GigaOhm 5kV
Contents
1. GigaOhm 5kV MI 3202 User Manual Version 1 5 Code No 20 751 271 32 METREL Distributor Producer METREL d d Ljubljanska 77 SI 1354 Horjul Tel 386 1 75 58 200 Fax 386 1 75 49 226 E mail metrel metrel si http www metrel si C Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2007 2010 Metrel No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL MI 3202 GigaOhm 5 kV Table of contents Table of contents T General introductions a a a 4 1 1 EGAIUI GS insi dedi i E 4 1 2 Applied Standards uou ooi er tdeto aqui adalat atquo aca lede diame usd cubus 4 2 Instrument Description so usbiszbi beet uivapirEbis e busEbnes bond nbl prin e Dewa bUda llb aine be 5 2 1 Instrument Casing ee dete rA LA AE LA M E A 5 22 02 9 2 1 pM re T 5 2 9 MOperalors Panel enccc pi acctonce DU DU tos a 6 ZB GOTO CEN S cus uie ped aoi te ep d tete d etd e tle e d tees 7 But ACCESSOS onion puel oro a a 8 26 JPOSHICAOS a e DN M A AAA RA E DEM M pt dd 8 cuu m A 10 4 Performing measurements eeeeeeeeeeeeseee sense eene nn nnn n annee nannte 12 4 1 Switching on the instrument seeeessssessessseeeeeeeeee nennen 12 M as rem nts2. 1V 3 96 of reading 4 V Frequency of external voltage Display range Hz Resolution Accuracy 0 and 45 65 0 1 Hz 0 2 Hz Note for frequency between 0 and 45 Hz frequency result is shown as for frequency over 65 Hz frequency result is shown as for voltages under 10V frequency result is shown as Input resistance 3 MO 10 96 23 MI 3202 GigaOhm 5 kV Specifications 7 2 General specifications Battery power supply ssssss 7 2 V DC 6 x 1 2 V NiMHC size Mains power supply suseeeeese 90 260 V AC 45 65 Hz 40 VA Over voltage category 300 V CAT III Protection classification double insulation El Measurement category ssssss 600 V CAT IV Pollution degree 2 Degree of protection IP 40 with case closed Dimensions Ww x Tix el oatodse coeno tec tens 31 cm x 13cm x 25 cm Weight without accessories with batteries 3 kg Visual and sound warnings yes Br dC HE LCD segments and analogue scale with backlight ENVIRONMENT CONDITIONS Working temperature range 10 50 C Nominal reference temperature range 10 30 C Storage temperature range 20 70 C Maximum humidity ss ons edo er neta 90 R
3. prepared for normal operation Auto calibration prevents a reduction in accuracy when measuring very low currents It compensates the effects caused by ageing temperature and humidity changes etc A new auto calibration is recommended when the temperature changes by more than fa 1G 300 10G Im BE 1G 10G EH ear i 7006 N Ao 700g an S MM 77 w v NS ML 4 SW i MES gt W iBags e 99 ca A L 1 V E MEM myunA yt I HN ioe gt a e kMGQ Q Evi is X X i i m m i i p UAR RR Fig 7 First introduction Fig 8 Auto calibration state Fig 9 Insulation Mode Note If the instrument detects incorrect an state during the auto calibration the fail icon X will be displayed Possible reasons for out of range conditions are excessive humidity excessively high temperature etc In this case it is possible to perform measurements by press START STOP button again but results could be out of technical specification Mains powered instrument operation If you connect the instrument to the mains supply when the instrument is turned OFF internal charger will begin to charge the batteries but instrument will be remain turned OFF In upper left angle of LCD flashing battery indicator will appear to indicate that the batteries are charging 12 MI 3202 GigaOhm 5 kV Performing measurements Note If batteries are defective or mis
4. similar test equipment Available functions offered by the GigaOhm 5kV Tester e High Insulation Resistance measurement up to 1 TO e Programmable test voltage 250 V 500 V 1 kV 2 5 kV 5 kV e Automatic discharge of tested object after measurement completion e Voltage and frequency measurement up to 600 V AC DC A segment LCD offers easy to read results and all associated parameters Operation is simple and clear the operator does not need any special training except reading and understanding this Users Manual to operate the instrument 1 2 Applied Standards Instrument operation IEC EN 61557 2 Electromagnetic compatibility EMC EN 61326 Class B Safety EN 61010 1 instrument EN 61010 031 accessories MI 3202 GigaOhm 5 kV Instrument Description 2 Instrument Description 2 1 Instrument Casing The instrument is housed in a plastic box that maintains the protection class defined in the general specifications 2 2 LC Display The segment LCD has a backlight and offers easy to read results and all shows all associated parameters See Fig 1 below 0 Fig 1 LC Display Legend ieee peers Battery indicator It indicates condition of the battery In battery charging mode it flashes 2 aici Hazardous Voltage Warning icon It indicates that the voltage higher than 70 V may be present at the test terminals CMS Analogue display 4 Auxiliary digital display Dens Auxiliary units Units for parameters di
