Home

Megger MIT40X-EN Manual

1. ne 19 8 n E current indication 100 0 61 ons Step 3 l a Buzzer ON OFF Step 2 3 i f Lead null Step 4 Connect test leads to conductor s Q Step 1 ie 6 Megger mit430 Figure 9 Continuity test and buzzer Turn the instrument ON by rotating the selector switch to the desired Q position If required the test lead resistance can be set to Zero null by shorting the test leads together and pressing TEST The null fe symbol will show when this has been achieved and the display will read 0 00 Q Press the button to enable disable the audible buzzer function When enabled the sounder symbol will be shown on the screen display The pass threshold is set to 2 Q by default but is adjustable as defined in Setup see section 13 Note that the buzzer defaults to OFF on power up Connect the test leads to the isolated conductor s under test Observe the test result displayed automatically The auxiliary display indicates the actual test current e g 205 mA The maximum is defined in section 13 setup menu 18 www actoolsupply com www actoolsupply com Note The test current displayed is the actual test current used during the test which will depend on the resistance of the circuit under test 12 Resistance measurements kO Range Except MIT40X and MIT480 Test procedure refer to Figure 10 Step 2 Connect leads to conductors Step 3 Result displayed Step 1 F
2. A blown internal fuse will be shown by the symbol flashing until the instrument is switched off Figure 21 Fuse replacement procedure user replaceable The fuse is located behind the rear cover see Figure 3 The rear cover must not be opened if test leads are connected Follow the same procedure as for battery replacement A replacement fuse must be of the correct type and rating i e 500 mA FF H B C 50 kA min 1000 V 82mm x 6mm 18 Preventive maintenance The MIT400 series instruments require very little maintenance Test leads should be checked before use to ensure there is no damage Ensure batteries are removed if the instrument is left unused for an extended period When necessary the instrument can be cleaned with a damp cloth The rubber boot can be removed to aid cleaning Do not use alcohol based cleaners as these may leave a residue www actoolsupply com www actoolsupply com 19 Specification All quoted accuracies are at 20 C Insulation Nominal test voltages MIT400 405 250 V 500 V 1000 V MIT410 420 43050 V 100 V 250 V 500 V 1000 V MIT480 50 V 100 V MIT481 485 50 V 100 V 250 V 500 V 1000 V MIT40X 10 V to 100 V variable 1 V increments Range full scale accuracy Model dependant All ranges 2 2 digits up to 100 MQ Then 1000 volts 3 2 digits 0 2 per GQ 500 volts 3 2 digits 0 4 per GO 250 volts 3 2 digits 0 8 per GQ 100 volts 3 2 digits 2 0 per G
3. t 1 100 u a F100 Figure 6 Standard mode insulation test Three types of timed test are possible a Standard count down timer t Timed tests are performed over a timed period defined by parameter t also refer to Set up procedures 13 Symbol displayed if audible limits are enabled M changes to G where required Screen A Step 6 Amps volts and seconds selection button Alarm on off Step 5 Press to lock test b Polarization Index PI PI is the ratio between the insulation resistance values recorded at 1 minute assigned t1 and at 10 minutes interval assigned t2 i e after 1 minute and 10 minutes PI 10 minute value 1 minute value c Dielectric Absorption Ratio DAR DAR is the ratio between the insulation resistance values at 30seconds assigned t1 and at 60 second interval assigned t2 i e after 30seconds and 60seconds 14 www actoolsupply com www actoolsupply com DAR 60 second value 30 second value During all insulation tests the symbol A will flash indicating that a test voltage is present a Insulation resistance testing timed procedure not MIT400 MIT405 or MIT480 Refer to Figures 7 Screen B Screen C Screen D Indicating a PI test Indicating DAR test Indicating timed test i a dir ter Screen A Indicating insulation test mode Step 1 Connect test leads to circuit Step 3 PI DAR t or INS Step 4 Pres
4. 485 will search for Bluetooth computers At the end of this search the total number of Bluetooth devices will be shown on the main display The partial address of the last detected device will be shown on the auxiliary display Me Partial Address Of n IE Total Device 5 number of Bluetooth devices 4 Use the keys to scroll round and locate the address that matches the required one shown on Download manager window Mf MEGGER M0740 AITANS Properties xi iriad ieoa Hah WELT iuwiocth Carece fi Ad F TEk Tye Mocepnepnd K o HHF arg pT Pirga yi 2 See es 1 I fe PAT dapis Dirite N Saag Mol hits Cie 5 With the required address displayed the three digit code should match the one displayed on the properties screen pair the module by pressing the test button until the lt gt symbols on the auxiliary display alternate www actoolsupply com www actoolsupply com RHF 6 A message bubble may also be displayed on the pc against the Bluetooth icon A Alurtooth device is requesting to connect to your computer 5 To alow thes conmecton cick this message S WIE 096 7 Click on this message and enter a Passkey of 1234 to accept the connection of the test instrument You may also need to accept other message prompts that may be displayed as part of this setup sequence If you get a message bubble or prompt asking you to accept a serial port connection then c
