- Yokogawa
Contents
1. 6 Confirm the number with the key Enter 7 Set the number for the next digit 8 When settings for all the digits are complete the reference value starts flashing 9 Confirm the reference value with the key Enter The buzzer sounds and the setting ends The tester changes its mode to measurement of insulation resistances Repeat steps 1 to 9 to change other preset values Note e To cancel the preset setting Pressing the key Select in step 8 returns the setting procedure to step 1 To stop the setting turn the function switch to the off position e To set the preset values for another rating Turn the function dial to the desired rating insulation resistance in step 8 25 External Dimensions Unit mm apptox inch Main unit 52 5 2 07 2 ff 1000V 2000MQ JGH ntel MEM L 500V r gt 250V 200M9 v 600V MAX ie w Q 103 4 06 Earth probe 98002 1200 47 24 Line probe eon 1200 47 24 27 Corrective Measures in Case of Failure If the instrument does not operate properly after taking the corrective measures shown below or any other failure that is not covered here occurs contact the vendor from which you purchased the instrument Failures e The tester displays nothing after turning the function switch to the on position e The display is light in color e The measured values are erroneous Items to Check e The batteries are installed properly and their power l2. User s Manual Model MY40 Insulation Resistance Tester Thank you for purchasing the Yokogawa MY40 Insulation Tester To optimize all the functions of the instrument please read this manual thoroughly before operating it Store this manual in a safe place for future reference 1st Edition Nov 2000 YG All Rights Reserved Copyright 2000 Yokogawa M amp C Corporation A2 YOKOGAWA Yokogawa Meters amp Instruments Corporation 1 Safety Precautions Always observe the following instructions Failure to do so may result in electrical shock or other dangers that may lead to serious injury or the loss of life Yokogawa is in no way liable for any damage resulting from the user s mishandling of the tester For safe use of this tester the following safety symbols are used in the user s manual AN WARNING Indicates a hazard that may result in the loss of life or serious injury of the user unless the described instruction is abided by N CAUTION Indicates a hazard that may result in an injury to the user and or physi cal damage to the product or other equipment unless the described instruction is abided by Note This provides important information for handling the tester and clari fies tester functions The following symbols are used on the MY40 tester AN Danger Handle with Care This symbol indicates that the operator must refer to an explanation in the user s manual in order to avoid risk of
3. E Standard Accessories 125V 200 MQ 250V 200 MQ 500V 2000 MQ 1000V 2000 MQ ee Name Model No Quantity Protection cover 93013 A os os os 110 1 2 110 1 2 0 5 to 0 6 2 E Optional Accessories 0 to 600 Name na Standard test conditions Model No Description Ambient temperature and humidity 23 5 C at 45 to 75 RH Position Horizontal within 5 degrees Influence of external magnetic field Earth magnetism Battery voltage Within effective range of the battery the E8 mark must not be indicated 2 Hard case 93015 1 Spare probe tip for the 105 mm breaker pin ine probe Model 98001 99011 P Houses both the main unit the line probe and the earth probe A Soft case approx 100 W x 190 H 3 Accessory bag B9108X x 40 D mm 4 Replaceable type line probe 98052 Cable length 1000 mm Item Test condition f Digital indication 3 sec or less Response time Bar graph indication static value approx 2 sec Effect of temperature 2 or rdg 6 dgt From the instant the resistors whose values correspond to central line probe Model 98005 indication and zero indications are abruptly connected to when 6 B9600NW 360 mm hook shaped the pointer reaches a level within tolerance 1st effective measuring range maximum center and minimum 7 indicated values Deviation from those values when ambient temperature is varied from 20 C by 20 C 8 B9600NZ 108 mm sharp pointed B9600NX 360 mm for extensi
