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EurotestCOMBO - Alert Electrical

1. ee E switched off mains voltage CN iH Figure 5 8 Connections for insulation measurement Insulation resistance measuring procedure Select the NS function using the function selector switch Select the insulation subfunction with v keys Set the required test voltage Enable and set limit value optional Disconnect tested installation from mains supply and discharge insulation as required Connect test cable to the instrument and to the item to be tested see 5 8 Press the TEST key to perform the measurement double click for continuous measurement and later press to stop the measurement After the measurement is finished wait until tested item is fully discharged Store the result by pressing the MEM key optional EE os PY 2999s Um 5254 u Figure 5 9 Example of insulation resistance measurement result Displayed results BRONCE Insulation resistance e Test voltage actual value 28 MI 3125B EurotestCOMBO Measurements 5 4 Continuity The Continuity measurement is performed in order to ensure that the protective measures against electric shock through earthing connections and bondings are effective Six continuity sub functions are available Pa I N Pa R4 R R2 R4 Rw DOOdOUD DL It is important to select the appropriate sub function in order to classify the measurement to be correctly considered in verification documents Electrical Installation Cer
2. 1 V lt 50 O worst case Automatic measurement of auxiliary electrode resistance and probe resistance Automatic measurement of voltage noise 63 MI 3125B EurotestCOMBO Technical specification 8 7 Voltage freguency and phase rotation 8 7 1 Phase rotation Nominal system voltage range 100 Vac 550 Vac Nominal frequency range 14 Hz 500 Hz Result displayed 1 2 3 or 3 2 1 8 7 2 Voltage Measuring range V Resolution V 0 550 2 of reading 2 digits Iesu LY DC oad fu a eda True r m s trms Nominal frequency range 0 Hz 14 Hz 500 Hz 8 7 3 Frequency Measuring range Hz Resolution Hz 0 00 9 99 o 10 0 499 9 0 2 7o of reading 1 digit Nominal voltage range 10 V 550 V 8 7 4 Online terminal voltage monitor Measuring range V Resolution V 10 550 1 s of reading 2 digits 8 8 General data Power supply voltage 9 Vpc 6x1 5 V battery or accu size AA ODBI aUor i T typical 20 h Charger socket input voltage 12 V 10 96 Charger socket input current 400 mA max Battery charging current 250 mA internally regulated Overvoltage category 600 V CAT III 300 V CAT IV Plug test cable overvoltage category 300 V CAT lll Protection classification
3. double insulation Pollution degree 2 Protection degree IP 40 DISDIAY sra 128x64 dots matrix display with backlight Dimensions w x h x q 14 cm x 8 cm x 23 cm WEINE ee ocio 1 0 kg without battery cells Reference conditions Reference temperature range 10 C 30 C Reference humidity range 40 RH 70 RH Operation conditions Working temperature range 0 C 40 C 64 MI 3125B EurotestCOMBO Technical specification Maximum relative humidity 95 RH 0 C 40 C non condensing Storage conditions Temperature range 10 C 70 C Maximum relative humidity 90 RH 10 C 40 C 80 RH 40 C 60 C Communication transfer speed RS 232 115200 baud USB 256000 baud Memory SIZC ee I ERU O eI eb 1700 results The error in operating conditions could be at most the error for reference conditions specified in the manual for each function 1 of measured value 1 digit unless otherwise specified in the manual for particular function 65 MI 3125B EurotestCOMBO Appendix A A Appendix A Fuse table A 1 Fuse table impedances UK Fuse type B Fuse type C Rated Rated current 04 5 f curet 04 5 A A 3 12264 12200 1 3 0 3064 3064 Rated Rated current Lua
4. e YHA AA AA AL AL ALLE LLGC LL LL LL LL LL LL GALLN YN FN sae aenean 46 JO PELESENAN a a a 48 MI 3125B EurotestCOMBO Table of contents 6 Data handlind iu a GW RR Y UN NR AU 50 6 1 Memory organtzalloli ue sd 90 0 2 Dala STUC Sisa aaa 50 0 39 STONING test y 12 8 CER NR FN HYN PE NN Y HN NHY R FFA 52 0 Recalling Test FE SUNS ecciesie netu a aad 53 6 5 Clearing stored data cooccconiconoccncocnconnconicononononnnonnnnnnonanonanonanonnnoncnnanonanenono 54 6 5 1 Clearing complete memory content isses sessanta nns 54 6 5 2 Clearing measurement s in selected location and its sub locations 54 6 5 3 Clearing individual measurements lees sessanta nnns nans 55 6 5 4 Renaming installation structure elements esses 56 0 0 OAM Cato E _yx Y A CH A IH CR HR 57 E Maltenanco css 58 7 1 FUSeTeplaco Meda iii li 58 Y COMO e WN o es e O 58 Lo Penodi callbratlOn se ui Aia 58 54 Upgrading the nstTunmneni ee GL nL e E 58 O SENICE oaa E 58 8 Technical specifications oocconcoccccnnoncccnconcoancnnnonccancnnrnnccnnnnnrnancnnrnanennrnnrnanenannnrs 59 8 1 Insulation resistance ISO L N ISO L E ISO N E ISO L L o9 8 2 Continuity 4 Ring r4 r2 ru RitRe RitRn coccoccocccoccoccconcnccocncancncocancncnnnnnanonoos 59 O 9 SERGIO SUING itso E S 60 8 3 1 ELE E da AAA T T UU TTE 60 8 3 2 Conta
5. CW rotation sequence oA ee Invalid connection CCW rotation sequence recetas frequency 26 MI 3125B EurotestCOMBO Measurements 5 3 Insulation resistance The Insulation resistance measurement is performed in order to ensure safety against electric shock through insulation It is covered by the EN 61557 2 standard Typical applications are Insulation resistance between conductors of installation Insulation resistance of non conductive rooms walls and floors Insulation resistance of ground cables Resistance of semi conductive antistatic floors ODO O Four Insulation resistance sub functions are available ISO L E ISO L N ISO L L ISO N E OOO UU The insulation resistance tests are carried out in the same way regardless which sub function is selected However it is important to select the appropriate sub function in order to classify the measurement to be correctly considered in verification documents Electrical Installation Certificate Periodic Inspection Report etc EE oun PY See chapter 4 7 Function selection for instructions on key functionality Figure 5 7 Insulation resistance Test parameters for insulation resistance measurement Subfunction ISO L E ISO L N ISO N E ISO L L Test voltage 50 V 100 V 250 V 500 V 1000 V Minimum insulation resistance OFF 0 01 MQ 200 MO 2 MI 3125B EurotestCOMBO Measurements Test circuits for insulation resistance r ho
6. 230 Step 5 Step 6 SBmH G SBmH G lide Ame 35 ome lide Ame 35 ome woe farma ll lmsz woe farms 11 1m pre rohama 3 Shame pre Shes 3B5mz I 4 TY ANA nA ENDE anA G lt 1 146 4Bm 35 fma xo farma 11 1ms 1 x 25BBms 67 SUMS Ah 230 Bottom Figure 5 26 Two parts of result field in RCD autotest Displayed results gt Y Step 1 trip out time 5 s IAN 09 gt i M Step 2 trip out time ti IAN 1809 A Step 3 trip out time t 3 2 5xlAN 09 ana Step 4 trip out time B s OxIAN 180 K pe Step 5 trip out time t PA V2x AN 09 NO usen Step 6 trip out time ts 2xIAN 1809 P Step 7 trip out current 0 Pr Step 8 trip out current 180 Mo Contact voltage for rated IAN u The autotest sequence is immediately stopped if any incorrect condition is detected e g excessive Uc or trip out time out of bounds u Auto test is finished without x5 tests in case of testing the RCD type A with rated residual currents of lAn 300 mA 500 mA and 1000 mA In this case auto test result passes if all other results pass and indications for x5 are omitted u Tests for sensitivity l4 steps 7 and 8 are omitted for selective type RCD 40 MI 3125B EurotestCOMBO Measurements 5 7 Fault loop impedance and prospective fault current Fault loop is a loop comprised by mains source line wiring and PE return path to the mains source The instrument measures the impedance of the loop and calcul
7. 9 99k INN 61 MI 3125B EurotestCOMBO Technical specification Prospective fault current calculated value Measuring range A Resolution A 0 00 9 99 0 01 10 0 99 9 Consider accuracy of fault 100 99 1 leopresistance 1 00K 9 99k 10 measurement 10 0k 23 0k The accuracy is valid if mains voltage is stabile during the measurement Test current at 230 V 6 5 A 10 ms Nominal voltage range 93 V 266 V 45 Hz 65 Hz 8 4 2 RCD selected Fault loop impedance Measuring range according to EN6155 is 0 46 O 9 99 KQ Measuring range O Resolution O 0 00 9 99 m 100 999 or 6 ofreading 10 digits 100 99 Y Jw 1 00k 9 99k pili Acccuracy may be impaired in case of heavy noise on mains voltage Prospective fault current calculated value Measuring range A Resolution A 0 00 9 99 0 01 Consider accuracy of fault 10 99 1 loop resistance measurement Nominal voltage range 93 V 266 V 45 Hz 65 Hz No trip out of RCD R XL values are indicative 8 5 Line impedance and prospective short circuit current Voltage drop Line impedance Measuring range according to EN6155 is 0 25 O 9 99kQ Measuring range O Resolution O 0 00 9 99 0 01 5 9 100 999 nre 100 996 LOOK 9 99k REIS 62 MI 3125B EurotestCOMBO Technical specification Prospective short circuit
8. Fault loop impedance u Universal test cable u Mains measuring cable a Three phase adapter A 1111 RCD testing u Universal test cable u Mains measuring cable a Three phase adapter A 1111 Earth resistance RE u Earth set 20 m 4 wire u Earth set 50 m 4 wire S 2041 Phase seguence u Universal test cable a Three phase cable A 1110 u Three phase adapter A 1111 Voltage freguency u Universal test cable u Mains measuring cable 67 MI 3125B EurotestCOMBO Appendix B 68
9. SMARI EC EurotestCOMBO MI 3125B Instruction manual Version 1 3 Code no 20 751 577 S METREL Distributor Manufacturer METREL d d Ljubljanska cesta 77 1354 Horjul Slovenia web site http www metrel si e mail metrel metrel si O 2010 METREL The trade names Metrel Smartec Eurotest Autosequence are trademarks registered or pending in Europe and other countries No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL MI 3125B EurotestCOMBO Table of contents Table of contents 1 2 4 mild taa 5 Safety and operational considerations ecce eeee eere 6 2 1 Waihings aHnd NOS susi orit i rape ED poe oue ess 6 22 Balemn and Charo dentaria 9 2 2 1 New battery cells or cells unused for a longer period sssss 10 2 9 tabcdards a 6 8 9 rana 10 Instrument descriplION AAA AAA 12 3 1 A e e O OO DR GAR GU 12 32 COoOnnector Dane E T 13 Do IDACK ec T UU IET TL 14 Sc Display organiza OESTE 15 3 4 1 Terminal VONAGE MONTO saint YRR aee diva CGA AO RAA has 15 3 4 2 iz zig JNGICQUON TET EP 15 3 4 3 Message Tel morsi a PTT 15 3 4 4 FIO SU I o etc O iN T EP ES 16 3 4 5 SOU WANNA 1 SEF ee E 16 3 4 6 FACTO SCLC 2101 ME EEF NN AN YN q it O NET YF DDYN FFR UR FFF TYF FAR 16 3 4 7 Backlight and contrast adjust