5. DC components of the supply voltage AC DC In DC mode only the DC component is measured 1 Rotate selector switch to the V position 2 Connect test leads to the circuit under test 3 TRMS is the default mode on power up Press the TRMS button to select DC or return to TRMS if required 4 The measured voltage will be displayed on the main digital scale in units of V or mV as appropriate In TRMS mode the measured frequency Hz will be simultaneously displayed on the MIT410 MIT420 MIT430 MIT 481 and MIT 40X instruments as shown on Screen A See Figure 5 Screen B for dc mode display OD For MIT420 430 481 and 485 the measured result may be stored if required by pressing the STORE button Refer to section 14 for further information 12 www actoolsupply com www actoolsupply com 9 Insulation resistance testing general Safety note Insulation resistance testing is performed at high DC voltages and is hazardous if touched Always observe the safety precautions when performing an insulation resistance test and ensure all necessary health and safety precautions are observed Automatic Discharge Capacitive circuits are automatically discharged when the test button is released following an insulation test The circuit under test must be completely de energized and securely isolated before test connections are made 9 1 Standard insulation resistance testing Refer to Figure 6 Note Fo
6. Safety Warnings MIT400 series insulation testers Safety Warnings and Precautions must be read and understood before the instrument is used They must be observed during use 1 10 11 The circuit under test must be switched off de energised securely isolated and proved dead before test connections are made when carrying out insulation and continuity tests Circuit connections and exposed conductive parts and other metalwork of an installation or equipment under test must not be touched during testing The live circuit warning and automatic discharge are additional safety features which may fail and therefore safe working practices must be observed The voltage function will only work if the instrument is functional and switched on After insulation tests capacitive circuits must be allowed to discharge before disconnecting test leads The instrument should not be used if any part of it is damaged All test leads probes and crocodile clips must be in good order clean and with no broken or cracked insulation Ensure that hands remain behind guards of probes clips when testing National Safety Authorities may recommend the use of fused test leads when measuring voltage on high energy systems Replacement fuses must be of the correct type and rating Failure to fit the correctly rated fuse may result in a safety hazard and may cause damage to the instrument in the event of an overload The battery cover must
7. Step 2 Press Next Screen B appears Step 3 Press OK to delete all stored test results Screen C fal Step 1 Switch to DEL lh Figure 17 Deleting all test results 1 Turn the instrument ON by rotating the selector switch to the delete DEL position The latest test result will be displayed Where no results have previously been stored the display will indicate this by three dashes PA Press next button Note that the display now indicates ALL 3 Press OK to delete all the test results Note the progress bar decays as the contents of memory are deleted 4 On completion of the deletion progress the display indicates three dashes signifying that no result remains stored See figure 17 screen C 27 www actoolsupply com www actoolsupply com 16 3 Downloading test results Preparing your MIT430 or MIT485 for Bluetooth Communications Megger Download Manager software and a computer with Bluetooth capabilities are required to communicate with MIT430 and MIT485 instrument Notes on installing these options are explained in the document Additional Bluetooth Information which can be found on the User CD Run Megger Download Manager from the Windows start menu Enable the Bluetooth function on your PC Refer to your PC manual if necessary Select Megger MIT430 MIT485 product by clicking the icon as shown Load the properties screen by clicking t
8. observe the latest unique test result identification number displayed 2 Locate the particular test result identification number by using the A and V buttons then press OK to select 3 The test result will be displayed To scroll through the different measurements used in calculating the PI or DAR ratio use the W only button See figure 15 screens B to E 25 www actoolsupply com www actoolsupply com 16 Deleting test results MIT420 MIT430 MIT481 and MIT485 only Stored test results may be deleted singularly or all together 16 1 Procedure for deleting a single test result refer to Figure 16 aD Memory usage indicator Step 4 Observe new last test result ID Step 2 Check correct record Step 3 Press OK to delete Step 1 Switch to DEL N C An EP Megger mita30 b i Figure 16 Deleting a single test result e Turn the instrument ON by rotating the selector switch to the delete DEL position 2 The latest test result will be displayed Where no results have previously been stored the display will indicate this by three dashes 3 Press OK to delete the displayed test result 4 Observe the new last test result identification number which may be deleted as previously described 26 www actoolsupply com www actoolsupply com 16 2 Procedure for deleting all test results refer to Figure 17 Screen A
