must be 3 or less of the indicated value when an external field of DC 400A m is applied in the most affected direction Effect of AC component of voltage at measurement terminals Insulation resistance Dielectric strength Vibration proof Shock proof Durability Input mistake protection Operation temperature humidity Storage temperat
5. seconds after it has turned on 2 The batteries are still operable if the pointer is indicating anywhere within the range for a battery check B mark 3 The batteries are low if the pointer fails to stay within the range Replace the batteries by following the instructions given Battery Replacement UN Item 7 A Item 6 2 Loosen the bottom cover setscrew with a coin or the like and then slide the cover off of the main unit 3 Remove all six batteries at one time and insert new ones with their polarities set exactly as shown on the battery holder 4 After changing the batteries replace the bottom cover and tighten the setscrew 6 Battery Check 1 Turn the range selector switch off and then press the MEAS key in Section 7 below T 1 Make sure that the range selector switch is off 8 Maintenance E Storage Conditions e Temperature humidity 10 to 60 C 70 RH maximum Battery R6 AA 1 5 V 6 batteries External dimensions Approx 120 X 110 X 60mm Weight Approx 500g including batteries Safety Standard Complied Standard BS EN61010 1 BS EN61010 2 31 Insulation class II Double insulation Measurement category II Polution degree 2 EMC Standard Complied Standard EN55011 Group1 Class A EN61326 A This product is class A for use in an industrial environment and may cause radio interference if used for domestic use Therefore appropriate measures must be taken when using it for domestic use Note e The application of the following
6. MINIM itive ltem 1 Ulo Items 2 and 4 For example assume that you are doing an insulation test on a cable as shown in the figure on the right If you bring a lead optional connected to the GUARD terminal into con tact with an insulator overlapped by bare conducting wire you can measure Core wire Bare conducting wire the volumetric resistance only This is because the leakage current that Indicating meter Power supply flows along the surfaces of the insulator does not flow into the indicator A Insulator dedicated lead part number 321803 is necessary when using the GUARD terminal Main unit Metal cladding IM 2406E E lt I gt Measuring AC Voltages UN Items 2 and 6 AN Items 1 and 5 The tester can also measure commercial frequency AC voltages When measuring insulation resistance also use the tester 2 Bring the line probe into contact with the location at which the AC voltage is being measured Read the value on the voltage measurement scale AC V While you are measuring AC voltages do not press the MEAS key 4 to verify that there is no voltage present at the DUT 1 Plug the probes in the same way as when measuring insulation resistance 5 Other Functions e Lighting Up the Indicator Window models 240641 42 43 44 and 45 only Press the LIGHT key to turn on the scale plate lamp Press the key once again to turn the lamp off The lamp automatically turns off approximately 40
7. P 6 Built in AA size Earth and 98007 Line probe Line probe B9204XD Earth probe B9204XJ Hard case B9075UF including a probe case User s manual IM2406E E l Thismawa_ s manual IM2406E E 1 This manual External Dimensions 120 E Notice Regarding The Manual e The information contained in this manual is subject to change without notice e Every effort has been made to ensure that the information contained herein is accurate However should any concerns errors or omissions come to your attention or if you have any comments please contact us e The contents of this manual may not be transcribed or reproduced in part or in their entirety without prior permission IM 2406E E lt 2 gt
8. e completion of each measurement Switching between voltages immediately after the completion of measurement may result in pos sible damage to the tester or DUT due to the electrical charge at the probes or DUT Note that the tester is provided with a discharge feature 4 Power to DUTs Electrical charges may be present at metals or wiring cables attached to electrical equipment being tested Verify that the equipment is free from electrical charges before connecting the testing terminals The same rule applies to the grounding wire 5 Range Selector Switch e Do not operate the range selector switch during testing e Do not apply any voltage to the testing terminals when measuring insulation resistance 6 Batteries e Do not mix batteries of different types or new batteries with used ones If the tester will not be in service for a prolonged period always remove the batteries before you store the instrument If you store the tester with the batteries left installed they are more likely to suffer fluid leakage resulting in a malfunctioning of the instrument E Measurement Categories CAT For measurements performed on circuits not directly connected to MAINS O CAT I For measurements performed on circuits directly connected to the low voltage installation Appliances portable equipments etc om CAT I For measurements performed in the building installation Distribution board circuit breaker etc V CAT V For measurements
