User Manuals
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1. Additional uncertainty according to 61557 3 Z esses Additional uncertainty according to IEC 61557 4 200 OPERATING MANUAL MZC 304 version 1 09 1 Safety The MZC 304 meter is designed for testing the protection against electric shock in the mains sys tems The meter is used to make measurements which results determine the electrical installation safety level Consequently in order to ensure safe operation and correct measurement results ob serve the following recommendations Before you proceed to operate the meter acquaint yourself thoroughly with the present manual and observe the safety regulations and recommendations of the manufacturer Any application that differs from those specified in the present manual may cause damage of the instrument and a serious hazard to its user The MZC 304 meters must be operated solely by appropriately qualified personnel with relevant certificates to perform measurements of electric installation Operation of the instrument by unau thorized personnel may result in damage to the device and constitute a hazard to the user Using this manual does not exclude the need to comply with occupational health and safety regu lations and with other relevant fire regulations required during the performance of a particular type of work Before starting the work with the device in special environments e g potentially fire risk explosive environme2. OPERATION MANUAL FAULT LOOP IMPEDANCE METER MZC 304 MZC 304 Measuring terminals Start the measurement MZC 304 Contact electrode SET SEL enter the meter settings select the numbers to change Move select Left Right Up Down Turn the meter on off to turn off keep the button depressed for a longer time turn the display backlight on off ESC return to the previous screen exit the function Validate ROTARY FUNCTION SELECTOR Select the measurement function 2 fault loop impedance measurement in L PE protected by a RCD 2 fault loop impedance measurement in L PE circuit 2 2 fault loop impedance measurement in L N or L L circuit U f voltage and frequency measurement Reonr resistance measurement of protective conductors and equipotential bondings R low voltage resistance measurement MEM view and erase memory and data transmission SSner OPERATING MANUAL FAULT LOOP IMPEDANCE METER MZC 304 SONEL SA ul Wokulskiego 11 58 100 Swidnica Version 1 09 27 06 2014 OPERATING MANUAL MZC 304 version 1 09 1 2 3 4 5 6 CONTENTS SAFETY S 5 MEASUREMENTS 22 588 cueva S Eae En en eo Ex a VR Re RO i oi 6 2 1 TURNING THE METER ON AND OFF DISPLAY BACKLIGHT eene 6 252 SELECTION OF GENERAL MEASUREMENT PARAMETERS eee 6 2 9
3. The person making a measurement must ensure that he she is standing on a non insulated floor du ring the measurement otherwise the result of the measurement may be incorrect The threshold value which triggers the signal of exceeded allowable voltage on PE conduit is ap proximately 50 V 8 OPERATING MANUAL MZC 304 version 1 09 2 7 Measurement of fault loop parameters A If there are residual current devices in the tested network they should be bypassed by bridging for the period of impedance measurement However it should be remembered that the tested circuit is modified in this way and the obtained results may slightly differ from the actual results Each time after completion of measurements modifications introduced to the installation for the period of measurements should be removed and operation of the residual current device should be checked The above remark does not apply to measurements of fault loop impedance with the use of the 2 function 2 7 1 Cable length selection W Turn the rotary switch to one of the loop impedance measure ment ranges 2 Set the parameters according to the following algorithm and according to the rules described in general parameters setting NOTE The WS 05 and WS 01 cables are detected by the meter and it is then impossible to select the cable length the symbol is displayed Using cables terminated with banana plugs before starting to measure select the
4. AA 4 pcs RR A EA 220x98x58 mm meter weigth m RE about 1 kg SIOragederiBel alio icm dais dese qo pecu ite 20 70 operaing temporalno WANE 090 20890 00 AAAA EA 0 50 20 80 rElELENCE 2 23 2 PETERS e nnt 40 60 altitude above sea level oed che s esi tt du redes adhi 2000 m CABO SCF cm EET 120 seconds number of measurements Z for rechargeable batteries gt 5000 2 measurements per minute ej LCD segment memory of measurement results 990 cells 10000 entries dala amen ede aure ELT radio link waveband ISM 433 MHz quality standard development design and manufacturing are ISO 9001 compliant the device meets the requirements of the IEC 61557 standard the product meets the EMC requirements immunity for industrial environment according to the Standards sses 61326 1 2006 61326 2 2 2006 9 2 Additional information Information about additional uncertainty is useful mainly when the meter is used in untypical con ditions and for the measurements laboratories during calibration 34 OPERA