9. Q 50 volts 3 2 digits 4 0 per GQ Analogue range 1 GQ full scale Analogue range 1G _ full scale Short circuit current 2mA 0 50 Terminal voltage 0 20 1V Ci lt 1 mA Test current on load 1 mA at min pass value of insulation specified in BS7671 HD384 and IEC364 EN61152 2 2 mA max EN61557 operating range 0 10 MQ to 1 00 GQ Leakage current range 10 uA to 2000 uA Leakage current 10 3 digits Voltage display 3 3 digits 0 5 of rated voltage Polarisation Index PI 10min Iminute ratio Dielectric absorption Ratio DAR 60sec 30sec ratio Notes 1 All ranges measure from 0 00 MQ upwards 2 Above specifications only apply when high quality silicone leads are being used Continuity EN61557 operating range 0 01 Q to 99 9 Q 0 to 100 Q on analogue scale Accuracy 2 2 digits 0 to 100 Q Open circuit voltage 5V t1V Test current 205 mA 5 mA 0 01 Q to 9 99 Q 20mA 1 mA 10 0 Q to 99 9 Q Zero offset at probe tips 0 10 Q typical www actoolsupply com Lead resistance zeroing Buzzer Resistance EN61557 operating range Accuracy Open circuit voltage Short circuit current Voltage range Default Voltmeter Frequency www actoolsupply com Up to 9 99 Q Variable limit 1 Q 2 5 Q 10 Q 20 Q 0 01 KQ to 1000 kQ 0 to 1 MQ on analogue scale 3 up to 50 kQ then 5 2 digits DV eds V 1 5 mA 0 2 mA 0 to 600 V d c 2 2 digits 10 mV to 600 V TRMS sinuso
10. as soon as possible to help us reduce any delays in supporting you should the need arise 4 2 Case contents all instruments MIT400 series instrument Hard carry case Red black test lead set with clips AA LR6 batteries fitted Warranty card Calibration certificate Owners CD manual SP5 remote switched probe Not MIT400 amp MIT480 Download Manager software CD MIT430 and MIT485 only ee ee ee ee ee KKK KM KM OM MIT400 storage with holster MIT400 storage with no holster www actoolsupply com www actoolsupply com 5 Preparations for use all instruments 5 1 Batteries The Megger MIT400 series instruments are supplied with batteries fitted When batteries become exhausted refer to section17 for battery replacement Warning Do not switch the instrument on or connect test leads with the battery cover removed 5 2 Preliminary test lead check Functional verification 1 Before each use of the instrument visually inspect the test leads prods and crocodile clips to confirm that their condition is good with no damaged or broken insulation 2 Check continuity of the test leads by firmly shorting the leads together and read the test lead resistance measurement directly from the display which should be less than 1 0 Q Supply voltage With the exception of voltage measurement range this instrument is designed for use On isolated dead circuits Prior to any testing and using an approved method ensure
11. be in place whilst conducting tests NOTE THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS Users of this equipment and or their employers are reminded that National Health and Safety Legislation requires them to carry out valid risk assessments of all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as inadvertent short circuits Where the assessments show that the risk is significant then the use of fused test leads may be appropriate www actoolsupply com www actoolsupply com 3 Symbols used on the instrument F Caution risk of electric shock G Caution refer to accompanying notes Displayed on the LCD during an insulation test warns that a hazardous voltage may exist at the test lead probes also observe voltage discharges to a safe level On battery cover see section 2 0 notes 10 and 11 At terminals do not exceed rated input voltage o Equipment protected throughout by Double Insulation Class II CE Equipment complies with relevant EU Directives Equipment complies with C tick requirements Do not dispose of in the normal waste stream G SOO V Maximum input voltage 600 V rms www actoolsupply com www actoolsupply com 4 General Description 4 1 Case contents There are important documents that you should read and keep for future reference Please complete the pre paid warranty card and return it to Megger Limited
12. e SP5 probe button The instrument will start an insulation resistance test A To end the test release the probe test button The SP5 remote switch probe replaces the standard red test lead The test button on the probe duplicates the test button operation on the instrument when insulation testing To operate the switch probe connect the probe to the circuit to be tested and press and hold down the button on the probe The insulation test will commence Releasing the button will terminate the test The test lead resistance can be nulled for continuity testing Refer to section 11 2 11 www actoolsupply com www actoolsupply com 8 AC DC voltage and frequency measurements Note Measured voltage must not exceed 600 V phase to earth or Phase to Phase Frequency measurement is not available on MIT400 MIT405 and MIT480 models Procedure for measurement of voltage and frequency Refer to Figure 5 A r 4p eo one DC indicated Ce ae Screen B i 4 v Screen A a c Analogue a c voltage displayed Step 4 Voltage and frequency display d c and voltage display in d c mode Measured frequency TRMS indication Step 5 Measured a c voltage Result store button V or mV Sip o Test button TRMS DC Step 2 Connect test lead to circuit under test Step 1 Selector switch Figure 5 Voltage and frequency measurement Note on TRMS measurement IN TRMS mode the MIT400 will measure both AC and