5. the cover back in place The Instrument will only work when rechargeable batteries are inside the instrument Nominal power supply voltage is 7 2 V DC Use six NiMH cells with C size dimensions diameter 26 mm height 46 mm See the next figure Fig 15 for correct polarity of batteries POWER SUPPLY gt 6x1 2 V NiMH RECHARGEABLE IEC LR14 Fig 15 Correct inserted batteries Battery cover EEE Screw unscrew to replace the batteries eee Correct inserted batteries Ensure batteries are used and disposed of in accordance with Manufacturers guidelines and in accordance with Local and National Authority guidelines BEFORE REMOVING THE BATTERY COVER h DISCONNECT ALL TEST LEADS AND SWITCH OFF INSTRUMENT HAZARDUS VOLTAGE 20 MI 3202 GigaOhm 5 kV Maintenance 6 4 Cleaning Use a soft cloth slightly moistened with soapy water or spirit to clean the surface of the instrument and leave the instrument to dry totally before using it Notes e Do not use liquids based on petrol or hydrocarbons e Do not spill cleaning liquid over the instrument 6 5 Calibration It is essential that all measurement instruments be regularly calibrated For occasional daily use we recommend an annual calibration to be carried out When the instrument is used continuously every day we recommend calibrating the instrument every six months 6 6 Service For repairing under or out of warranty period con
6. H 0 40 C non condensing Nominal reference humidity range 40 60 RH Nominal altitude sseeesessss up to 2000m AUTO CALIBRATION Auto calibration of measuring system every time after turning power on CONNECTING SYSTEM Two safety banana sockets OUT OUT 5kV CAT I Double Two GUARD banana sockets GUARD 600V CAT IV Double Guard resistance eeessssssssssss 200 kQ 10 96 DISCHARGING Every time after measurement completion Discharging resistance 300 kO 10 24
7. cted to the equipment Do not touch any conductive parts of equipment under test during the test Make sure that the tested object is disconnected mains voltage disconnected before starting the Insulation Resistance measurement Do not touch the tested object whilst testing it risk of electric shock e Incase of a capacitive test object long tested cable etc automatic discharge of the object may not be done immediately after finishing the measurement Please wait discharging message will be displayed HANDLING WITH CAPACITIVE LOADS Note that 40 nF charged to 1 kV or 9 nF charged to 5 kV are hazardous live Never touch the measured object during the testing until it is totally discharged Maximum external voltage between any two leads is 600 V CAT IV environment MI 3202 GigaOhm 5 kV Performing measurements 4 Performing measurements 4 1 Switching on the instrument Auto calibration The instrument is switched ON by pressing the ON OFF key After turning on Fig 7 the instrument first executes the auto calibration Fig 8 Note If batteries are defective or missing and the instrument is powered from mains supply the instrument could not be turn ON Measuring test leads have to be disconnected during auto calibration If not the auto calibration procedure could be false After finishing the auto calibration the pass icon will appeared the instrument goes to the Insulation Mode Fig 9 and is
8. ee didtvastasd ze aducaaventeuaaTesdieuetacdiebataacteuetn civaleveaduaadtae 14 5 1 Generally about DC High voltage testing ssssesssssss 14 52 OUS terminals iiie dar dido ted tete id in edad 15 5 3 Insulation Resistance measurement sssssssssssseeeen 16 54 Voltage mbasureimieliL s eden ine ee tec di eiiiai 17 6 MAING NANCE un iae RD E D XE FUE aa ADU UY LUDERE SE DOLO UN RN DR DUE KA RR REN DUERG 19 6 1 IS POCHON me 19 6 2 Insertion and charging batteries for the first time sssssssesssse 19 6 3 Replacement and charging batteries eesssesessssssss 19 644 ACIS ANIC uet sius dem oia oxi di opa td s data uisa LC US 21 6 5 CallDrallorio c ceo tom ento Oe menia tme 21 6 6 Service E 21 T Specification eT NS 22 7 1 MeaSUreMmeniss oontra dev der donde ko ih re onda du cud CE ee Eur vu SE YES cea dd 22 7 2 General specifications suat ccm ict xm deett ce s dum Mu en Dus deep deut c cU S LEES 24 MI 3202 GigaOhm 5 kV General introduction 1 General introduction 1 1 Features The GigaOhm 5kV Tester is a portable battery mains powered test instrument intended for simple testing of Insulation Resistance by using high test voltages of up to 5 kV It operates on a SIMPLE and CLEAR basis The instrument is designed and produced with the extensive knowledge and experience acquired through many years of dealing with
9. en sockets are connected together inside the instrument Girios Positive Insulation Resistance test terminal OUT Use original test accessories only Max allowed external voltage between test terminals and ground is 600V Max allowed external voltage between test terminals is 600V MI 3202 GigaOhm 5 kV Instrument Description Fig 4 Mains connector Mesrine Mains connector to connect the instrument to the mains supply f Use original mains supply cable only 2 5 Accessories The accessories consist of standard and optional accessories Optional accessories can be delivered upon request See attached list for standard configuration and options or contact your distributor or see the METREL home page http www metrel si 2 6 Test leads The standard length of test leads is 2m optional lengths are 8m and 15m For more details see attached list for standard configuration and options or contact your distributor or see the METREL home page http www metrel si All test leads are made of high voltage shielded cable because shielded cable provides higher accuracy and immunity to disturbance of measurements that can occur in industrial environments MI 3202 GigaOhm 5 kV Instrument Description 2 5 1 High voltage shielded test tips with High voltage alligators cli