5. REMEMBERING THE LAST MEASUREMENT RESULT 2 2 4 MEASUREMENT OF ALTERNATING VOLTAGE 2 21 21 2 2 7 00000000000 000000000444 7 2 5 MEASUREMENT OF VOLTAGE AND 0 0 6 8 2 6 CHECKING CORRECTNESS OF PE PROTECTIVE EARTH CONNECTIONS 9 2 7 MEASUREMENT OF FAULT LOOP PARAMETERS 00 9 2 44 Cable TEN OU AA 9 2 72 Prospective short circuit current aaa aaa aaa aaa aaa aaa nnne nna 10 237 3 Measurement of fault loop parameters the L N and L L circuits 10 2 7 4 Measurement of fault loop parameters the L PE circuit 13 2 422 Measurement of short circuit loop impedance in L PE circuit protected by a residual current sas estet ee oe edv abere dd 14 2 8 MEASUREMENT OF RESISTANCE TO EARTH 15 2 9 LOW VOLTAGE RESISTANCE 16 2 9 1 Measurement of continuity of protective conductors and equipotential bondings with 2200 mA CUFFOHEL ai et 17 2 9 2 Low current measurement of 6 9 18 2 9 5 Compensation of test leads resistance autozeroing ecce 19 MEMORY OF MEASUREMENT RESULT DATA eee eee eee eee eee eoe ose 21 3 STORING THE MEASUREMENT RE
6. Set the appropriate cell number to allow entering to a single cell of successive measurement results rela ting to a given measuring point facility Only the results of measurements activated by pressing the START button can be stored in the memory except autozeroing in low voltage resistance measurement It is recommended to delete the memory after reading the data or before performing a new series of measurements that may be stored in the same memory cells as the previous ones 3 1 Storing the measurement result data in the memory 1 i Press ENTER after completion of the measurement The meter is in the memory sto b ring mode Bank Cell ich Cell is empty P o The cell contains the result of the same type 1 which is to be entered OPERATING MANUAL MZC 304 version 1 09 21 The cell contains the measurement results of the displayed types The cell contains the Zr PE ROD measurement results of 4 all types s 4 Use 4 the gt buttons to view different types of results and their gt components Select the bank and cell number see section 3 2 or leave the current number Then press ENTER again The following screen appears for a moment accompanied by three short beeps and then the meter returns to di splay the last measurement result au Bank Cell ich 4 An atte
7. appro priate length of the phase conductor compatible with the length of cable used for measurement 4 9 L im Note Using cables from known manufacturers and selecting the correct length guarantees the declared measurement accuracy OPERATING MANUAL MZC 304 version 1 09 9 2 2 Prospective short circuit current The meter always measures impedance The short circuit current is calculated according to the following formula where Un mains rated voltage Zs measured impedance On the basis of Un rated voltage selected section 2 1 the meter automatically recognizes the measurement at phase to neutral or phase to phase voltage and takes it into account in the calcula tions If the voltage of the tested mains is outside the tolerance range the meter will not be able to de termine a proper rated voltage for the short circuit current calculation In such a case horizontal dashes will be displayed instead a short circuit current value The following diagram shows voltage ranges for which short circuit current value is calculated Voltage range for which the impedance is measured ee Se U 220V 198 220 242 342 380 418 440 U V 207 230 253 U 230V 360 sis UM 216 240 264 373 415 440 ry U 240V Voltage ranges for which the Voltage ranges U for which the short circuit current is calculated short circuit current is calculated 2 7 3 Measurement of fault loop para
8. charge indication depends on this setting the discharge characteri stics of disposable and rechargeable batteries are different NOTE Have the meter serviced in case of battery leakage inside the compartment Batteries must be recharged in an external charger OPERATING MANUAL MZC 304 version 1 09 29 5 3 General rules of using the Nickel Metal Hydride Ni MH batter les If you are not going to use the instrument for a longer time remove the rechargeable batteries and store them separately Store the rechargeable batteries in a dry cool and well ventilated place and protect them from direct sunlight The long storage temperature should be below 30 degrees C If the batteries are stored long at high temperatures the chemical processes may reduce their life The NiMH rechargeable batteries usually withstand 500 1000 charging cycles Such batteries achieve full capacity after forming 2 3 discharging and charging cycles The most important factor which influences the battery life is the discharge level The deeper the discharge level the shorter the battery life The memory effect appears in the NiMH batteries in a limited scope These batteries can be re charged without more serious consequences It is however recommended to discharge them com pletely every few cycles During the storage of the Ni MH rechargeable batteries they are subject to self discharge process at the rate of about 3096 a month Keeping the
9. tage measurement Meter turns off during the initial test Measurement errors No acclimatization after moving the meter from cold environment to warm and humid environment Check if the batteris are placed correctly replace and or recharge the batte ries If this does not help sent the meter for servi cing Do not perform the mea surements until the meter reaches the ambient tem perature about 30 minu tes and dries Sucessive results obta Incorrect connections in Check the connections ined in the same mea the tested mains and remove defects suring point are signifi cantly different from Mains with high noise or each other unstable voltage The meter indicates the Incorrectly selected test values close to zero leads in the meter set zero irrespective of the tings location of the measu rement and these valu es are significantly diffe rent than expected The PEsymbol does not Contact electrode is not appear although the functioning correctly or voltage between the the meter input circuits contact electrode and damaged the PE conductor exce Rotary switch in a wrong eds the detector position threshold about 50V Perform a larger number of measurements avera ge the results Return the meter for se rvicing he use of a mal functioning meter isunac ceptable Contact electrode is active for the measurements of the 4 fault loop para meters 28 OP
