User Manuals
Contents
1. Fig 1 MZC 310S front panel layout 4 4 1 Terminals CAUTION MZC 310S is designed to operate at rated phase voltages of 220V and 230V and inter phase voltages of 380V and 400V Applying voltages higher than those specified to any of the test terminals can damage the device 1 Test terminal 1 Imax 280A Terminal to connect the phase current cable in the four pole method of the short circuit loop impedance measurement using current not exceeding 280A 2 Test terminal Imax 42A Socket to connect the phase current cable in the two pole method of the short circuit loop impedance measurement using current not exceeding 42A 3 Test terminal l2 Terminal common for both methods to connect the neutral cable N protective cable PE PEN current cable in the four pole method or another phase cable in a case of a short circuit loop impedance meas urement in the phase phase configuration 4 Test terminal U Terminal to connect the voltage phase cable in the four pole method of short circuit loop impedance measurement or a cable to measure alternating voltage Test terminal U2 Terminal to connect the voltage neutral cable N or the protective cable PE PEN in the four pole meth od of short circuit loop impedance measurement or the cable to measure alternating voltage Test term2. e After selecting the YES option press the key 12 Ki the screen will display a message Dele tion of the selected cell as well as a progress bar When deletion is completed a message will be displayed Cell deleted and the meter will produce three short beeps In order to delete an entire bank you need to e Get the rotary switch 9 to the MEM position e Select Bank deletion e Using the keys D and select the bank number Press the key 12 EJ The screen will display a prompt asking if you want to erase the entire bank e After selecting the YES option press the key 12 Ki the screen will display a message Dele tion of the whole bank and a progress bar When deletion is completed a message will be dis played Bank deleted and the meter will produce three short beeps In order to delete the whole memory you need to e Set the rotary switch 9 to the MEM position e Select Memory deletion from the menu e Press the key 12 Ei The screen will display a prompt asking whether you want to erase the whole memory After selecting YES press the key 12 2 the screen will display a message Deletion of the whole memory and a progress bar When deletion is completed a message will be displayed Whole memory deleted and the meter will produce three short beeps In order to cancel the deletion press the key 14 esc 3
3. Fig 9 Alternating voltage measurement 17 18 Fig 12 Measurement of impedance in working circuit L L using two pole method Fig 15 Measurement of impedance in working circuit L L using four pole method 19 Fig 16 Verification of anti shock protection reliability of appliance s housing using two pole method for a TN networks b TT networks 20 Fig 17 Verification of the anti shock protection reliability of appliance s housing using four pole method for a TN networks b TT networks L1 L2 L3 Fig 18 Measurement of touch voltage Ust 21 Fig 19 Measurement of shock voltage Ur 7 6 Measurement of Alternating Voltage CAUTION Applying voltage in excess of 440V to any of the test terminals may damage the device To measure alternating voltage e Connect the test cables to sockets 4 U and 5 U2 Fig 9 e Set the rotary switch 9 to position UL The measurement result is displayed as shown in Fig 2 The instrument measures alternating voltage with the frequency between 45Hz and 65Hz as True RMS without separating a possible constant component Voltage with the frequency lower than 45Hz is measured as direct voltage If the frequency of the run being measured is not included within the specified limits instead of its value an app
4. e Measurement of very low short circuit loop impedances with a current of 150A at 230V maximum 280A at 440V Raw 1 5 e Touch voltage and touch shock voltage measurement e Ability to perform a measurement with a current of 23A at 230V maximum 42A at 440V Raw 10Q e Measurements in installations with rated voltages between 220 380V and 230 400V and frequen cies 45 65Hz e Selection of rated voltage 220V 380V or 230V 400V e Ability to perform measurements in short circuit system phase phase phase protective phase neutral e Automatic calculation of the short circuit current e Differentiation between the phase voltage and the inter phase voltage while calculating the short circuit current Automatic choice of measurement range Ability to change the length of measurement cables without a need to re calibrate the instrument Measurement of alternating voltages Memory to store 990 measurement results with an ability to transfer them to PC via an RS 232C connection Large legible LCD with a backlit option Monitoring battery s charge status Automatic switch off when the instrument is not used AUTO OFF Ergonomic design 4 2 Standard Accessories The e device is supplied in a kit that contains MZC 310S meter WMPLMZC310S Set of measuring conductors 1 2 m black conductor with pin plugs WAPRZ1X2BLBB 1 2 m yellow conductor with pin plugs WAPRZ1X2YEBB Black test prod with a female connector WASONBLOGB1 Yellow te
