GigaOhm 1kV
Contents
1. eee e nee nn nee 11 AS WACOM ES Sep ee eee eee eeoeeege 13 4 4 Compensation of test leads resistance 14 4 4 Voltage measurement 14 5 Maintenance mmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnmnnnnnnnmnnns 15 5 1 INSPECCION E 15 5 2 Battery replacement 15 9 9 FUSE TODIACE MENT sn ced nese anda re e 16 5 4 Cleaning nnn nnn gt 16 DD DIC VIC Gates aaa cee See See Sas tet eee ea eS Sa Se deena eee Sea eaeeee cate 16 6 Specifications 7 1 17 6 1 Measurements see 17 6 2 General specifications 19 MI 3103 GigaOhm General introduction 1 General introduction 1 1 Features The GigaOhm 1KV is a portable hand held battery powered test instrument intended for testing of safety measures on mains installations The equipment is designed and produced with the extensive knowledge and experience acquired through many years of dealing with electrical installation test equipment General functions of the GigaOhm 1kV Insulation resistance measurement Continuity measurement using test current of 200 mA in accordance with EN 61557 4 standard Continuity measurement continuous measurement using test current of up2. GigaOhm 1kV MI 3103 User Manual Version 1 3 Code No 20 750 842 LP SY METREL Distributor Manufacturer METREL d d Ljubljanska cesta 77 1354 Horjul Slovenia web site http www metrel si e mail metrel metrel si 2005 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 3103 GigaOhm Table of contents 1 General introduction mmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne 4 1 FOURS aran 4 1 2 Applied Standards 22m 22 nn nnn nnn nn nnn nnn nn nnn nnn ne neces ccna 4 2 Instrument description 2 22222222 ene n nnn ee nn eeen ne eeeeneene m 5 2 1 Instrument casing 5 2 2 Operator s panel ssesesessessssese 5 2 3 CONNE CIO Sarees ssase tee Re PEER SERRE sce See e ne ner 6 24 BOROM SECUN aaa aa a nee 7 20 NCCC SSO NGS EEE e ea 7 3 Warnings and instrument messages 8 3 1 WarninQS 2 02 n nnn anne nnn nnn nnn nnn nnn nnn nnn nnn nnn anna nena anna nnn 8 3 2 Instrument messages se 9 4 Measurements mmmmmnnmnnnnnnnnnnennnnnnnnnnannnnnnnnnnnnnnnnnnnnnnnnnnmnnnmnnnnnne 10 4 1 Insulation resistance 10 4 2 R 200mMA
3. D Battery holder 6 Fuse 2 5 Accessories The instrument set consists 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 htip www metrel si MI 3103 GigaOhm Warnings and Instrument messages 3 Warnings and Instrument messages 3 1 Warnings In order to reach the highest level of operator s safety while carrying out various measurements and tests using the GigaOhm 1kV as well as to ensure the test equipment remains undamaged it is necessary to consider the following general warnings e If the test equipment is used in a manner not specified in this User Manual the protection provided by the equipment may be impaired e Do not use the instrument and accessories if any damage is noticed In case of blown fuse follow the instructions in this Instruction Manual to replace it o Service intervention or adjustment procedure is allowed to be carried out only by a competent authorised person Consider all generally known precautions in order to avoid risk of electric shock while dealing with electrical installations Use only standard or optional test accessories supplied by your distributor Do not connect test terminals to an external voltage higher than 600 V AC or DC in order not to damage the test instrument A symbol at the instrument means Read the
4. Measuring range Insulation Resolution Accuracy MO MO Un 250V 5 of reading 5 digits 25 of reading Nominal output voltages 250 V 500 V 1000 V Output voltage tolerance 0 20 Measuring current min 1 mA at 250 KQ 250 V 500 kQ 500 V 1 MQ 1000V Short circuit current lt 2 mA Auto discharge after test yes Measurement mode single continuous measurement One set of alkaline cells can supply the instrument for more than 70 hours R 200mA Measuring range according to EN 61557 4 is 0 16 Q 1999 Q Measuring range R 200ma Accuracy Q Q SSIES 3 of reading 3 digits 20 0 199 9 200 1999 5 of reading Open terminal test voltage 4V 7VDC Test current for R lt 2 Q gt 200 mA Compensation of test leads up to 5 Q yes Automatic polarity exchange yes Measurement mode single measurement continuous measurement 17 MI 3103 GigaOhm Specifications Rcon 0 T i 9 5 of reading 3 digits 200 999 RS ES 10 of reading 1000 1999 RE Open terminal test voltage 4 V 7 V DC Compensation of test leads up to 5 Q yes Short circuit test current upto 7 mA Measurement mode continuous measurement One set of alkaline cells can supply the instrument for more than 90 hours Voltage U M M 0 600 3 of reading 3 digits Nominal frequency range DC 16 Hz 450 Hz Measurement mode continuous measurement TRMS Measuring ra
