METREL MI 3122 Instruction Manual Download

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MI 3122 Smartec Z Line-Loop / RCD

Technical specifications

Prospective short-circuit current (calculated value)

Measuring range (A)

Resolution (A)

Accuracy

0.00



0.99

0.01

Consider accuracy of line

resistance measurement

1.0



99.9

0.1

100



999

1.00k



99.99k

100k



199k

1000

Test current (at 230 V) ...................... 6.5 A (10 ms)
Nominal voltage range ...................... 30 V



500 V (45 Hz



65 Hz)

8.4 Voltage, frequency, and phase rotation

8.4.1 Phase rotation

Nominal system voltage range .......... 100 V



550 V

Nominal frequency range .................. 15 Hz



500 Hz

Result displayed ............................... 1.2.3 or 3.2.1

8.4.2 Voltage

Measuring range (V)

Resolution (V)

Accuracy



550



(2 % of r 2 digits)

Result type ........................................ True r.m.s. (trms)
Nominal frequency range .................. 0 Hz, 15 Hz



500 Hz

8.4.3 Frequency

Measuring range (Hz)

Resolution (Hz)

Accuracy

15.0



499.9

0.1



(0.2 % of r 1 digit)

Nominal voltage range ...................... 20 V



550 V

8.5 Online terminal voltage monitor

Measuring range (V)

Resolution (V)

Accuracy



550



(2 % of r 2 digits)

Summary of Contents for MI 3122

Page 1: ...Z Line Loop RCD MI 3122 Instruction manual Version 1 4 Code no 20 751 245 ...

Page 2: ...uipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2013 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 ...

Page 3: ...ories 17 3 5 1 Standard set 17 3 5 2 Optional accessories 17 4 Instrument operation 18 4 1 Function selection 18 4 2 Settings 19 4 2 1 Language 19 4 2 2 Initial settings 20 4 2 3 Memory 21 4 2 4 Date and time 21 4 2 5 RCD standard 21 4 2 6 Isc factor 23 4 2 7 Commander 23 5 Measurements 24 5 1 Testing RCDs 24 5 1 1 Contact voltage RCD Uc 25 5 1 2 Trip out time RCDt 26 5 1 3 Trip out current RCD I ...

Page 4: ...nt 47 8 2 1 No disconnecting device or FUSE selected 47 8 2 2 RCD selected 48 8 3 Line impedance and prospective short circuit current 48 8 4 Voltage frequency and phase rotation 49 8 4 1 Phase rotation 49 8 4 2 Voltage 49 8 4 3 Frequency 49 8 5 Online terminal voltage monitor 49 8 6 General data 50 A Appendix A Fuse table 51 A 1 Fuse table IPSC 51 A 2 Fuse table impedances UK 53 A 3 Fuse table Im...

Page 5: ...age frequency and phase sequence Line impedance Loop impedance RCD protection 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 unit is clear and simple the operator does not need any special training except reading this instruction manual to operate ...

Page 6: ...etent authorized person Use only standard or optional test accessories supplied by your distributor Consider that older and some of new optional test accessories compatible with this instrument meet overvoltage category CAT III 300 V It means that maximum allowed voltage between test terminals and ground is 300 V Instrument contains rechargeable NiCd or NiMh battery cells The cells should only be ...

Page 7: ...e RCD Z LOOP The Z LOOP impedance function will trip out the RCD in RCD protected installation that is tested Use the Zs rcd impedance function to prevent the trip out The Zs rcd impedance function takes longer time to complete but has much better accuracy then RL sub result in RCD Uc function Specified accuracy of tested parameters is valid only if mains voltage is stable during the measurement L...

Page 8: ...y is shown in figure 2 2 Figure 2 2 Power supply socket polarity The instrument automatically recognizes the connected power supply adapter and begins charging Symbols Indication of battery charging Figure 2 3 Charging indication Before opening battery compartment cover disconnect all measuring accessories connected to the instrument and switch off the instrument Insert cells correctly otherwise t...

Page 9: ...ery charger Notes 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 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 pac...

Page 10: ... IEC EN 61010 031 Safety requirements for hand held probe assemblies for electrical measurement and test Functionality IEC EN 61557 Electrical safety in low voltage distribution systems up to 1000 V a c and 1500 V d c Equipment for testing measuring or monitoring of protective measures Part 1 General requirements Part 3 Loop resistance Part 6 Residual current devices RCDs in TT and TN systems Part...