13. ed and voltage measurement will be displayed 6 4 Backlight operation All instrument displays are backlit The backlight function can be selected at any time while the instrument is switched on by pressing the BACKLIGHT AX button Refer to figure 4 The backlight function will switch off automatically after 20 seconds 10 www actoolsupply com www actoolsupply com 7 Test lead connections Test leads connections are as indicated in figure 2 which shows the test lead sockets at the top of the instrument as well as the switched probe socket and test lead Black test lead connection Red test lead connection SP5 connection Figure 2 Test lead connections 7 1 Standard test leads The Red Black test lead set should be connected to the appropriate sockets on the top of the instrument marked and respectively see figure 2 Test probes and crocodile clips are supplied for connection to the circuit under test Fused test leads are available as an optional accessory 7 2 SP5 Switched probe not MIT400 MIT405 MIT480 and MIT40X The SP5 switch probe allows the user to start a test by pressing the TEST button on the probe instead of on the instrument This allows for complete hands free testing and increases user safety 1 Connect the SP5 probe to the instrument using the special 3 pole ve socket in place of the RED test lead a Select a suitable insulation resistance range Di Press and hold down th
14. he Properties Button Download Manager SPE File View Help Properties Button ff Add Driver MEGGER MEGGER ME MEGGER Discrete MIT MIT300b MIT430 PAT 4 MIT 485 Click on the Bluetooth tab to display the current Bluetooth configuration The preferred method is to Pair From the MIT430 MIT485 To the PC As described in in detail below Users familiar with Bluetooth devices may wish to Pair From the PC In this case Open your Bluetooth Manager usually located in the Status Bar Switch your MIT430 MIT485 to SETUP and follow the procedure for Scan for new devices Once the MIT430 MIT485 has been located Pair up using the Pin 1234 On IBM laptops use Fn with F5 to access Bluetooth Services Procedure for Pairing your MIT430 or MIT485 to your PC 1 Switch the MIT430 MIT485 Range Switch to the Setup position Selector switch set to Setup 2 Scan for local Bluetooth computers Press the yellow test button 5 times until the MIT430 MIT485 displays bt with three dashes or a 3 digit number The three dashes indicate that the instrument has not yet been paired with a p c otherwise the current paired Bluetooth device ID will be displayed www actoolsupply com www actoolsupply com Now press and hold the test button until you see the lt and gt symbols oscillating Release the test button The MIT430
15. idal 40 400 Hz 2 2 digits 0 to 1000 V on analogue scale Unspecified input level 0 10 mV 40 400 Hz For non sinusoidal waveforms additional specifications apply 3 2 digits 101 mV 600 V TRMS and 8 2 digits 10 mV 100 mV TRMS Operates at gt 25 volts a c or d c on any range except OFF 15 400Hz 15Hz 99 9Hz 0 5 1 digit 100Hz to 400Hz Capacitance measurement MIT420 MIT430 MIT481 and MIT485 Measurement range Accuracy Distance by capacitance 100 pF to 10 uF 5 0 2 digits MIT420 MIT430 MIT481 MIT485 Arithmetic conversion from capacitance measurement Default capacitance distance measurement 50 nF km Capacitance range Result storage Capacity Download Bluetooth class Range Power supply Battery life Dimensions Instrument Instrument case Weight Instrument only Instrument plus case 40 nF km to 60 nF m gt 1000 test results Bluetooth wireless Class II up to 10m 5 x 1 5V cells type IEC LR6 AA MN1500 HP7 AM3 ROHP Alkaline NiMH rechargeable cells may be used 2200 insulation tests with duty cycle of 5 sec on 55 sec OFF 1000 V into 1 M 220 x 92 x 50 mm 8 66in x 3 63in x 1 97in 456 x 178 x 89mm 18in x 7in x 3 5in 590gms 775gms with boot 20 7302 27 220z 1 75kg 3 86lb www actoolsupply com www actoolsupply com Fuse Use only a 500 mA FF 1000 V 32 x 6 mm ceramic fuse of high breaking capacity HBC 50 kA minimum G
16. igure 10 Resistance k range 1 Tum the instrument ON by rotating the selector switch to the desired kQ position 2 Connect the test leads to the isolated conductors under test 3 Observe the test result displayed automatically 19 www actoolsupply com www actoolsupply com 13 Capacitance measurements Except MIT400 405 410 480 13 1 Capacitance measurement procedure Step 2 refer to Figure 11 i CI test leads Step 4 Distance Step 3 Test result Step 1 Figure 11 Capacitance range 1 Turn the instrument ON by rotating the selector switch to the capacitance uF position fA Connect the test leads to the isolated conductors under test 3 Observe the test result displayed automatically 13 2 Distance measurement by capacitance 4 For the MIT481 and MIT485 instrument only cable length is also be displayed in feet km or kft as defined in Setup This is calculated from the stored capacitance value default 50 nF km This can be adjusted in section 13 Setup from 40 nF km to 60 nF km 20 www actoolsupply com www actoolsupply com 14 Setup options The setup position permits the user to adjust various threshold values and default settings When SETUP is selected the instrument firmware revision is displayed followed by the buzzer alarm threshold symbol setting options Set top threshold for continuity 5 buzzer in om 50 125 10 200 All Buzzer sounds is result is less than se