4. contents of this manual be transcribed or copied in part or in whole without obtaining permission 2 Components Front view 3 LIGHT key 1 Display window LCD 6 ALARM LED 7 Function selector switch 2 MEAS key 12 Earth terminal 11 Shoulder strap 13 Line terminal guide 9 Battery cover setscrew 10 Battery cover 7 Using Protection Cover and Shoulder Strap The tester comes with a protection cover and shoulder strap as standard accessories e The protection cover can be used as a front cover for the display window or as a bottom cover It is set as the front cover when delivered from the factory e Using the shoulder strap allows you to position the tester in front of your chest for ease of reading Pass the strap through the shoulder strap guide and ad just the length of the strap to allow you a good view of the tester e Remove the cover from the front and attach it to the bottom using the fixing hole B on the surface of the cover This is useful when the diaplay is too close to your body to see clearly See the figure on the right e A belt on the cover which is fitted with pieces of Velcro can be used to store the probes Remove the probes from the tester terminals when storing them Protection cover fixing holes Shoulder strap 7 WD ll amp TY Y L NN 9 Battery Replace
5. injury or death of personnel or damage to the tester AN High voltage Terminal This symbol indicates a dangerous voltage level terminals with volt ages exceeding 1000 volts must be so marked Never touch the termi nals AC Voltage This symbol indicates the presence of an AC voltage o Double Insulation This symbol indicates double insulation 3 Measuring Functions and Additional Features E Measuring Functions e Measuring the insulation resistance four ratings 125 V 200 MQ 250 V 200 MQ 500 V 2000 MQ 1000 V 2000 MQ e Measuring AC voltages sine wave at 45 to 400 Hz e Measuring conductor resistances 0 to 400 0 Q Continuity test beeps for 40 Q or less E Additional Features e Memory feature data saving Up to 20 measured values of the insulation resistance for each rating can be saved to memory e Live line alarm When an AC voltage of 40 V or more is applied between the input terminals the ALARM LED flashes and the buzzer beeps except during AC voltage measurement e Comparator When a measured insulation resistance is less than the refer ence value setting the LOW mark appears and the buzzer beeps e HOLD feature Measured insulation resistances are automatically held for approximately five seconds e High voltage indication If a DC voltage exists between the terminals the HV mark and the ALARM LED come on e Discharge feature The tester is designed to begin discharging when the MEAS key
6. remain present in the probes or measured object e The tester therefore is designed to automatically begin discharging electricity upon completion of measurement Verify that the ALARM LED turns off when discharging is complete e When setting the memory or comparator function Turn the function switch to an insulation resistance rating position while pressing and holding the key or the key until all the displayed digits stop flashing and remain on and the buzzer sounds Or position the function switch to a rating of the insulation resistance first press the key or the key when all the digits appear and hold the key until the buzzer sounds E Backlight e The backlight remains off while the comparator is set 12 Double action 1000 V Function e The backlight is lit when memory is in use The tester is equipped with the RELEASE button to protect the mea sured circuit from damage due to inadvertent measurement at 1000 V 20 Memory Feature Data Saving To select the 1000 V rating turn the function switch to the position while pressing this button To cancel the 1000 V rating turn the function switch to the off position or another rating position Up to 20 measured values of the insulation resistance for each rating can be saved to memory 13 Live line Alarm E Displaying data 1 Turn the function switch from power off to a measurement rating Always turn off the power to the measured object before connecting or while p
7. ERING ASIA PTE LTD SINGAPORE Phone 65 6241 9933 Facsimile 65 6241 2606 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 8870 1100 Facsimile 61 2 8870 1111 YOKOGAWA INDIA LTD INDIA Phone 91 80 4158 6000 Facsimile 91 80 2852 1441 YOKOGAWA SHANGHAI TRADING CO LTD CHINA Phone 86 21 6239 6363 Facsimile 86 21 6880 4987 YOKOGAWA MIDDLE EAST B S C C BAHRAIN Phone 973 17 358100 Facsimile 973 17 336100 YOKOGAWA ELECTRIC CIS LTD RUSSIAN FEDERATION Phone 7 495 737 7868 Facsimile 7 495 737 7869 IM3E 2008 8 E Measurement Categories Measurement category Description Remarks I CAT I For measurements performed on circuits not directly connected to MAINS I CAT I For measurements performed on circuits Appliances portable equipments etc directly connected to the low voltage installation I CAT II For measurements performed Distribution board circuit breaker etc in the building installation WV CAT V For measurements performed Overhead wire cable systems etc at the source of the low voltage installation A Internal Wiring istribution Board Siti a g u Entrance Cable A a oct ox fe i Outlet Equipment 6 Functions for Each Component 1 Display window LCD Displays the mea
