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MI 3205 TeraOhm XA 5kV

Maintenance

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7 Maintenance

Unauthorized persons are not allowed to open the TeraOhm XA 5kV instrument. There
are no user replaceable components inside the instrument, except the battery.

7.1 Batteries insertion and replacement

Battery is stored in the battery compartment of the instrument casing under the battery
cover (see Figure 7.1). In case of defective battery please note the following:

Step 1

Turn off the power, disconnect any measurement accessories and mains supply
cable connected to the instrument before opening the battery cover to avoid
electric shock.

Step 2

Remove the battery cover (see Figure 7.1) !

Figure 7.1:

Battey cover screws

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Содержание MI 3205

Страница 1: ...TeraOhm XA 5 kV MI 3205 Instruction manual Version 1 1 Code No 20 752 446...

Страница 2: ...rel metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2015 METREL No part o...

Страница 3: ...result line 20 3 4 6 Graphical presentation of measured data 20 3 4 7 Backlight operation 20 4 Main menu 21 4 1 Instrument Main menu 21 4 2 Custom tests 22 4 2 1 Creating custom test 22 4 3 Memory me...

Страница 4: ...ng options 36 5 4 1 The purpose of averaging 36 5 4 2 Example of averaging 37 5 5 Measurement menu 38 5 6 Insulation Resistance Measurement 39 5 6 1 Set Limit 41 5 7 Diagnostic test 42 5 7 1 Dielectri...

Страница 5: ...DD Graph R t Adjustable test voltage 50 V 5 kV 50 V and 100 V step Programmable timer Automatic discharge of test object after completion of measurement Capacitance measurement Input AC current noise...

Страница 6: ...could be impaired Read this Instruction manual carefully otherwise the use of the instrument may be dangerous for the operator the instrument or for the equipment under test Do not use the instrument...

Страница 7: ...ill be displayed Do not connect test terminals to an external voltage to prevent any damage to the test instrument Handling with capacitive loads Note that 40 nF charged to 1 kV or 8 nF charged to 5 k...

Страница 8: ...e power supply is connected to the instrument The power supply socket is shown in Figure 2 2 Internal circuit controls CC CV charging and assures maximum battery lifetime Nominal operating time is dec...

Страница 9: ...of the charging current 2 2 1 Precharge On power up if the battery voltage is below the VLOWV threshold the charger applies 1 8 of the charging current to the battery The precharge feature is intended...

Страница 10: ...e threshold typ 60 C THTF Hot temperature threshold typ 75 C The charger continuously monitors battery temperature To initiate a charge cycle the battery temperature must be within the TLTF to THTF th...

Страница 11: ...ately 50 of capacity at least once every 6 months Store the instrument at temperatures between 5 C and 20 C Transportation Always check all applicable local national and international regulations befo...

Страница 12: ...mblies Scope of the insulation resistance test alternative method for verification of dielectric properties by insulation resistance measurement Description a d c test voltage 500 V is applied to the...

Страница 13: ...operator s panel Keypad Section 1 START STOP Start or stop measurement 2 ON OFF Switches the instrument power on or off The instrument automatically turns off 15 minutes after the last key was presse...

Страница 14: ...12 13 GUARD Guard input terminals 14 Rx Negative high voltage output terminal Power and Communication Section 19 C7 Input power supply socket C7 18 USB USB communication port standard USB connector ty...

Страница 15: ...voltage shielded cable because shielded cable provides higher accuracy and immunity to disturbance of measurements that can occur in industrial environments High voltage shielded test leads with High...

Страница 16: ...n with the largest font During measurement campaign this result is refreshed every few seconds When the measurement is completed result is hold on screen until new measurement is started Bar graph Gra...

Страница 17: ...Test DAR Show the Dielectric Absorption Ratio When the measurement is completed result is hold on screen until new measurement is started appears only in Diagnostic Test PI Show the Polarization Inde...

Страница 18: ...voltage time mm ss step 1s max time 99 min Tend Allows user to set the constant end test voltage time mm ss step 1 s max time 99 min Ustart Allows user to set the desired start test voltage Uend Allow...

Страница 19: ...emory is full graph logging is disabled Measurement result is within defined limits Measurement result is out of defined limits 3 4 4 Battery time and communication indication These symbols indicate t...