10. 58 100 Swidnica Poland tel 48 74 858 38 60 fax 48 74 858 38 09 E mail export 2sonel pl Web page www sonel pl NOTE Service repairs must be performed solely by the manufacturer OPERATING MANUAL MZC 304 version 1 09 505 502 Multifunction Multifunction Electrical Electrical MPI 525 655 Installations Installations ons Mete amn MES 2 2 y WY Resistance MRU 200 Resistivity hea TA Meter Earth Resistance TE v and Resistivity Meter E MIC 30 Insulation ua Insulation Resistance imager 222 32 PQM 701 805 TEE Power Datalogging 51 22 48 Portable Light quality analyzer Meter d EN aie CMP 1006 CMM 40 2 Digital Industrial Clamp on multimeter multimeter DIT 500 I LKZ 700 IR thermometer e Wire tracer OPERATING MANUAL MZC 304 version 1 09 39 40 NOTES OPERATING MANUAL MZC 304 version 1 09 WARNINGS AND GENERAL INFORMATION DISPLAYED BY THE METER NOTE MZC 304 meter is designd for operation at the 220V 230V and 240V rated phase to neutral voltage and the 380V 400V and 415V phase tophase voltage Connecting the voltage higher then allowed between any measuring terminals may damage the meter and be a hazard to the user READY The meter is ready for measurement Ln Voltage on terminals L and N is outside the measurable range PE Voltage on terminals L and PE is outside the measurable range Error duri
11. A 0 001 2 00 19 99A 0 01 Calculated on the basis of uncertainty for fault loop e Prospective fault current calculated and displayed by the meter may slightly differ from the val ue calculated by the user with a calculator basing on the displayed value of the impedance because the meter calculates the current from unrounded value of fault loop impedance which is used for displaying As the correct value consider Ik current value displayed by the meter or by firmware Measurement of fault loop impedance ZL pERCD without RCD tripping Measurement of fault loop impedance Zs Measuring range to IEC 61557 0 5 19990 for 1 2m leads WS01 i WS05 and 0 51 1999Q for 5m 10m and 20m leads e It will not trip RCD s of lan gt 30 mA Rated operating voltage Un 220V 230V 240V e Operating voltage range 180 270V Rated mains frequency fn 50Hz 60Hz Operating frequency range 45 65Hz Control of correctness of PE terminal connection by means of a contact electrode Fault loop resistance Rs and fault loop reactance Xs e Calculated and displayed for ZS lt 20Q Short circuit current Ik Test range according to IEC 61557 can be calculated on the basis of test ranges Zs and rated volta ges Calculated on the basis of uncertainty for fault loop Prospective fault current calculated and displayed by the meter may slightly differ from the val ue calculated by the user with a calculator basing on the di
12. ERATING MANUAL MZC 304 version 1 09 5 Power supply of the meter 5 1 Monitoring of the power supply voltage The charge level of the batteries or rechargeable batteries is indicated by the symbol in the right upper corner of the display on a current basis SII Batteries charged d 1 Batteries discharged bHE Replace or recharge the batteries Note e he bAt symbol in the display means that the supply voltage is too low and indicates that the bat teries must be replaced or recharged e Measurements performed with an insufficient supply voltage feature additional errors which the user is unable to evaluate 5 2 Replacement of batteries The MZC 304 is powered by four LR6 batteries or AA size rechargeable batteries They are placed in the compartment at the bottom of the enclosure WARNING Before replacing the batteries disconnect the test leads from the meter To replace the batteries 1 Disconnect the leads from the measuring circuit and turn off the meter 2 Remove the screw that secures the battery cover the bottom of the enclosure 3 Replace all batteries Observe the correct polarity when putting new batteries on the elastic part of the contact plate Reversed polarity will not damage the meter or the batteries but the meter will not work 4 Place and tighten the battery compartment cover NOTE After replacing the batteries always set the power supply type in the main MENU The correct
13. OO5REBB WAPRZO10REBB 5m lead red e 10m lead red WAPRZO20REBB WAADAWSO1 20m lead red e WS 01 adapter for triggering the measu rement with the UNI Schuko plug OPERATING MANUAL MZC 304 version 1 09 WASONYEOGB 1 WAKRORE20K02 e test prod with banana socket e crocodile red WAADAAGT16P five wire version WAADAAGT16C four wire version WAADAAGTS2P five wire version WAADAAGT32C four wire version e AGT 16P adapter for three phase soc kets AGT 32P adapter for three phase soc kets WAADAAGT63P five wire version AGT 6S3P adapter for three phase soc kets WAPROSONPE4 Odczyt danych z miernika e SONEL Electrical Measurements softwa WAPROSCHEM re for measurement reports CrN WAPROKALK ae mo WZ SONEL Schematic software for creating drawings electrical installation dia grams e SONEL Calculations software for measu rement calculations OPERATING MANUAL MZC 304 version 1 09 37 38 WAADAKEY1 LSWPLMZC304 e calibration certificate Pomiary Elektryczne oprogramowanie dla elektroinstalator w www pomiaryelektryczne pl adapter USB dongle for the software Note The software is supported by the following systems Windows XP Service Pack 2 Windows Vista Windows 7 11 Manufacturer The manufacturer of the device and provider of warranty and post warranty service SONEL S A ul Wokulskiego 11