5. User Manual with special care The symbol requires an action A symbol on LCD indicates an irregular condition of the tested item which may present a hazardous live voltage e Disconnect all test leads and switch power off before opening battery cover A symbol means that the instrument output can be higher than 1000V during insulation test Especially take care when measuring capacitive loads MI 3103 GigaOhm Warnings and Instrument messages 3 2 Instrument messages Messages are generated on the LCD using special symbols and numeric segment combinations The next figure shows all possible display segments and the table under the figure describes the messages Result AC voltage at test terminals s l H H H DC voltage lt I s Le VMQ A BAT Unit at test terminals gt Empty battery symbol A ming Fig 4 Display segments Description of possible display messages Result is out of range Test leads are compensated FUS Blown fuse in R 200m4 and Rcon functions only BAT Message before the instrument is switched off because of empty batteries Table 1 Display messages MI 3103 GigaOhm Measurements 4 Measurements 4 1 Insulation resistance Warnings e Make sure that the item to be tested is disconnected mains voltage disconnected before starting the insulation resistance measurement e When measuring insulation resistance between c
6. account handling maintenance and recycling requirements as defined by related standards national regulations and manufacturer of alkaline batteries 5 3 Fuse replacement The instrument contains a fuse to protect R 200mA and Rcon functions The fuse can blow if an external voltage is connected to the test terminals during the measurement See the fig 16 for fuse location Warning e Replace blown fuse with prescribed one only M0 315A otherwise the instrument may be damaged e Turn power off and disconnect any measurement accessory connected to the instrument before opening battery cover 5 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 5 5 Service Repairs under or out of warranty time please contact your distributor for further information Note e Unauthorised person is not allowed to open the instrument 16 MI 3103 GigaOhm Specifications 6 Specifications 6 1 Measurements Insulation resistance Measuring range according to EN 61557 2 is 0 16 MQ 1999 MQ Measuring range Insulation Resolution Accuracy MO MO Un 500V 1000V 0 00 1 999 0 001 5 of reading 5 digits 20 of reading Measuring range according to EN 61557 2 is 0 17 MQ 1999 MQ
7. for both R 200ma and Reon functions How to compensate test leads Select R 200mA or Reon function with the rotary switch Short the test leads Press the CAL key the message CAL is displayed for a while then 0 00 Q is displayed Resistance of test leads is now compensated and the instrument is ready for measurements A confirmation sound indicates that the new calibration values were accepted successfuly Note e Max resistance that can be compensated is 5 Q If total measured resistance is higher than 5 Q e g open test leads then any compensation previously stored is cancelled e Compensation remains valid until next compensation or until compensation is cancelled e g by performing the compensation with open test leads Indications that the test leads are compensated The message CAL for compensated test leads is displayed for a while when setting R 200mA or Reon with rotary switch 4 4 Voltage measurement How to carry out the measurement Select U function with the rotary switch knob Connect test leads to the equipment under test Read displayed result Voltage see the figure below EIH Fig 10 Example of voltage measurement result Note e Do not connect test leads to a voltage higher than 600 V AC to avoid possible damage of the instrument 14 MI 3103 GigaOhm Maintenance 5 Maintenance 5 1 Inspection To maintain operator s safety and ensure reliability o
8. f the instrument it is good practice to inspect the instrument on a regular basis Check that the instrument and accessories are not damaged If any defect is found please consult service centre distributor or manufacturer 5 2 Battery replacement The symbol BAT on the lower right corner of the LCD indicates the battery state Ubat lt 4 5 V lf a low battery state is indicated the batteries have to be replaced to ensure accurate measurements The instrument is switched off automatically when battery voltage drops down to 4 2 V bat indication is displayed before switching off Notes e All four cells shall be replaced each time e Turn power off and disconnect any measurement accessory connected to the instrument before opening battery cover Nominal power supply voltage is 6 V DC Use four 1 5 V alkaline cells type IEC LR14 dimensions diameter 26 mm height 50 mm 1 5V LR 14 I 1 5V LR 14 a gt SP T 1 5VLR14 Fig 16 Correct polarity of inserted batteries and fuse position 15 MI 3103 GigaOhm Maintenance Legend less Battery cover AR Serial number dits Fuse 2 ee Battery Notes e Insert cells correctly otherwise test instrument will not operate and cells could be discharged see the figure above for correct battery polarity e lf the instrument is not used for a long period of time remove all batteries from the battery compartment Warnings Take into