9. l measures are taken ask the manufacturer for repair 6 DUTs e Turn off electrical power to the DUT before you begin measuring insulation resistance Avoid touching any electrified part while using the tester around electrically live locations For safety it is recom mended that you use a pair of rubber gloves or other alternative means 7 Battery Replacement e Remove the probes from the DUT and then turn off the range selector switch before you open the casing to replace the batteries e Do not touch the MEAS key during replacement Otherwise a high voltage may be produced 8 Operating Environment e Do not operate the tester in an atmosphere where any flammable or explosive gas is present e Do not use the tester if there is condensation on it 9 Disassembly No person except service personnel from Yokogawa Meters amp Instruments is authorized to disassemble this instrument E Always observe the following instructions Failure to observe these instructions may result in electric shock hazards or other dangers that may lead to injury or damage to the instrument A Bae 1 Measurement of AC Voltages Do not apply any voltage between terminals that exceeds the specified limit GUARD Terminal The GUARD terminal is an auxiliary measurement terminal to eliminate a leakage current Do not apply any testing voltage to the terminal Ranges Do not switch between the rated voltages until two to three seconds have elapsed after th
10. performed at the source of the low voltage installation Overhead wire cable systems etc Internal Wiring ie aa CAT CAT II Entrance FW U sogr Cable T CAT IV aa i 3 Outlet Sait eee ee YOKOGAWA Yokogawa Meters amp Instruments Corporation Yokogawa Meters amp Instruments Corporation International Sales Dept Tachihi Bld No 2 6 1 3 Sakaecho Tachikawa shi Tokyo 190 8586 Japan Phone 81 42 534 1413 Facsimile 81 42 534 1426 YOKOGAWA CORPORATION OF AMERICA U S A Phone 1 770 253 7000 Facsimile 1 770 251 2088 YOKOGAWA EUROPE B V THE NETHERLANDS Phone 31 334 64 1611 Facsimile 31 334 64 1610 YOKOGAWA ENGINEERING ASIA PTE LTD SINGAPORE Phone 65 6241 9933 Facsimile 65 6241 2606 YOKOGAWA AMERICA DO SUL S A BRAZIL Phone 55 11 5681 2400 Facsimile 55 11 5681 1274 YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION KOREA Phone 82 2 551 0660 to 0664 Facsimile 82 2 551 0665 YOKOGAWA AUSTRALIA PTY LTD AUSTRALIA Phone 61 2 9805 0699 Facsimile 61 2 9888 1844 YOKOGAWA INDIA LTD INDIA Phone 91 80 4158 6000 Facsimile 91 80 2852 1441 YOKOGAWA SHANGHAI TRADING CO LTD CHINA Phone 86 21 6880 8107 Facsimile 86 21 6880 4987 YOKOGAWA MIDDLE EAST E C BAHRAIN Phone 973 358100 Facsimile 973 336100 LTD YOKOGAWA ELECTRIC RUSSIAN FEDERATION Phone 7 095 737 7868 Facsimile 7 095 737 7869 IM3E 2006 2 2 Components and Their F
11. product that the operator must refer to an explanation in the user s manual in order to avoid the risk of injury or damage to the product The manual describes how the operator should exercise special care to avoid dangers that may result in injury or damage to the instrument E Always observe the following instructions Failure to observe these instructions may result in electric shock hazards or other dangers that may lead to serious injury or the loss of life A nS 1 During Measurement of Insulation Resistance e A high voltage is present at the probes Do not touch the device under test DUT or the EARTH LINE or GUARD terminal 2 During Measurement of AC Voltages e Do not press the MEAS key while measuring AC voltages e An AC voltage is present at the GUARD terminal Do not touch the terminal 3 Immediately After Measurement of Insulation Resistance The probes or DUT may remain highly charged Do not touch them immediately after the completion of measure ment Probes Use the probes supplied with this tester by Yokogawa Meters amp Instruments Do not use probes that have deteriorated or broken Remove the probes from the DUT before attaching detaching the probes to from the tester Insulation of Casing Punctures in the protective insulation may occur if there are any cracks or other damage in the casing as a result of the instrument having been dropped or hit against other objects Do not use the instrument before any remedia