14. SULT DATA IN THE MEMORY 21 3 2 CHANGING THE CELL AND 0 0020 0 0 0000441 41 000048 23 3 3 VIEWING MEMORY ywa asi ete gta oem ib eis Must uu deus 23 3 4 DELETING MEMORY DA EA i ost ton EE A EE 24 3 4 1 Delenne dank datus se 24 3 4 2 Deleting the whole memory sees 25 3 5 COMMUNICATION WITH A COMPUTER 2222 2 2 00000000000000000000000 26 3 5 1 Computer connection accessories 26 3 0 2 A ZOO ree 773732727227 26 TROUBLESHOOTING a 28 POWER SUPPLY OF THE METER 29 5 1 MONITORING OF THE POWER SUPPLY VOLTAGE seen eene 20 5 7 29 53 GENERAL RULES OF USING THE NICKEL METAL HYDRIDE NI MH BATTERIES 30 CLEANING AND MAINTENANCE 22000020000000000000000000000000000000000000000000000000 31 OPERATING MANUAL MZC 304 version 1 09 3 7 8 9 9 1 9 2 9 2 1 9 2 2 10 STORAGE DISMANTLING AND DISPOSAL TECHNICAL SPECIFICATIONS BASIC DATA ADDITIONAL INFORMATION EQUIPMENT eecencencencencencences 10 1 STANDARD EQUIPMENT 10 2 OPTIONAL ACCESSORIES 11 MANUFACTURER
15. TING MANUAL MZC 304 version 1 09 9 2 1 Additional uncertainty according to IEC 61557 3 Z Additional uncertaint 0 BAT is not displayed 1 2m lead 00 5m lead 0 0110 Temperature 0 35 C 10m lead 0 0190 20m lead 0 0350 WS 01 WS 05 leads 0 0150 Phase angle 0 30 at the bot tom of measurement range Frequency 99 101 Mains voltage 85 110 Supply voltage Temperature 0 35 C OPERATING MANUAL MZC 304 version 1 09 35 10 Equipment 10 1 Standard equipment Standard set of equipment supplied by the manufacturer includes MZC 304 meter WMPLMZC304 set of test leads adapter WS 05 with angle plug UNI SCHUKO CAT III 300V WAADAWS05 leads 1 2m CAT 1000V with banana plugs 3 pcs yellow WAPRZ1X2YEBB red WAPRZ1X2REBB and blue WAPRZ1X2BUBB accessories crocodile clip CAT III 1000V 1 pc yellow K02 WAKROYE20K02 test prod with banana socket CAT II 1000V 2 pcs rad WASONREOGB1 and blue WASONBUOGB 1 adapter the receiver for radio transmission OR 1 WAADAUSBOR1 rigid hanger with a hook WAPOZUCH1 carrying case for the meter and accessories WAFUTM6 meter harness WAPOZSZEA SONEL CD OPERATING MANUAL warranty card calibration certificate 4 LR6 batteries 10 2 Optional accessories Additionally the following items that are not included in the scope of standard equipment can be purchased from the manufacturer or the distributors 36 WAPRZ
16. ad other that the lead with a mains socket is se lected Additional information displayed by the meter Error messages and information as for the L N and L L measurement 2 5 Measurement of short circuit loop impedance in L PE circuit protected by a residual current device RCD The MZC 304 enables the fault loop impedance measurements without altering the mains protec ted by RCD s with the rated current of at least 30mA Turn on the meter Turn the rotary switch to the ZL PE posi tion Depending on needs select the measurement parameters according to section 2 7 1 3 Connect the test leads according to one of the drawings 14 OPERATING MANUAL MZC 304 version 1 09 Remaining issues connected with the measurements are the same as those described for measu rements of the L PE circuit Note Maximum measurement time is about 32 seconds The measurement can be interrupted by pressing the ESC button In the electrical installations with 30 mA RCD s the sum of leakage currents of the installation and the test current may trip the RCD If this happens try to reduce the leakage current in the tested mains for example by disconnecting loads Additional information displayed by the meter Error messages and information as for the L N and L L measurement 2 8 Measurement of resistance to earth The MPI 502 meter can be used for approximate measurements of resistance to earth For this purpose the phase cond
17. available detergents Do not use any solvents and cleaning media which could scratch the casing powder paste etc The probes can be cleaned with water and then wiped dry Before longer storage it is recom mended to lubricate the probes with any machine grease Clean the spools and leads with water and detergents then wipe dry The meter electronic system is maintenance free 7 Storage When storing the instrument observe the following recommendations disconnect all leads from the meter thoroughly clean the meter and all accessories wind long test leads onto the spools if you are not going to use the instrument for a longer time remove the batteries during a prolonged storage recharge the batteries from time to time to prevent total discharging 8 Dismantling and disposal Used electric and electronic equipment should be collected selectively i e not placed with other types of waste Used electronic equipment shall be sent to the collection point according to the Used Electric and Electronic Equipment Act Before sending the instrument to the collection point do not dismantle any parts by yourself Observe local regulations on disposal of packagings and used batteries OPERATING MANUAL MZC 304 version 1 09 31 9 Technical specifications 9 1 Basic data Abbreviation used in the specification of measurement uncertainty means a standard mea sured value Voltage measurement Range Resolution Measurem