Страница 20: ...r position Note Averaging in measurement result line is disabled during measurement campaign in all functions regardless of settings 3 4 6 Graphical presentation of measured data Figure 3 8 Graph scre...

Страница 21: ...s Custom tests Memory menu Settings menu and Help menu Figure 4 1 Instrument Main menu Keys Select one of the following menu items Measurements See chapter 4 5 Custom tests See chapter 4 2 Memory menu...

Страница 22: ...ction ESC Returns to the Main menu 4 2 1 Creating custom test The user has an option to save any custom made parameter settings Simply enter the desired measurement edit the test parameters end press...

Страница 23: ...ain menu 4 3 1 Saving results After the completion of a test the results and parameters are ready for storing By pressing the MEM key the user can enter storing menu Figure 4 5 Storing Menu Keys Selec...

Страница 24: ...ECT DUT LINE Decrees or increase the parameter SELECT Recalls result in selected location ESC Returns to the Memory menu Keys in Recall result screen Toggles between the saved results under selected O...

Страница 25: ...ng individual measurements ESC Returns to the Memory menu Keys in measurements field for deleting individual measurements Select measurement to be deleted SELECT Enters Delete confirmation screen ESC...

Страница 26: ...tings menu different parameters and settings of the instrument can be viewed or set Figure 4 10 Settings menu Keys Select the setting to adjust or view Language instrument language Initial Settings fa...

Страница 27: ...on and restart of the instrument if YES is selected ESC Returns to Main menu without changes Note Applying the initial settings will re boot the instrument 4 4 3 Time selection In this selection the t...

Страница 28: ...When using the instrument in a cold environment contrast level should be increased 4 4 7 Warning sound In this selection the Warning sound can be set When enabled the Warning sound will beep when hig...

Страница 29: ...the charging state of the high voltage generator Break down is active if output voltages higher or equal then 1kV are set 4 4 10 Instrument info In this menu the following instrument data is shown fir...

Страница 30: ...ts interfere with measurements using AC or pulsed voltages DC is mostly used for insulation resistance measurement tests In this type of test the voltage is defined by the appropriate product applicat...

Страница 31: ...surface Itest Guard IPI ICiso IRiso IRiss Itest Figure 5 1 Insulating material where Riss1 and Riss2 Surface resistivity position of optional guard connection Riso Actual insulation resistance of mate...

Страница 32: ...ctive parts etc is increased and the overall breakdown voltage is reduced Excessive humidity and pollution have an important role especially in the case of mechanical stress The test voltage steps are...

Страница 33: ...cceptable values for motor insulation IEEE 43 Class A 1 5 Class B 2 0 Class F 2 0 Class H 2 0 5 2 3 2 Dielectric Discharge DD An additional effect of polarization is the recovered charge from Cpi afte...

Страница 34: ...examples for DC withstanding test voltage values Standard only sample values Voltage EN IEC 61010 1 CAT II 300 V mains circuits basic insulation 2100 V EN IEC 61010 1 CAT II 300 V mains circuits reinf...

Страница 35: ...test object so as to collect most of the unwanted leakage current see the Figure below IL IL IL Ut Ut IA IA IM IM A A OUT OUT OUT OUT GUARD Figure 5 2 Connection of GUARD terminal to measured object w...

Страница 36: ...e terms the averaging smooth s the measured There are various sources of disturbance AC currents at the mains frequency and its harmonics switching transients etc cause the results to become unstable...

Страница 37: ...veraging Capacitive test object 200 nF Insulation Resistance Measurement Test parameters Un 5 00 kV Timer1 5 00 min Figure 5 3 Insulation Meas AVG _ _ _ Figure 5 4 Insulation Meas AVG 5s Figure 5 5 In...

Страница 38: ...5 5 Measurement menu In the Measurement menu 4 different measurements and tests can be selected Figure 5 7 Measurement menu Keys Selects measurement or test SELECT Enters selected measurement functio...

Страница 39: ...V and 100 V 1 kV 5 kV Timer1 Duration of measurement mm ss step 1 s max time 99 min Hi Lim Limit value selection OFF 0 50 M 1 0 T AVG Additional averaging of the result value OFF 5 10 30 60 Keys Selec...

