Manual - Test Equipment Depot
Contents
1. User s Manual Model MY40 Insulation Resistance Tester Thank you for purchasing the Yokogawa M amp C 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 YOKOGAWA Yokogawa M amp C 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 M amp C Corporation is in no way liable for any damage result ing 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 A WARNING This indicates that the operator must refer to an explanation in the user s manual in order to avoid the risk of serious injury or the loss of life Z CAUTION This indicates 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 tester Note This provides important information for handling the tester and clari fies tester functions The following symbols are used on the MY40 tester A Danger Handle with Care This symbol indicates that the operator must refer to an explanation in the user s manual in order to avoid risk2. Verification Make sure that the battery voltages are within the valid rat ings i e the mark is not flashing 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 Mg 3 Connecting the Probes Plug the earth probe into the earth terminal Plug the line probe into the line terminal ZN WARNING Remove the probes from the measured object before attaching detaching the probes to from the tester 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 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 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 t
3. 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 V 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 paag Indicates Comparator setting value or the storage number or The storage number for memory MQ Indicates the unit for insulation resistance for comparator 2 Components Front view 3 LIGHT key MYD fan 2 MEAS key 5 COMPARATOR key Side view Rear view 12 Earth terminal 13 Line terminal awe _ amp sow g 250v o E HONDA wi A 4 Protective cover fitting 1 Display window LCD 6 ALARM LED 7 Function selector switch 8 1000 V RELEASE button for setting 1000 V rating SSSA z 11 Shoulder strap guide 1D 9 Battery cover setscrew 10 Battery cover 6 Functions for Each Component 1 Display window LCD Displays the measured values and the function marks see section 5 Display Functions 2 MEAS key Used for measuring the insulati
4. mark appears and the buzzer sounds Also the mea sured value is automatically held for 5 seconds E Selecting the reference value Select from three preset values for each rating Default values no 01 0 1 M amp no 02 0 2 MQ no 03 0 4 MQ 1 Turn the function switch to a measurement rating 2 Press the key 3 COMP appears and the reference value appears on the sub display 4 Pressing the key Select changes the reference value dis play as follows 0 1 MQ 0 2 MQ 0 4 MQ Comparator off no display The reference value currently displayed is selected as the compara tor setting E Setting the preset values Each of the default preset values no 01 to no 03 can be changed independently 1 Turn the function switch from power off to a desired rating while pressing and holding the lt key no 01 on the sub display flashes Press the key Select to select no 02 or no 03 2 Confirm the setting no with the key Enter The reference value on the main display can be set key Select 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 1 gt 2 8 9 0 E Standard Accessories 3 Select the position of the decimal point with the Name Model No Quantity Protection cover 93013 1 Shoulder strap 99005 1 Line probe 98001 1 Earth probe 98002 1 Batteries 4 User
5. s manual IM MY40 E 1 Optional Accessories Name Model No Description 1 Spare probe tip for the 105 mm breaker pi line probe Mode 98001 990 5 mm breaker pin 93015 Houses both the main unit the line ened casa probe and the earth probe Bg9108XA_ Soft case approx 100 W x 190 H x 40 D mm Cable length 1000 mm 3 Accessory bag 4 Replaceable type line probe 98005 5 Spare probe tips for the line probe Model 98005 B9600GN 58 mm general purpose 6 B9600NW 360 mm hook shaped 7 B9600NX 360 mm for extension purposes 8 B9600NZ 108 mm sharp pointed 9 B9635JK 338 mm pickax shaped 1 990 11 4 980 05 9 JK 26 Maintenance E Storage Conditions Temperature and humidity 10 C to 60 C at 70 RH or less Remove the batteries before storing the tester Avoid storing the tester in a location where there is moisture exposure to direct sunlight a high temperature heat source nearby exposure to severe mechanical vibrations a large amount of dust and or salt or 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 M amp C to do the periodic calibration for you Test E