8. ated or are defective e Remove the probes from the measured object before attaching detaching the probes to from the tester 5 Insulation of Casing e A puncture 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 knocked against another object Do not use the instrument before taking the necessary remedial measures ask the manufacturer to repair it 6 The Measured Object e Turn off the power to the measured object before you begin measuring insulation resistance e Avoid touching any electrified parts while using the tester in a location with live electricity For safety it is recommended that you use a pair of rubber gloves or other alternative means 7 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 8 Disassembly e No person except personnel from Yokogawa is authorized to disassemble this instrument Ontline of Measurement Principle A D converter and insulation LCD resistance Function range selector switch High voltage generator MEAS key croui LINE cr Y Discharge feature EARTH Four AA size batteries O Block Diagram of Insulation Resistance Measurement Circuit 4 Overrange Display Functions E OL Display The tester displays the OL mark when the measured resistance exceeds
9. ber of 4 marks means the degree of change b Change toward smaller values tul Change toward larger values d Stable Lit when e Pressing the MEAS key in insulation resistance measure ment and e Residual electrical charges are present during discharg ing COMP Lit when the comparator is activated LOW Lit when the measured insulation resistance is lower than the comparator setting value MEM Lit when the memory feature is in use y Indicates the unit for AC voltage measurement MQ Indicates the unit for insulation resistances Q Indicates the unit for conductor resistance measurement e Indicates the continuity mark which is lit when the measured insulation resistance is lower than 40 Q Sub display pagn Indicates e Comparator setting value or the storage number or e The storage number for memory MQ Indicates the unit for insulation resistance for comparator YOKOGAWA Yokogawa Meters amp Instruments Corporation Yokogawa Meters amp Instruments Corporation International Sales Dept Tachihi Bid 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 1 800 888 6400 Facsimile 1 770 254 0928 YOKOGAWA EUROPE B V THE NETHERLANDS Phone 31 33 464 1611 Facsimile 31 33 464 1610 YOKOGAWA AMERICA DO SUL LTDA BRAZIL Phone 55 11 5681 2400 Facsimile 55 11 5681 4434 YOKOGAWA ENGINE
10. dling precautions in this manual carefully e Make sure it is safe before starting measurement 2 Battery Voltage Verification e Make sure that the battery voltages are within the valid rat ings i e the mark is not flashing e If the batteries are low replace them as specified in the bat tery replacement section of this manual Note As the mark indication depends on the load current consumption check that the mark does not appear for the largest load when short circuiting the earth probe and the line probe 0 MQ 3 Connecting the Probes e Plug the earth probe into the earth terminal e Plug the line probe into the line terminal AN WARNING e Remove the probes from the measured object before attaching detaching the probes to from the tester e Make sure the MEAS key is off when attaching detaching the probes to from the tester 4 Function Switch Verification Be sure to confirm that the function switch is set to the desired rat ing 5 1000 V Rating When measuring with the 1000 V rating see section 12 Double action 1000 V Function Side view E About This Manual e The contents of this manual are subject to change without prior notice e Every effort has been made to ensure accuracy in the preparation of this manual Should any errors or omissions come to your attention however please inform Yokogawa Meters amp Instruments Corporation accordingly e Under absolutely no circumstances may the