9. ing e Make sure the tested item is de energised mains voltage disconnected before starting the measurement Fuse will blow if the test probes are connected to mains voltage during the test How to carry out the measurement Select Rcon function with the rotary switch knob Make sure the test leads are compensated see the instructions in the chapter 4 4 Connect test leads to the tested item in accordance with figure 7 Press the TEST key and read the Rcon resistance result A double press of TEST key starts the continuous measurement The measurement is concluded after pressing the TEST key again The latest result will stay on the UT a Fig 9 Example of Rcon test result Notes e f an external voltage higher than 10 V AC DC is present at the test terminals the Rcon measurement will not be carried out after pressing the START key Symbol will be displayed e f indication FUS appears replace blown fuse See paragraph 5 3 Fuse replacement e Positive pole of test voltage is attached to the red test terminal 13 MI 3103 GigaOhm Measurements 4 4 Compensation of test leads resistance In order to achieve high accuracy of test results it is advised to compensate resistance of the test leads before carrying out R 200mA and Rcon measurements Especially it is advised to compensate test leads whenever the leads are changed for different ones Compensation of test leads resistance is stored and is used
10. ment is concluded after pressing TEST key again The latest result will stay on the display LIC J ma Fig 6 Example of displayed insulation resistance result Notes lf an external voltage higher than 20 V AC DC is present at the test terminals the insulation resistance measurement will not be carried out after pressing START key Symbol will be displayed Tested item is discharged automatically after finishing the measurement and the actual voltage is displayed during discharge operation only if high capacity is present on the test leads e Positive pole of test voltage is attached to the red test terminal 4 2 R 200mA Continuity of protection conductors is measured before mains voltage is connected to the tested installation new or adapted installation Max allowed resistance value depends on power of connected loads used installation system TN TT etc Test current of at least 200 mA is required by the EN 61557 4 regulation which is why this function has to be used whenever tests are done in accordance with this standard For additional general information concerning this measurement refer to the handbook Measurements on electric installations in theory and practice Warning e Make sure that the tested item is de energised mains voltage disconnected before starting the measurement Fuse will blow if the test probes are connected to the mains voltage during the test 11 MI 3103 GigaOhm Mea
11. nd ee Display Canoes TEST key to start any measurement 3 ON OFF key The instrument is automatically switched off if no action changing rotary switch position or pressing any key is taken for more than 10 minutes r ee Front label dd Rotary switch to select measurement function CPR CAL key to compensate resistance of the test leads 2 3 Connectors e Use original test accessories only e Max allowed voltage between mains test terminals and ground is 300 V e Max allowed voltage between mains test terminals is 600 V e Max output voltage between test terminals is 1200 V Fig 2 Connectors MI 3103 GigaOhm Instrument description 2 4 Bottom section R 200mA RCON 0 Q 2 kQ 002 2 kQ Uo c 4 V 7 V Uo c 4 V 7 V 1 2 2 gt 200 mA Is c lt 7 MA VOLTAGE U 0 V 600 V TRMS f 16 Hz 450 Hz or A X 2 INSULATION 0 MQ 200 MQ 250 V 0 MQ 2 GQ 500 V 1000 V Un 250 V 500 V 1000 V IN gt 1 mA at 250 kQ 250 V 500 KQ 500 V 1MQ 1000 V Isc lt 2 mA Oo LAA E CAT Illl 300 V P40 DISCONNECT ALL TEST LEADS AND SWITCH OFF THE INSTRUMENT BEFORE REMOVING THE BATERRY COVER HAZARDOUS VOLTAGE 4 POWER SUPPLY 6 V 4x1 5 V ALKALINE BATTERIES IEC LR 14 DISPLAY MEASSAGES FOS BROKEN FUSE rH LAL TEST LEADS COMPENSATED i Fig 3 Bottom section Legend LE Serial number O e Information label S N Battery cover 2 PART screw to fix battery cover