17. istance testing timed modes t PI and DAR 10 MIT40X testing 11 Continuity testing Q and buzzer j 12 Resistance measurements kQ Range 13 Capacitance measurements Capacitance measurement procedure Distance measurement by capacitance 14 Setup options 15 Saving recalling and downloading test results Saving test results Test results recall PI and DAR recall 16 Deleting test results Procedure for deleting a single test result refer to Figure 16 Procedure for deleting all test results refer to Figure 19 Preparing your MIT430 or MIT485 for Bluetooth Communications Preparing your MIT430 or MIT485 to your PC Standard download operation 17 Battery and fuse replacement Battery condition and replacement Blown fuse indicator 18 Preventive maintenance 19 Specification 20 Basic and service errors Basic error Service error 21 Accessories 22 Repair and Warranty www actoolsupply com 9 MW ONNN DW W WK OW SS So Ore te oe te ee es Oe Oo eS Se eo foe Oe es ee SJ ON OW OW BR WW DW NY KH KH WO YO NI WW KB WW W WO fF OG WH WwW NB W W NH FF FP D www actoolsupply com 1 Introduction Thank you for purchasing the Megger insulation test instrument For your own safety and to get the maximum benefit from your instrument please ensure that you read and understand the following safety warnings and instructions before attempting to use the instruments www actoolsupply com www actoolsupply com 2 4
18. lass fuses MUST NOT be fitted Safety Protection The instruments meet IEC 61010 1 to 600 V phase to earth Category IV Refer to safety warnings see section 2 MIT 405 IEC 61010 1 600 V phase to earth Category III Application IEC 61010 defines measurement categories from I to IV relating transient over voltages and the location within electrical installations This instrument is designed for use at Category IV Primary supply level on 600 V phase to earth systems E M C In accordance with IEC 61326 1 Temperature effects Temperature coefficient lt 0 1 per C up to 1 GQ lt 0 1 per C per GQ above 1 GQ Environmental Operating range 20 C to 55 C Operating humidity 95 RH at 0 C to 35 C 70 RH 35 C to 55 C Storage temperature range 30 C to 80 C Calibration Temperature 20 C Maximum altitude 2000 m Dust and water protection IP54 20 Basic and service errors The basic error is the maximum inaccuracy of the instrument under ideal conditions whereas the service error is the maximum inaccuracy taking into effect of battery voltage temperature interference system voltage and frequency where applicable 20 1 Basic error See section 19 20 2 Service error Insulation range 15 2 digits Continuity range 26 2 digits Resistance range 12 2 digits Voltage range 10 2 digits Capacitance range 18 2 digits Distance range 18 2 digits Frequency range 5 2 digits www actoo
19. lick and accept ticking the Always allow check box if available 8 When complete the display will indicate End End 9 The MIT430 MIT485 must now be switched to OFF after pairing to complete the process www actoolsupply com www actoolsupply com Standard Download Operation Having completed the initial installation and pairing future downloads to the nominated PC becomes a very straightforward operation as described in the following simple steps a Run Megger Download Manager from the Windows start menu or short cut b Click once on the Megger MIT430 MIT485 icon c Click on the download button it d Switch the instrument to the SND position to initiate the communications port and start the download The download may take a few seconds to start if you have the Auto Detect serial port option set in Download Manager properties screen Additional messages may appear to allow MIT to communicate These should be accepted e After successful file transfer the MIT430 MIT485 will display End obt J End f The MIT430 MIT485 should be switched to OFF 31 www actoolsupply com www actoolsupply com 17 Battery and fuse replacement refer to Figure 18 100 IHD 75 MII 1 50 HIT l s 25 l C p 0 I Figure 17 17 1 Battery condition and replacement The battery condition indicator is displayed at all times that the instrument i
20. lsupply com www actoolsupply com 21 Accessories Includes accessories 2 wire test lead set and crocodile clips SP5 Remote switch probe not MIT400 405 40X 480 Owner s information CD Calibration certificate Quick start guide Rubber boot Instrument case Additional in MIT430 and MIT485 Download Manager CD Optional accessories and replacements Fused 2 wire test lead set and crocodile clips Bluetooth Module qualifications details Bluetooth identifier B02872 QPLN Reference Q 11406 WT 12 SGS Contains Transmitter Module FCC ID QOQWT 12 The Bluetooth word mark and logo are owned by the Bluetooth SIG Inc and any use of such marks by Megger is under license 6220 813 6220 812 6172 965 5270 923 6231 802 5410 420 6111 442 6220 789 www actoolsupply com 37 www actoolsupply com 22 Repair and Warranty The instrument contains static sensitive devices and care must be taken in handling the printed circuit board If an instrument s protection has been impaired it should not be used but sent for repair by suitably trained and qualified personnel The protection is likely to be impaired if for example it shows visible damage fails to perform the intended measurements has been subjected to prolonged storage under unfavourable conditions or has been subjected to severe transport stresses Megger operate fully traceable calibration and repair facilities ensuring your instrument continue