6. Q 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 ZN WARNING Turn off the power to the measured object before connecting or measuring insulation resistance 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 testing terminals Be sure to confirm that the function switch is set to the desired rating Insulation resistance ratings 125 V 200 MQ 250 V 200 MQ 500 V 2000 MQ 1000 V 2000 MQ 2 Setting the Function Switch Turn the function switch to the desired measurement rating posi tion The initial display is MQ 3 Connecting the Earth Probe If the measured object is grounded connect the earth probe clip to the measured object s ground line If the measured object is not grounded this process may be omitted 4 Connecting the Line Probe 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 Note During measurement exercise care
7. case stop the measurement immediately and check the power supply volt age 14 Locing the MEAS Key for Continuous Measurement The MEAS key when pulled up to the right can be locked to ensure the key remains 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 dis charge of the batteries 15 HOLD Feature Measured insulation resistances are automatically held for approximately five seconds Turning off the MEAS key initiates holding 17 Measuring Conductor Resistance Continuity The tester can measure the conductor resistance of 0 400 Q The buzzer beeps for resistances approximately 40 Q or lower Z WARNING Turn off the power to the measured object before connecting or measuring conductor resistance 1 Setting the Function Switch Turn the function switch to an AC voltage measurement V position 2 Connecting the Earth Probe If the measured object is grounded con nect the earth probe clip to the mea sured object s ground line If the measured object is not grounded this process may be omitted 3 Connecting the Line Probe Bring the line probe into contact with the measured object The display indicates the AC voltage of measured object 1 Setting the Function Switch Turn the function switch to a conductor resistance measurement Q position 2 Conn
8. ecting the Earth Probe Securely connect the earth probe to the measured object 3 Connecting the Line Probe Bring the line probe into contact with the measured object The dis play indicates the resistance of the measured object Note You do not have to press the MEAS key when you measure conductor resistances 18 Auto Power off The tester is automatically turned off when no key operations are per formed for 10 minutes The buzzer sounds 9 and a half minutes after the last key operation at 1 sec intervals If any measurement or key operation is not made while the buzzer sounds the tester is turned off However it is not turned off when measurement is in progress or an alarm occurs To use the tester after the auto power off is triggered press the key or the key or turn the function switch to the off position once before proceeding with the desired operation 22 Specifications JIS C1302 1994 compliance 125V 200 MQ Center Value Indicated M9 5 250V 200 MQ 500V 2000 MQ 1000V 2000 MQ 5 50 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 Mo 0 0 0199 0 to 0499 0 to 999 0 to1 999 2nd Effective Measuring Range 10 01 to 20 Upper Limit Ma 0 200 20 01 to 200 501 to 2000 1001 to 2000 Lower Measuring Limit of i gt 0 125 Resistance M9 0 25 0 5 2 Rated Curre
9. ey is used as the Enter key for settings and storage num bers of the comparator and memory functions Pressing the Enter key while the display is flashing confirms selection of the setting or the storage numbers 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 G key or the key when all the digits appear and hold the key until the buzzer sounds E Backlight The backlight remains off while the comparator is set The backlight is lit when memory is in use 20 Memory Feature Data Saving Up to 20 measured values of the insulation resistance for each rating can be saved to memory E Displaying data 1 Turn the function switch from power off to a measurement rating while pressing and holding the key MEM MEM appears and no 01 storage number flashes on the sub display 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 If any data is not saved with the selected displayed number is displayed E Saving data First select a sto
10. g when the MEAS key 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 Auto power off The tester is automatically turned off when no key operations are performed for 10 minutes LCD backlight The backlight can be turned on off with the LIGHT key Locking the MEAS key Pulling the MEAS key up allows for continuous measurement over a prolonged time 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 5 Display Functions IM MY40 E 2nd Edition July 2001 Z 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 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 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 Do not press the MEAS key while measuring AC voltages Voltage that exceeds the specified limit must not be applied to terminals 4 Probes Use the probes supplied by Yokogawa M am
11. he strap to allow you a good view of the tester 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 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 9 Battery Replacement ZN WARNING Remove the probes from the tester and then turn off the MEAS key before opening the casing to replace the batteries 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 A N CAUTION Do not mix batteries of different types or new batteries with used ones 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 M