10. A X 22x05xkw B G Jc Jo2xt05AN any B Table 5 1 Relationship between Uc and lan 36 MI 3125B EurotestCOMBO Measurements Loop resistance is indicative and calculated from Uc result without additional proportional factors according to R re AN S9mB LG Sau uc D Sv Rls 24 Fmax 16675 L PE NM g ecuen on M 229 Figure 5 22 Example of contact voltage measurement results Displayed results S c NE Contact voltage hM Fault loop resistance Rmax Maximum earth fault loop resistance value according to BS 7671 5 6 2 Trip out time RCDt Trip out time measurement verifies the sensitivity of the RCD at different residual currents Trip out time measurement procedure Select the Xela function using the function selector switch Set sub function RCDt Set test parameters if necessary Connect test cable to the instrument Connect test leads to the item to be tested see figure 5 21 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional Figure 5 23 Example of trip out time measurement results Displayed results Doors Trip out time UU into Contact voltage for rated lan 37 MI 3125B EurotestCOMBO Measurements 5 6 3 Trip out current RCD I A continuously rising residual current is intended for testing the threshold sensitivity for RCD trip out The instrument increases the test current in small
11. ANO N AK A A iJ PE MX ue rT Hm y Y T Qe l E SS result 1 2 3 result 2 1 3 Figure 5 5 Connection of universal test cable and optional adapter in three phase system 25 MI 3125B EurotestCOMBO Measurements 29599999999 JR L JJ o I i Figure 5 6 Connection of plug cable and universal test cable in single phase system Voltage measurement procedure Select the Ue my cu function using the function selector switch Connect test cable to the instrument Connect test leads to the item to be tested see figures 5 5 and 5 6 Store voltage measurement result by pressing the MEM key optional Measurement runs immediately after selection of Ue my cg function VOLTAGE TERMS VOLTAGE TRS ng Seay di YH ug EW sme 11 3 x us lazaa 137 rll le Sada U23 3760 uzc Sra Figure 5 7 Examples of voltage measurement in three phase system Displayed results for single phase system 8 9 Voltage between phase and neutral conductors Ulpe Voltage between phase and protective conductors Unpe Voltage between neutral and protective conductors sois frequency Displayed results for three phase system LE A Voltage between phases L1 and L2 Po Voltage between phases L1 and L3 UZ A Voltage between phases L2 and L3 AA Correct connection
12. Input voltage L PE Notes a High fluctuations of mains voltage can influence the measurement results the noise sign HiH is displayed in the message field In this case it is recommended to repeat few measurements to check if the readings are stable a The Zloop test will trip out the RCD in RCD protected electrical installation u Select Zs rcd to prevent trip out of RCD in RCD protected installation 42 MI 3125B EurotestCOMBO Measurements 5 8 Line impedance and prospective short circuit current Voltage drop Line impedance is measured in loop comprising of mains voltage source and line wiring Line impedance is covered by the reguirements of the EN 61557 3 standard The Voltage drop sub function is intended to check that a voltage in the installation stays above acceptable levels if the highest current is flowing in the circuit The highest current is defined as the nominal current of the circuit s fuse The limit values are described in the standard EN 60364 5 52 Sub functions u Z LINE Line impedance measurement according to EN 61557 3 u AU Voltage drop measurement See chapter 4 7 Function selection for instructions on key functionality L PE N ao Figure 5 30 Line impedance Test parameters for line impedance measurement Selection of line impedance Zline or voltage drop AU sub function FUSE type Selection of fuse type BS88 BS3036 BS1361 BS1362 B C D FUSE Rated current of sele
13. 31 9 MEM SAVE Figure 6 3 Save test menu a Memory space available for storing results Keys in save test menu installation structure field Selects the location element Object D Board Circuit or TAB Bonding or Electrode UP DOWN Selects the location element in selected level Saves test results to the selected location and returns to the MEM measuring menu Function selectors Exits back to main function menu TEST Notes u The instrument offers to store the result to the last selected location by default a If the measurement is to be stored to the same location as the previous one just press the MEM key twice 52 MI 3125B EurotestGOMBO Data handling 6 4 Recalling test results Press the MEM key in a main function menu when there is no result available for storing or select MEMORY in the SETTINGS menu RELHLL FEST CEMOBJECT 442 D E I EOARD bay FECALL FESULT CIRFJEIRCUIT mw Ho 6 6 ISO LE Figure 6 4 Recall menu installation Figure 6 5 Recall menu measurements Structure field selected field selected Keys in recall memory menu installation structure field Selects the location element Object D Board Circuit or RAD Bonding or Electrode UP DOWN Selects the location element in selected level Function selector TEST Exits back to main function menu MEM Enters measurements field Keys in recall memory menu measurements field U
14. RE gt Resistance to earth u lt SETTINGS gt General instrument settings UP DOWN Selects sub function in selected measurement function UD DU ODODO TAB Selects the test parameter to be set or modified TEST Runs selected test measurement function MEM Stores measured results recalls stored results Keys in test parameter field UP DOWN Changes the selected parameter TAB Selects the next measuring parameter FUNCTION SELECTOR Toggles between the main functions MEM Stores measured results recalls stored results General rule regarding enabling parameters for evaluation of measurement test result OFF No limit values indication Parameter Value s results will be marked as PASS or FAIL in ON e accordance with selected limit see chapter 5 for more information about the operation of the instrument test functions 18 MI 3125B EurotestCOMBO Instrument operation 4 2 Settings Different instrument options can be set in the SETTINGS menu Options are u Selection of language u Setting the instrument to initial values EMORY u Recalling and clearing stored results SET DATE T1ME a Setting the date and time WROD testing u Selection of reference standard for RCD test u Entering Z factor a Commander support Figure 4 1 Options in Settings menu Keys UP DOWN Selects appropriate option TEST Enters selected option Function selectors Exits back to main function menu 4 2 1 Languag
15. Trip out time Trip out current RCD autotest UDDODDU See chapter 4 1 Function selection for instructions on key functionality jj I S Uc u L PE M Boi n o aja Figure 5 20 RCD test Test parameters for RCD test and measurement TEST RCD sub function test RCDt RCD I AUTO Uc LAN Rated RCD residual current sensitivity lan 10 mA 30 mA 100 mA 300 mA 500 mA 1000 mA type RCD type 8 5 test current waveform plus starting polarity v w Zo Multiplication factor for test current 1 2 5 Ilan Conventional touch voltage limit 25 V 50 V Notes a Ulim can be selected in the Uc sub function only The instrument is intended for testing of General non delayed and S elective time delayed RCDs which are suited for Alternating residual current AC type marked with lt symbol Pulsating residual current A type marked with symbol Pulsating residual current A type marked with symbol DC residual current B type marked with symbol DoOodtL Time delayed RCDs have delayed response characteristics As the contact voltage pre test or other RCD tests influence the time delayed RCD it takes a certain period to recover into normal state Therefore a time delay of 30 s is inserted before performing trip out test by default 35 MI 3125B EurotestCOMBO Measurements Connections for testing RCD Ro A
16. m IF Figure 5 21 Connecting the plug cable and the universal test cable 5 6 1 Contact voltage RCD Uc A current flowing into the PE terminal causes a voltage drop on earth resistance e voltage difference between PE equipotential bonding circuit and earth This voltage difference is called contact voltage and is present on all accessible conductive parts connected to the PE It shall always be lower than the conventional safety limit voltage The contact voltage is measured with a test current lower than Y lan to avoid trip out of the RCD and then normalized to the rated Ian Contact voltage measurement procedure Select the Xela function using the function selector switch Set sub function Uc Set test parameters if necessary Connect test cable to the instrument Connect test leads to the item to be tested see figure 5 21 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional The contact voltage result relates to the rated nominal residual current of the RCD and is multiplied by an appropriate factor depending on RCD type and type of test current The 1 05 factor is applied to avoid negative tolerance of result See table 5 1 for detailed contact voltage calculation factors RCD type Contact voltage Uc proportional to Rated ln 1 AC G 405 _ J any AC S 2105x HUS wee M A S X AO H 4 dden om
17. s amm I TU A 153 156 5 836 13122 0 288 0288 60 0232 0232 80 0444 0144 HE 0112 0112 100 12205 0072 0072 j Fuse type BS 88 Fuse type BS 1362 Rated Rated emm Tra TS current 04 5 A A 1 68106 1708 3 1312 1856 408 59386 13 1936 3064 216 334 1416 2328 Fusetype BS 3036 3 1152 Rated Disconnection time s 0 832 1 472 current 04 5 SS 08 a 1 y 0833 5 d 76604 14106 1 066 1 204 428 80 J S 0456 20 J 14066 300 100 X 033 30 J 08722 212 poe All impedances are scaled with factor 0 8 66 MI 3125B EurotestCOMBO Appendix B B Appendix B Accessories for specific measurements The table below presents standard and optional accessories required for specific measurement The accessories marked as optional may also be standard ones in some sets Please see attached list of standard accessories for your set or contact your distributor for further information Function Suitable accessories Optional with ordering code A Insulation resistance u Universal test cable R LOWO resistance u Universal test cable u Probe test lead 4m A 1012 A Voltage frequency a Universal test cable Line impedance u Universal test cable u Mains measuring cable u Three phase adapter A 1111