21. p 3 Press for Previous Next Step 4 Press to view result Step 1 Switch to RCL ap Ge i Megger mina P mi Figure 14 Recall test results 1 Turn the instrument ON by rotating the selector switch to the recall RCL position 2 Observe the latest unique test result identification number displayed Where no results have previously been stored the display will indicate this by three dashes 3 Press OK to display last stored result or select the particular test result identification number by using the A and F buttons then press OK to select 4 The test result will be displayed Additional information stored with the test result may be viewed using the relevant button For example on insulation test uA can be recalled using the wA S V key The TRMS key will operate on voltage results 15 3 Pl and DAR recall Additional recall information is available if the result stored was a PI or DAR test as the result is a ratio of two measured values Figure 15 illustrates the displays which will be shown during a Dialectic Absorption Ratio DAR test result recall 2A www actoolsupply com www actoolsupply com Screen B t2 Screen A DAR a i T THH Screen C tl Step 2 Screen D VOLTAGE Select result Step 1 Switch to RCL Figure 15 DAR recall results To recall a PI or DAR result 1 Rotate the selector switch to the recall RCL position and
22. r MIT40X refer to section 10 1 Connect the test probes to the isolated circuit under test Zs Turn the instrument ON by rotating the selector switch to the desired test voltage 50 V 100 V 250 V 500 V or 1 kV 3 Press and hold the TEST button to start the test 4 The insulation resistance value in both analogue and digital form is displayed together with the actual test voltage displayed on the secondary display see Screen A of figure 6 5 The insulation test can be locked on by pressing the lock button L whilst holding down the TEST button To disable lock press the TEST button or lock L button 6 By pressing the uA V s button the leakage current can be displayed see Screen B Not available on the MIT400 or MIT480 ys Release the TEST button before removing the test leads to enable the instrument to discharge the circuit under test If the display shows VOLTS wait until it reaches zero 8 On completion of testing switch to the OFF position Alternatively auto shut off operates after 15 minutes of inactivity 13 www actoolsupply com ____ _ Screen B p nin I MA A Step 1 www actoolsupply com 00 _ Connect the test leads D Step 4 Test result and actual test voltage Step 3 Press TEST and hold Step 7 Release TEST button Step 2 Select test voltage Step 8 Switch off 9 2 Insulation resistance testing timed modes t PI and DAR
23. rt the lock C symbol flashing This indicates a value has been changed but not saved 2 Save new limit by pressing the Lock L button Saved changed are effected when the Screen Lock symbol stops flashing and disappears www actoolsupply com www actoolsupply com 15 Saving recalling and downloading test results MIT420 MIT430 MIT481 and MIT485 15 1 Saving test results After completing any test the result remains displayed on the screen for one minute During this time the result may be saved in memory and recalled later Step 1 Screen A result Step 2 Press STORE Figure 13 Test results storage Procedure for storing test results refer to Figure 13 1 After completion of a particular measurement ensure the test result is displayed on the instrument display refer to Figure 13 Screen A The test result will remain displayed for one minute during which time the result may be stored 2 Press STORE to record the test result A unique identification number is allocated to each test result which is displayed for 15 seconds before returning to the test result 3 Result is now stored 15 2 Test results recall MIT420 MIT430 MIT481 and MIT485 All stored test results may be recalled to the screen www actoolsupply com www actoolsupply com Procedure for recalling stored test results refer to Figure 14 al Memory se o pA an indicator Step 2 Test result number Units of stored test Ste
