MG5000
HIGH VOLTAGE
DIGITAL INSULATION RESISTANCE TESTER
INSTRUCTION MANUAL
Page 1: ...MG5000 HIGH VOLTAGE DIGITAL INSULATION RESISTANCE TESTER INSTRUCTION MANUAL ...
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Page 3: ... LIGHT Button 5 4 4 DAR PI Display Switching DISPLAY Button 5 4 5 Auto Hold 5 4 6 Auto Power Off 6 4 7 Battery Monitor 6 5 MEASURING PROCEDURE 5 1 Start up Inspection 7 5 2 Voltage Measurement AC DC V 7 5 3 Insulation Resistance Measurement 8 5 4 Discharge Function 11 5 5 DAR PI Measurement 12 5 6 Voltage Characteristics at Measuring Terminals 14 5 7 Using the GUARD Terminal 15 6 MAINTENANCE 6 1 M...
Page 4: ...amage the product Symbols attached to the product Symbol soliciting reference to this manual before use Do not touch this part because a dangerous high voltage is applied Double or enhanced insulation Earth ground The AC incorrect input protection voltage in the insulation resistance measurement is 1000 V 1 2 Warning Instruction for Safe Use The following instructions are intended to prevent perso...
Page 5: ...d maintain accuracy check the tester in the start up inspection as well as in the inspection to be performed at least once a year 14 The tester is for indoor use only 15 Wear insulating protective gear when using the meter with equipment containing a hazardous live part Also be sure to observe your local and national safety rules 16 Always use the meter in a specified method to prevent the protect...
Page 6: ...red value Auto discharge function to display the discharge situation on the monitor Measurement categories Overvoltage categories CAT II Primary circuit of equipment with a power cord to be connected to a mains socket CAT III Primary circuit of equipment that inputs power directly from the distributor and the circuit from the distributor to the mains socket CAT IV Circuit from the leading wire to ...
Page 7: ...lead Black Alligator clip Test probe Hook probe Removable LINE lead Red Removable Test pin cover Removable screw in TL 5K R Removable LINE lead Red 3 m TL 5K B EARTH ground lead Black 3 m TL 5K G GUARD lead Green 3 m TL 5K A Alligator clip TL 5K P Test probe Removable test pin cover Uncovered with the cover CAT II 1000 V Covered with the cover CAT IV 600 V CAT III 1000 V TL 5K H Hook probe No Meas...
Page 8: ... measurement of the AC DC V functions is possible without using the TEST button 4 3 Backlight function LIGHT Button Press the LIGHT button to turn the display backlight on Press the button again to extinguish it The backlight also goes off in 60 seconds after it is turned on 4 4 DAR PI Display Switching DISPLAY Button Press the DISPLAY button during or after measurement to switch the display betwe...
Page 9: ...ce the batteries if you are going to begin measurement for a long period The measurement accuracy is maintained even when the symbol but the accuracy is no longer guaranteed when the single symbol starts to blink For how to replace the batteries see 6 4 Battery Replacement 3 symbols 10 6 V 2 symbols 8 6 10 5 V 1 symbol 7 6 8 5 V 1 symbol BLINK 6 9 7 5 V No accuracy specified 6 8 V or below 5 MEASU...
Page 10: ... new ones see 6 4 If nothing is displayed the batteries may be exhausted totally Also check that the meter and your hands are not moistened by water etc 5 2 Voltage Measurement AC DC V 1 Never input signals exceeding the maximum rated input value see 1 3 2 Use test leads suitable for the measurement category of the object measured When the measurement categories differ between the main unit and te...
Page 11: ...Isolate the power supply to the object measured circuit and make sure no voltage is applied to it before measurement 4 Do not touch the object measured during measurement because the tester generates a high voltage 5 Connect the EARTH ground lead Black first and then the LINE lead Red When disconnecting the test leads disconnect the LINE lead first 6 The tester and measured circuit are charged wit...
Page 12: ... resistance varies widely depending on the temperature and humidity as well as on the test voltage In general it decreases as the temperature humidity or voltage increases 7 The tester may generate a sound during voltage generation particularly when the resistance is low This is not malfunction Nominal test voltage Measurement range Accuracy Note 250 V 0 0 104 9 MΩ 5 rdg 3 dgt OL at 105 0 MΩ or mo...
Page 13: ...arted by pressing the TEST button If this happens check the power supply to the object measured Press and hold the TEST button for more than 2 seconds to start the voltage output When the function uses a voltage of 1000 V or more intermittent buzzer beeps are generated during measurement to warn about the high voltage generation Read the value or bar graph on the display To stop the measurement pr...