11. e 100 or less of the tester s intrinsic errors When an AC voltage 1 2 fold the rated measuring voltage at 50 Hz or 60 Effect of external There must not be an abnormality Hz is applied to the measuring terminals for 10 seconds with the MEAS voltage key being on and then off Test point The minimum measurable resistance that can maintain the Model Range Number of measurements rated measuring voltage Possible number of 125 V 200 MQ measurements MY40 01 250 V 200 MQ 500 V 2000 MQ 1000 V 2000 MQ Approx 1600 Approx 1400 Approx 1000 Approx 700 Measuring time Five seconds each with approx 25 seconds between measurements Backlight Off Battery used Manganese battery Ambient temperature 20 2 C Relative humidity 65 20 Battery testing conditions in compliance with JIS C8501 e Class IP 40 Foreign substances of 1 0 mm or more in diameter JIS C0920 compliance with measuring probes attached to the tester and dust penetration must not enter at all IEC 60529 Degrees of protection provided by enclosures 23 General Specifications Operation temperature 0 C to 40 C at 90 RH or less no condensation and humidity Storage temperature 10 C to 60 C at 70 RH or less no condensation and humidity Battery Four AA size R6 External dimensions Approx 125 W x 103 H x 52 5 D mm Weight Approx 420 g main unit and batteries only Approx 600 g main unit batteries protective cover earth pr
12. e Earth Probe e If the measured object is grounded connect the earth probe clip to the mea sured object s ground line e If the measured object is not grounded this process may be omitted 3 Connecting the Line Probe Do not press the MEAS key while measuring AC voltages e Voltage that exceeds the specified limit 600 V must not be applied to terminals Doing so causes all digits of the measured e Bring the line probe into contact with the measured object The display indicates the AC voltage of measured object 17 Measuring Conductor Resistance Continuity The tester can measure the conductor resistance of 0 400 Q The buzzer beeps for resistances approximately 40 or lower Note 19 LIGHT and COMP Keys During measurement exercise care to prevent the leadwire of the line probe from coming into contact with the ground floor or The key is used as the Select key for settings and storage num any other object Not observing this precaution may result in bers of the comparator and memory functions a failure to measure the correct insulation resistance The key is used as the Enter key for settings and storage num 5 After Measurement bers of the comparator and memory functions Pressing the Enter key while the display is flashing confirms selection of the setting or the AN WARNING storage numbers e Immediately after measurement electrical charges resulting from the applied testing voltage may
13. evels are not low e The measuring probes are connected correctly and are not dam aged Whether the failure reoccurs after turning off the power and retry ing the operation Error Messages Err 0 An internal operation failure Turn off the power and retry the operation If the failure reoccurs the tester needs repairing Err 1 Cannot save the comparator or memory settings Measurement functions other than the comparator and memory functions operate normally Settings and data saved without the error indication Err 1 can be used If the failure reoccurs the tester needs repairing Err 2 An internal operation failure Turn off the power and retry the operation If the failure reoccurs the tester needs repairing IM MY40 E lt 2 gt
14. is turned off It indicates the discharging status with a bar graph and the HV mark and ALARM LED come on during discharging and off when discharging is complete e Auto power off The tester is automatically turned off when no key operations are performed for 10 minutes e LCD backlight The backlight can be turned on off with the LIGHT key e Locking the MEAS key Pulling the MEAS key up allows for continuous measurement over a prolonged time e Lock for inadvertent setting of 1000 V range This mechanism protects the measured circuit from damage due to inadvertent measurement with the highest voltage 1000 V IM MY40 E 6th Edition Aug 2008 KP N WARNING E Always observe the following instructions Failure to do so may result in electric shock or other dangers that may lead to serious injury or the loss of life 1 During Measurement of Insulation Resistance e A high voltage is present at the probes Do not touch the measured object or the earth or line terminal 2 Immediately After Measurement of Insulation Resistance e The probes or the measured object may remain highly charged Do not touch them immediately after the completion of measurement 3 During Measurement of AC Voltages e Do not press the MEAS key while measuring AC voltages e Voltage that exceeds the specified limit must not be applied to terminals 4 Probes e Use the probes supplied by Yokogawa with this tester e Do not use probes that have deterior