10. ent and charging batteries The instrument is designed to be power by rechargeable battery supported by mains supply The LCD contains an indication of battery condition upper left section of LCD When the low battery indication appears Err the batteries have to be recharged connect the instrument to the mains power supply for 14 hours to recharge cells Typical charging current is 300 mA Note e Operator does not need to disconnect the instrument from mains supply after the full recharging period The instrument can be connected permanently Fully charged rechargeable batteries can supply the instrument for approx 4 hours Continues testing at 5kV If the batteries have been stored for a long time it normally takes about 3 charge and discharge cycles for the batteries to regain full capacity Battery cells are stored in the bottom section of the instrument casing under the battery cover see Fig 15 In case of defective batteries please note the following MI 3202 GigaOhm 5 kV Maintenance Turn the power off and disconnect any measurement accessories or mains supply cable connected to the instrument before opening the battery cover to avoid electric shock Remove the battery cover All six cells have to be replaced and they have to be of the same type Insert the batteries correctly see Fig 15 otherwise the test instrument will not operate and the batteries may be discharged Replace the battery cover and fixed
11. es Overall test current liesi Ipit IRiso Iniss Ip polarization absorption current IRiso actual insulation current IrRiss surface leakage current 14 MI 3202 GigaOhm 5 kV Measurements 5 2 Guard terminal The purpose of the GUARD terminal is to lead away potential leakage currents e g surface currents which are not a result of the measured insulation material itself but are a result of surface contamination and moisture This current interferes with the measurement i e the Insulation Resistance result is influenced by this current The GUARD terminal is internally connected to the same potential as the negative test terminal black one The GUARDS test clip should be connected to the test object so as to collect most of the unwanted leakage current see the Fig 11 below Fig 11 Connection of GUARD terminal to measured object where Das Test voltage mc Leakage current resulted by surface dirt and moisture IM Material current resulted by material conditions LO A meter current Result without using GUARD terminal Rins Ut la Ut IM IL incorrect result Result using GUARD terminal Rins Ut la Ut Im correct result It is recommended to use the GUARD connection when high insulation resistance gt 10G Q are measured Note e The guard terminal is protected by an internal impedance 200 KQ e The instrument has two guard terminals to allow easy connection of shielded
12. lution moisture ageing electrical and mechanical stress etc Safety and operational reliability require the regular maintenance and testing of the insulation material to ensure it is kept in good operational condition High voltage tests are used to test insulating materials DC vs AC testing voltage Testing with a DC voltage is widely accepted as being as useful as testing with AC and or pulsed voltages DC voltages can be used for breakdown tests especially where high capacitive leakage currents 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 application group This test voltage is lower than the voltage used in the withstanding voltage test so the tests can be applied more frequently without stressing the test material Electrical representation of insulating material The following figure Fig 10 represents the equivalent electrical circuit of insulating material Itest surface material ris 5 i Rissl od 3 E Ciso zt Guard Riss2 0 TimeSecs 200Secsidiv Fig 10 Riss1 and Riss2 the surface resistivity position of optional guard connection Riso the actual insulation resistance of material Ciso capacitance of material Cpi Rpi represents polarization effects The right figure shows typical currents for that circuit li