Page 11: ... MEM Store recall clear tests in memory of instrument 6 Function selectors Selects test function 7 Backlight Contrast Changes backlight level and contrast 8 ON OFF Switches the instrument power on or off The instrument automatically turns off 15 minutes after the last key was pressed 9 HELP DISPLAY Accesses help menus In RCD Auto toggles between top and bottom parts of results field 10 TAB Selects...

Page 12: ...power supply adapter socket communication connectors 3 Charger socket Connection of power supply adapter 4 USB connector Communication with PC USB 1 1 port 5 PS 2 connector Communication with PC serial port and connection to optional measuring adapters Warnings Maximum allowed voltage between any test terminal and ground is 600 V Maximum allowed voltage between test terminals is 600 V Maximum shor...

Page 13: ...tment cover 3 Fixing screw for battery compartment cover 4 Back panel information label 5 Holder for inclined position of the instrument 6 Magnet for fixing instrument close to tested item optional Figure 3 4 Battery compartment Legend 1 Battery cells Size AA alkaline or rechargeable NiMH NiCd 2 Serial number label ...

Page 14: ... 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 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 ...

Page 15: ...out of pre set limits FAIL 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 The help menus contain some basic schematic connection diagrams to illustrate recommended connection of the instrument to the electrical installation and information about ...

Page 16: ...ight intensity level Keep pressed for 1 s Locks high intensity backlight level until power is turned off or the key is pressed again Keep pressed for 2 s Bargraph for LCD contrast adjustment is displayed 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 ...

Page 17: ...aration of conformity Mains measuring cable Universal test cable Three test tips Three alligator clips Set of NiMH battery cells Power supply adapter CD with instruction manual and Guide for testing and verification of low voltage installations handbook Soft hand strap 3 5 2 Optional accessories See the attached sheet for a list of optional accessories that are available on request from your distr...

Page 18: ...ts 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 ...

Page 19: ... reference standard for RCD test Entering Isc factor Support of commanders UK version 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 Language The instrument supports different languages Figure 4 2 Language selection Keys UP DOWN Selects language TEST Confirms selected language and exi...

Page 20: ...e custom made settings will be lost The default setup is listed below Instrument setting Default value Contrast As defined and stored by adjustment procedure Isc factor except in UK version 1 00 Z factor UK version only 0 8 RCD standards EN 61008 EN 61009 Language English Function Parameters limit value Sub function Z LINE Fuse type none selected Z LOOP Fuse type none selected Zs rcd Fuse type non...

Page 21: ...ser to set the date and time of the unit 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 RCD normative reference can be selected by this optio...

Page 22: ...ms Trip out times according to AS NZS 3017 I N I N 2 I N 5 I N RCD type I N mA t t t t Note I 10 999 ms 40 ms 40 ms 40 ms Maximum break time II 10 30 300 ms 150 ms 40 ms III 30 300 ms 150 ms 40 ms IV S 30 999 ms 500 ms 200 ms 150 ms 130 ms 60 ms 50 ms Minimum non actuating time Minimum test period for current of I N RCD shall not trip out Test current and measurement accuracy correspond to AS NZS ...

Page 23: ...ent of the Isc factor is 0 20 3 00 Notes If not defined by other regulations the recommended value for Isc factor is 0 75 0 80 This value helps to consider the maximum working temperature for the installation and heating of the wires during a fault In UK version impedance scaling factor Z is used instead of prospective short fault scaling factor Isc 4 2 7 Commander Selecting this option the suppor...

Page 24: ...ensitivity I N 10 mA 30 mA 100 mA 300 mA 500 mA 1000 mA type RCD type test current waveform plus starting polarity MUL Multiplication factor for test current 1 2 5 I N Ulim Conventional touch voltage limit 25 V 50 V Notes 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 r...

Page 25: ... the rated I N Contact voltage measurement procedure Select the RCD function using the function selector switch Set sub function Uc Set test parameters if necessary Connect test cable to the top of the instrument Connect test leads to the item to be tested see figure 5 2 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional The contact voltage result relat...

Page 26: ... out time RCDt Trip out time measurement verifies the sensitivity of the RCD at different residual currents Trip out time measurement procedure Select the RCD function using the function selector switch Set sub function RCDt Set test parameters if necessary Connect test cable to the top of the instrument Connect test leads to the item to be tested see figure 5 2 Press the TEST key to perform the m...

Page 27: ...itch Set sub function RCD I Set test parameters if necessary Connect test cable to the top of the instrument Connect test leads to the item to be tested see figure 5 2 Press the TEST key to perform the measurement Store the result by pressing the MEM key optional Trip out After the RCD is turned on again Figure 5 5 Trip out current measurement result example Displayed results I Trip out current Uc...