18. batteries at high temperatures may accelerate this pro cess even two times In order not to allow an excessive discharging of the batteries after which the forming will be needed recharge the batteries once in a while even unused batteries Modern fast chargers detect too low and too high temperature of the batteries and respond accord ingly If the temperature is too low the charging process should not start as it might irrevocably dam age a rechargeable battery The battery temperature increase is a signal to stop the charging and is typical In addition to faster temperature increase of a battery which will not be fully charged charging at high ambient temperatures results however in a reduced life Remember that with fast charging the batteries are charged to about 8096 of their capacity better results can be achieved by continuing the charging process the charger then goes into the small cur rent charging mode and after a few hours the batteries are fully charged Do not charge and do not use the batteries at extreme temperatures as they reduce the life of batter ies Avoid using the battery powered devices in very hot places The rated operating temperature must be observed at all times 30 OPERATING MANUAL MZC 304 version 1 09 6 Cleaning and maintenance NOTE Use only the maintenance methods presented by the manufacturer in this manual Clean the meter casing and the case with a wet cloth using generally
19. changed or the measuring function is changed by means of the ro tary switch or the meter is switched off When you go to the output screen of a given function with the ESC button you can recall this result by pressing ENTER Similarly you can view the latest measu rement result after turning off and then turning on the meter 2 4 Measurement of alternating voltage The meter measures and displays alternating mains voltage in all measuring functions except R This voltage is measured for the frequencies within the range of 45 65 Hz The test leads should be connected as for a given measuring function OPERATING MANUAL MZC 304 version 1 09 7 2 5 Measurement of voltage and frequency W 22 Rese z Set the rotary switch in the U f E position ES au 2 Read the result of measurement the U voltage on the secon Ll dary display field the frequency on the principal When the meter is connected as in the the dra wing touch the contact electrode with your finger and wait for about 1 second When voltage if fo und on PE the meter displays the PE symbol er ror in the installation PE connected to the phase conductor and generates a continuous audio si gnal This option is available for the ZL pE mea surements Note WARNING When a dangerous voltage is detected on PE conductor measurements must be immedia tely stopped and a fault in the installation must be removed
20. damage of the measuring terminal and additional measuring errors Note An attempt to install drivers in 64 bit Windows 8 may result in displaying Installation failed message Cause Windows 8 by default blocks drivers without a digital signature Solution Disable the driver signature enforcement in Windows OPERATING MANUAL MZC 304 version 1 09 Note Due to continuous development of the meter software the display view for some functions may be a bit different from the view shown in this manual 2 Measurements WARNING During the fault loop measurements the earthed parts and parts accessible in the electri cal installation being tested must not be touched WARNING During a measurement switching of the range switch is forbidden because it may damage the meter and pose a threat to the user 2 1 Turning the meter on and off display backlight Briefly press the button to turn on the meter Press it for a longer time to turn it off OFF is displayed Press briefly the O button during meter operation to turn on off the display and keypad backlight 2 2 Selection of general measurement parameters W Keeping the SET SEL button de pressed turn on the meter and wait for 1 the parameter selection screen 4 35 Use the AV buttons to change the parameter value The value or symbol to be changed is Use the 4 gt buttons to go to the next param eter mm on os ts E Y 9 The YE symb
21. ditional information displayed by the meter The tested facility is live The measurement is blocked Immediately disconnect the meter from the facility both conductors 20 OPERATING MANUAL MZC 304 version 1 09 3 Memory of measurement result data MZC 304 meters are equipped with the memory that can store 10000 single measurement re sults The whole memory is divided into 10 memory banks each of them containing 99 memory cells Thanks to dynamic memory allocation each of the memory cells can contain different quantity of sin gle measurement results depending on the needs Optimal use of the memory can be ensured in this way Each measurement result can be stored in a memory cell marked with a selected number and in a selected memory bank Thanks to this the user of the meter can at his her discretion assign me mory cell numbers to individual measurement points and the memory bank numbers to individual faci lities The user can also perform measurements in any sequence and repeat them without losing other data Memory of measurement result data is not deleted when the meter is switched off Thanks to this the data can be later read or sent to a computer The number of a current memory cell or memo ry bank is not changed either Note Results of measurements performed for all measuring functions can be stored in one memory cell After each entry of the measurement result to the cell its number is automatically incremented