24. s TEST and hold Step 6 Press TEST to abort if required Step 2 Range selection Figure 7 Insulation resistance timed modes 1 Connect the test probes to the isolated circuit under test Zz Turn the instrument ON by rotating the selector switch to the required test voltage position either 50 V 100 V 250 V 500 V or 1 kV 3 Select the timed test t by pressing PI DAR t function button repetitively until the desired function is displayed Note the test type defaults to insulation resistance when the range switch is moved See figure 7 screens B C amp D 15 www actoolsupply com www actoolsupply com 4 Once selected press and hold the TEST button to start the test 5 Use the LOCK button only for standard insulation resistance tests if required PI DAR and t automatically lock the test on for the duration of the test 6 For timed tests the test will run for the time period defined in Set up see Set up procedures 14 To abort the test early press TEST or LOCK Ly buttons Ta At the end of the tests the voltage will be discharged b Insulation resistance testing PI and DAR not MIT400 MIT405 and MIT480 The PI test will run for a period of 10minutes After one minute a test result is stored t1 After 10 minutes a second test result is stored t2 The resultant ratio is then displayed on the screen The same procedure applies for the DAR timed tests however the
25. s shown If outside UK USA please consult your distributor for the most convenient Service Organisation www actoolsupply com
26. s switched on as below 100 75 and 50 Replacement batteries type is 5 x LR6 AA 1 5 V Alkaline or 5 x 1 2V NiMH Note NiMH or NiCAD rechargeable batteries show a lower charge than Alkaline batteries and may not give much warning before becoming exhausted Procedure to replace batteries Warning Do not switch the instrument on with the battery cover removed 1 The rear cover must not be opened if the test leads are connected 2 Switch off the instrument and disconnect the instrument from any electrical circuits 3 To avoid the possibility of electric shock do not press the test button or touch the fuse when changing batteries 4 To remove the rear cover remove the screws from the rear of the battery cover lift the cover off 5 Remove the dead cells and refit new batteries observing the correct polarity as marked on the battery compartment 6 Replace the cover and retaining screws Warning Incorrect battery cell polarity can cause electrolyte leakage or damage the instrument If the battery condition indicator does not show a full charge a cell may be reversed Note Battery cells should not be left in an instrument which may remain unused for an extended period www actoolsupply com www actoolsupply com 17 2 Blown fuse indicator Figure 21 shows the blown fuse indicator which operates on continuity Q range The symbol will operate if the fuse has blown after contact with a live supply has occurred
27. s to provide the high standard of performance and workmanship you expect These facilities are complemented by a worldwide network of approved repair and calibration companies which offer excellent in service care for your Megger products Returning your product to Megger UK and USA service centres 1 When an instrument requires recalibration or in the event of a repair being necessary a Returns Authorisation RA number must first be obtained from one of the addresses shown You will be asked to provide the following information to enable the Service Department to prepare in advance for receipt of your instrument and to provide the best possible service to you Model e g MIT400 Serial number e g 61110357050305 1234 Reason for return e g calibration required or repair Details of the fault if the instrument is to be repaired 2 Make a note of the RA number A returns label can be emailed or faxed to you if you wish 3 Pack the instrument carefully with plenty of padding but no pressure on window or glass 4 Ensure the returns label is attached or that the RA number is clearly marked on the outside of the package and on any correspondence before sending the instrument carriage paid to Megger 5 You may track the progress of your return on line by accessing the Service Support facilities at www megger com Approved Service Centres A list of Approved Service Centres may be obtained from the UK addres
28. t value Setup maximum continuit EPA a xi inui a circuit ane ee cere Pa 200 mA Sets low threshold for insulation test buzzer in Mohms Buzzer O85 ly 25 10 MIT420 gt I 0 5 MQ sounds is result is more than set 20 MQ MIT40X value Timer for insulation test Test will count down to 0 seconds 1 yO uteg l l l l l in 1 minute MIT410 gt Test is active during minute l increments MIT481 gt countdown d Setup units for distance a m meters ft All measurement feet C Setup cable capacitance in nF 50 nF 40nF to 60nF MIT4813 distance measurement InF increments 10V to 100V Setup insulati ist TE etup insulation resistance iov 1 volt MIT40X voltage increments b Bluetooth MIT430 Paring setup MIT485 UZ Oc SC nS t iS AB t 21 www actoolsupply com www actoolsupply com Lock symbol n ble Te Step 2 Press Step 3 Press and hold Step 4 Save settings Step 1 Figure 12 Set up Setup procedure refer to Figures 12 1 Turn the instrument ON by rotating the selector switch to the Setup position The firmware version is displayed prior to the first setting BUZ 2 Press the TEST button repeatedly to select the desired parameter BUZ Loc ISC etc 3 When the function to be changed is displayed press and hold the TEST button to change the value Each subsequent press increments the limit Holding down the TEST button will automatically increment 4 Changing a value will sta
