Manual - Test Equipment Depot
Contents
1. V 100 M Q 500 V 1000 M Q 1000 V 2000 M Q Central Indication 0 5 M Q 1MQ 2MQ 20MQ 50M Q 1st Effective Measuring Range 0 05 to 20 M Q 0 02 to 10 MQ 0 1 to 50M Q 1 to 500 MQ 2 to 1000 MQ 2nd Effective Measuring Range 0 01 to 0 02 M Q 10 to 20 M Q 0 01 to 0 05 M Q 20 to 50 M Q 0 05 to 0 1 MQ 50 to 100 M Q 0 5to1MQ 500 to 1000 M Q 1to2MQ 1000 to 2000 M Q Lower Measuring Limit of Resistance 0 125M Q 0 25MQ 0 5MQ 1MQ 2MQ Rated Current 1to 1 2 mA 1 to 1 2 mA 1to1 2mA 0 5 to 0 6 mA 0 5 to 0 6 mA AC Voltage Measuring Range 0 to 250 V 0 to 300 V E First and second effective measuring ranges Central indication vy 52 Tolerances under the above conditions Resistance measurement 5 of reading within the 1st effective measuring range 10 of reading within the 2nd effective measuring range Infinity and zero indications 0 7 or less of scale length AC voltage 10 of the maximum value No load voltage Within 130 of the rated voltage Short circuit current 12 mA or less Scale length Approx 107 mm 0 to 500 V 0 to 500 V 0 to 500 V lt 1 gt 1st effective measuring range lt 2 gt 2nd effective measuring range The values which belong to both the first and second ranges in the table above are included in the first range Standard test conditions Ambient temperature and humidity 23 5 C at 45 to 75 RH Position Horizontal within 5 degrees Infl2. 0 V if the rated measuring voltage is 500 V or less or at a voltage identical to the rated voltage if the rated voltage exceeds 500 V There must not be an abnormality between electric circuits and outer case Dielectric withstand voltage 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 8 General Specifications Operation temperature 0 to 40 C at 90 RH or less no condensation and humidity Storage temperature 10 to 60 C at 70 RH or less no condensation and humidity Battery AA size 4 R6 External dimensions Approx 125 W x 103 H x 52 5 D mm Weight Approx 500 g main unit and batteries only Approx 600 g main unit batteries protective cover earth probe and line probe Safety standards EN61010 1 1993 EN61010 2 31 1995 Insulation class II Pollution degree 2 Overvoltage category Il maximum input voltage 600 V EMC Standard EN55011 1998 Group1 ClassB EN61326 1 1997 A1 1998 At the strength of radio frequency electromagnetic field of 3 V m Insulation resistance measurement 1st effective measuring range 10 of rdg 2nd effective measuring range 20 of rdg Infinity and zero indications 1 4 or less of scale length AC Voltage measurement 10 of FS 9 Using Protection Cover and Shoulder Strap The tester comes with a protection cover and shoulder strap as standard accessories
3. Model MY10 Insulation Resistance Tester Thank you for purchasing the Yokogawa M amp C MY10 Insulation Tester To optimize all the functions of the instrument please read this manual thoroughly before operating it Test Equipment Depot 99 Washington Street Melrose MA 02176 Fax 781 665 0780 1 800 517 8431 TestEquipmentDepot com Store this manual in a safe place for future reference 1st Edition Jan 2000 YG All Rights Reserved Copyright 1999 Yokogawa M amp C Corporation YOKOGAWA Yokogawa M amp C Corporation IM MY10 E 1st Edition Jan 2000 3rd Edition July 2001 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 this manual Should any errors or omissions come to your attention however please inform Yokogawa M amp C Corporation accordingly 1 Safety Precautions 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 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 VAN WARNING This indic
4. ates 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 N CAUTION This indicates that the operator must refer to an explanation in the users 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 MY10 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 risk 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 MNAI AC Voltage This symbol indicates the presence of an AC voltage o Double Insulation This symbol indicates double insulation ZN 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 e The probes or the measured object may remain highly charged Do not touch them immediately after the complet
5. e The protection cover can be used as a front cover for the indicator 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 adjust 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 Effect of radiation ilmmunity Protection cover fixing holes Shoulder strap of the cover This is useful when the scale 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 10 External Dimensions Main unit Shoulder strap guide 125 4 92 52 5 2 07 ono 103 4 06 Unit mm Earth probe approx inch 1200 47 24 11 Accessories E Standard Accessories Name Model No Quantity Protection cover 930 13 1 Shoulder strap 990 05 1 Line probe 980 01 1 Earth probe 980 02 1 Batteries 4 User s manual IM MY10 E 1 E Optional Accessories Name Model No Description 1 Spare probe tip for the line 11 1105 mm breaker pin probe Model 98001 930 i pi H
6. e batteries before storing the tester e 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 The specifications for tolerances friction and the effect of tilting must be met There are no mechanical and electrical damage When a vibration frequency of 16 7 Hz and peak to peak amplitude of Resistanceto Vibration 4 mm is applied in the direction of the axis of the moving part for 1 hour The specifications for tolerances friction and the effect of tilting When shock of 1000 m s is applied twice in the direction of axis of must be met There are no mechanical and electrical damage the moving part and in a direction perpendicular to the axis When a resistor corresponding to the central indication is connected The specifications for tolerances and friction must be met across the measuring terminals and the power switch is repeatedly turned on and off 10 000 cycles at a rate of about 300 cycles hour Input over v
7. efore connecting the probes or measuring insulation resistance 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 testing terminals 2 Connecting the Earth Probe e Securely connect the earth probe to the measured object s ground line if the measured object is not grounded this process may be omitted 3 Connecting the Line Probe e Bring the line probe into contact with the measured object and then press the MEAS key The pointer indicates the insu lation resistance of the measured object Note During measurement exercise care 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 4 After Measurement ZN WARNING e 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 Locking 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 c