22. ed according to section 3 2 St the cell number to before 1 The dEL sym bol appears which indica tes the readiness to dele te Press ENTER Cz d Bank Cell jg The onf and A symbols appear asking you to con firm deletion 24 OPERATING MANUAL MZC 304 version 1 09 4 Press ENTER to start deleting or ESC to abort The deletion pro CED gress is shown on Bank Cell the display as scrol ling cell numbers JH When deletion is complete the meter generates three short beeps and sets the cell number j to 1 AER Turn on the meter Turn the rotary switch to the MEM position 2 Cz a Bank Cell Set the bank number to before 0 The symbol UL L appears which indi cates the readiness to de lete L 3 i Press ENTER e A 4 i Press ENTER to start deleting or ESC The onf and A symbols appear asking you to con firm deletion to abort OPERATING MANUAL MZC 304 version 1 09 25 CED deletion pro gress is shown on the display as scrolling bank and cell numbers When deletion is complete the me ter generates three short beeps and sets the cell num ber to 1 Bank Cell 3 5 Communication with a computer 3 5 1 Computer connection accessories What is necessary in order to operate the meter with a computer is addi
23. ent uncertainty 0 0 299 9V 2 m v 6 digits 300 500V 2 m v 2 digits e Frequency range 45 65Hz Frequency measurement Range Resolution Measurement uncertainty 45 0 65 0Hz 0 1 m v 1 digit Voltage range 50 500V Measurement of fault loop impedance ZL PE ZL N 21 1 Measurement of fault loop impedance Zs Test range according to IEC 61557 Test lead Measurement range Zs 0 13 1999 0 17 1999 0 21 1999 0 20 0 29 1999 0 WS 01 05 0 19 1999 0 Display range 5 m v 3 digits 5 m v 3 digits 5 m v 3 digits Rated operating voltage Unt n 220 380V 230 400V 240 415V Operating voltage range 180 270V for Zi pgi ZL N and 180 460V for 211 Rated mains frequency fn 50Hz 60Hz Operating frequency range 45 65Hz Maximum test current 7 6 A for 230 8x10ms 13 3 A for 400V 3x10ms Control of correctness of PE terminal connection by means of a contact electrode applicable to Z PE Fault loop resistance Rs and fault loop reactance Xs Display range Measurement uncertainty 0 00 19 99 5 5 digits of Zs value 20 0 199 9 5 5 digits of Zs value Calculated and displayed for 25 lt 200 32 OPERATING MANUAL MZC 304 version 1 09 Short circuit current Ik Test range according to IEC 61557 can be calculated on the basis of test ranges Zs and rated volta ges Display range Measurement uncertainty 0 110 1 999
24. he tested earthing system it can be concluded that the earthing has been made correctly and and there is no need for a more accurate measurement methods 2 9 Low voltage resistance measurement A The meter can be damaged if connected to the voltage exceeding 500V 16 OPERATING MANUAL MZC 304 version 1 09 2 9 1 Measurement of continuity of protective conductors and equipotential bondings with 200 mA current W Turn on the meter Turn the rotary switch to the Rcowr position The meter is ready for measurement Connect test leads according to the dra wing ORO 160 Activate the measurement by pressing the START button The measurement starts automatically for resistances lower than 300 Read the measurement result which is the arithme tic mean of two measure ments with 200mA current flowing in opposite direc tions RcoNT OPERATING MANUAL MZC 304 version 1 09 17 Additional information displayed by the meter The tested facility is live The measurement is blocked Immediately disconnect the meter from the facility both conductors Huge noise in the system during the measurement The NOISE measurement result may be affected by a large unspeci fied error gt s Measuring range is exceeded 2 9 2 Low current measurement of resistance Turn on the meter Turn the rotary switch to the Rx position The meter is ready for measure
25. ment L Connect test leads according to the dra wing ORO U E 18 OPERATING MANUAL MZC 304 version 1 09 4 am Read the measurement result R R Q 41 Additional information displayed by the meter The tested facility is live The measurement is blocked tha Immediately disconnect the meter from the facility both conductors Huge noise in the system during the measurement The NOISE measurement result may be affected by a large unspeci fied error Measuring range is exceeded 2 9 3 Compensation of test leads resistance autozeroing i zx 7 2 Set the autozeroing according to the following algorithm Turn on the meter Turn the rotary switch to the Rcowr or Rx posi tion R orR 4 402 AUTO ZERO 3 Short the test leads Activate the autozeriong by pressing the START button OPERATING MANUAL MZC 304 version 1 09 19 After completion of auto zeroing the meter auto matically switches to the ready for measurement RcoNT mode Note The message remains on the display after switching into one of the measurement func tions resistance or continuity measurement indicating that the measurement is made with compen sated least leads resistance To remove the compensation perform the above mentioned activities but with open test leads When you enter the measurement screen the message will not be displayed Ad
