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MI 3200 TeraOhm 10 kV

Measurements

In this test, the insulation is measured in five equal time periods with test voltages from
one fifth of the final test voltage up to full voltage (see the

Fig. 23

). This function

illustrates the relationship of a materials Insulation resistance and its applied voltage.

Measurement procedure:

Connect the test leads to the instrument and to the test object.

Press

the

START/STOP

key to start the measurement.

Wait until set timer runs out, (the result will be displayed).

Wait for the object under test to discharge.

The results can be saved by pressing the

MEM

key twice, see the chapter 6.1. Store,

Recall and Clear Operation.

0.2U

0.4U

0.6U

0.8U

Fig. 23. Step-up test voltage

Legend of displayed symbols:

STEP VOLTAGE

Name of selected function

Fil0 (Fil1, Fil2, Fil3)

Filter type enabled, see the chapter 5.3.
Configuration

5000V

Set test voltage – step 125 V

U=5308V

Actual test voltage – measured value

I=266nA

Actual test current – measured value

19.9G



Insulation Resistance –

result

C=1.2nF

Capacitance of measured object

Tm:05min 00s

Actual test duration

R1000V=20.0G



Last result of 1

step

R2000V=20.0G



Last result of 2

step

R3000V=20.0G



Last result of 3

step

R4000V=19.9G



Last result of 4

step

R5000V=19.9G



Last result of 5

step

Содержание MI 3200

Страница 1: ...TeraOhm 10 kV MI 3200 User Manual Version 4 0 Code No 20 751 097...

Страница 2: ...http www metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and interference causing equipment regulations 2015 Metrel No...

Страница 3: ...ion 10 4 2 1 Configuration 11 4 2 2 Setup 12 5 Measurements 14 5 1 Generally Information about High DC voltage testing 14 5 2 Guard terminal 17 5 3 Filter options 18 5 4 Voltage measurement 19 5 5 Ins...

Страница 4: ...voltage range Programmable timer 1 min up to 30 min per step Polarization Index PI Dielectric Absorption ratio DAR and Dielectric Discharge DD ratio PI RINS t2 RINS t1 DAR R1min R15s DD Idis1min C U W...

Страница 5: ...ecifications 2 2 Operator s Panel The operator s panel is shown in the figure below Fig 1 Fig 1 Front panel Use original test accessories only Max allowed external voltage between test terminals and g...

Страница 6: ...stance test terminal OUT 15 Screw unscrew to replace the batteries 16 Galvanic separated USB connector to connect the instrument to PC 17 Distributor label or could be blank 18 Galvanic separated RS 2...

Страница 7: ...ielded 2 4 2 High voltage shielded test leads with High voltage alligator clips Application notes These test leads is designed for diagnostic testing of insulation Insulation ratings High voltage bana...

Страница 8: ...risk of electric shock while dealing with hazardous voltages Do not connect the test equipment to a mains voltage different from the one defined on the label adjacent to the mains connector otherwise...

Страница 9: ...est equipment In rare cases internal fault the test equipment can behave in an uncontrolled manner LCD blinking freezing not responding to keys etc In this case consider the test equipment and the tes...

Страница 10: ...nd instrument is ready for normal operation Auto calibration prevents the reduction in accuracy when measuring very low currents It compensates the effects caused by ageing temperature and humidity ch...

Страница 11: ...easuring mode When the instrument is performing a test Backlight operation battery powered instrument After turning the instrument ON the LCD backlight is automatically turned ON It can be turned OFF...

Страница 12: ...IC TEST functions according to the nominal voltage Unominal See additional explanation in chapter 5 6 Table 1a Parameters in Configuration menu 4 2 2 Setup The setup function enables the selection and...

Страница 13: ...LCD contrast Time Set real time hour minute Date Set current date day month year Com Port RS 232 2400 RS 232 4800 RS 232 9600 RS 232 19200 USB 115000 Set communication mode and rate Language Set langu...

Страница 14: ...ests In this type of test the voltage is defined by the appropriate product application group This voltage is lower than the voltage used in the withstanding voltage test so the tests can be applied m...

Страница 15: ...tance Ciso to be charged up Sometimes it is required to take ambient temperature into account and adjust the result for a standard temperature of 40 C If surface leakage currents interfere with the me...

Страница 16: ...s not always valid Refer to Metrel s handbook Insulation Testing Techniques for more information General applicable values PI value Tested material status 1 to 1 5 Not acceptable older types 2 to 4 ty...

Страница 17: ...1 2120 V Humidity and insulation resistance measurements When testing outside the reference ambient conditions the quality of the insulation resistance measurements can be affected by humidity Humidi...

Страница 18: ...ment has two guard terminals to allow easy connection of shielded measuring leads 5 3 Filter options Filters are built in to reduce the influence of noise on measurement results This option enables mo...

Страница 19: ...point is to filter the measured current Note Any of the selected filter options increases the settling time with Fil1 to 60 s Fil2 to 70 s and Fil3 to 120 s It is necessary to pay close attention to t...

Страница 20: ...states initial state and state with results after the completion of the measurement The Fig 10 shows states when Graph R t is disabled Initial display Display with results Fig 10 Insulation Resistance...

Страница 21: ...of selected function Off fil0 Fil1 Fil2 Fil3 Filter type enabled see the chapter 5 3 Configuration 5000V Set test voltage U 5323V Actual test voltage measured value I 266nA Actual test current measure...