Page 28: ...with I N 0 step 1 RCD should trip out Re activate RCD Test with I N 180 step 2 RCD should trip out Re activate RCD Test with 5 I N 0 step 3 RCD should trip out Re activate RCD Test with 5 I N 180 step 4 RCD should trip out Re activate RCD Test with I N 0 step 5 RCD should not trip out Test with I N 180 step 6 RCD should not trip out Trip out current test 0 step 7 RCD should trip out Re activate RC...

Page 29: ...Step 6 trip out time I N 180º I Step 7 trip out current 0º I Step 8 trip out current 180º Uc Contact voltage for rated I N Notes The autotest sequence is immediately stopped if any incorrect condition is detected e g excessive Uc or trip out time out of bounds Auto test is finished without x5 tests in case of testing the RCD type A with rated residual currents of I n 300 mA 500 mA and 1000 mA In t...

Page 30: ... chapter 4 1 Function selection for instructions on key functionality Figure 5 8 Fault loop impedance Test parameters for fault loop impedance measurement Test Selection of fault loop impedance sub function Zloop Zs rcd Fuse type Selection of fuse type NV gG B C K D Fuse I Rated current of selected fuse Fuse T Maximum breaking time of selected fuse Lim Minimum short circuit current for selected fu...

Page 31: ... prospective short circuit current value or high limit fault loop impedance value for the UK version Prospective fault current ISC is calculated from measured impedance as follows Z k Un I SC SC where Un Nominal UL PE voltage see table below ksc Correction factor for Isc see chapter 4 2 6 Un Input voltage range L PE 110 V 93 V UL PE 134 V 230 V 185 V UL PE 266 V Notes High fluctuations of mains vo...

Page 32: ...Maximum breaking time of selected fuse Lim Minimum short circuit current for selected fuse See Appendix A for reference fuse data Connections for measurement of line impedance L1 L2 L3 N PE RE Ro L PE N L L1 N L2 PE L3 N L2 L L1 PE L3 Figure 5 12 Phase neutral or phase phase line impedance measurement connection of plug commander and universal test cable Line impedance measurement procedure Select...

Page 33: ...the UK version Prospective short circuit current is calculated as follows Z k Un I SC SC where Un Nominal L N or L1 L2 voltage see table below ksc Correction factor for Isc see chapter 4 2 6 Un Input voltage range L N or L1 L2 110 V 93 V UL N 134 V 230 V 185 V UL N 266 V 400 V 321 V UL L 485 V Note High fluctuations of mains voltage can influence the measurement results the noise sign is displayed...

Page 34: ... to the EN 61557 7 standard See chapter 4 1 Function selection for instructions on key functionality Figure 5 14 Voltage in single phase system Test parameters for voltage measurement There are no parameters to set Connections for voltage measurement L3 L2 L1 N PE N L2 N L2 L L1 L L1 PE L3 PE L3 result 1 2 3 result 2 1 3 Figure 5 15 Connection of universal test cable and optional adapter in three ...

Page 35: ...ly after selection of VOLTAGE TRMS function Figure 5 17 Examples of voltage measurement in three phase system Displayed results for single phase system Uln Voltage between phase and neutral conductors Ulpe Voltage between phase and protective conductors Unpe Voltage between neutral and protective conductors f frequency Displayed results for three phase system U12 Voltage between phases L1 and L2 U...

Page 36: ...wiring see examples below When touching the TEST key in all functions that require mains supply the user automatically performs this test Examples for application of PE test terminal L1 N PE Reversed phase and protection conductors T MOST DANGEROUS SITUATION HE Figure 5 18 Reversed L and PE conductors application of plug commander L1 N Reversed phase and protection conductors MOST DANGEROUS SITUAT...

Page 37: ...l is connected to phase voltage the warning message is displayed instrument buzzer is activated and further measurements are disabled in Z LOOP and RCD functions Warning If dangerous voltage is detected on the tested PE terminal immediately stop all measurements find and remove the fault Notes In the SETTINGS and VOLTAGE TRMS menus the PE terminal is not tested PE test terminal does not operate in...

Page 38: ...tructure element object and block and fuse This organization helps to handle with data in a simple and effective manner The main advantages of this system are Test results can be organized and grouped in a structured manner that reflects the structure of typical electrical installations Simple browsing through structures and results Test reports can be created with no or little modifications after...