Page 14: ...tion resistance measurement The tester detects the current flowing through the object measured during application of DC voltage and calculates the resistance value with the following formula Current I Resistance value Rx Earth Voltage V Resistance value Voltgage Current Rx V I Line 5 4 Discharge Function When the insulation resistance of a capacitive object is measured it is charged by the test vo...
Page 15: ...sed with the following formula DAR Resistance at 60 sec after voltage application Resistance at 30 or 15 sec after voltage application Changing between the 30 and 15 sec settings The default period set at the factory is 15 sec 1 With the power function switch set to OFF press and hold the DISPLAY button while turn the power function switch to ON The display shows DAR and 00 30 or 00 15 in the time...
Page 16: ...t The display in the area inside the frame varies as follows is displayed for 1 minute after the start of measurement The DAR value is displayed in 1 minute The PI value is displayed in 10 minutes After 10 minutes the DAR and PI values can be checked alternately by pressing the DISPLAY button Example of display after completion of measurement A Timer B Measured Value and Terminal voltage C DAR PI ...
Page 17: ...surement A 10 minutes B Value at 10 minutes after the start C PI value 5 Returned to display 1 If the measurement time is insufficient display 1 is returned by skipping other information 5 6 Voltage Characteristics at Measuring Terminals MG5000 Output characteristics Output voltage V Insulation resistance 5000V range 6000 0 1 MΩ 1 MΩ 10 MΩ 100 MΩ 1000 MΩ 10 GΩ 100 GΩ 1000 GΩ 5000 4000 3000 2000 10...
Page 18: ...ster Conductor L G E Insulation Protective wire Cable with sheath 6 MAINTENANCE 1 This section is very important for safety Read and understand the following instruction fully and maintain your instrument properly 2 The instrument must be calibrated and inspected at least once a year to maintain the safety and accuracy 6 1 Maintenance and Inspection 1 Appearance Is the appearance not damaged by fa...
Page 19: ... it may be subjected to excessive vibrations or from where it may fall 4 For storing the instrument avoid hot cold or humid places or places under direct sunlight or where condensation is anticipated 5 When the instrument is not to be used for a long period be sure to remove batteries from it Following the above instructions store the instrument in good environment 6 4 Battery Replacement 1 If the...
Page 20: ...ves the right to inspect all warranty claims to determine the extent to which the warranty policy shall apply This warranty shall not apply to disposables batteries or any product or parts which have been subject to one of the following causes 1 A failure due to improper handling or use that deviates from the instruction manual 2 A failure due to inadequate repair or modification by people other t...
Page 21: ...The service charge or transport freight could sometimes become higher than the product price Please consult us before asking for servicing The minimum retention period of the servicing performance parts of this instrument is six 6 years after the discontinuation of production This period is equal to the servicing available period However the retention period of a part may be reduced if it becomes ...
Page 22: ...umidity 0 40 ºC max relative humidity 85 no condensation Storage temperature humidity 10 60 ºC max relative humidity 90 no condensation with batteries removed Batteries should be removed before storage for a long period Power supply C size alkaline battery 1 5 V LR14 x 8 Auto Power Off Power OFF in about 10 minutes after last operation Max power consumption Approx 18 VA measurement at 5000 V appro...
Page 23: ...ion 250 V 500 V 1000 V 2500 V 5000 V AC DC V Output at short circuit 450 mA 45 mA Output at rated current 750 mA 0 09 MΩ 500 mA 0 18 MΩ 700 mA 0 36 MΩ 1200 mA 0 9 MΩ 1500 mA 1 8 MΩ Output at open circuit 10 mA 10 mA 30 mA 50 mA 100 mA Stand by 45 mA Backlight on 60 mA increases Continuous operation time Approx 25 hours with 5000 V function and 100 MΩ load 8 2 Measuring Ranges and Accuracies Accura...
Page 24: ... V 0 20 DC 2500 V 0 20 DC 5000 V 0 20 Rated current 3 mA 0 5 mA Short circuit current 3 mA 4 mA Terminal voltage display Output Voltage monitor Measurement range Resolution Accuracy 30 6000 V 1 V 5 rdg 10 dgt Note In the insulation resistance measurement the voltage used in measuring resistances lower than 5000 V 1 8 MΩ 2500 V 0 9 MΩ 1000 V 0 36 MΩ 500 V 0 18 MΩ or 250 V 0 09 MΩ is out of the accu...
Page 25: ...and accuracy 2 0 rdg 3 dgt in 1000 V range Error 500 V x 2 0 3 dgt 13 V True value 500 V 13 V 487 to 513 V In the 1000 V range the 3 dgt corresponds to 3 V The product specifications described in this manual and its appearance are subject to change without notice for improvement or other reasons ...
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Page 28: ...01 1610 2040 6014 Dempa Bldg 4 4 Sotokanda 2 Chome Chiyoda ku Tokyo 101 0021 Japan ...