13. measuring leads 15 MI 3202 GigaOhm 5 kV Measurements 5 3 Insulation Resistance measurement Select this function by pressing the Q key displays the following states initial state and state with results after the completion of the measurement See Fig 12 below 4G 10G E AOV 700g I 1 umm r P V Q pomme gm zz 1 250V 500V 1kV 2 5kV 5kV Initial display r 4 Display with results l n Fig 12 Insulation Resistance function display states Legend of displayed symbols in Fig 12 INSULATION RESISTANCE Name of selected function 250V Selected test voltage 253 V Actual test voltage measured value 102 MO Insulation Resistance result Bar Analog presentation of result Measurement procedure Connect the test leads to the instrument and to the test object Select INSULATION RESISTANCE mode by pressing the Q key Press the START STOP key and release it continuous measurement will begin Wait until the test result has stabilized then press the START STOP key again to stop the measurement Wait for the object under test until it is discharged Notes A high voltage warning symbol appears on the display during the measurement to warn the operator
14. nnect the test leads to the instrument and to the measured source Press the V key to select voltage mode continuous measurement will automatically start to run Warning e Refer to Warnings chapter for safety precautions 18 MI 3202 GigaOhm 5 kV Maintenance 6 Maintenance 6 1 Inspection To maintain the operators safety and to ensure the reliability of the instrument it is advisable to inspect the instrument on a regular basis Check that the instrument and its accessories are not damaged If any defect is found please consult your service center distributor or manufacturer 6 2 Insertion and charging batteries for the first time Battery cells are stored in the bottom section of the instrument casing under the battery cover see Fig 15 When inserting batteries for the first time please note the following Disconnect any measurement accessories or mains supply cable connected to the instrument before opening the battery cover to avoid electric shock Remove the battery cover Insert batteries correctly see Fig 15 otherwise the test instrument will not operate Replace the battery cover and fixed the cover back in place Connect the instrument to the mains power supply for 14 hours to fully charge batteries Typical charging current is 300 mA When you charge the batteries for the first time it normally takes about 3 charge and discharge cycles for the batteries to regain full capacity 6 3 Replacem
15. of a potentially dangerous test voltage MI 3202 GigaOhm 5 kV Measurements Set up test voltage for Insulation Resistance Fig 13 Adjust test voltage using the lt and gt keys Fig 13 Set up test voltage in Insulation Resistance measurement Legend of displayed symbols INSULATION RESISTANCE Name of selected function Unominal 250V Set test voltage Set up Insulation resistance limit s B S i l value for Insulation Resistance Fig 13 Press the key Q Adjust the limit value using the keys lt and gt uM I Press the key Q again or the key I START to return to into insulation resistance measurement menu Fig 13a Set up Insulation Resistance limit value Legend of displayed symbols INSULATION RESISTANCE Name of selected function Resistance value 1 MQ Selected insulation resistance limit Insulation resistance limit selection range 10 kO 200 MQ No limit selected indication eem Warning e Refer to Warnings chapter for safety precautions 5 4 Voltage measurement Select this function by pressing the V key Voltage measurement is active immediately after entering the function See Fig 14 below 17 MI 3202 GigaOhm 5 kV Measurements 7 200 300 400 9 S ea a a e e a e a a ma m a e a a a a m a a e a a a a a m m a a a e e AV NS 11H S GL I 5g Fig 14 Voltage function display Measurement procedure Co
16. ories if any damage is noticed Consider all generally known precautions in order to avoid risk of electric shock while dealing with hazardous voltages Consider all generally known precautions in order to avoid the risk of electric shock while dealing with electric installations Service intervention or recalibration procedure can be carried out only by a competent and authorized person Only adequately trained and competent persons may operate the instrument A segment LCD offers easy to read results and all associated parameters Operation is simple and clear the operator does not need any special training except reading and understanding this Users Manual to operate the instrument BATTERIES Disconnect all test leads main supply cable and switch the power off before opening the Battery cover Use only NiMh rechargeable batteries C size EXTERNAL VOLTAGES Do not connect the instrument to a mains voltage different from the one defined on the label adjacent to the mains connector otherwise the instrument may be damaged Do not connect test terminals to an external voltage higher than 600 V DC or AC CAT IV environment to prevent any damage to the test instrument MI 3202 GigaOhm 5 kV Warnings WORKING WITH THE INSTRUMENT Use only standard or optional test accessories supplied by your distributor Equipment under test must be switched off i e de energized before test leads are conne