5. AR ege graphical LCD 192x64 dots p Quality standard 1 development design and manufacturing to ISO 9001 compliant q The instrument meets the requirement of the IEC 61557 standard 11 2 Manufacturer The manufacturer of the device provides all warranty and after warranty repairs SONEL S A ul Wokulskiego 11 58 100 widnica Poland tel 48 74 858 38 60 fax 48 74 858 38 09 E mail export sonel pl Web page www sonel pl Note Only the manufacturer is authorized to carry out service repairs 39 40 Multifunction Electrical ALLONS IVIGLG MRU 200 Earth Resistance and Resistivity Met MIC 2 Insulation Resistance Meter PQM 701 Power quality analyzer e 1 a o CMM 40 Industrial multimeter MRU 20 Earth Resistance and Resistivity Meter Dada atalogging Light Meter DIT 500 IR thermometer MPI 505 Multifunction Electrical Installations Meter CMP 1006 Digital Clamp on multimeter MPI 502 Multifunction Electrical Installations Meter MIC 30 Insulation Resistance Meter MMR 630 Microohmeters MIC 2510 Insulation Resistance Meter PAT 805 Portable appliance tester LKZ 700 Wire tracer
6. CAUTION The function is intended exclusively for users with a high level of computer literacy The warranty does not cover any malfunctions of the device that result from incorrect applica tion of this function To update the software you need to Download the software from the manufacturer s web site www sonel pl e Connect the meter to the PC e On the device MENU select the function Software upgrade and confirm that you have read the information displayed e Install and then launch the software on the PC e Select the port in the program activate the option Connection test and then start the option Programming e Follow the instructions displayed by the software CAUTION For the duration of the software upgrade operation replace the batteries with the new ones The user must not turn off the meter nor disconnect the communications cables during the procedure Note l During the programming operation the keyboard except for key 8 is inoperative In this function the meter does not switch off automatically 33 7 10 7 Information About The Manufacturer And The Software By activating this submenu the user may obtain the basic information about the meter manufac turer and the software version 7 11 Sending Data to a Computer 7 11 1 Communications Kit In order to interface the meter with a computer an optional communications kit is required a serial cable and
7. SSner OPERATING MANUAL SHORT CIRCUIT LOOP IMPEDANCE METER MZC 310S CE SONEL SA ul Wokulskiego 11 58 100 Swidnica Version 3 4 TABLE OF CONTENTS 1 PREFACEG arcana ee ege DEENEN 5 2 INTRODUCTION viz tte ebe een 6 3 SAFETY eeneg eege Eeer 6 4 DEVICE DESCRIPTION AND ITS FUNCTIONALITY 112 2 6 4 1 MZC 310S CHARACTERISTICS ccccceeceeeeeeeeceeeeeceaeeeeaaeeeeeeeeeeeesaeeseeeeneaees 6 4 2 STANDARD ACCESSORIES eee ae auua aan eee aaa aaa aaa aaa aaaa a aeenaaennae 7 4 3 1OPTIONAL AGCESSORIES nian Maen ind ee a adie ZES 7 4 4 TERMINALS AND KEYS LAYOUT aaa aaa aaa aaa aaa zaawan aaa aa aaa aaaaaaani ania 8 4 4 1 Ee EE EE 8 4 4 2 Keyboard merr a a a s 9 4 5 GRAPHICAL DISPLAY PANEL LCD 10 4 6 BUZZER EEE A EAE MAR IAE E A RT ee 11 4 7 TEST a DEA E EE A E A E AEE E 12 5 STORE ege egeeet Neger atedeves becbesbusecdadeensteueese 13 6 BEFORE YOU START wie ege zee r d dee e 13 7 OPERATIONS tace oi oset ce ee at ieee ieee cee 14 7 1 PREPARING THE DEVICE FOR Wonk aaa aa aa aaa aaa aaaaaa aaa aaaaaazazawzaa aaa 14 7 2 POWER SUPPLY VOLTAGE MONITORING ssssssseseseserrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrern 15 7 3 BATTERY REPLACEMENT sccccccccecssssececceceetecseseeeeceseeeasseseeeesecacssensees 15 7 4 CONDITIONS FOR PERFORMING TESTS AND OBTAINING CORRECT RESULTS 16 7 5 DEVICE CONNECTION DIAGDAMS an az an aa an an an az anazazazazazazzzizizizina 17 7 6 MEASUREMENT OF ALTERNATING VOLTAGE sse