12. is manual Should any errors or omissions come to your attention however please inform Yokogawa M amp C Corporation accordingly
13. nt mA 1 to 1 2 0 5 to 0 6 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 0 to 600 Standard test conditions 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 gggmark must not be indicated Item Limit Digital indication 3 sec or less Response time Bar graph indication static value approx 2 sec Test condition From the instant the resistors whose values correspond to central indication and zero indications are abruptly connected to when the pointer reaches a level within tolerance Effect of temperature 2 or less 1st effective measuring range maximum center and minimum indicated values Deviation from those values when ambient temperature is varied from 20 C by 20 C Effect of humidity Within tolerance When the tester is left for 1 hour with the h
14. of injury or death of personnel or damage to the tester A 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 AO AC Voltage This symbol indicates the presence of an AC voltage Double Insulation This symbol indicates double insulation 3 Measuring Functions and Additional Features E Measuring Functions Measuring the insulation resistance four ratings 125 V 200 MQ 250 V 200 MQ 500 V 2000 MQ 1000 V 2000 MQ Measuring AC voltages sine wave at 45 to 400 Hz Measuring conductor resistances 0 to 400 0 Q Continuity test beeps for 40 Q or less E Additional Features Memory feature data saving Up to 20 measured values of the insulation resistance for each rating can be saved to memory 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 Comparator When a measured insulation resistance is less than the refer ence value setting the LOW mark appears and the buzzer beeps HOLD feature Measured insulation resistances are automatically held for approximately five seconds High voltage indication If a DC voltage exists between the terminals the HV mark and the ALARM LED come on Discharge feature The tester is designed to begin dischargin
15. on 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 1000 V 2000 MQ Insulation resistance measurement 500 V 2000 MQ Insulation resistance measurement 250 V 200 MQ Insulation resistance measurement 125 V 200 MQ Insulation resistance measurement AC voltage measurement maximum input voltage 600 V Power off 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 GUARD function is not a standard function 8 Before Measurement 1 Safety Read the handling precautions in this manual carefully Make sure it is safe before starting measurement 2 Battery Voltage
16. operly 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 The tester displays nothing after turning the function switch to the on position The display is light in color The measured values are erroneous Items to Check The batteries are installed properly and their power levels are not low 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 E About This Manual The contents of this manual are subject to change without prior notice Under absolutely no circumstances may the contents of this manual be transcribed or copied in part or in whole without obtaining permis sion Every effort has been made to ensure accuracy in the preparation of th
17. ower switch is repeatedly turned on and off 10 000 cycles at a rate of about 300 cycles hour Protection against A z There must not be an abnormality mistaken input When an AC voltage of 50 60 Hz at 1 2 times the rated measuring voltage is applied to the measuring terminals for 10 seconds 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 probe and line probe Safety standards EN61010 1 1993 and EN61010 2 31 1995 Insulation class I Pollution degree 2 Overvoltage category Ill maximum input voltage 600 V EMC standards EN55011 1998 Group ClassB EN61326 1 1997 A1 1998 Effect of radiation At the strength of radio frequency electromagnetic field of immunity 3V m Insulation resistance measurement 1st effective measuring range 5 of rdg 12dgt 2nd effective measuring range 10 of rdg 12dgt AC Voltage measurement 5 of rdg 12dgt Conductor resistance measurement 10 of range 19 LIGHT and COMP Keys The key is used as the Select key for settings and storage num bers of the comparator and memory functions The k
18. p C with this tester Do not use probes that have deteriorated or are defective Remove the probes from the measured object before attaching detaching the probes to from the tester 5 Insulation of Casing 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 Turn off the power to the measured object before you begin measuring insulation resistance 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 Do not operate the tester in an atmosphere where any flammable or explosive gas is present Do not use the tester if there is condensation on it 8 Disassembly No person except personnel from Yokogawa M amp C is authorized to disassemble this instrument 4 Overrange Display Functions E OL Display The tester displays the OL mark when the measured resis tance exceeds 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 00 mark
19. quipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Main display COMP sgae Lal Bat LILI MO Sub display Position of decimal point Main display Sub display Insulation resistance measurement with comparator Measured value Reference value Comparator setting Reference value no 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 To cancel the et 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 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 125 4 92 52 5 2 07 O 103 4 06 Earth probe 98002 1200 47 24 ii ar wc Line probe 38001 1200 47 24 27 Corrective Measures in Case of Failure If the instrument does not operate pr
20. rage number as in steps 1 and 2 above Over writing data is possible 3 Perform measurement with the MEAS key 4 Turn off the MEAS key The measured value is held and starts flashing Press the G2 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 Y key MEM CLr starts flashing 4 Press the G2 key MEM again while CLr is flashing The buzzer sounds and all data are deleted do not change the position of he function dial for two seconds when CLr is displayed The ester changes its mode to measurement of conductor resis ances 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 When a measured insulation resistance is less than the reference value setting the LOW
21. to prevent the leadwire of the line probe from coming into contact with the ground floor or any other object Not observing this precaution may result in a failure to measure the correct insulation resistance 16 Measuring AC Voltages Z WARNING Do not press the MEAS key while measuring AC voltages Voltage that exceeds the specified limit 600 V must not be applied to terminals Doing so causes all digits of the measured voltage to flash and the buzzer to beep 5 After Measurement ZN WARNING Immediately after measurement electrical charges resulting from the applied testing voltage may remain present in the probes or measured object 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 12 Double action 1000 V Function The tester is equipped with the RELEASE button to protect the mea sured circuit from damage due to inadvertent measurement at 1000 V 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 13 Live line Alarm Always turn off the power to the measured object before connecting or measuring insulation resistance If an AC voltage of more than 40 V is applied the ALARM LED flashes and the buzzer beeps In this
22. umidity at 90 RH Effect of external rac 3 or less of indication magnetic field The change of indication when an external field of 400 A m DC is applied in the most affected direction Effect of AC component of voltage at measuring terminals 10 or less of indication A change when a capacitor with 5 uF 10 is connected in parallel to a resistor corresponding to central indication connected Insulation resistance 50 MQ or more between electric circuits and outer case When a voltage of 1000 V is applied There must not be an abnormality Withstand voltage between electric circuits and outer case 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 There are no mechanical and electrical damage Resistance to vibration The specifications for tolerances must be met When a vibration frequency of 16 7 Hz and peak to peak amplitude of 4 mm is applied in the direction of the axis of the moving part for 1 hour There are no mechanical and electrical damage Resistance to shock The specifications for tolerances must be met When shock of 1000 m s is applied twice in the direction of axis of the moving part and in a direction perpendicular to the axis Endurance The specifications for tolerances must be met When a resistor corresponding to the central indication is connected across the measuring terminals and the p
23. 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 To upper range When the digital reading exceeds 4000 the measuring range changes to the next upper range 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 2000 1000 500 200 100 50 20 10 0 5 0 2 0 1 SQN Wit My wen i EI TIV comp eg MEM eee COIL MO 0 0 5 0 0 2 0 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 Lit when the rating setting is 500 V 2000 MQ Lit when the rating setting is 250 V 200 MQ Lit when the rating setting is 125 V 200 MQ Indicates overrange gt Indicates the extension bar graph The extension bar graph shows how the measured value is changing trend as follows Note that the number of 4 marks means the degree of change b Change toward smaller values Change toward larger values gt Stable Lit when Pressing the MEAS key in insulation resistance measure ment and Residual electrical charges are present during discharg
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