15. le 3 Perform measurement with the MEAS key 4 Turn off the MEAS key The measured value is held and starts flashing Press the key Enter while the measured value is flashing to save it to memory it is held for five seconds in which time the next data cannot be saved Note If the data being held is invalid is displayed and it cannot be saved In this case perform measurement again and save the data E Deleting data Data saved can be collectively deleted 1 Turn the function switch from power off to the continuity test po sition Clr while pressing and holding the key MEM 2 MEM and CLr appear 3 Press the key MEM CLr starts flashing 4 Press the key MEM again while CLr is flashing The buzzer sounds and all data are deleted do not change the position of the function dial for two seconds when CLr is displayed The tester changes its mode to measurement of conductor resis tances Note To stop deleting of data Do not perform any key operation and wait for 10 seconds while the CLr indication mentioned in step 3 is flashing or Turn the function switch to another rating E Turning off the memory feature Turn the function switch to the off position 21 Comparator Main display Sub display Position of decimal point Main display Sub display Insulation resistance measurement Measured value Reference value with comparator
16. ment A N WARNING e Remove the probes from the tester and then turn off the MEAS key before opening the casing to replace the batteries e Do not touch the MEAS key during replacement Otherwise a high voltage may be produced 1 Loosen the battery cover setscrew and then slide the cover off of the main unit 2 Replace all of the 4 batteries at the same time and make sure the polarities of the new batteries are exactly as shown on the battery holder 3 After replacing the batteries attach the battery cover and tighten the setscrew CAUTION e Do not mix batteries of different types or new batteries with used ones e Always remove the batteries if the tester will not be used for a prolonged period of time If you store the tester with the batteries left installed fluid is likely to leak from them resulting in a malfunctioning of the instrument 10 Battery Life Reference only For MY40 at rated 500 V 2000 MQ Approximately 15 hours when in continuous operation with center value indicated approx 50 MQ with standard supplied batteries Note The data above is typical Nevertheless the battery life varies depending on the operating conditions Check the batteries before measurement 11 Measuring the Insulation Resistance 1 Before Connecting the Probes A N WARNING measuring insulation resistance testing terminals rating Insulation Resistance Measurement Power suppl
17. obe and line probe 26 Maintenance Safety standards EN61010 1 and EN61010 2 31 E Storage Conditions Insulation class II Pollution degree 2 e Temperature and humidity 10 C to 60 C at 70 RH or less Measurement category II e Remove the batteries before storing the tester CAT III maximum working voltage 600 V AC e Avoid storing the tester in a location where there is Indoor use Operating altitude 2000m max above sea level moisture exposure to direct sunlight l EN55011 ClassB Groupi a high temperature heat source nearby PSAN EN61326 ClassB exposure to severe mechanical vibrations Effect of radiation At the strength of radio frequency electromagnetic field of a large amma of dust and or salt or a corrosive gas immunity 3V m E Removal of Dirt Do not use solvents such as paint thinners or benzine or chemicals 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 to do the periodic calibration for you e Insulation resistance measurement 1st effective measuring range 5 of rdg 12dgt 2nd effective measuring range 10 of rdg 12dgt e AC Voltage measurement 5 of rdg 12dqgt e Conductor resistance measurement 10 of range E Saving data First select a storage number as in steps 1 and 2 above Over writing data is possib