29. test duration is 60 seconds with the first result t1 taken at 30 seconds and the second at 60 seconds t2 Results can be recalled to screen using the uA v s W keys Note DO NOT press PI DAR t A as it will change the test mode and erase the current results Figure 8 illustrates the t1 and t2 screens Screen B Screen A Resistance Results displayed at T1 displayed at the end of timed test oe UU Time interval tl i Use to display Aing t1 t2 and voltage Press TEST vo 16 to repeat the o z a iDO WU u If selector switch is moved test defaults to INS mode Figure 8 Insulation test timed mode 16 www actoolsupply com www actoolsupply com 10 MIT40X testing The MIT40X has a selectable insulation test range from 10 V to 100 V in 1 V increments The test voltage selected is the nominal test voltage e g If 10 V is selected the actual voltage at the probe tip will be within the stated tolerance of 1 V The MIT40X is supplied with a default setting of 10 V This can be adjusted in the setup procedure between 10 V and 100 V To adjust the insulation test voltage refer to the Setup procedure Testing is performed in exactly the same manner as a standard insulation test in section 9 1 above 17 www actoolsupply com www actoolsupply com 11 Continuity testing 2 and buzzer Test procedure refer to Figure 9 Continuity test Contact
30. the circuit to be tested has been fully disconnected and is securely isolated from the supply prior to using the instrument www actoolsupply com www actoolsupply com 6 General operating instructions Safety note If greater than 25 V appears on the circuit under test the instrument will default to a voltage measurement and display the supply voltage On supply voltages over 50 V the instrument will be prevented from performing an insulation test protecting your instrument from damage Note This limit is increased on MIT480 MIT481 and MIT485 to 75 V but a warning buzzer will indicate voltages above 50 V Use extreme care when using or measuring voltages above 30 V particularly in high energy systems Fused test leads are available as an optional accessory for local situations where increased protection is required Hazardous voltages can exist on the insulation test range all the time the TEST button is locked down www actoolsupply com www actoolsupply com 6 1 General functions Black Test lead connection gt Annen inihain os M LCD screen re ADF om Test button and lead null Insulation lock button Insulation test ranges OFF posito Resistance range Capacitance uF n u A gt uP ir TV TVA Or Se GAMA a gt ar Figure 3 Main features MIT430 shown Insulation PI test DAR test or timed test button Store last button TRMS DC bu
31. tton Red test lead or switched probe Function e e oo buttons Battery internal fuse access panel at rear Voltage range Result recall and transfer Up down buttons uA s V button Next button Buzzer on off Backlight button Test button Figure 4 Function buttons MIT430 shown www actoolsupply com www actoolsupply com 6 2 LCD Display Multifunction Auxiliary digital display analogue display Continuity indicator Units of parameters on auxiliary display Battery condition mie ry indicator Lock indicator 10001 Audible alarm indicator Warning refer ns it user manual 88 Pn BAB a A TRMS __TRMS indicator Fuse blown nano TES M nF T nits of parameters on Out of range MVmuA main display indicator Lead null ONE Figure 1 LCD display 6 3 Voltage warning If the voltage is greater than 25 V the meter automatically displays the voltage For MIT400 MIT405 MIT410 MIT420 MIT430 and MIT40X instruments if a voltage greater than 50V exists testing will be automatically inhibited and voltage measurement will be displayed For MIT480 MIT482 MIT485 instruments if a voltage greater than 75 V exists testing will be automatically inhibited and a voltage measurement will be displayed Voltages higher than 50 V will be indicated by a warning buzzer In continuity mode if a voltage greater than 25 V exists testing will be automatically inhibit
32. www actoolsupply com MIT400 Series Insulation and continuity testers Megger MIT400 EN MIT 400 EN Insulation Resistance Continuity Tester Megger MIT40X EN MIT 40X EN Insulation Resistance Continuity Tester Megger MIT410 EN MIT 410 EN Insulation Resistance Continuity Tester Megger MIT410 TC2 MIT 410 TC2 Insulation Resistance Telecom Tester Megger MIT415 EN MIT 415 EN Insulation Resistance Continuity Tester Megger MIT420 EN MIT 420 EN Insulation Resistance Continuity Tester Megger MIT430 EN MIT 430 EN Insulation Resistance Continuity Tester Megger MIT430 TC2 MIT 430 TC2 Insulation Resistance Telecom Tester Megger MIT480 EN MIT 480 EN Insulation Resistance CATV Telecom Tester Megger MIT481 EN MIT 481 EN Insulation Resistance CATV Telecom Tester Megger MIT485 EN MIT 485 EN Insulation Resistance CATV Telecom Tester USER GUIDE www actoolsupply com www actoolsupply com USER GUIDE CONTENTS 1 Introduction 2 A Safety Warnings 3 Symbols used on the instrument 4 General Description Unpacking the carton Carton contents all instruments D Preparations for use all instruments Batteries Preliminary test lead check 6 General operating instructions General functions LCD Display Backlight operation 7 Test lead connections Standard test leads SP5 Switched probe not MIT400 MIT480 and MIT40X 8 AC DC voltage and frequency measurements 9 Insulation resistance testing general Standard insulation resistance testing Insulation res

Megger MIT40X-EN Manual

Contents

Download Pdf Manuals

Related Search

Related Contents