18. steps through appropriate range as follows Sloperange Waveform RCD type Slope range Waveform Start value Endvalue A lan gt 30 mA 0 2xlaN 1 5xlan Pul A lay 10 mA _ B O2XAN 22xlAN Maximum test current is I trip out current or end value in case the RCD didn t trip out Trip out current measurement procedure Select the Xela function using the function selector switch Set sub function RCD I Set test parameters if necessary Connect test cable to the instrument Connect test leads to the item to be tested see figure 5 21 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional 27 Dna 2 7 054 Llc1 8 1U ti So SME L PE N DK Eso TELT ic j L 1 jJ Ucit a8 1U ti Sg SmS L PE N e Dn vg 218 Trip out After the RCD is turned on again Figure 5 24 Trip out current measurement result example Displayed results A Trip out current Uci Contact voltage at trip out current or end value in case the RCD didn t trip mr Trip out time 5 6 4 RCD Autotest RCD autotest function is intended to perform a complete RCD test trip out time at different residual currents trip out current and contact voltage in one set of automatic tests guided by the instrument Additional key HELP DISPLAY Toggles between top and bottom part of results field 38 MI 3125B EurotestCOMBO Measurements RCD aut
19. test leads resistance if necessary see chapter 5 1 Connect Easy Switch to the instrument see figure 5 16 Connect Easy switch to the final ring circuit The electrical installation must be de energized during the test see figure 5 16 Press the TEST key to perform the measurement Perform measurements of r1 rN and r2 Commit results TAB key to r1 rN and r2 The r1 rN r2 results can be cleared with the TAB key Store the results optional From r4 rn and r gt results reference values R4 Ru 4 Ri R2 4 are calculated The results are kept until they are changed or cleared Take care that measuring leads are compensated RING rl r2 rM RING rl ri PA FAA 4B T e LL 0 Figure 5 18 Examples of Ring Continuity test Step 1 Displayed results a Ring resistance of line conductors committed and measured qM Ring resistance of neutral conductors committed and measured alas Ring resistance of protective conductors committed and measured Step 2 R Rn Ri R2 resistance measuring procedure Easy switch must stay connected to the final ring circuit The electrical installation must be de energized during the test see figure 5 17 Select the NINO function Set sub function R1 RN R1 R2 Connect plug cable or test cable to the instrument Compensate test leads resistance if necessary see chapter 5 1 Connect plug cable or test cable to a socket in final ring circuit Press the TEST key for mea
20. test leads to the tested points see figure 5 34 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional 45 MI 3125B EurotestCOMBO Measurements Step 1 Zref Step 2 Voltage drop Figure 5 35 Examples of voltage drop measurement result Displayed results AU tata Voltage drop ras Prospective short circuit current Pas Line impedance at measured point A A Reference impedance Voltage drop is calculated as follows AU Zeer ty 100 N where AU cs calculated voltage drop Lira impedance at test point LZ REF Sai impedance at reference point WE rated current of selected fuse Usina nominal voltage see table below Input voltage range L N or L1 L2 400 V Note a Ifthe reference impedance is not set the value of Zrer is considered as 0 00 O a The Zrer is cleared set to 0 00 Q if pressing CAL key while instrument is not connected to a voltage source a Isc is calculated as described in chapter 5 8 1 Line impedance and prospective short circuit current a If the measured voltage is outside the ranges described in the table above the AU result will not be calculated u High fluctuations of mains voltage can influence the measurement results the noise sign HiH is displayed in the message field In this case it is recommended to repeat few measurements to check if the readings are stable 5 9 Earth resistance Earth resistance is one of the most important param
21. to phase voltage the warning message is displayed instrument buzzer is activated and further measurements are disabled in Z LOOP and RCD functions Warning a If dangerous voltage is detected on the tested PE terminal immediately stop all measurements find and remove the fault Notes a Inthe SETTINGS and VOLTAGE TRMS menus the PE terminal is not tested u PE test terminal does not operate in case the operator s body is completely insulated from floor or walls 49 MI 3125B EurotestCOMBO 6 Data handling 6 1 Memory organization Data handling Measurement results together with all relevant parameters can be stored in the instrument s memory After the measurement is completed results can be stored to the flash memory of the instrument together with the sub results and function parameters 6 2 Data structure The instrument s memory place is organized in a three level structure as follows a Object 1 structure level the highest level a Distribution Board 2 structure level a Circuit Earth Electrode Bonding conductors 3 structure level OBJECT 001 gt DISTRIBUTION BOARD 001 CIRCUIT 001 CIRCUIT 002 CIRCUIT 199 EARTH ELECTRODE gt BONDING Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor DISTRIBUTION BOARD 002 CIRCUIT 001 CIRCUIT 002 gt CIRCUIT 199 gt EARTH
22. toggles between top and bottom parts of results field Accesses help menus Calibrates test leads in Continuity functions Starts Zrer measurement in Voltage drop sub function Selects the parameters in selected function Green indicator indicates PASS FAIL of result Red indicator 12 MI 3125B EurotestCOMBO Instrument description 3 2 Connector panel Figure 3 2 Connector panel Legend 1 Testconnector Measuring inputs outputs 2 Protection cover 3 Charger socket 4 USBconnector Communication with PC USB 1 1 port o PS 2 connector Serial port for upgrading the instrument Warnings a Maximum allowed voltage between any test terminal and ground is 600 V a Maximum allowed voltage between test terminals is 600 V a Maximum short term voltage of external power supply adapter is 14 V 13 MI 3125B EurotestCOMBO Instrument description 3 3 Back side Figure 3 3 Back side Legend Side belt Battery compartment cover Fixing screw for battery compartment cover Back panel information label Holder for inclined position of the instrument Magnet for fixing instrument close to tested item optional Oo Oes O NM 1 WW32IS vva3zis 4 Figure 3 4 Battery compartment Legend 1 Battery cells oize AA alkaline or rechargeable NiMH NiCd 2 Serial number label 3 Fuse M 0 315 A 250 V 14 MI 3125B EurotestCOMBO Instrument description 3 4 Display organization Function name f
23. 2 Press the TEST key to perform the measurement After the measurement is finished store the result by pressing the MEM button optional UD UU 2 LD PP eoeobou 30 MI 3125B EurotestCOMBO Measurements Figure 5 13 Example of Continuity result Displayed result O Rd RE O Continuity result Ran Result at positive polarity ST Result at negative test polarity 9 5 Ring Continuity With Easy Switch A1214 the resistance measurements in final ring circuits can be simplified The Easy Switch cares for correct connectivity at the switchboard r4 rw r2 or R4 R R4 Ry measurements can be performed in one go RING r1 r2 gt rM See chapter 4 7 Function selection for instructions on key functionality Figure 5 15 Ring Continuity HH Ri Rn Test parameters for Ring Continuity measurement Subfunction r4 Po I N R4 R2 R1 Rn The Ring Continuity measurement is performed with automatic polarity reversal of the test voltage according to IEC EN 61557 4 31 MI 3125B EurotestCOMBO Measurements Test circuits for Ring Continuity measurement mains voltage switched off L a C p py mains voltage switched off qe PE C p c Figure 5 17 Step 2 measurement of resistances H4 Hb Hi Hw 32 MI 3125B EurotestCOMBO Measurements Ring Continuity measuring procedure Step 1 r4 rn r2 resistance measuring procedure Select the Niel function Set sub function r1 rN r2 Compensate
24. A JB AC A B AC A B_ AC A B 30 15 105 15 30 42 eo 60 es 120 150 212 300 v v v 1000 300 150 105 150 300 424 600 600 848 n a 1500 n a 500 J 250 175 250 500 707 1000 1000 1410 n a 2500 1000 500 350 500 1000 1410 n a 2000 n a na n a na na v v na jM not applicable ACID rd sine wave test current POLVO sore pulsed current B IVDO TH E smooth DC current 8 3 2 Contact voltage RCD Uc Measuring range according to EN61557 is 20 0 V 31 0V for limit contact voltage 25V Measuring range according to EN61557 is 20 0 V 62 0V for limit contact voltage 50V Measuring range V Resolution V 00 199 04 0 0 19 9 O 96 15 96 of reading 10 digits 20 0 99 9 um 0 96 15 96 of reading The accuracy is valid if mains voltage is stabile during the measurement and PE terminal is free of interfering voltages Test current seseesee max 0 5xlAw Limit contact voltage 25V 50V opecified accuracy is valid for complete operating range 8 3 3 Trip out time Complete measurement range corresponds to EN 61557 requirements Maximum measuring times set according to selected reference for RCD testing Measuring range ms Resolution ms 0 0 40 0 1 ms 60 MI 3125B EurotestCOMBO Technical specification For max time see normative references in 4 2 3 this specification applies to
25. ELECTRODE gt BONDING Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor DISTRIBUTION BOARD 199 OBJECT 002 OBJECT 199 CIRCUIT 001 CIRCUIT 002 gt CIRCUIT 199 gt EARTH ELECTRODE gt BONDING Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor Figure 6 1 Instrument memory organization 50 MI 3125B EurotestGOMBO Data handling The memory structure is organized in a way that is suited to BS 7671 and other verification documents Electrical Installation Certificate Periodic Inspection Report etc If the results are stored in appropriate memory locations an automatic creation of a certificate report is possible Display organization The installation structure field describes the location of the measurement which object bord circuit In the measurement field there is information about type and number of measurements that belong to the selected structure element object and block and fuse The main advantages of this system are u Test results can be organized and grouped in a structured manner that reflects the structure of the electrical installation u Customized names of data structure elements can be uploaded from EurolinkPRO PCSW u Simple browsing through the structure and results a Test ce