18. on purposes Effect of humidity Within tolerance When the tester is left for 1 hour with the humidity at 90 RH 9 B9635JK 1338 mm pickax shaped A change when the maximum center and minimum values of the first erect a ewe 1 2 or less of indication effective measuring range are indicated and an external field of 400 A m magnete ne DC is applied in the most affected direction A change when a capacitor of 5 mF 10 is connected in parallel with a resistor 1 99011 4 98052 Effect of AC component 10 or less of indication the value of which is determined from the rated measuring voltage and current l and which is itself connected to the measuring terminals S55 n There must not be an abnormality Withstand voltage oe OE between electric circuits and outer case Effect of vibration Terg la no Structura damage ano ME OETA CEM NOTS Wives Ne 1 mm is applied for 20 minutes in each of three directions that are 100 or less of the tester s intrinsic errors perpendicular to each other When a sine wave or the like is applied between the electric circuits and the outer case at 5550 V AC and 50 60 Hz for 1 minute When a vibration frequency of 25 Hz and a peak to peak amplitude of and reverse for 6 ms three times in each of three directions that are perpendicular to each other There is no structural damage and the difference in errors must be When a half sine pulse shock of 1000 m s is applied in both forward Effect of shock a Rene
19. rement ae ates soa MO 0 4 MO Q position no 01 0 1 MQ no 02 0 2 MQ no 03 0 2 Connecting the Earth Probe 1 Turn the function switch to a measurement rating Securely connect the earth probe to the measured object A j 2 Press the key 3 Connecting the Line Probe Bring the line probe into contact with the measured object The dis 3 COMP appears and the reference value appears on the sub play indicates the resistance of the measured object display 4 Pressing the key Select changes the reference value dis Note play as follows You do not have to press the MEAS key when you measure 0 1 MQ 0 2 MQ 0 4 MQ Comparator off no display conductor resistances The reference value currently displayed is selected as the compara tor setting 18 Auto Power off E Setting the preset values Each of the default preset values no 01 to no 03 can be changed The tester is automatically turned off when no key operations are per independently formed for 10 minutes l hil The buzzer sounds 9 and a half minutes after the last key operation at 1 Turn the function switch A AA to a desired rating while 1 sec intervals If any measurement or key operation is not made while pressing and holding the key no 01 on the sub display the buzzer sounds the tester is turned off However it is not turned off flashes Press the key Select to select no 02 or no 03 when measurement is in progress or an alarm occurs 2 Con
20. ressing and holding the key MEM measuring insulation resistance If an AC voltage of more than 40 V is MEM appears and no 01 storage number flashes on the sub applied the ALARM LED flashes and the buzzer beeps In this case display stop the measurement immediately and check the power supply volt 2 Select a storage number Press the key Select to select a storage number no 01 to no 20 If an insulation resistance data is saved with the selected displayed number the insulation resistance value is displayed The MEAS key when pulled up to the right can be locked to ensure the If any data is not saved with the selected displayed number is key remains turned on Use this mechanism when making continuous displayed measurement over a prolonged period Note however that leaving the key turned on for an unreasonably long time will accelerate the dis charge of the batteries age 14 Locking the MEAS Key for Continuous Measurement A N WARNING e Turn off the power to the measured object before connecting or measuring conductor resistance When a measured insulation resistance is less than the reference value setting the LOW mark appears and the buzzer sounds Also the mea sured value is automatically held for 5 seconds E Selecting the reference value 1 Setting the Function Switch Select from three preset values for each rating Turn the function switch to a conductor resistance measu
21. sured values and the function marks see section 5 Display Functions 2 MEAS key Used for measuring the insulation resistance only 3 LIGHT key Used for turning on off the backlight MEM key Also used for setting memory Enter key Also used for confirmation for the comparator and memory functions 4 Protective cover fitting 5 COMP key Used for setting the comparator Select key Also used for selection for the comparator and memory functions 6 ALARM LED Flashes for the live line alarm and is lit as a warning for the high voltage alarm 7 Function switch A rotary switch for setting measurement ratings with the following positions e 1000 V 2000 MQ Insulation resistance measurement e 500 V 2000 MQ Insulation resistance measurement e 250 V 200 MQ Insulation resistance measurement e 125 V 200 MQ Insulation resistance measurement e AC voltage measurement maximum input voltage 600 V e Power off e Conductor resistance measurement Continuity test CLr Memory clear 8 1000 V RELEASE button Turn the function switch to the 1000 V rating position while press ing this button 9 Battery cover setscrew Undo to replace batteries 10 Battery cover 11 Shoulder strap guide The shoulder strap is passed through it 12 Earth terminal Connection for earth probe 13 Line terminal Connection for line probe Note e GUARD function is not a standard function 8 Before Measurement 1 Safety e Read the han