Страница 40: ...set timer to run out Wait for the object under test to discharge Store the result by pressing MEM key optional Figure 5 9 Example of Insulation resistance measurement result Figure 5 10 Example of Ins...

Страница 41: ...lt is validated only if it is within the given limit Limit indication is shown by the bar Bar graph marker see Figure 5 10 Figure 5 11 Limits marker Message window Measurement result is within defined...

Страница 42: ...V Timer1 Delay for starting DAR measurement mm ss step 1 s max time 99 min Timer2 Delay for starting PI measurement mm ss step 1 s max time 99 min Timer3 Duration of measurement mm ss step 1 s max tim...

Страница 43: ...it for the set timers to run out Wait for the object under test to discharge Store the result by pressing MEM key optional Figure 5 13 Example of Diagnostic test result Figure 5 14 Example of Diagnost...

Страница 44: ...se attention to the capacitance of the test objects It has to be charged up in the first time section 30 s Approximate maximum capacitance using V s F U t C 10 3 max Where t period of first time unit...

Страница 45: ...fter the completion of the Insulation Resistance measurement Typically the insulation material is left connected to the test voltage for 1 30 min and then discharged before the DD test is carried out...

Страница 46: ...sound insulation Warnings Refer to Warnings chapter for safety precautions Do not touch the test object during the measurement or before it is fully discharged Risk of electric shock Notes Consider d...

Страница 47: ...he field to be changed Modifies selected field SELECT Toggles between graph view and results view Graph must be enabled in the Settings menu MEM Enters Save custom test menu Saves results if present S...

Страница 48: ...Do not touch the test object during the measurement or before it is fully discharged Risk of electric shock Notes Consider displayed warnings when starting the measurement A high voltage warning symbo...

Страница 49: ...1 kV and 100 V 1 kV 5 kV Uend Start test voltage step 50 V 50 V 1 kV and 100 V 1 kV 5 kV Tramp Duration of the test ramp voltage mm ss step 1 s max time 99 min Tstart Duration of the start test voltag...

Страница 50: ...D End test voltage TRAMP Duration of test ramp TSTART Duration of starting test voltage TEND Duration of test voltage after reaching UEND value Notes Breakdown is detected when the measured current re...

Страница 51: ...luetooth How to transfer stored data RS 232 communication connect a PC COM port to the instrument RS 232 terminal using the RS 232 serial communication cable USB communication connect a PC USB port to...

Страница 52: ...and replacement Battery is stored in the battery compartment of the instrument casing under the battery cover see Figure 7 1 In case of defective battery please note the following Step 1 Turn off the...

Страница 53: ...with Manufacturers guidelines and in accordance with Local and National Authority guidelines Note Operator does not need to disconnect the instrument from mains supply after the full recharging perio...

Страница 54: ...based on petrol or hydrocarbons Do not spill cleaning liquid over the instrument 7 3 Periodic calibration It is essential that the test instrument is regularly calibrated in order that the technical...

Страница 55: ...tance 400 k 5 Input AC current noise rejection 1 mA 300 V 4 mA max Additional filtering options Off 5s 10s 30s 60s Moving Average Resistance Measuring range Resolution Accuracy 0 01 9 99 M 10 k 5 of r...

Страница 56: ...5 99 k 10 Table 8 3 Voltage measurement ranges and accuracy Capacitance Measuring range F Resolution F Accuracy 20 999 n 1 n 5 of reading 3 digits 1 00 9 99 10 n 10 0 50 0 100 n Table 8 4 Capacitance...

Страница 57: ...10 100 Rx M U kV 5 kV 2 5 kV Figure 8 8 Generator capability vs resistance Notes All data regarding accuracy is given for nominal reference environment condition measurements The error in operating c...

Страница 58: ...und Visual warning yes Display 320 x 240 dots matrix display with backlight Reference conditions Reference temperature range 25 C 5 C Reference humidity range 40 RH 60 RH Operation conditions Working...

Страница 59: ...r the selected function or to select the active parameter to be set KEY UP Select an option upward downward KEY DOWN Select an option upward downward KEY LEFT Decrease increase the selected parameter...

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