8. Settings eeeeeee eee oaza aa aan aaenaeiea 32 7 A 0 5 Language Selecto N EE 32 7 10 6 Advanced FUNCTIONS 2 ccccecsceceserceeeseecenenensenenensensnsnnseseneneesseeesenensrneetenes 32 7 10 6 1 Expected Dispersion of Results cccseeeeeneeteeneeeeteneeeeeneeetenneeesteneeeenie 32 7 10 6 2 Upgrading The Software csccccccccesceseeeeeeneeceneeesneeteeeceeessneeseneeesieeseneetenes 33 7 10 7 Information About The Manufacturer And The Software 34 7 11 SENDING DATA TO A COMPUTER 34 ZIT Communications Kit eseu ENEE EENS EEN eva 34 7 11 2 Connecting The Meter To A Computer 34 8 TROUBLE SHOOTING E 35 8 1 WARNINGS AND INFORMATION DISPLAYED BY HE METER n sansnannnnnnnsnenna 35 8 1 1 Exceeding The Measurement Hange eee aeaaa aa zzaacanca 35 8 1 2 Battery Status Display ses O O Ao 35 8 2 SELF TEST ERROR MESSAGES uuu aeua aaa aa aaa een aaa aaa aaenaae 35 8 3 BEFORE YOU SEND THE DEVICE FOR REPAIRS nsnnsssnnnnnnennseinnnnnnenneene 35 9 CLEANING AND MAINTENANCE 2 ss ennsa oeennaaooeennaaooeennaaca 36 10 DECOMMISSIONING AND RECYCLING 222 ss osnanseoozaaassocza 36 11 APPENDICES O OOO 37 11 1 TECHNICAL SPECIFICATIONS aa uuaaaaaa nana aaa aa aaa a aaa aaa aaa aaa aaa aaa aaaaazazazanaaa 37 T2 MANUFACTURER ewa aaa TOO a een Ne dE 39 1 Preface Thank you for purchasing our short circuit loop impedance meter MZC 310S is a st
9. other free cell the user should press the key 14 ec Successful memory entry is signalled with the symbol short beeps are produced 19 displayed on the screen and three While filling the last cell in the given bank instead of displaying the symbol 19 will show a text Last cell in the bank 7 9 2 Memory Browsing gt the screen In order to view the measurement results stored in the memory the user should set the rotary switch 9 to the position MEM Choose Review from the menu The screen will display the contents of the recently filled cell Fig 5 Using the keys D and the user can select the bank number 29 he she wishes to review and using the keys and the cell number If the cell is not filled hori zontal lines will be displayed instead of the memory cell contents 7 9 3 Erasing the memory You can erase the whole memory individual banks or single cells In order to delete a cell you need to e Set the rotary switch 9 to the position MEM e Select Delete cell e Using keys and choose the bank number and using keys and the cell number you want to delete Fig 25 Cell 8 in bank Fig 25 Deleting a memory cell 1 bank No 8 cell No 1 bank with at least one cell used 8 acell in use Press the key 12 EJ The screen will display a prompt asking if you want to erase the cell
10. short circuit loop impedance or a short circuit current If the impedance has been selected the first of the auxiliary results will be the current otherwise it will be the impedance Fig 3 To select the value to be displayed you need to e Press the key 13 MEN e Select Display settings e Inthe Main result option select and save the value type to be displayed impedance or current see section 7 10 4 MENU The device always measures impedance and the short circuit current displayed is calculated from the formula U I z where U rated voltage of the network being tested Zs impedance measured The meter automatically recognizes the measurement for inter phase voltage 380V or 400V and takes it into account in calculations In a case when the installation voltage is outside of tolerance the meter will not be able to deter mine the rated voltage for the short circuit current calculation In such event the display will show hori zontal dashes instead of the short circuit current value Fig 7 shows voltage ranges for which the short circuit current is calculated Voltage ranges for which impedance is measured ch E 230 400 180 70 260 340 380 420440 U V eg emmer 190 270 360 Voltage ranges for which short circuit current is calculated Fig 20 Relationship between the network voltage and the ability to calculate the short ciruit current Further in this document the term impedan
11. 0 7 10 Menu The menu is available in any position of the rotary switch with the exception of MEM You can en ter the menu by pressing the MENU key This will give you an access to the following functions Adjustment of the display contrast 0 100 Data transmission via RS232 Selecting the parameters to be displayed Setting the parameters of a loop impedance measurement Language selection Checking the network stability and upgrading the software advanced functions Obtaining basic information about the manufacturer and about the software version Note By pressing the key 13 UE the Display contrast option is selected as a default 7 10 1 Display Contrast Adjustment e Press the key 13 EV e Using keys D and D set the required contrast e In order to quit this option press the key 14 IP 7 10 2 Data Transmission In order to transfer data between the meter and a PC you need to e Connect the meter to a PC see Paragraph 7 11 2 e From the MENU select the Data transmission RS 232 option H Start an appropriate program on the PC 7 10 3 Display settings In this submenu Fig 26 the displaying of the following parameters can be selected e displaying the results all of them or Zs lk only e displaying the main result in terms of Zs or Ix To select parameters use the keys and To select values use the keys and M In order to confirm changes to the s