Page 39: ...MI 3122 Smartec Z Line Loop RCD Memory organization 39 Measurement field Type of stored measurement in the selected location No of selected test result No of all stored test results in selected location ...

Page 40: ...number of selected location element 1 to 199 MEM Saves test results to the selected location and returns to the measuring menu Function selectors TEST Exits back to main function menu Notes The instrument offers to store the result to the last selected location by default If the measurement is to be stored to the same location as the previous one just press the MEM key twice 6 4 Recalling test res...

Page 41: ...Exits back to main function menu Keys in recall memory menu measurements field selected UP DOWN Selects the stored measurement MEM Displays measurement results Function selectors TEST Exits back to main function menu Figure 6 5 Example of recalled measurement result Keys in recall memory menu measurement results are displayed UP DOWN Displays measurement results stored in selected location MEM TES...

Page 42: ...in function menu without changes Figure 6 7 Clearing memory in progress 6 5 2 Clearing measurement s in selected location Select DELETE RESULTS in MEMORY menu Figure 6 8 Clear measurements menu data structure field selected Keys in delete results menu data structure field selected TAB Selects location element Object Block Fuse Enters measurements field UP DOWN Selects number of selected location e...

Page 43: ...a structure field selected Keys in delete results menu measurements field selected TAB Returns to data structure field UP DOWN Selects measurement TEST Opens dialog for confirmation to clear selected measurement Function selectors MEM Exits back to main function menu without changes Keys in dialog for confirmation to clear selected result s TEST Deletes selected measurement result MEM Exits back t...

Page 44: ...2 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 Switch 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 d...

Page 45: ...ned with soapy water or alcohol Then leave the instrument to dry totally before use Warnings Do not use liquids based on petrol or hydrocarbons Do not spill cleaning liquid over the instrument 7 2 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...

Page 46: ... A AC A AC A 10 5 3 5 10 20 20 40 50 100 30 15 10 5 30 42 60 84 150 212 100 50 35 100 141 200 282 500 707 300 150 105 300 424 600 848 1500 n a 500 250 175 500 707 1000 1410 2500 n a 1000 500 350 1000 1410 2000 n a n a n a n a not applicable AC type sine wave test current A type pulsed current 8 1 2 Contact voltage RCD Uc Measuring range according to EN61557 is 20 0 V 31 0V for limit contact voltag...

Page 47: ...ement range corresponds to EN 61557 requirements Measuring range I Resolution I Accuracy 0 2 I N 1 1 I N AC type 0 05 I N 0 1 I N 0 2 I N 1 5 I N A type I N 30 mA 0 2 I N 2 2 I N A type I N 30 mA Trip out time Measuring range ms Resolution ms Accuracy 0 300 1 3 ms Contact voltage Measuring range V Resolution V Accuracy 0 0 19 9 0 1 0 15 of reading 10 digits 20 0 99 9 0 15 of reading The accuracy i...

Page 48: ... Measuring range Resolution Accuracy 0 00 9 99 0 01 5 of reading 10 digits 10 0 99 9 0 1 100 999 1 10 of reading 1 00k 9 99k 10 Accuracy may be impaired in case of heavy noise on mains voltage Prospective fault current calculated value Measuring range A Resolution A Accuracy 0 00 9 99 0 01 Consider accuracy of fault loop resistance measurement 10 0 99 9 0 1 100 999 1 1 00k 9 99k 10 10 0k 23 0k 100...

Page 49: ...tage frequency and phase rotation 8 4 1 Phase rotation Nominal system voltage range 100 VAC 550 VAC Nominal frequency range 15 Hz 500 Hz Result displayed 1 2 3 or 3 2 1 8 4 2 Voltage Measuring range V Resolution V Accuracy 0 550 1 2 of reading 2 digits Result type True r m s trms Nominal frequency range 0 Hz 15 Hz 500 Hz 8 4 3 Frequency Measuring range Hz Resolution Hz Accuracy 15 0 499 9 0 1 0 2 ...

Page 50: ...ts matrix display with backlight Dimensions w h d 14 cm 8 cm 23 cm Weight 0 9 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 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 ...

Page 51: ...18 2 1590 6 315 7766 8 6066 6 4985 1 4096 4 2272 9 400 10577 7 7929 1 6632 9 5450 5 2766 1 500 13619 10933 5 8825 4 7515 7 3952 7 630 19619 3 14037 4 11534 9 9310 9 4985 1 710 19712 3 17766 9 14341 3 11996 9 6423 2 800 25260 3 20059 8 16192 1 13545 1 7252 1 1000 34402 1 23555 5 19356 3 16192 1 9146 2 1250 45555 1 36152 6 29182 1 24411 6 13070 1 Fuse type gG Rated current A Disconnection time s 35m...