26. P DOWN Selects the stored measurement TAB Returns to installation structure field Function selector l TEST Exits back to main function menu MEM View selected measurement results s Figure 6 6 Example of recalled measurement result Keys in recall memory menu measurement results are displayed UP DOWN Displays measurement results stored in selected location MEM Returns to measurements field Function selector TEST Exits back to main function menu 53 MI 3125B EurotestGOMBO Data handling 6 5 Clearing stored data 6 5 1 Clearing complete memory content Select CLEAR ALL MEMORY in MEMORY menu A warning see fig 6 6 will be displayed All saved results Will be lost Figure 6 7 Clear all memory Keys in clear all memory menu TEST Confirms clearing of complete memory content Function Exits back to main function menu without changes selectors CLEARING MEMORY Figure 6 8 Clearing memory in progress 6 5 2 Clearing measurement s in selected location and its sub locations Select DELETE RESULTS in MEMORY menu DELETE FESULT a DpEJ B IECT Bae DELETE FEST eae ere EZ D E D HOARI 447 gt cIR LIELLIIT 643 Figure 6 9 Clear measurements menu data structure field selected Keys in delete results menu installation structure field selected Selects the location element Object D Board Circuit or La Bonding or Electrode UP DOWN Selects the location
27. aces available on the instrument USB or RS 232 The instrument automatically selects the communication mode according to detected interface USB interface has priority PS 2 RS 232 cable minimum connections 1 to 2 4 to 3 3 to 5 PS 2 for MI 3125 9 pin D female for PC Figure 6 14 Interface connection for data transfer over PC COM port How to transfer stored data RS 232 communication connect a PC COM port to the instrument PS 2 connector using the PS 2 RS232 serial communication cable USB communication selected connect a PC USB port to the instrument USB connector using the USB interface cable owitch on the PC and the instrument Run the EurolinkPRO program The PC and the instrument will automatically recognize each other The instrument is prepared to download data to the PC Read the file README EuroLink txt on CD for instructions about installing and running the program Note a USB drivers should be installed on PC before using the USB interface Refer to USB installation instructions available on installation CD 5 MI 3125B EurotestCOMBO Maintenance 7 Maintenance Unauthorized persons are not allowed to open the Eurotest Combo instrument There are no user replaceable components inside the instrument except the battery and fuse under rear cover 7 1 Fuse replacement There is a fuse under back cover of the Eurotest Combo instrument a F1 M 0 315 A 250 V 20x5 mm This fuse protects interna
28. arity gt 0 Limit contact voltage 50 V Current multiplier x1 Parameters limit value Note a Initial settings reset of the instrument can be recalled also if the TAB key is pressed while the instrument is switched on 20 MI 3125B EurotestCOMBO Instrument operation 4 2 3 Memory In this menu the stored data can be recalled CHLL RESM and deleted See chapter 6 Data handling for IELETE RESULTS more information CLEAR ALL MEMORY Figure 4 4 Memory options Keys UP DOWN Selects option TEST Enters selected option Function selectors Exits back to main function menu 4 2 4 Date and time In this menu date and time can be set zd sep Figure 4 5 Setting date and time Keys TAB Selects the field to be changed UP DOWN Modifies selected field TEST Confirms new setup and exits Function selectors Exits back to main function menu Warning If the batteries are removed for more than 1 minute the set time and date will be lost 4 2 5 RCD standard In this menu the used standard for RCD tests can be set AUS NZ Figure 4 6 Selection of RCD test standard Keys UP DOWN Selects standard TEST Confirms selected standard Function selectors Exits back to main function menu 21 MI 3125B EurotestCOMBO Instrument operation Maximum RCD disconnection times differ in various standards The trip out times defined in individual standards are li
29. ates the short circuit current The measurement is covered by reguirements of the EN 61557 3 standard See chapter 4 1 Function selection for instructions on key functionality Figure 5 27 Fault loop impedance Test parameters for fault loop impedance measurement Selection of fault loop impedance sub function Zloop Zs rcd See Appendix A for reference fuse data Circuits for measurement of fault loop impedance Figure 5 28 Connection of plug cable and universal test cable 41 MI 3125B EurotestCOMBO Measurements Fault loop impedance measurement procedure Select the 4fexeye or Mee subfunction using the function selector switch and Aly keys Select test parameters optional Connect test cable to the Eurotest Combo Connect test leads to the the item to be tested see figures 5 28 and 5 21 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional loot BS3b36 15H BS3836 12H 0 46 0 49 Izc 495H Lim 4 191 Isc i46rH Lim 4 19 Figure 5 29 Examples of loop impedance measurement result Displayed results Laa Fault loop impedance SO Prospective fault current LLW High limit fault loop impedance value Prospective fault current lprc is calculated from measured impedance as follows U y Pe Z pp Scaling _ factor where BI E Nominal U_ pe voltage see table below Scaling factor Impedance correction factor see chapter 4 2 6
30. changes Keys in dialog for confirmation to clear selected result s HELP Deletes selected measurement result MEM Exits back to measurements field without changes Function selector Exits back to main function menu without changes 55 MI 3125B EurotestGOMBO Data handling DELETE RESLIL T gt Se DELETE FESULTS ae DEJ OB JECT HWZ DEJ B JECT BAZ D E I EOARD Ba D E I EOARD Bay CIRJEIRCUIT EH CIRJEIRCUIT EH Ho bb Ho cn CLEAR RESULT ISO L E Figure 6 11 Dialog for confirmation Figure 6 12 Display after measurement was cleared 6 5 4 Renaming installation structure elements Default installation structure elements are Object D Board Circuit Electrode and Circuit In the PCSW package EurolinkPRO default names can be changed with customized names that corresponds the installation under test Refer to PCSW EurolinkPRO HELP menu for information how to upload customized installation names to the instrument FECALL FESULT DEJ APPARTMENT 1 D E MAIN BOARD CIR K ITCHEM gt Ho bb Is0 LE Figure 6 13 Example of menu with customized installation structure names 56 MI 3125B EurotestGOMBO Data handling 6 6 Communication Stored results can be transferred to a PC A special communication program on the PC automatically identifies the instrument and enables data transfer between the instrument and the PC There are two communication interf
31. ct any measuring accessory connected to the instrument and turn off the instrument a Ensure that the battery cells are inserted correctly otherwise the instrument will not operate and the batteries could be discharged a f the instrument is not to be used for a long period of time remove all batteries from the battery compartment a Alkaline or rechargeable Ni Cd or Ni MH batteries size AA can be used Metrel recommends only using rechargeable batteries with a capacity of 2100mAh or above a Do not recharge alkaline battery cells a Use only power supply adapter delivered from the manufacturer or distributor of the test equipment to avoid possible fire or electric shock 9 MI 3125B EurotestCOMBO Safety and operational considerations 2 2 1 New battery cells or cells unused for a longer period Unpredictable chemical processes can occur during the charging of new battery cells or cells that have been left unused for a longer period more than 3 months Ni MH and Ni Cd cells can be subjected to these chemical effects sometimes called the memory effect As a result the instrument operation time can be significantly reduced during the initial charging discharging cycles of the batteries In this situation Metrel recommend the following procedure to improve the battery lifetime Procedure Notes gt Completely charge the battery At least 14h with in built charger This can be performed by using the gt Completely discharge the ba
32. ct voltage RCD UC 2 3 o o HR Eie b tiis eli aac aia dL 60 8 3 3 A T e 60 8 3 4 FHD OUF CUT NE A aaa 61 8 4 Fault loop impedance and prospective fault current 61 8 4 1 No disconnecting device or FUSE Selected occocoonccccoccnocononcononononanononononoos 61 8 4 2 iS BET E 110 NA sash A NE 62 8 5 Line impedance and prospective short circuit current Voltage drop 62 0 0 RESISTANCE TO GAUT A E 63 8 7 Voltage frequency and phase rotatiON occooccoccconconnconconiocncononnncnnconononnnos 64 8 7 1 PDnaseTolaloll nau a Ma ae teed A AU en eh tata a 64 8 7 2 VOM Ez To FROWN YDD A ET NY FYND PHD FD NN 64 8 7 3 FT OQUCIICY C 64 8 7 4 Online terminal voltage monitor occcococccccccnncocononococnnononnnnonononenannnnnnanononanonenanos 64 9 0 X General dale dues we wes ye 64 A AppendixA F se table ninin 66 A 1 Fuse table impedances UK coocccoccconicccoccnoocncococonocononononononnnnononanonanenanenons 66 B Appendix B Accessories for specific measurements 67 MI 3125B EurotestCOMBO Preface 1 Preface Congratulations on your purchase of the Eurotest instrument and its accessories from METREL The instrument was designed on a basis of rich experience acquired through many years of dealing with electric installation test eguipment The Eurotest instrument is professional multifunctional ha