12. 4 U and 5 U e Set the rotary switch 9 to the position 4p Imax 280A e Press the key 10 rrr 7 8 Measurement of Earthing Resistances MZC 310S can be used for rough measurements of earthing impedance and resistance To do this use the installation phase cable as an auxiliary voltage source see Fig 22 The measurement result is the sum of resistances of the earth electrode working grounding source and phase cable thus it is burdened with a positive error However if it does not exceed the value allowable for the grounding being tested the user may accept that the grounding has been made correctly and that there is no need to use more accurate measurement methods 26 Fig 22 Method of connecting MZC 310S when measuring the grounding resistance for TN C TN S i TT a using two pole method b using four pole method During earth resistance measurement it is necessary to familiarize with existing scheme of earth systems To receive correct results earth system should be disconnected from the network N and PE cables To measure earthing system in TN C S system and simultaneously to use the phase as the current source it is necessary to disconnect PE and N cable from measured earthing system If such a incorrect results test current will flow not only through the grounding system 27 Fig 23 MZC 310S
13. Two long beeps Situation Displayed symbols Remark and warning signals ona While measuring the loop imped Text Short circuit loop faulty ance the fuse was burnt or another Two long beeps emergency situation in the current circuit occurred Thermal protection prevents the Displayed symbol 16 Tt A sound signal is produced when measurement Long beep the key 10 is pressed Exceeded measurement range Inscription OFL Two long beeps Discharged batteries Displayed symbol 18 Making the measurements is still possible however the user should take into account some additional errors Note Displayed warnings stay on the screen for 3 seconds 7 5 Device Connection Diagrams CAUTION The meter is connected to the tested installation as shown in Figures 9 19 Attention should be paid to the correct selection of test terminals since the precision of the meas urements being performed depends upon the quality of connections made They have to provide a good contact and allow for undisturbed flow of high current measured For in stance it is unacceptable to clip the crocodile connectors onto oxidized or corroded points they have to be either cleaned beforehand or the test needle tip probe should be used for measurements The device is to be connected to a tested installation or appliance in the way shown in fig 9 19
14. anual does not exclude the need to comply with occupational health and safety regulations and with other relevant fire regulations required during the performance of a par ticular type of work Before starting the work with the device in special environments e g potentially fire risk explosive environment it is necessary to consult it with the person re sponsible for health and safety 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 2 Introduction This manual describes the MZC 310S short circuit loop meter We recommend that you familiarize yourself thoroughly with the contents of this manual in order to avoid errors that can result in a safety hazard or in an incorrect assessment of tested installations More information related to safety issues can be found in chapter 3 Safety Before you use the device for the first time read carefully chapter 6 Before You Start If the device causes any problems refer to chapter 8 Trouble Shooting All information on how to use the device is located in chapter 7 Operations 3 Safety MZC 310S device is intended for testing electric shock protection and grounding in AC power net works Results obtained from readings determine the safety status of installations Therefore to e