12. revent the leadwire of the line probe from coming into contact with the ground floor or other object Not observing this precaution may result in a failure to measure the correct insulation resistance Upon completion of measurement always turn the range selector switch off 4 Immediately after measurement electrical charges resulting from the applied testing voltage may be present at the probes or DUT The tester therefore is designed to automatically begin discharging electricity upon completion of measurement e Discharge Feature Any capacitive component in the DUT will be charged during measurement and thus the DUT remains electrified even after the completion of measurement resulting in a hazardous condition The tester is designed to begin discharging when the MEAS key is turned off The pointer then swings to the position on the scale proportional to the voltage that has developed across the terminals After measurement is completed leave the probes connected until the pointer swings back to the infinity sign to allow the electricity in the DUT to fully discharge Locking the MEAS Key N MEN Item 1 The MEAS key when pulled up to the right can be locked with the key left turned on Use this mechanism when making continuous measurement over a prolonged period Note however that leaving the key turned on for an unreasonably long time will accelerate the discharge of the batteries e Measuring Only the Volumetric Resistance UN
13. unctions Line Earth terminal terminal Indicator window Seiad uar terminal Bottom cover setscrew selector switch Bottom cover LIGHT key Indicator window Range selector switch Used to switch between the ranges for measuring insulation resistance and to select the OFF position battery check MEAS key Used for insulation resistance measurements and battery checks LIGHT key Used to turn the lamp for the indicator window on or off Line terminal Earth terminal Guard terminal Bottom cover Bottom cover setscrew Used to replace batteries 3 Measuring the Insulation Resistance e Connecting the Probes UN MINT ite item 4 Securely plug the line probe into the LINE terminal and the earth probe into the EARTH terminal e Disconnecting the Probes AN MINIM te ltem 4 1 Make sure the range selector switch is off 2 Unplug the respective probes e Measuring the Insulation Resistance UN WENT Items 1 3 and 6 KULLI Items 3 4 and 5 1 Adjust the range selector switch to the voltage rated voltage to be applied to the DUT 2 If the DUT is grounded connect the earth probe clip to the DUT s ground line If the DUT is not grounded the earth probe clip may or may not be connected to the DUT s ground line 3 Bring the line probe into contact with the DUT and then press the MEAS key The pointer then indicates the insulation resistance of the DUT During measurement exercise care to p
14. ure humidity A change when a capacitor of SUF 10 is connected in parallel with a resistor corre sponding to the midpoint indication connected must be 10 or less of indication SOM or more between electric circuits and outer case when tested at 500V if the rated measuring voltage is 500 V or less and at a voltage identical to the rated voltage if the rated voltage exceeds 500 V 3700 V AC for one minute between the electric circuits and the outer case When a vibration frequency of 16 7 Hz and peak to peak amplitude of 4 mm are applied to the direction of the axis of the moving part the specifications for toler ances friction and the effect of tilting must be met When shock of 1000 m s is applied twice in the direction of axis of the moving part and the direction perpendicuar to the axis specifications for tolerance friction and effect of tilting must be met When a resistor corresponding to the midpoint indication is connected across the mea suring terminals and the power switch is repeatedly turned on and off 10 000 times at the rate of about 300 times hour the specifications for tolerance and friction must be met When an AC voltage of 50 or 60Hz at 1 2 times the rated measuring voltage is applied to the measuring terminals for 10 seconds no abnormality must occur 0 to 40 C 90 RH or less no condensing 10 to 60 C 70 RH or less No condensing remove the battery Description Model PartNo Qt y Remarks Batteries R6
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