17. ps Application notes These test leads are designed for diagnostic testing of insulation and also for hand held testing of insulation Insulation ratings High voltage banana connector red black 5kV d c double insulation See Fig 5 High voltage tip red black 5kV d c double insulation Alligator red black 5kV d c double insulation See Fig 5 Fig 6 Guard banana connector green 600V CAT IV double insulation Cable yellow 12kV shielded See Fig 5 Fig 6 2 6 1 Guard test lead with alligator Insulation ratings Guard test lead with banana connectors green 600V CAT IV double insulation Alligator green 600V CAT IV double insulation MI 3202 GigaOhm 5 kV Warnings 3 Warnings In order to reach the highest level of operators safety while carrying out various measurements and tests using the GigaOhm 5kV Tester as well as to ensure that the test equipment remains undamaged it is necessary to consider the following warnings MEANING OF SYMBOLS Symbol on the instrument means Read the User Manual with special care may be present at the test terminals A Symbol on the instrument means Hazardous voltage higher than 70 V GENERAL PRECAUTIONS If the test equipment is used in a manner not specified in this Users Manual the protection provided by the equipment may be impaired Do not use the instrument and access
18. sing the charger will not work If you connect the instrument to the mains supply when instrument is turn ON the instrument will automatically switch from the battery supply to the main supply If the instrument is not in insulation measuring mode internal charger will begin to charge the batteries In upper left angle of LCD battery indicator will start to flash indicating that the batteries are charging Note It is not recommended to connect or disconnect the instrument to mains supply while the instrument is in measuring mode measuring mode When the instrument performing insulation measurements Backlight operation battery powered instrument After turning the instrument ON the LCD backlight is automatically turned ON It can be turned OFF and ON by simply clicking the LIGHT key Backlight operation mains powered instrument After turning the instrument ON the LCD backlight is automatically turned OFF It can be turned OFF and ON by simply clicking the LIGHT key Off function The instrument can be switched OFF only by pressing the ON OFF key The auto off function is not available to allow long term measurements MI 3202 GigaOhm 5 kV Measurements 5 Measurements 5 1 Generally about DC High voltage testing The purpose of insulation tests Insulating materials are important parts of almost every electrical product The material s properties depend not only on its compound characteristics but also on temperature pol
19. splayed on auxiliary display Dosis Analogue units Units for parameters displayed on analogue display F Pret Bar graph B en Warning icon Read the User Manual with special care UR Pass or Fail icon TU sss Main units p CT Main digital display de aane Test voltage Menu for selecting the test voltage MI 3202 GigaOhm 5 kV Instrument Description 2 3 Operator s Panel The operator s panel is shown in Fig 2 below LC display T 3 r o D Oo Fig 2 Front panel Legend je Q key to switch to Insulation measurement mode and to set limit value V AIT V key to switch to Voltage measurement mode nmn Light key to turn the display backlight ON or OFF Bons cursor key to decrease the test voltage parameter and to select limit value usto gt cursor key to increase the test voltage parameter and to select limit value Dicssndins START STOP key to start or stop insulation measurement y MES ON OFF key to switch the instrument ON or OFF MI 3202 GigaOhm 5 kV Instrument Description 2 4 Connectors The GigaOhm 5 kV Tester contains the following connections Connection of test leads to four banana safety sockets Fig 3 Mains supply cable connection to the mains socket Fig 4 Fig 3 Test leads connector Negative Insulation Resistance test terminal OUT rituel GUARD test terminals intended to lead away potential leakage current while measuring the Insulation Both gre
20. tact your distributor for further information 21 MI 3202 GigaOhm 5 kV Specifications 7 Specifications 7 1 Measurements Note All data regarding accuracy are given for nominal reference environment condition Insulation resistance Nominal test voltage 250 V 500 V 1 kV 2 5 kV 5 kV Current capability of test generator gt 1 mA Short circuit test current 5 mA Automatic discharge of tested object yes Measuring range Riso 0 12 MQ up to 999 GO Display range Riso Resolution Accuracy 5 999 kQ 1kQ 1 00 9 99 MQ 10 kQ ve m Doe 5 96 of reading 3 digits 1 00 9 99 GO 10 MQ 10 0 99 9 GO 100 MO 100 999 GO 1GO0 10 96 of reading 3 digits Full scale value of insulation resistance is defined according the following equation Hrs 1GQ Utesi V if Utest gt 1kV then Res 1TQ f For insulation resistance value under 5 kQ the instrument displays value 0 Q DC test voltage Voltage value 250V 500V 1kV 2 5kV 5kV Accuracy 0 10 96 20 V Output power 5 W max Display range test voltage V Resolution Accuracy 0 1999V 1V 2 00k 5 50k 10 V 3 96 of reading 3 V 22 MI 3202 GigaOhm 5 kV Specifications Generator Capability vs Resistance MQ Utest 5kV Voltage Voltage AC or DC Display range External Voltage V Resolution Accuracy 0 600
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