15. appropriate software If the software package has not been ordered together with the meter it can be purchased from the manufacturer or from an authorized distributor The software package can be used to communicate with a range of instruments manufactured by SONEL S A that are equipped with an RS232 connection Detailed information about the software is available from the manufacturer and the distributors 7 11 2 Connecting The Meter To A Computer H Connect the communications cable to a serial port RS 232 of the computer and to the socket 7 of the meter e From the MENU start the data transmission mode see Section 7 10 2 e Startthe software e Follow the instructions displayed by the program 34 8 Trouble Shooting 8 1 Warnings And Information Displayed By The Meter MZC 310S device displays warnings that can be related to either its functioning or to external con ditions affecting the measurement processes 8 1 1 Exceeding The Measurement Range Text displayed Audible signal Reason Action Voltage measured ex Immediately discon U gt 440V Continuous ceeds 440V nect the meter from the network Short circuit loop re OFL Two long beeps sistance exceeds 20 4p Short circuit loop re OFL Two long beeps sistance exceeds 2002 2p 8 1 2 Battery Status Display Text displayed Reason Action Batteries are discharged Insert new batteries 8 2 Self Test Err
16. ate of the art high quality measuring instrument that is easy and safe to operate However familiarising with this manual will let you avoid measurement errors and will prevent possible problems that might occur while operating the device In this instruction we use three types of warnings They are shown as a framed text and describe possible hazards for either the user of the device Texts that start with the word WARNING describe a life threatening or hazardous situation that can result if the instructions are not followed Wherever a CAUTION exclamation opens the framed text it describes a situation where non adherence to the manual can result in damage to the meter Possible problems that may occur are preceded with the word Note WARNING Before starting to use the device please read carefully this manual always follow all health and safety rules and comply with manufacturer s recommendations WARNING MZC 310S meter is designed to measure short circuit loop impedance and alternating volt ages Using the device for purposes other then described in this manual can cause an injury to the operator and or can damage the device WARNING MZC 310S may be used only by qualified personnel who is certified to work with electrical installations Operating the instrument by a person who is not qualified can result in a haz ardous situation and or can cause damage to the meter WARNING Using this m
17. attery status to make the measurement K or the temperature excess symbol a LOOF 4p 1 2m Batt oe Main result or messages 17 488 UL 2ZZ2ZGU oem Current value of U and f or messages Fig 4 Screen layout in short circuit loop impedance measurement mode main result only Function Network r ted voltage Bank and gt 1 cell numbers Sym ated H Rew el Measurement ri 74 dree thod metho R AF LOOP 4p Ls T ZELI Main result Complementary results Fig 5 Screen layout in the memory browse mode FFA FF LOOF dp ULH ZELW F SH EHz Fig 6 Screen appearance after switching the meter on loop impedance measurement all results 4 6 Buzzer Warning signals Continuous beep e The voltage applied to meter s terminals exceeds 440 11 CAUTION Applying voltage that is higher than the permissible value can damage the device Long beep 0 5 sec e Key that is inactive for the selected function has been pressed 10 START e Device overheating after the key has been pressed Two long beeps after starting a measurement by pressing the 1 key e Network frequency outside of the permissible range 45 65 Hz e Supply power voltage too low UJ lt Umin Test leads connected incorrectly Voltage fading or measurement error Short circuit loop faulty Measurement range exceeded Confirmation and miscellaneous sounds Short sound e Confirmation of a
18. author ised service agent When the symbol 18 is displayed it signals that the batteries are discharged Re placement of the batteries is then necessary To do it you need to e Disconnect all leads from the terminals H Remove the battery compartment lid Replace all batteries The batteries 5xR14 should be inserted as shown on the diagram inside the compartment Incorrectly installed batteries will not damage the device or the batteries but will prevent the meter from functioning Replace the lid and secure it with screws 15 Fig 8 Opening the battery compartment 7 4 Conditions for Performing Tests and Obtaining Correct Results To start a test sequence a number of conditions have to be fulfilled The device will automatically prevent a test from commencing except for voltage measurement if any of the conditions listed below is not satisfied Situation Displayed symbols and warning signals Remarks The voltage applied to meter s ter minals exceeds 440V Text U gt 440V and a continuous beep produced Immediately disconnect the meter from the tested installation The voltage frequency in the instal lation is outside of the range 45 65Hz Texts Error and f lt 45Hz or f gt 65Hz Two long beeps The text appears and a sound sig nal is produced when the key 10 is pressed The voltage applied to meter s ter minals is too low to measure the impe