26. meters in the L N and L L circuits Turn on the meter Turn the rotary switch to the ZL L 21 position 2 Depending on needs select cable length according to section 2 7 1 10 OPERATING MANUAL MZC 304 version 1 09 Connect test le ads according to the drawing a for measu rement in the L N circuit or b for measu rement in the L L circuit The meter is ready for measurement 4 READY Phase conductor le ngth or the sym bol UL n UL L voltage Make the measurement by pressing the START button U Read the main measu rement result fault loop impedance Zs and the mains voltage at the ti me of measurement To read additional results press the D button OPERATING MANUAL MZC 304 version 1 09 11 r au L Ic Ik JP short circuit current au R R W W 9 fault loop e 0 resistance U IL a X XL wa UNA fault loop reactance e 0 Note Enter the result into memory see sections 3 1 and 3 2 or press ESCto return to go to the voltage measurement When many measurements are made at short time intervals the meter may emit a large amount of heat As a result of this the enclosure of the device may become hot This is normal and the meter is equipped with the protection against excessive temperature Minimum interval between successive measurements is 5 seconds This is c
27. mpt to overwrite causes the warning symbol to appear au Bank Cell 22 OPERATING MANUAL MZC 304 version 1 09 Press ENTER to overwrite the result or ESC to abort Note Complete set of results main result and supplementary results for a given measuring function and measurement settings are stored in the memory 3 2 Changing the cell and bank number W Press ENTER after completion of the measurement The meter is in the memory sto b 1 ring mode Bank Cell c cell number is flas ing Tochange use the A and V buttons Press SET SEL Bank Cell The bank number is flas hing change use the A and buttons Press SET SEL The cell number is flashing again Turn on the meter Turn the rotary switch to the MEM position OPERATING MANUAL MZC 304 version 1 09 23 The content of the last saved cell Bank Cell Spp The cell number is flashing Use the SET SEL buttons and then the A V buttons to change the number of the bank and cell which intent you want to view If the bank or cell number is flas hing its number can be changed L L INK e 2 2 Use the 4 and gt buttons to 4 view different types of results N their components 3 4 Deleting memory data 3 4 1 Deleting bank data Turn on the meter Turn the rotary switch to the MEM position Set the bank number to be delet
28. ng the measurement Lr ri Error during the measurement voltage dip after the measurement Short circuit malfunction Conductor N is not connected Huge noise in the system during the measurement The measurement result may be affected by a large unspecified error The temperature inside the meter has risen above the limit The measurement is blocked Ty The L and N conductors have been switched voltage between terminals PE and N The tested facility is live The measurement is blocked Immediately disconnect the meter from the facility both conductors Indication of battery level Batteries charged Batteries low Batteries fully discharged Replace or recharge the batteries SONEL S A Wokulskiego 11 St 58 100 Swidnica Poland pow 48 74 85 83 860 48 74 85 83 800 fax 48 74 85 83 808 http www sonel pl e mail export sonel pl
29. nt it is necessary to consult it with the person responsible for health and safety It is unacceptable to operate the following gt meter which is completely or partially out of order leads with damaged insulation ameter which ahs been stored to long in unsuitable conditions for example is wet When the meter is transferred from cold environment to warm and humid one do not make measure ments until the meter warms up to the ambient temperature about 30 minutes Remember that the message on the display means that the power supply voltage is too low and indicates the need to replace charge the batteries The measurements performed with the meter with insufficient supply voltage have additional measuring errors which are impossible to be evaluated by the user and cannot be the basis to determine the correct protection of the tested in stallation Do not leave the discharged batteries in the meter as they can leak and damage the instrument Before starting the measurement check if the leads are connected to correct measuring termi nals Never use the meters with open or only partially closed battery compartment cover and use only the power supplies specified in this manual Repairs may be performed solely by an authorized service outlet NOTE Use only standard and optional accessories intended for a given instrument which are listed in the Equipment section Using other accessories may cause
30. ol indicates an active parameter the na symbol indicates an inactive 2 Set the parameters according to the following algorithm 6 OPERATING MANUAL MZC 304 version 1 09 A 7 240 900 A A 230V BUU A ALLU 0 ww i 7 7 4 220V 4b 45 11 40 A v T gt ao on ao Change of blinking digit RS Next digit Supply Mains calculating Auto i Software Parameter voltage lik rated OFF Change PIN A Buzzer updating measured Symbol s UN UFF Pn GUPP L N 3 Press ENTER to validate the changes and to the measurement function or press ESC to go the measurement function witho ut validating the changes Note Before the first measurements select the mains rated voltage Un 220 380V 230 400V or 240 415V used in in the area where measurements are performed This voltage value is used for calculating the values of prospective short circuit current if this option was chosen from the main menu The symbol means that no auto off time has been set PIN settings see section 3 5 2 Data Transmission Use OR 1 receiver section 3 5 1 to update the software New software may be downloaded from www sonel pl 2 3 Remembering the last measurement result Result of the latest measurement is remembered by the meter until a next measurement is star ted or measurement settings are