22. the following values Insulation resistance measurement For 1000 V and 500 V ratings 2000 MQ For 250 V and 125 V ratings 200 MQ Conductor resistance measurement 400 Q E coDisplay The tester displays the co mark when the internal calculation exceeds the following values Insulation resistance measurement For 1000 V and 500 V ratings approx 4000 MQ For 250 V and 125 V ratings approx 400 MQ E Change to Upper Lower Ranges e TO upper range When the digital reading exceeds 4000 the measuring range changes to the next upper range e To lower range When the digital reading falls below 360 the measuring range changes to the next lower range E Lower Resolution Display If the digits below the decimal point are not stable they can be automatically omitted to limit the resolution 5 Display Functions 2000 1000 500 200 100 50 20 10 0 5 0 2 0 1 0 0 5 0 0 2 0 AANS SALTET WWM won OOP LILI LI v nee LI LILi Lt MO 7 e mem Lit when the measured insulation resistance is being held Flashes when the battery voltage is low Lit when the rating setting is 1000 V 2000 MQ 500V Lit when the rating setting is 500 V 2000 MQ 250V Lit when the rating setting is 250 V 200 MQ gt S k S 125V Lit when the rating setting is 125 V 200 MQ Q rm Indicates overrange dadh Indicates the extension bar graph The extension bar graph shows how the measured value is changing trend as follows Note that the num
23. tri the setting now key Enter To use the tester after the auto power off is triggered press the key The reference value on the main display can be set or the key or turn the function switch to the off position once before 3 Select the position of the decimal point with the key Select proceeding with the desired operation 4 Confirm the decimal point with the key Enter 5 Select the number for each digit sequentially Pressing the key Select changes the number as follows 0 gt 17 gt 2 8 gt 9 gt 50 22 Specifications JIS C1302 2002 compliance Center Value Indicated MQ 50 1st Effective Measuring Range MQ 0200 to 10 00 0500 to 20 00 1 000 to 500 2 000 to 1000 2nd Effective Measuring Range Lower Limit MQ 0 to 0199 2nd Effective Measuring Range 10 01 to 200 Upper Limit MQ Lower Measuring Limit of 0 125 Resistance MQ Rated Current mA 1 to 1 2 AC Voltage Measuring Range V Tolerances under the above conditions Insulation resistance measurement 2 of rdg 6 dgt within the 1st effective measuring range 5 of rdg 6 dgt within the 2nd effective measuring range Lower limit 5 of rdg within the 2nd effective measuring range Upper limit Zero value indicated 6 dgt max AC voltage 2 of rdg 6 dgt Conductor resistance measurement 2 of rdg 8 dgt No load voltage within 130 of the rated voltage Short circuit current 2 mA or less Line probe 98001 Batteries
24. y side primary Set the switch to OFF Earth probe Load side secondary Measurement wiring Insulation resistance ratings 125 V 200 MQ 250 V 200 MQ 500 V 2000 MQ 1000 V 2000 MQ 2 Setting the Function Switch e Turn off the power to the measured object before connecting or e Electrical charges may be present in the cables attached to or metal of the electrical equipment being tested Verify that the equipment is free from electrical charges before connecting the e Be sure to confirm that the function switch is set to the desired Turn the function switch to the desired measurement rating posi tion The initial display is MQ 3 Connecting the Earth Probe e If the measured object is grounded connect the earth probe clip to the measured object s ground line e If the measured object is not grounded this process may be omitted 4 Connecting the Line Probe e Bring the line probe into contact with the measured object and then press the MEAS key The display indicates the in sulation resistance of the measured object 15 HOLD Feature Measured insulation resistances are automatically held for approxi mately five seconds Turning off the MEAS key initiates holding 16 Measuring AC Voltages Z N WARNING voltage to flash and the buzzer to beep 1 Setting the Function Switch Turn the function switch to an AC voltage measurement V position 2 Connecting th
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