19. ce measurement will refer to performing the meas urement and displaying the result in terms of current or impedance 7 7 5 Measurement of Touch Voltage Usr And Touch Shock Voltage Ur Note Touch shock voltage Ur as measured by the meter applies to the network rated voltage for which the measurement was made For other rated voltages the result displayed should be converted In order to measure touch voltage Usr or touch shock voltage Ur you need to e Press the key 13 EV e Select Loop parameters settings e In the item Measurement 4p select Ust or Ur and save the selection see Paragraph 7 10 4 MENU 24 e Connect test leads as in Fig 18 for Usr or as in Fig 19 for Ur Note If touch voltage is not measured the user should in MENU item Measurement 4p se lect and save the option Otherwise the displayed values will not be correct since they can induce interfering voltages in unconnected socket Usrr UB The value of touch voltage Usr or touch shock voltage Ur being the value referred to the antici pated short circuit current calculated from the formula as presented in section 7 7 4 is displayed in stead of frequency in the auxiliary results field Fig 21 The measurement of touch shock voltage Ur is performed after introducing an additional resistor inside the device of 1kQ between the terminals U and Ust Up The resistor simulates resistance o
20. connection diagram to be used when measuring the earth resistance for TN C S a using two pole method b using four pole method WARNING Disconnection of neutral and protective cables N and PE is dangerous for persons execute measurement and outside persons It is obligatory to connect protective and neutral cables to the network immediately after measurements If disconnection is not possible need to be used meter from MRU family 7 9 Saving the Measurement Results MZC 310S devices have a built in memory for storing up to 990 results of short circuit loop pa rameters A location in the memory where a single result is stored is called a memory cell The whole memory is divided into 10 banks each consisting of 99 cells Every result can be stored in a cell with a specific address and in a selected bank In this way the user can allocate the cell numbers to individu al measuring points and the bank number to particular objects make measurements in any sequence and repeat them without losing the other data The results storage is not erased when the meter is switched off The data can be therefore re trieved at a later time or transferred to a computer The address of the current cell or bank number does not change either It is recommended to erase the memory after the data has been read or before making a new se ries of measurements that can be stored to the same cells as the previous ones 28 7 9 1 Storing Measurement Resu
21. dance Texts Error and Uz lt 180V or Us lt 190V Two long beeps The text appears and a sound sig nal is produced when the key 20 swat is pressed Improperly connected cable 11 in 4p method to socket 11 42A or in 2p method to socket l1 280A Texts Cables connected improp erly and Terminal 11 42A or Terminal 11 280A Two long beeps The text appears and a sound sig nal is produced when the key 20 smart is pressed Cables I1 or I2 are not connected in the 4p method Text No voltage on terminals I1 12 Two long beeps The text appears and a sound sig nal is produced when the key 10 START In the 4 p method cables U or swapped or connected to different phases Text Different voltage phases on terminals U and I Two long beeps The text appears and a sound sig nal is produced when the key 10 San is pressed Improperly connected cable Us with the set option of touch voltage measurement Texts Incorrectly connected ca ble and Terminal Us Two long beeps The text appears and a sound si nal is produced when the key 10 Je Q staat is pressed While measuring the loop imped ance a voltage drop below Umin took place Text Voltage failure while meas uring Two long beeps While measuring the loop imped ance a situation preventing com pletion of the measurement oc curred 16 Text Error while measuring