33. cted fuse Maximum breaking time of selected fuse Minimum short circuit current for selected fuse See Appendix A for reference fuse data Additional test parameters for voltage drop measurement Maximum voltage drop 3 0 9 0 94 43 MI 3125B EurotestCOMBO Measurements 5 8 1 Line impedance and prospective short circuit current Circuits for measurement of line impedance Ro Rel LUN AS Figure 5 32 Phase neutral or phase phase line impedance measurement connection of plug cable and 3 wire test lead Line impedance measurement procedure Select the 4M 3 sub function Select test parameters optional Connect test cable to the instrument Connect test leads to the item to be tested see figure 5 32 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional 7 0 8 Iscil 45EkHL1ms 32H MH 6120200 Lin I PS 3112 7 Isciss fH Limils fH _ L FE NM Line to neutral Line to line Figure 5 33 Examples of line impedance measurement result Displayed results ne Line impedance oT Prospective short circuit current Lim Low limit prospective short circuit current value or high limit line impedance value for the UK version Prospective short circuit current is calculated as follows I Un x Koc SC Z where 8 FEES Nominal L N or L1 L2 voltage see table below KSC Correction fact
34. current calculated value Measuring range A Resolution A 0 00 0 99 1 0 99 9 Consider accuracy of line 100 999 ARAS resistance measurement 1 00k 99 99k A 1 7 100k 199k 1000 Test current at 230 V 6 5 A 10 ms Nominal voltage range 30 V 500 V 45 Hz 65 Hz R XL values are indicative Voltage drop calculated value Measuring range m 0 0 99 9 Consider accuracy of line impedance measurement s Zrer measuring range 0 00 O 20 0 O See chapter 5 6 2 Voltage drop for more information about calculation of voltage drop result 8 6 Resistance to earth Measuring range according to EN61557 5 is 0 25 O 1999 O Measuring range O Resolution O 0 00 19 99 0 01 20 0 199 9 5 of reading 5 digits 200 9999 Max auxiliary earth electrode resistance Rc 100xRz or 50 KQ whichever is lower Max probe resistance Rp 100xRz or 50 kQ whichever is lower Additional probe resistance error at Remax or Remax 10 of reading 10 digits Additional error at 3 V voltage noise 50 HZ 5 9o of reading 10 digits Open circuit voltage sss 15 VAC Short circuit voltage 30 mA Test voltage frequency 125 Hz Noise voltage indication threshold
35. d and similar uses Residual current operated circuit breakers with integral overcurrent protection for household and similar uses Electrical installations of buildings Part 4 41 Protection for safety protection against electric shock Low voltage electrical installations Part 5 52 Selection and erection of electrical equipment Wiring systems IEE Wiring Regulations 17 edition In service safety inspection and testing of electrical equipment Note about EN and IEC standards u Text of this manual contains references to European and British standards All standards of EN 6XXXX e g EN 61010 series are equivalent to IEC standards with the same number e g IEC 61010 and differ only in amended parts required by European harmonization procedure 11 MI 3125B EurotestCOMBO Instrument description 3 Instrument description 3 1 Front panel Legend 1 LCD 2 TEST 3 UP 4 DOWN 5 MEM 6 Function selectors 7 Backlight Contrast 8 ON OFF 9 HELP CAL 10 TAB 11 PASS FAIL 12 Y o 6 Figure 3 1 Front panel 128 x 64 dots matrix display with backlight TEST Starts measurements Acts also as the PE touching electrode Modifies selected parameter Store recall clear tests in memory of instrument Selects test function Changes backlight level and contrast Switches the instrument power on or off The instrument automatically turns off 15 minutes after the last key was pressed In RCD Auto
36. e In this menu the language can be set Figure 4 2 Language selection Keys UP DOWN Selects language TEST Confirms selected language and exits to settings menu Function selectors Exits back to main function menu 4 2 2 Initial settings MINITIAL SETTINGS In this menu the instrument settings and ee ie EUm Gn measurement parameters and limits can be dens i esta set to initial factory values factor RCD standard Will be set to default Figure 4 3 Initial settings dialogue 19 MI 3125B EurotestCOMBO Instrument operation Keys TEST Restores default settings Function selectors Exits back to main function menu without changes Warning u Customized settings will be lost when this option is used a lf the batteries are removed for more than 1 minute the custom made settings will be lost The default setup is listed below Instrument setting Default value As defined and stored by adjustment procedure 08 7005 9955955555 Z factor RCD standards EN 61008 EN 61009 Engish Q 0 English Commander Enabled Function Sub function EARTH RE No limit R ISO No limit L N L E N E L L Utest 500 V CONTINUITY No limit r1 rN r2 R2 R1 R2 R1 RN Z LlNE Fuse type none selected VOLTAGE DROP AU 4 0 ZREF 0 00 O Z LOOP Fuse type none selected ZS rcd Fuse type none selected RCD t Nominal differential current lan 30 mA RCD type G Test current starting pol
37. ealer for more information 7 5 Service For repairs under warranty or at any other time please contact your distributor 58 MI 3125B EurotestCOMBO Technical specification 8 Technical specifications 8 1 Insulation resistance ISO L N ISO L E ISO N E ISO L L Insulation resistance nominal voltages 50 Vpc 100 Vpc and 250 Vpc Measuring range according to EN6 1557 is 0 25 MO 199 9 MQ Measuring range MO Resolution MO 0 00 19 99 5 of reading 3 digits 20 0 99 9 0 1 10 of reading 100 0 199 9 20 of reading Insulation resistance nominal voltages 500 Vpc and 1000 Vpc Measuring range according to EN6155 is 0 15 MO 1 GQ 200M 999M 10 of reading Voltage Measuring range V Resolution V 0 1200 3 of reading 3 digits Nominal voltages 50 Vpc 100 Voc 250 Voc 500 Voc 1000 Voc Open circuit voltage 0 20 of nominal voltage Measuring current min 1 mA at RuzUux1 KO V Short circuit current max 3 mA The number of possible tests gt 1200 with a fully charged battery Auto discharge after test Specified accuracy is valid up to 100 MQ if relative humidity gt 85 In case the instrument gets moistened the results could be impaired In such case it is recommended to dry the instrument and accessories for at least 24 hours The e
38. element in selected level Function selector TEST Exits back to main function menu 54 MI 3125B EurotestGOMBO Data handling HELP Enters dialog box for deleting all measurements in selected location and its sub locations MEM Enters measurements field for deleting individual measurements Keys in dialog box for clearing results in selected location and its sub locations HELP Deletes all results in selected location sub location s Exits back to installation structure field menu without MEM changes Function selector Exits back to main function menu without changes TEST 6 5 3 Clearing individual measurements Select DELETE RESULTS in MEMORY menu DELETE FESULT DEJ B JECT 442 0 E D0 EOARD bay CIRJCIRCUIT bao Hao STATZ E 150 Figure 6 10 Menu for clearing individual measurement installation structure field selected Keys in delete results menu installation structure field selected Selects the location element Object D Board Circuit or IAS Bonding or Electrode UP DOWN Selects the location element in selected level Function selector TEST Exits back to main function menu MEM Enters measurements field Keys in delete results menu measurements field selected TAB Returns to installation structure field UP DOWN Selects measurement HELP Opens dialog box for confirmation to clear selected measurement Function selector Exits back to main function menu without
39. ent consider the following general warnings a The A symbol on the instrument means Read the Instruction manual with special care for safe operation The symbol requires an action If the test equipment is used in a manner not specified in this user manual the protection provided by the equipment could be impaired Read this user 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 or any of the accessories if any damage is noticed If a fuse blows in the instrument follow the instructions in this manual in order to replace it Consider all generally known precautions in order to avoid risk of electric shock while dealing with hazardous voltages Do not use the instrument in supply systems with voltages higher than 550 V Service intervention or adjustment is only allowed to be carried out by a competent authorized personnel Use only standard or optional test accessories supplied by your distributor Consider that older accessories and some of the new optional test accessories compatible with this instrument only meet CAT III 300 V overvoltage safety rating This means that maximal allowed voltage between test terminals and ground is 300 V The instrument comes supplied with rechargeable Ni Cd or Ni MH battery cells The cells should only be replaced with the same type as defined on the battery compartment
40. ent to electric installation After selecting the measurement you want to perform press the HELP key in order to view the associated Help menu Keys in help menu UP DOWN Selects next previous help screen HELP Scrolls through help screens Function selectors TEST Exits help menu 16 MI 3125B EurotestCOMBO Instrument description HELP Zlime Figure 3 6 Examples of help screens 3 4 7 Backlight and contrast adjustments With the BACKLIGHT key backlight and contrast can be adjusted Click Toggles backlight intensity level Locks high intensity backlight level until power is turned off or the key is pressed again Keep pressed for2s Bargraph for LCD contrast adjustment is displayed Keep pressed for 1 s LCD CONTRAST mu Figure 3 7 Contrast adjustment menu Keys for contrast adjustment DOWN Reduces contrast UP Increases contrast TEST Accepts new contrast Function selectors Exits without changes 17 MI 3125B EurotestCOMBO Instrument operation 4 Instrument operation 4 1 Function selection For selecting test function the FUNCTION SELECTOR shall be used Keys Select test measurement function VOLTAGE TRMS gt Voltage and frequency and phase sequence lt R ISO gt Insulation resistance FUNCTION lt Continuity gt Continuity of earth connections and bondings SELECTOR lt Zline gt Line impedance lt Zloop gt Fault loop impedance lt RCD gt RCD testing lt EARTH