Страница 22: ...er 5min 00s Duration of the measurement Timer on off ON ON timer enabled OFF timer disabled Time1 01min 00s Time to accept and display first Rmin and Rmax results Graph R t ON Enable Disable Graph R t...

Страница 23: ...of Graph R t is equal to the value of Timer The Timer value could be very long up to 100 minutes so the Special automatic decimation algorithm is use to write the Graph R t to the LCD The cursors of...

Страница 24: ...t disabled The Fig 16 shows states when Graph R t is enabled When Graph R t is enabled you can simple switching initial state and state with results after the completion of the measurement between nu...

Страница 25: ...ed up in the first time section 15s Approximate maximum capacitance using V s F U t C 10 3 max where t period of first time unit e g 15s U test voltage To avoid this problem increase the DIAG Starting...

Страница 26: ...useful maintenance tests of an insulating material DIELECTRIC DISCHARGE TESTING DD DD is the diagnostic insulation test carried out after the completion of the Insulation Resistance measurement Typic...

Страница 27: ...R10min 10 5G Resistance value measured after set time 3 DAR 1 67 DAR as ratio of R1min R15s PI 1 21 PI as ratio of R03 R02 DD __ DD result Notes A high voltage warning symbol appears on the display d...

Страница 28: ...Fig 18 shows the timer relationships 0 Time1 Time2 Time3 t Start R15s R01min DAR R03min PI Stop if enabled DD Time1 Time2 Time2 Time3 Fig 18 Timer relations Enable Disable the graph R t and Set up th...

Страница 29: ...alue of Timer 3 The Timer value could be very long up to 100 minutes so the Special automatic decimation algorithm is use to write the Graph R t to the LCD The cursors of the Graph R t could be activa...

Страница 30: ...t enabled The Fig 22 shows states when Graph R t is enabled When Graph R t is enabled you can simple switching initial state and state with results after the completion of the measurement between nume...

Страница 31: ...arge The results can be saved by pressing the MEM key twice see the chapter 6 1 Store Recall and Clear Operation 0 0 2U 0 4U 0 6U 0 8U U U T 2T 3T 4T 5T t Fig 23 Step up test voltage Legend of display...

Страница 32: ...parameter adjustments by pressing either the ESC or the START STOP key to run the measurement directly The settings displayed last will be saved Fig 24 Set up menu in Step Voltage Test Legend of disp...

Страница 33: ...age testing of high voltage device e g transient suppressors and b DC withstanding voltage test for insulation coordination purposes Both functions require breakdown current detection The test voltage...

Страница 34: ...I 0 002mA Actual test current measured value tm 01min 00s Timer information Measuring procedure Connect the test leads to the instrument and to the measured object Press the START STOP key to start t...

Страница 35: ...lect the parameter line to be set using the and keys Adjust the parameter using the and keys or skip to the next sub parameter by pressing the SELECT key Complete the parameter adjustments by pressing...

Страница 36: ...key If graph R t is enabled in the measurement it will be automatically saved with the measurement To recall stored result Highlight RCL and confirm by pressing the MEM key The last stored result will...

Страница 37: ...er of stored result Date Time Diagnostic test Function name Last measured insulation resistance Set test voltage Actual test voltage measured value Actual test current measured value Capacitance of th...

Страница 38: ...2 Transferring Data to a PC Stored results can be transferred to a PC A special communication program TeraLink PRO has the ability to identify the instrument and download the data How to transfer the...

Страница 39: ...ns and at end the middle batteries The battery cover has to be placed and fixed back Connect the instrument to the mains power supply for 20 hours to fully charge batteries Typical charging current is...

Страница 40: ...hen the others see the Fig 31 Insert the batteries correctly see Fig 31 otherwise the test instrument will not operate and battery may be discharged To easy insert batteries to battery holder first in...

Страница 41: ...or hydrocarbons Do not spill cleaning liquid over the instrument 7 4 Calibration It is essential that all measurement instruments be regularly calibrated For occasional daily use we recommend an annu...

Страница 42: ...digits 1 00 9 99 M 10 k 10 0 99 9 M 100 k 100 999 M 1 M 1 00 9 99 G 10 M 10 0 99 9 G 100 M 100 999 G 1 G 1 00 10 00 T 10 G 15 of reading 3 digits Full scale value of insulation resistance is defined...

Страница 43: ...01 5 of reading 2digits 10 0 100 0 0 1 5 of reading Polarization index PI Display range PI Resolution Accuracy 0 01 9 99 0 01 5 of reading 2 digits 10 0 100 0 0 1 5 of reading Dielectric discharge te...

Страница 44: ...009 1 A 3 of reading 3 digits 0 01 5 50 10 A 3 of reading Voltage Voltage AC or DC Display range External Voltage V Resolution Accuracy 0 600 1 V 3 of reading 4 V Frequency of external voltage Displa...

Страница 45: ...e temperature range 10 30 C Storage temperature range 20 70 C Maximum humidity 90 RH 0 40 C non condensing Nominal reference humidity range 40 60 RH Working nominal altitude up to 3000m Storage nomina...

Страница 46: ...MI 3200 TeraOhm 10 kV Specifications 46 CLOCK Built in Real time clock Displayed permanently and stored as a parameter in combination with the result...

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