22. e measurement 25 An example of a display after a short circuit loop measurement was performed is shown in fig 21 cele LOOP 4p Ik 1516R E ei dp 9m8 KL SA r imi 174 8mQ E ULH S GW f SH fHz 56 1Hz Fig 21 Displaying the results of short circuit loop parameters measurement If displaying of the main result only has been selected the layout of the screen is as shown in Fig 4 7 7 8 Measurement of Short Circuit Loop Parameters Using Two Pole Method This is a measurement involving a current with a value of up to 42A 10Q short circuit resistor 200Q measurement scope To make the measurement you need to e Connect the test cables to the sockets 2 h Imax 42A i 3 l2 Figs 10 12 e Set the rotary switch 9 to the position 2p Imax 42A e Press the key 10 Ener 7 7 9 Measurement of Short Circuit Parameters By the Four Pole Method WARNING Use caution when operating the device as hot air that can be expelled by the built in fan This is a measurement involving the current with a value of up to 280A 1 5Q short circuit resistor 2Q measurement range It is specifically designed for circuits with very low short circuit loop imped ance To make the measurement you need to e Connect the test cables in the following way Figs 13 15 Current cables to sockets 1 l Imax 280A and 3 l2 Voltage cables to sockets
23. e definition of the basic error means the displayed value Voltage Measurement True RMS Basic error 2 iv 2 digits e Frequency range DC 45 65Hz e Input impedance of the voltmeter gt 200kQ Frequency Measurement for voltages within the range 50 440V Range Resolution Basic error 45 0 65 0Hz 0 1Hz 0 1 i v 1 digit Short Circuit Loop Parameters Measurement Using High Current 4p Imax 280A Measurement of short circuit loop impedance Zs Measurement range in accordance with IECGIBR aaa asaaaeea 7 2 1999MQ Display Range Zs Basic error 0 0 199 9 ma 200 1999 mo esa Short Circuit Resistance Rs and reactance Xs Display Range 0 0 199 9 MQ 2 2 mQ of the impedance reading 200 1999 mQ for a particular measurement Short Circuit Current Readings Ik Measurement range in accordance with IEC 61557 for U 230V 115 0A 32 0kA for Un 400V 200A 55 7kA Display Range Ik 200A 1999A A AT Calculated from the short circuit er a 230 kA for ULN 400 kA for Uu e Prospective fault current calculated and displayed by the meter may slightly differ from the value 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
24. ecified in this manual WARNING You must not leave disconnected leads while some of them remains connected to the test ed installation You must not leave the device unattended while it is connected to the tested installation You must not touch appliances connected to the tested installation WARNING You must not use the device if you notice that a loose object is present inside the device is rattling when shaken Do not insert any objects into the device through the fan mesh nor use the device if an ob ject was placed inside Note If the display is totally illegible press down the keys 13 FV and 12 and adjust the contrast using the keys and O 14 7 2 Power Supply Voltage Monitoring The battery charge is shown by the indicator located in the upper right corner of the display as shown in Fig 7 Charged batteries Discharged batteries Replace batteries From maj Mg R luz Function name Measurement results Fig 7 Battery charge indicator 7 3 Battery Replacement MZC 310S meter is supplied with five R14 batteries alkaline batteries are recommended that should be placed in the battery compartment located in the bottom part of the meter s housing WARNING Leaving the leads attached to the terminals can result in a life threatening electrocution CAUTION If the batteries leaked inside the compartment the device should be sent to an
25. erform the measurement 7 7 1 Measurement of Network Voltage and Frequency In the short circuit loop parameters measurement 2p or 4p mode the instrument constantly mon itors the network voltage and frequency in the way described in section 7 6 Their values are displayed at the bottom of the screen Index attached to the voltage U symbol informs the user whether the phase voltage Uu or the inter phase voltage Ui is measured or whether the voltage value ex ceeds the ranges shown in Fig 19 Uz The same rules to determine the voltage type apply to the voltage measured while measuring the short circuit loop impedance 7 7 2 Changing The Network Rated Voltage The rated voltage is used to compute the short circuit voltage value In order to set the voltage rated value do the following e Press down the key 13 eu e Select Loop measurement settings e Inthe item U V select and store the rated voltage value see section 7 10 3 MENU 7 7 3 Displaying All Measurement Results Or The Main Result Only In order to choose between displaying all measurement results or the main result only Zs or Ik you need to e Press the key 13 vex e Select Display settings e Inthe item Results select and store the option required see section 7 10 3 MENU 23 7 7 4 Displaying The Measurement Results In Terms of Impedance or Short Circuit Current The main result of the measurement can be displayed as a