12. nge in operating conditions 18 MI 3103 GigaOhm Specifications 6 2 General specifications Power supply Typical operating time Auto power off Dimensions w x h x d Weight without accessories Display Protection classification Over voltage category Pollution degree Protection degree Reference conditions Reference temperature range Reference humidity range Operating conditions Working temperature range Maximum relative humidity Storage conditions Temperature range Maximum relative humidity 6 V DC 4 x 1 5 V alkaline battery IEC LR14 gt 0 h yes approximately 10 min of no activity 280 x 70 x 80 mm 490 g custom LCD Class Il double insulation CATIII 300 V 2 IP 40 10 C 30 C 40 RH 70 RH 0 C 40 C 95 RH 0 C 40 C non condensing 10 C 70 C 90 RH 10 C 40 C 80 RH 40 C 60 C Accuracies apply for 1 year in reference conditions Additional error in operating conditions is 1 of measured value and 1 digit Fuses Instrument protection M 0 315 A 250 V 5 x 22 mm 19
13. onductors all loads must be disconnected and all switches closed o Do not touch tested item while the test is in operation risk of electric shock J In case of capacitive test item capacitive compensation of reactive power long tested cable etc automatic discharge of the item may not be done immediately after finishing the measurement Falling voltage will be displayed in that case do not disconnect test leads until the voltage drops below 30 V Measurement is finished when voltage drops below 8V The following figure shows connection of the instrument to the tested item for testing insulation resistance on one and three phase electrical installations The measurement should be carried out between all conductors disconnected switches Fig 5 Example of instrument connection for measuring insulation resistance between L and N terminal There may be also other items to test such as motor windings ground cables antistatic floor coatings walls etc see the booklet Measurements on electric installations in theory and practice 10 MI 3103 GigaOhm Measurements How to carry out the measurement Select Insulation resistance function with appropriate test voltage using the rotary switch knob Connect test leads to the item to be tested in accordance with figure 5 Press the TEST key and read the displayed insulation resistance result double press of TEST key starts the continuous measurement The measure
14. surements How to carry out the measurement Select R 200mA function with the rotary switch knob Make sure test leads are compensated see the instructions in the chapter 4 4 Connect test leads to the tested item in accordance with figure 7 Press the TEST key and read the continuity resistance result double press of TEST key starts the continuous measurement The measurement is concluded after pressing the TEST key again The latest result will stay on the display disconnected Fig 7 Example of instrument connection for measuring continuity between potential equalizers UF Fig 8 Example of R 200mA test result Notes lf an external voltage higher than 10 V AC DC is present at the test terminals the R 200mA measurement will not be carried out after pressing the START key Symbol will be displayed o If indication FUS appears replace blown fuse with a new one See the paragraph 6 3 Fuse replacement 12 MI 3103 GigaOhm Measurements 4 3 Rcon Rcon function is used when there are inductive loads to be tested for example motor windings transformers etc or if there is no need to follow prescribed standards It can also be used as an ordinary multi meter resistance range Test current of only up to 7 mA is used For additional general information concerning continuity measurement refer to the handbook Measurements on electric installations in theory and practice Warn
15. to 7 mA AC DC voltage measurement Features Insulation resistance test voltages 250 V DC 500 V DC 1000 V DC Automatic discharge of tested item after measurement completion Automatic test voltage polarity exchange in Continuity 200 mA function Recon 7 mA function for inductive test items A custom designed LCD offers easy to read results Operation is simple and clear the operator does not need any special training except reading and understanding this User Manual to operate the instrument In order for the operator to be familiar with measurements in general it is advisable to read the handbook Measurements on electric installations in theory and practice 1 2 Applied Standards Instrument operation IEC EN 61557 1 IEC EN 61557 2 IEC EN 61557 4 IEC EN 61557 10 BS 7671 16 edition Electromagnetic compatibility EMC IEC 61326 Class B Safety EN IEC 61010 1 instrument EN IEC 61010 2 31 accessories MI 3103 GigaOhm Instrument description 2 Instrument description 2 1 Instrument casing The instrument is housed in a plastic casing which maintains the protection class defined in general specifications 2 2 Operator s panel The operator s panel consists of a custom LCD a rotary switch and a keyboard see the figure below em a A aoo PO DTO OO oo Mmaa 3 ET Insulation W METRE e E OM tO ON Fig 1 Front panel MI 3103 GigaOhm Instrument description Lege
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