8. er strap is passed through it 0 1 ou on Earth terminal Connection for earth probe Line terminal l Connection for line probe Note GUARD function is not a standard function 4 Before Measurement 1 Safety e Read the handling precautions in this manual carefully e Make sure it is safe before starting measurement 2 How to Read the Scale e Read the value from the top right of the scale 3 Zero Adjustment e Confirm that the pointer is at the center of the infinity sign o if it is do not press the MEAS key e If itis not adjust the pointer to indicate the center of the infinity sign cc with the zero adjustment screw using a slotted screwdriver 4 Battery Voltage Verification e Press the BATT CHECK key to make sure the battery voltages are within the valid ranges When the battely is checked the pointer must be within the BATT mark Ifthe batteries are low replace them as specified in the battery replacement section of this manual 5 Connecting the Probes e Plug the earth probe into the earth terminal e Plug the line probe into the line terminal ZN 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 5 Measuring the Insulation Resistance 1 Before Connecting the Probes ZA WARNING e Turn off the power to the measured object b
9. esistance e Measuring AC voltages sine wave at 50 60 Hz E Additional Features e Discharge feature The tester is designed to begin discharging when the MEAS key is turned off The ALARM LED turns off when discharging is complete e Battery check This function verifies if the battery voltages are within the valid ranges When the battely is checked the pointer must be within the BATT mark e Phosphorescent scale plate The indicator window lights up according to the intensity of light e Locking the MEAS key Pulling the MEAS key up allows for continuous measurement over a prolonged period of time 3 Components and Their Functions Rear view Front view 1 Indicator window 6 ALARM LED 9 Shoulder strap guide 2 MEAS key i ias 4 Protective cover fitting 8 Battery cover 7 Battery cover setscrew 3 BATT CHECK key 5 Zero adjustment screw 10 Earth terminal 11 Line terminal Side view Indicator window MEAS key BATT CHECK key Verifies if the battery voltages are within the valid ranges Protective cover fitting Zero adjustment screw ALARM LED e Discharge feature On gt Off When lit it indicates that a capacitive component in the measured object remains electrified and will light up even if measurement has been completed It turns off when discharge is complete 7 Battery cover setscrew Undo to replace batteries 8 Battery cover 9 Shoulder strap guide The should
10. ion of measurement 3 During Measurement of AC Voltages 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 M amp 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 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 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 e No person except personnel from Yokogawa M amp C is authorized to disassemble this tester 2 Measuring Functions and Additional Features E Measuring Functions e Measuring the insulation r
11. oltage There must not be an abnormalit When an AC voltage of 50 60 Hz at 1 2 times the rated measuring y voltage is applied to the measuring terminals for 10 seconds protection Resistance to shock Line probe 1200 47 24 r gt Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
12. ontinu ous measurement over a prolonged period Note however that leav ing the key turned on for an unreasonably long time will accelerate the discharge of the batteries Battery Life reference only For MY10 03 at rated 500 V 100 MQ Approximately 10 hours when in continuously operation with central indication approx 2 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 6 Measuring AC Voltages ZX WARNING Do not press the MEAS key while measuring AC voltages Otherwise it may result in a failure e Voltage that exceeds the specified limit must not be applied to terminals 1 Connecting the Earth Probe e Securely connect the earth probe to the measured object s ground line if the measured object is not grounded this process may be omitted 2 Connecting the Line Probe Bring the line probe into contact with the measured object The pointer indicates the AC voltage Read the value on the voltage measurement scale V If the voltage of 20 V AC or more is present between the earth and line terminals the ALARM LED turns on Note When measuring insulation resistance the tester can also be used to verify that there is no voltage present at the measured object 7 Specifications JIS C1302 1994 compliance Rating 125 V 20 MQ 250 V 50 M Q 500
13. ouses both the main unit the line probe 2 Hard case 93015 and the earth probe 3 Accessory bag B9108XA D 100 W x 190 H 4 Replaceable type line probe 98005 Cable length 1000 mm 5 Spare probe tips for the line f probe Model 98005 B9600GN 58 mm general purpose B9600NW 360 mm hook shaped B9600NX 360 mm for extension purposes B9600NZ 108 mm sharp pointed B9635JK 338 mm pickax shaped 12 Battery Replacement Z N WARNING 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 8s ON m 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 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 13 Maintenance Storage Conditions e Temperature and humidity 10 C to 60 C at 70 RH or less e Remove th
14. uence of external magnetic field Earth magnetism Battery Voltage Within effective range for the battery When the battery is checked the pointer must be within the BATT mark Response time 3 sec or less 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 Friction No friction is recognized Effects of inclination 2 or less of the scale length Deviation from the infinity indication when the tester is tilted from a horizontal position by 30 degrees 1 5 or less Effect of temperature 2 0 7 or less of scale length 1 Deviation from central indication when ambient temperature is varied from 20 C by 20 C 2 Deviation from infinity and zero indications 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 humidity at 90 RH Effect ot external 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 measuring terminal voltage 10 or less of indication A change when a capacitor with 5uF 10 is connected in parallel to a resistor corresponding to central indication connected Insulation resistance 50M2 or more between electric circuits and outer case When tested at 50
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