41. es and low supply voltage This assures a safe operation of the overcurrent protection device in all conditions SET lt FACTOR In this menu the Z factor can be set factor EIEE Figure 4 7 Selection of Z factor Keys UP DOWN Sets Z value TEST Confirms Z value Function selectors Exits back to main function menu 4 2 7 Commander support con The support for remote commanders can be COMMON DE switched On Off in this menu Figure 4 6 Selection of commander support Keys UP DOWN Selects commander option TEST Confirms selected option Function selectors Exits back to main function menu Note u This option is intended to disable the commander s remote keys In the case of high EM interfering noise the operation of the commander s key can be irregular 23 MI 3125B EurotestCOMBO Measurements 5 Measurements 5 1 Compensation of test leads resistance This chapter describes how to compensate the test leads resistance in Continuity function Compensation is required to eliminate the influence of test leads resistance and the internal resistances of the instrument on the measured resistance The lead compensation is therefore very important to obtain correct result There are two separated calibration values one for ry fn r2 R4 R2 and Ro one for R4 Ru CAL The symbol is displayed in the Continuity message fields if the compensation was carried out successfully Circuits for co
42. eters for protection against electric shock Main earthing arrangements lightning systems local earthings etc can be 46 MI 3125B EurotestCOMBO Measurements verified with the earthing resistance test The measurement conforms to the EN 61557 9 standard EHRTH RE Ms See chapter 4 1 Function selection for instructions on key functionality FU m me il Ros 0 RP it in Figure 5 36 Earth resistance Test parameters for earth resistance measurement Maximum resistance OFF 1 O 5 ko Earth resistance measurements common measurement procedure Select salad function using the function selector switch Enable and set limit value optional Connect test leads to the instrument Connect the item to be tested see figures 5 37 5 38 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional gt a Ssss MPEC NN NN SN NS ASN gt 5d d Figure 5 37 Resistance to earth measurement of main installation earthing 47 MI 3125B EurotestCOMBO Measurements Figure 5 38 Resistance to earth measurement of a lighting protection system Rc l 9ku RPE Aki P Figure 5 39 Example of earth resistance measurement result Displayed results for earth resistance measurement p Earth resistance pio EE Resistance of S potential probe nic M Resistance of H current probe Notes a High resistance of S and H probes could influence the measuremen
43. f the fault is eliminated before proceeding with any activity Notes related to measurement functions General a The Ed indicator means that the selected measurement cannot be performed because of irregular conditions on input terminals Insulation resistance and continuity functions can only be performed on de energized objects a PASS FAIL indication is enabled when limit is set Apply appropriate limit value for evaluation of measurement results a n the case that only two of the three wires are connected to the electrical installation under test only voltage indication between these two wires is valid Insulation resistance a f voltages of higher than 10 V AC or DC is detected between test terminals the insulation resistance measurement will not be performed If voltages of higher than 10 V AC or DC is detected between test terminals the insulation resistance measurement will not be performed u The instrument automatically discharge tested object after finished measurement a A double click of TEST key starts a continuous measurement MI 3125B EurotestCOMBO Safety and operational considerations Continuity functions a f voltages of higher than 10 V AC or DC is detected between test terminals the continuity resistance test will not be performed u Before performing a continuity measurement where necessary compensate test lead resistance RCD functions a Parameters set in one function are also kept for o
44. l circuitry for continuity functions if test probes are connected to the mains supply voltage by mistake during measurement Warnings o A Disconnect all measuring accessory and switch off the instrument before opening battery fuse compartment cover hazardous voltage inside u Replace blown fuse with original type only otherwise the instrument may be damaged and or operator s safety impaired Position of fuses can be seen in figure 3 3 in chapter 3 3 Back side 7 2 Cleaning No special maintenance is reguired for the housing To clean the surface of the instrument use a soft cloth slightly moistened with soapy water or alcohol Then leave the instrument to dry totally before use Warnings u Do not use liguids based on petrol or hydrocarbons u Do not spill cleaning liguid over the instrument 7 3 Periodic calibration It is essential that the test instrument is regularly calibrated in order that the technical specification listed in this manual is guaranteed We recommend an annual calibration Only an authorized technical person can do the calibration Please contact your dealer for further information 7 4 Upgrading the instrument The instrument can be upgraded from a PC via the RS232 communication port This enables to upgrade the instrument to the latest available software version The upgrade can be carried with help of a special upgrading software and the communication cable as shown on figure 6 14 Please contact your d
45. label or as described in this manual Do not use standard alkaline battery cells while the power supply adapter is connected otherwise they may explode Hazardous voltages exist inside the instrument Disconnect all test leads remove the power supply cable and switch off the instrument before opening the battery compartment All normal safety precautions must be taken in order to avoid risk of electric shock while working on electrical installations MI 3125B EurotestCOMBO Safety and operational considerations A Warnings related to measurement functions Insulation resistance a Insulation resistance measurement should only be performed on de energized objects u Do not touch the test object during the measurement or before it is fully discharged Risk of electric shock u When an insulation resistance measurement has been performed on a capacitive object automatic discharge may not be done immediately The warning message and the actual voltage is displayed during discharge until voltage drops below 10 V u Do not connect test terminals to external voltage higher than 600 V AC or DC in order not to damage the test instrument Continuity functions u Continuity measurements should only be performed on de energized objects u Parallel mpedances or transient currents may influence test results Testing PE terminal a If phase voltage is detected on the tested PE terminal stop all measurements immediately and ensure the cause o
46. loor ES3Hn36 13H 7 z0 46 Y Result field D 46 Tao 4980 Lim 4 199 A D Izc 498H Limrd 1on ES3036 15A 5s Test parameter field 200 D e Giz Message field lt a L PE H 200 0 Terminal voltage Figure 3 5 Typical function 230 monitor display Battery indication 3 4 1 Terminal voltage monitor The terminal voltage monitor displays on line the voltages on the test terminals and information about active test terminals L PE M A211 00 231 L PE M S2310 D S 230 L FE H 231 n 230 Online voltages are displayed together with test terminal indication All three test terminals are used for selected measurement Online voltages are displayed together with test terminal indication L and N test terminals are used for selected measurement L and PE are active test terminals N terminal should also be connected for correct input voltage condition 3 4 2 Battery indication The indication indicates the charge condition of battery and connection of external charger I E Battery capacity indication Low battery Battery is too weak to guarantee correct result Replace or recharge the battery cells Recharging in progress if power supply adapter is connected 3 4 3 Message field In the message field warnings and messages are displayed EN X Measurement is running consider displayed warnings Conditions on the input terminals allow starting the
47. max time gt 40 ms Test c rr t Ae Yoxlan lan 2XlaN 5xlAN 5xlan is not available for lan 1000 mA RCD type AC or lan gt 300 mA RCD types A B 2xlan is not available for lan 1000 mA RCD type A or lan gt 300 mA RCD type B 1xlan is not available for l4y 21000 mA RCD type B Specified accuracy is valid for complete operating range 8 3 4 Trip out current Trip out current Complete measurement range corresponds to EN 61557 requirements Measuring range Resolution 0 2xlan 1 1xlan AC type 0 05xla 0 2xla 1 5xlan A type lan 230 mA 0 05xlAN 0 2xlaN 2 2xla A type lan lt 30 mA 0 05xlAN 0 2xlan 2 2xlan B type 0 05xlAN Trip out time Measuring range ms Resolution ms 0 300 Contact voltage Measuring range V Resolution V 0 0 19 9 0 41 0 99 15 99 of reading 10 digits 0 1 0 15 of reading The accuracy is valid if mains voltage is stabile during the measurement and PE terminal is free of interfering voltages Trip out measurement is not available for lAw 1000 mA RCD type B Specified accuracy is valid for complete operating range 8 4 Fault loop impedance and prospective fault current 8 4 1 No disconnecting device or FUSE selected Fault loop impedance Measuring range according to EN6155 is 0 25 O 9 99kQ Measuring range O Resolution O 0 00 9 99 0 01 0 Jr 10 0 99 9 100 999 1 00k
48. measurement consider other displayed warnings and messages Conditions on the input terminals do not allow starting the measurement consider displayed warnings and messages 15 MI 3125B EurotestCOMBO Instrument description RCD tripped out during the measurement in RCD functions Instrument is overheated The measurement is prohibited until the temperature decreases under the allowed limit Result s can be stored High electrical noise was detected during measurement Results may be impaired L and N are changed Warning High voltage is applied to the test terminals Warning Dangerous voltage on the PE terminal Stop the activity immediately and eliminate the fault connection problem before proceeding with any activity High resistance to earth of test probes Results may be impaired les eilfed I DI e En Test leads resistance in Continuity measurement is not compensated E Test leads resistance in Continuity measurement is compensated 3 4 4 Result field Measurement result is inside pre set limits PASS Measurement result is out of pre set limits FAIL OKS Measurement is aborted Consider displayed warnings and messages 3 4 5 Sound warnings Continuous sound Warning Dangerous voltage on the PE terminal is detected 3 4 6 Help screens HELP Opens help screen Help menus are available in all functions The Help menu contains schematic diagrams for illustrating how to properly connect the instrum