Page 52: ...it current A 0 5 5 5 5 5 2 7 1 10 10 10 10 5 4 1 6 16 16 16 16 8 6 2 20 20 20 20 10 8 4 40 40 40 40 21 6 6 60 60 60 60 32 4 10 100 100 100 100 54 13 130 130 130 130 70 2 15 150 150 150 150 83 16 160 160 160 160 86 4 20 200 200 200 200 108 25 250 250 250 250 135 32 320 320 320 320 172 8 40 400 400 400 400 216 50 500 500 500 500 270 63 630 630 630 630 340 2 Fuse type K Rated current A Disconnection ...

Page 53: ...loop impedance Max loop impedance 3 12 264 12 264 6 6 136 6 136 6 3 064 3 064 10 3 68 3 68 10 1 84 1 84 16 2 296 2 296 16 1 152 1 152 20 1 84 1 84 20 0 92 0 92 25 1 472 1 472 25 0 736 0 736 32 1 152 1 152 32 0 576 0 576 40 0 92 0 92 40 0 456 0 456 50 0 736 0 736 50 0 368 0 368 63 0 584 0 584 63 0 288 0 288 80 0 456 0 456 80 0 232 0 232 100 0 368 0 368 100 0 184 0 184 125 0 296 0 296 125 0 144 0 14...

Page 54: ... 472 0 4 5 40 1 08 Max loop impedance 50 0 832 5 7 664 14 16 63 0 656 15 2 04 4 28 80 0 456 20 1 416 3 064 100 0 368 30 0 872 2 112 125 0 272 45 1 272 160 0 224 60 0 896 200 0 152 100 0 424 All impedances are scaled with factor 0 8 A 3 Fuse table Impedances at 230 V a c AS NZS 3017 Type B Type C Rated current A Disconnection time s Rated current A Disconnection time s 0 4 0 4 Max loop impedance Ma...

Page 55: ...ance Max loop impedance 6 3 07 6 11 50 15 33 10 1 84 10 6 39 9 20 16 1 15 16 3 07 5 00 20 0 92 20 2 09 3 59 25 0 74 25 1 64 2 71 32 0 58 32 1 28 2 19 40 0 46 40 0 96 1 64 50 0 37 50 0 72 1 28 63 0 29 63 0 55 0 94 80 0 23 80 0 38 0 68 100 0 18 100 0 27 0 48 125 0 15 125 0 21 0 43 160 0 12 160 0 16 0 30 200 0 09 200 0 13 0 23 All impedances are scaled with factor 1 00 ...

Page 56: ...able accessories Optional with ordering code A Line impedance Universal test cable Plug commander A 1272 Mains measuring cable Tip commander A 1270 Three phase adapter A 1111 Fault loop impedance Universal test cable Plug commander A 1272 Mains measuring cable Tip commander A 1270 Three phase adapter A 1111 RCD testing Universal test cable Plug commander A 1272 Mains measuring cable Three phase ad...

Page 57: ...dification type Note AUS NZ 4 2 2 4 2 6 5 2 5 3 Appendix A Appended AUS NZ fuse table added C 2 Modification issues C 2 1 AUS NZ modification Fuse types according to AS NZS 3017 Modifications of the chapter 4 2 2 The default setup is listed below Instrument setting Default value Z factor 1 00 RCD standards AS NZS 3017 Modifications of the chapter 4 2 6 C 2 1 1 Z Factor In this menu the Z factor ca...

Page 58: ...ult loop impedance value Prospective fault current IPFC is calculated from measured impedance as follows factor scaling Z U I PE L N PFC _ where Un Nominal UL PE voltage see table below scalling_factor Correction factor for Isc set to 1 00 Un Input voltage range L PE 110 V 93 V UL PE 134 V 230 V 185 V UL PE 266 V Modifications of the chapter 5 3 Modified test parameters for line impedance measurem...

Page 59: ...dance value Prospective fault current IPFC is calculated from measured impedance as follows factor scaling Z U I L N L N PFC _ where Un Nominal UL N or UL1 L2 voltage see table below Scalling factor Correction factor for Isc set to 1 00 Un Input voltage range L N or L1 L2 110 V 93 V UL N 134 V 230 V 185 V UL N 266 V 400 V 321 V UL L 485 V ...

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METREL MI 3122, Instruction Manual

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