31. ontrolled by the meter which displays the READY message informing that the measurement can be made Additional information displayed by the meter READY The meter is ready for measurement ben Voltage on terminals L is outside the measurable range Voltage on terminals L and PE is outside the measurable range Error during the measurement 12 OPERATING MANUAL MZC 304 version 1 09 Error during the measurement voltage dip after the measure ment HO Short circuit malfunction Conductor N is not connected rement result may be affected by a large unspecified error measurement is blocked L and conductors have been switched voltage between terminals PE and 2 4 Measurement of fault loop parameters in the L PE circuit Turn on the meter Turn the rotary switch to the 2 position Connect the test leads according to one of the drawings Checking effectiveness of protection against electric shock of the enclosure in case of a TN b TT OPERATING MANUAL MZC 304 version 1 09 13 The meter is ready for measurement 4 READY Phase conductor le ngth or the f sym bol voltage 5 Make measurement by pressing the START button Remaining issues connected with the measurements are the same as those described for measu rements in L N circuit or L L circuit Note Double lead measurement is possible when a test le
32. splayed value of the impedance because the meter calculates the current from unrounded value of fault loop impedance which is used for displaying As the correct value consider Ik current value displayed by the meter or by firmware OPERATING MANUAL MZC 304 version 1 09 33 Low voltage continuity and resistance measurement Measurement of continuity of protective conductors and equipotential bondings with 200 mA current Measurement range according to IEC 61557 4 0 Measurement uncertainty 0 00 19 99 2 m v 3 digits Voltage at open terminals 4 9V Output current at R lt 2Q min 200 Isc 200 250 Compensation of test leads resistance Measurements for both current polarizations Low current resistance measurement Range Resolution Measurement uncertainty 0 9990 200 19990 Voltage at open terminals 4 9V Short circuit current Isc 8 15 Audio signal for measured resistance lt 300 50 Compensation of test leads resistance Other technical specification 2S 2 e272 2 292290233575 typeof insulation double EN 61010 1 and IEC 61557 compliant measurement IV 300V III 600V EN 61010 1 compliant degree of protection of enclosure acc to EN 60529 IP67 meter power supply LR6 alkaline batteries or NiMH rechargeable batteries size
33. tional accessories na mely an OR 1 receiver and appropriate software If this package has not been purchased along with the meter it can be bought from the manufacturer or an authorized distributor where detailed software information is also available 3 5 2 Data transmission 1 Connect the OR 1 module to the USB socket of the Turn on the meter Turn the rotary switch to the MEM position 3 Press SET SEL for about 2 seconds the meter will ask you to activate the radio transmission Press ENTER the radio transmission screen will appear 26 OPERATING MANUAL MZC 304 version 1 09 To transmit data follow the instructions of the software Press ESC to exit the transmission mode Note A Standard pin for OR 1 is the 123 Settings in the meter according to section 2 2 OPERATING MANUAL MZC 304 version 1 09 27 4 Troubleshooting Before returning the instrument for repair call the service perhaps the meter is not damaged and the problem has occurred for another reason The meter repairs should be carried out only in the outlets authorized by the manufacturer The following table describes the recommended procedure in certain situations that occur when using the meter Measuring The meter will not start Discharged or incor after pressing the rectly placed batteries button rechargeable batteries The bAksymbol is di splayed during the vol
34. uctor is used as a secondary source of voltage which generates test current Connection diagram for the instrument for such measurement in the TN C TN S and TT systems is shown in the figure below OPERATING MANUAL MZC 304 version 1 09 15 During the measurement check the connections of the measured earth electrode with the electri cal installation For correct measurement the tested earthing systm should be disconnected from the electrical installation N and PE conductors If you want to measure the earth electrode for instance in the TN C S system and simultaneously use the phase of the same system as a secondary source of current disconnect the PE and N conductors from the measured earth electrode see figure below Otherwise the meter will measure an incorrect value the test current will flow not only through the measured earthing system L1 L2 L3 N PE Note WARNING Disconnection of protective conductors is a serous life hazard for the staff performing the measurements and also third parties When the measurements are completed the protec tive and neutral conductors MUST be reconnected If it is not possible to disconnect the conductors use an earth resistance meter from the MRU range As the measurement result is the sum of impedances of the measured earth electrode working ear thing system source and phase conductor it contains a positive error However if such error does not exceed a limit value for t
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