49. ments sese 17 Instrument operation mit an vata ntn xe rr x ER vs vas RR ROO OR CAR RR CR ADR 18 4 1 FACINI 1101 1 PICO OPC 5 SF O efte deinde 18 BZ llo RTL 19 4 2 1 EAI OU AC siete attests sal tins EUN ON PE O A EF ERR FU OY DN DN AR RTH Y RD NR 19 4 2 2 dip S FFF 19 4 2 3 MENO A A aia 21 4 2 4 BM za UN POP EE 21 4 2 5 RCO Standal Ore asses Pak sa ae Boe od A CN a OO 21 4 2 6 LITO NE DUR EFE TEA a Y THE FN FFA A epee 23 4 2 7 Gla aalgatciale cl 6 6 91910 tri NR RE eE 23 Measures a 24 5 1 Compensation of test leads resiStanCe ocooocooniocnconconconconiocinnonnnornonnonncancnnonoos 24 5 2 Voltage frequency and phase sequence ccccocccocccoccconcocnconconnonnconconnconcnnnononanos 25 o disuldtiol resiIStance sn i Y DG debe deba o ed GR eM tet 2 JA GONNA Io 29 29 RIO CONIL lacas 31 5 0 TESNO ROD Sirio 35 5 6 1 Contact voliage RC Dau eud ud ddd boi o ERREUR ERR Oed 36 5 6 2 Td enol ailan RODU E EH oF 5 6 3 THD OUt Current HOD os LG ed eee es 38 5 6 4 FACED FOTO Sh uu E iia 38 5 7 Fault loop impedance and prospective fault current 41 5 8 _ Line impedance and prospective short circuit current Voltage drop 43 5 8 1 Line impedance and prospective short circuit CUITONL 1 cccceccnseeecsesscaeeeeaneeees 44 5 8 2 VO AC Ke 0 o PERMET FARF O ROI FFF ANN ANF FAYN DYN 45 5 9 Earthresistance
50. mpensating the resistance of test leads Null Box PE PE L L E jJ extension lead Figure 5 1 Shorted test leads Compensation of test leads resistance procedure Select Continuity function Connect test cable to the instrument and short the test leads together appropriately see figure 5 1 Press CAL key to perform test lead compensation If the leads were successfully calibrated the resistance with old calibration data is displayed first and 0 000 afterwards CALIBRATION CALIBRATION Rin 1 000 Rin 0 000 Fiipe 1 000 Rire 0 0070 Figure 5 2 Results with old calibration Figure 5 3 Results with new calibration values values Note u The highest value for lead compensation is 5 O If the resistance is higher the compensation value is set back to default value CAL J is displayed if no calibration value is stored 24 MI 3125B EurotestCOMBO Measurements 5 2 Voltage freguency and phase seguence In the special VOLTAGE TRMS menu the measured voltage frequency and information about detected three phase connection are displayed Phase seguence measurement conforms to the EN 61557 7 standard NE TRMSI See chapter 4 1 Function selection for instructions on ln 1 231U f 58 8Hz key functionality zai Figure 5 4 Voltage in single phase system Test parameters for voltage measurement There are no parameters to set Connections for voltage measurement a OO O O o 5 y jJ L2 TF ANS
51. nd held test instrument intended to perform all the measurements required in order for a total inspection of electrical installations in buildings The following measurements and tests can be performed Voltage and freguency Continuity tests Insulation resistance tests RCD testing Fault loop RCD trip lock impedance measurements Line impedance Voltage drop Earth test Phase sequence DOO OC UD Oo The graphic display with backlight offers easy reading of results indications measurement parameters and messages Two LED Pass Fail indicators are placed at the sides of the LCD The operation of the instrument is designed to be as simple and clear as possible and no special training except for the reading this instruction manual is required in order to begin using the instrument In order for operator to be familiar enough with performing measurements in general and their typical applications it is advisable to read Metrel handbook Guide for testing and verification of low voltage installations The instrument is equipped with the entire necessary accessory for comfortable testing MI 3125B EurotestCOMBO Safety and operational considerations 2 Safety and operational considerations 2 1 Warnings and notes In order to maintain the highest level of operator safety while carrying out various tests and measurements Metrel recommends keeping your Eurotest instruments in good condition and undamaged When using the instrum
52. ompatibility EMC BS EN 61326 Electrical equipment for measurement control and laboratory use EMC requirements Class B Hand held equipment used in controlled EM environments 10 MI 3125B EurotestCOMBO Safety and operational considerations Safety LVD BS EN 61010 1 BS EN 61010 031 BS EN 61010 2 032 Functionality BS EN 61557 Safety reguirements for electrical eguipment for measurement control and laboratory use Part 1 General requirements Safety requirements for hand held probe assemblies for electrical measurement and test Safety requirements for electrical equipment for measurement control and laboratory use Part 2 032 Particular requirements for hand held and hand manipulated current sensors for electrical test and measurement Electrical safety in low voltage distribution systems up to 1000 Vac and 1500 Vac Equipment for testing measuring or monitoring of protective measures Part 1 General requirements Part 2 Insulation resistance Part 3 Loop resistance Part 4 Resistance of earth connection and equipotential bonding Part 5 Resistance to earth Part 6 Residual current devices RCDs in TT and TN systems Part Phase sequence Part 10 Combined measuring equipment Other reference standards for testing RCDs BS EN 61008 BS EN 61009 EN 60364 4 41 EN 60364 5 52 BS 7671 AS NZ 3760 Residual current operated circuit breakers without integral overcurrent protection for househol
53. or for Isc see chapter 4 2 6 44 MI 3125B EurotestCOMBO Measurements Un Input voltage range L N or L1 L2 110 V 93 V lt UL pe lt 134 V 230 V 185 V lt UL pe lt 266 V 400 V 321 V lt ULN lt 485 V Note u High fluctuations of mains voltage can influence the measurement results the noise sign HiH is displayed in the message field In this case it is recommended to repeat few measurements to check if the readings are stable 5 8 2 Voltage drop The voltage drop is calculated based on the difference of line impedance at connection points sockets and the line impedance at the reference point usually the impedance at the switchboard Circuits for measurement for voltage drop Figure 5 34 Phase neutral or phase phase voltage drop measurement connection of plug cable and 3 wire test lead Voltage drop measurement procedure Step 1 Measuring the impedance Zref at origin Select the MAM sub function using the function selector switch and A v keys Select test parameters optional Connect test cable to the instrument Connect the test leads to the origin of electrical installation see figure 5 34 Press the CAL key to perform the measurement Step 2 Measuring the voltage drop Select the YE sub function using the function selector switch and v keys Select test parameters Fuse type must be selected Connect test cable or plug commander to the instrument Connect the
54. otest procedure RCD Autotest steps Notes Select the Xela function using the function selector switch set sub function AUTO Set test parameters if necessary Connect test cable to the instrument Connect test leads to the to the item to be tested see figure 5 21 Press the TEST key to perform the test Start of test a Test with lan 0 step 1 a Re activate RCD mm a Test with lan 180 step 2 RCD should trip out a Re activate RCD a Test with 5xlan 0 step 3 RCD should trip out a Re activate RCD deine a Test with 5xlan 180 step 4 RCD should trip out a Re activate RCD a Test with 72xlAN 0 step 5 RCD should not trip out a Test with 2xlAN 180 step 6 RCD should not trip out a Trip out current test 0 step 7 RCD should trip out a Re activate RCD amie o Trip out current test 180 step 8 RCD should trip out a Re activate RCD ame u Store the result by pressing the MEM key optional End of test Result examples FR 36mA G PR 36mA G lide Ame me lide Ame 35 ms tjs n n tjs me me me Ey Son G CEDE Sonn G lide Ame 35 ome lide Ame 35 ome Moe Ta ms me woe farms 11 1m na gn ma 39 MI 3125B EurotestCOMBO Measurements Ey 36mA G Ey Sonn G lide Ame 35 ome lide Ame 35 ome woe farms 11 1m woe farma 11 1m yr gt SHAMS ma pre Shes 3B8mz I mH WHO x 200 o e ka 200 o M 8341
55. rror in operating conditions could be at most the error for reference conditions specified in the manual for each function 5 of measured value 8 2 Continuity amp Ring r4 r2 ry RitRe Rit Ry Measuring range according to EN6155 is 0 16 Q 1999 Q Measuring range R Q Resolution Q 0 00 19 99 3 96 of reading 3 digits 20 0 199 9 B 200 1999 ee Open circuit voltage 6 5 VDC 9 VDC Measuring current min 200 mA into load resistance of 2 Q Test lead compensation up to 5 O The number of possible tests gt 2000 with a fully charged battery Automatic polarity reversal of the test voltage 59 MI 3125B EurotestCOMBO Technical specification 8 3 RCD testing 8 3 1 General data Nominal residual current A AC 10 mA 30 mA 100 mA 300 mA 500 mA 1000 mA Nominal residual current accuracy 0 0 1 1A IA IAN 2xlAN 5xlAN O 1 IA 0 IA 0 5xlAN AS NZ selected 5 96 Test current shape oine wave AC pulsed A smooth DC B DC offset for pulsed test current 6 mA typical CD WY DG G non delayed S time delayed Test current starting polarity 0 or 180 Voltage range 95 V 266 V 45 Hz 65 Hz ANx12 3 ANx1 J ANx2 AN x5 RCDIA IAN mA JAC A B_ AC j
56. rtificates reports can be created with no or little modifications after downloading results to a PC FECALL FESULT DEJ B JECT bee D E TI BOARD bay CIRFJEIRCUIT mw Ho 5245 Is0 L E Figure 6 2 Installation structure and measurement fields Installation structure elements Memory operation menu DEJ OB JECT Baz D E Il POARI Hee Data structure field DIR LIRCLIIT H0S a 1 level CEMOEJECT GE OBJECT Default location name object and its successive number a 2 level D E I BOARD me D BOARD Default location name distribution board and its successive number a 3 level CIRCUIT Default location name circuit and its CIRICIRCUIT H09 successive number aaa ELECTRODE Default location name earth electrode BONDING xxx Default location names 7 bonding connections No of measurements in selected location Ho 28 112 No of measurements in selected location and its sub locations 51 MI 3125B EurotestCOMBO Data handling Measurement field No of selected test result No of all stored test results in Dia O selected location E ISO Type of stored measurement in the selected location 6 3 Storing test results After the completion of a test the results and parameters are ready for storing El icon is displayed in the information field By pressing the MEM key the user can store the results DE IB IECT Ba D E D BOBHET fae criR CIRCLIIT B E FREE
57. sted below Trip out times according to EN 61008 EN 61009 Vexla General RCDs Selective RCDs time delayed i gt 500 ms 130 ms lt ta lt 500 ms 60 ms lt ta lt 200 ms 50 ms lt t lt 150 ms Trip out times according to EN 60364 4 41 General RCDs selective RCDs time delayed t gt 999 ms 130 ms lt ta lt 999 ms 60 ms lt ta lt 200 ms 50 ms lt t lt 150 ms Trip out times according to BS 7671 Yoxlan rs er bn ae time delayed 1999 ms 130 ms lt ta lt 500 ms 60 ms lt t lt 200 ms 50 ms lt t lt 150 ms Trip out times according to AS NZ RCD type Ion m r lt t0 L 1 510 230 gt 999 ms EEN IV PE gt 30 gt 999 ms Minimum test period for current of Y xlan RCD shall not trip out Test current and measurement accuracy correspond to AS NZ requirements Maximum test times related to selected test current for general non delayed RCD Maximum test times related to selected test current for selective time delayed RCD Standard EN 61008 EN 61009 EN 60364 4 41 1000 ms 1000 ms BS 7671 2000 ms AS NZ IV 1000 ms 1000 ms 22 MI 3125B EurotestCOMBO Instrument operation 4 2 6 Z factor The impedance limit values for different overcurrent protective devices are scaled down by a factor 0 8 or 0 75 Z factor This means that the fault current will still be high enough also at increased conductor temperatur
58. surements For correct ring wiring the results must be approximately the same as reference value r1 rN 4 and r1 r2 4 The resistance R1 R2 slightly increases with length if cross section of PE conductor is smaller than of line conductor Commit results TAB key to R1 RN and R1 R2 positions Perform measurement on the next socket in final ring circuit Commit results TAB key again The results will be committed only if they are 33 MI 3125B EurotestCOMBO Measurements higher as the previous results The R1 RN and R1 R2 results can be cleared with the TAB key Repeat the measurement on all sockets of the final ring circuit The R1 RN and R1 R2 results can be cleared with the TAB key After the measurements are finished store the result optional RING REIFRH R1FR2 RING a E ao RItRH EA 34 B Sgi Rl R2 8 535 4 324 4 230 18 270 Figure 5 19 Examples of Ring Continuity test step 2 Displayed results R1 RN Reference test value committed and measured IS TISZ ina Reference test value committed and measured r1 r2 4 Calculated reference value r1 rN 4 Calculated reference value 34 MI 3125B EurotestCOMBO Measurements 5 6 Testing RCDs Various test and measurements are required for verification of RCD s in RCD protected installations Measurements are based on the EN 61557 6 standard The following measurements and tests sub functions can be performed Contact voltage
59. t leads PE and N connected together the instrument will display a warning of dangerous PE voltage The measurement will be performed anyway u Specified accuracy of tested parameters is valid only if mains voltage is stable during the measurement MI 3125B EurotestCOMBO Safety and operational considerations 2 2 Battery and charging The instrument uses six AA size alkaline or rechargeable Ni Cd or Ni MH battery cells Nominal operating time is declared for cells with nominal capacity of 2100 mAh Battery condition is always displayed in the lower right display part In case the battery is too weak the instrument indicates this as shown in figure 2 1 This indication appears for a few seconds and then the instrument turns itself off Too LOM 6 EU Figure 2 1 Discharged battery indication The battery is charged whenever the power supply adapter is connected to the instrument The power supply socket polarity is shown in figure 2 2 Internal circuit controls charging and assures maximum battery lifetime F a Figure 2 2 Power supply socket polarity The instrument automatically recognizes the connected power supply adapter and begins charging Symbols l Indication of battery charging Figure 2 3 Charging indication O A When connected to an installation the instruments battery compartment can contain hazardous voltage inside When replacing battery cells or before opening the battery fuse compartment cover disconne
60. t results In this case Rp and Rc warnings are displayed There is no pass fail indication in this case a High noise currents and voltages in earth could influence the measurement results The tester displays the noise warning in this case u Probes must be placed at sufficient distance from the measured object 5 10 PE test terminal It can happen that a dangerous voltage is applied to the PE wire or other accessible metal parts This is a very dangerous situation since the PE wire and MPEs are considered to be earthed An often reason for this fault is incorrect wiring see examples below When touching the TEST key in all functions that require mains supply the user automatically performs this test 48 MI 3125B EurotestCOMBO Measurements Examples for application of PE test terminal L1 Reversed phase and protection conductors THE MOST DANGEROUS ISITUATION W WWXWO DW VYSsW iC STN Figure 5 40 Reversed L and PE conductors application of plug cable L1 N EE a a E E EE j lt Reversed phase and protection conductors i MOST DANGEROUS i SITUATION Figure 5 41 Reversed L and PE conductors application of universal test cable PE terminal test procedure Connect test cable to the instrument Connect test leads to the to the item to be tested see figures 5 40 and 5 41 Touch PE test probe the TEST key for at least one second If PE terminal is connected
61. ther RCD functions u The measurement of contact voltage does not normally trip an RCD However the trip limit of the RCD may be exceeded as a result of leakage current flowing to the PE protective conductor or a capacitive connection between L and PE conductors a The RCD trip lock sub function function selector switch in LOOP position takes longer to complete but offers much better accuracy of fault loop resistance in comparison to the R sub result in Contact voltage function u RCD trip out time and RCD trip out current measurements will only be performed if the contact voltage in the pre test at nominal differential current is lower than the set contact voltage limit u The autotest sequence RCD AUTO function stops when trip out time is out of allowable time period Z LOOP a The low limit prospective short circuit current value depends on fuse type fuse current rating fuse trip out time and impedance scaling factor u The specified accuracy of tested parameters is valid only if the mains voltage is stable during the measurement u Fault loop impedance measurements will trip an RCD a The measurement of fault loop impedance using trip lock function does not normally trip an RCD However the trip limit may be exceeded as a result of leakage current flowing to the PE protective conductor or a capacitive connection between L and PE conductors Z LINE VOLTAGE DROP a In case of measurement of Ziine Line With the instrument tes
62. tificate Periodic Inspection Report etc The r4 ry ro R4 Rz and Re continuity tests are carried out between L and PE terminals in the same way regardless of which sub function is selected The R4 Ry continuity test is carried out between L and N terminals See chapter 4 1 Function selection for instructions on key functionality FU ees ees E u k o Y I Figure 5 10 Example R gt Test parameters for Continuity measurement Subfunction r1 r2 ru Ro R1 Ra RitRn Maximum resistance OFF 0 1 O 20 0 9 The Continuity measurement is performed with automatic polarity reversal of the test voltage according to IEC EN 61557 4 Test circuits for Continuity measurement MI 3125B EurotestCOMBO Measurements R4 RN Figure 5 11 Connections for testing the rj rw r2 and Ry Ry sections of the wiring in ring circuits Fa o ANJA g Wr am IL ar Extension lead Ro R4 Ro Figure 5 12 Connections for testing the R gt and R Re2 sections of the wiring in final circuits Continuity measurement procedure Select Continuity function using the function selector switch Set sub function with A V keys Enable and set limit optional Connect test cable to the the instrument Compensate the test leads resistance if necessary see section 5 3 1 Disconnect tested installation from mains supply Connect the test leads to the appropriate PE wiring see figures 5 11 and 5 1
63. ttery instrument normally until the instrument is fully discharged Repeat the charge discharge cycle Four cycles are recommended in order to at least 2 4 times restore the batteries to their normal capacity Notes u The charger in the instrument is a pack cell charger This means that the battery cells are connected in series during the charging The battery cells have to be equivalent Same charge condition same type and age a One different battery cell can cause an improper charging and incorrect discharging during normal usage of the entire battery pack it results in heating of the battery pack significantly decreased operation time reversed polarity of defective cell a If no improvement is achieved after several charge discharge cycles then each battery cell should be checked by comparing battery voltages testing them in a cell charger etc It is very likely that only some of the battery cells are deteriorated u The effects described above should not be confused with the normal decrease of battery capacity over time Battery also loses some capacity when it is repeatedly charged discharged Actual decreasing of capacity versus number of charging cycles depends on battery type This information is provided in the technical specification from battery manufacturer 2 3 Standards applied The Eurotest instruments are manufactured and tested in accordance with the following regulations Electromagnetic c

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