26. erforms the analysis and on its basis it computes the errors values that might additionally burden short circuit loop impedance measurements Note The function applies to the most recent measurement result only After entering this option a short message describing its functionality and a recommendation to get familiarized with this instruction is displayed After electing YES and pressing the key 12 Ki a pic ture shown in Fig 28 for the 4p method is displayed 32 MEHU Expected declension UL w 238l T ZH EHz AA wit Fig 28 Expected declension At the top of the screen the values of the currently tested network voltage and frequency are dis played Underneath the calculated estimate of the error for the measurement method to which the me ter is presently set is presented In order to start the measurement select Measurement and press the key 12 Ki The message Wait the measurement is going on and a progress bar will be displayed When the measurement is completed the result will be shown Fig 28 instead of horizontal lines By pressing the key 12 2 again another measurement will be initiated To quit this option select Exit and then press the key 12 Ki You can also use the key 14 Es 7 10 6 2 Upgrading The Software It is possible to upgrade the built in software without a need to send the meter to a service agent
27. essnenrinnrosesnnrrrrrrssrsrnrnrne 22 7 SHORT CIRCUIT LOOP MEASUREMENT asusa eee eae een oaza azaaaeenace 22 7 7 1 Measurement of Network Voltage and Frequency esseceeeseeeeenteeeteenenees 23 7 7 2 Changing The Network Rated Voltage sea aaa naaieaaiaseica 23 7 7 3 Displaying All Measurement Results Or The Main Result Only 23 7 7 4 Displaying The Measurement Results In Terms of Impedance or Short CirGUIECUITE cits oie nee eiert Deeg Se aves W zy 24 7 7 5 Measurement of Touch Voltage Ust And Touch Shock Voltage UT 24 7 7 6 Selection of Test Cables Length For Measurements Using Two Pole Method ieee sinten stent Nioo YN O A W SEHR AE E dawien 25 7 7 7 Results Display EE 25 7 7 8 Measurement of Short Circuit Loop Parameters Using Two Pole Method 26 7 7 9 Measurement of Short Circuit Parameters By the Four Pole Method 26 7 8 MEASUREMENT OF EARTHING RESISTANCES sccccccecceseseseeceeeeeseenseesees 26 7 9 SAVING THE MEASUREMENT RESULTS aaa aaa aaa aaaaaaaaaazaaaiaca 28 7 9 1 Storing Measurement Results In The Memor 29 7 9 2 Memory BrowSing irera ere dwa ata OE AAA auta 29 7 9 3 Erasing tine memory meritan soaren e a a 30 TAO I reer eee rercececer err erterr OE ad O ada wa dag eecereerercrerere receeter errs 31 7 10 1 Display Contrast Adustent eee aa aaa aenaaiea 31 4 1 0 2 Data TANSMISSION EE 31 7 10 53 DISplay S6tUNTS aa dE A O Eege Ed Reeg 31 7 10 4 Loop Measurement
28. essories is equivalent to the symbol CAT IV 600V 5 Storage When storing the device you should e Disconnect all leads from the meter H Ensure that the device and all accessories are dry H Ensure that the batteries are removed if the device is not going to be used for a prolonged period of time e Storage should conform to the PN 85 T 06500 08 standard Storage temperatures listed in the technical specification are acceptable 6 Before You Start After the purchase e Check the contents of the packaging e Insert batteries e Verify and if necessary modify instrument s configuration method of displaying results network rated voltage measurement of touch voltage length of cables in the 2 p method 13 7 Operations You need to get familiar with this chapter as it describes test diagrams testing methods and basic rules of interpreting obtained results 7 1 Preparing the Device For Work Before commencing the measurements Make sure that the battery condition will allow you to complete the task Check if the meter s housing and leads insulation are not damaged WARNING Using test leads with damaged insulation can cause electrocution WARNING Do not use a device that was stored for a prolonged period of time in unsuitable e g hu mid conditions WARNING You must not use the device with open or partially closed battery compartment and you must not use any power source other than sp
29. ettings select Save and the select YES and press the key 12 ell HEHU View settings Main result Save YES fi Fig 26 MENU Display settings 31 7 10 4 Loop Measurement Settings In this submenu Fig 27 the following parameters can be set e network rated voltage Un 220V or 230V length of cables in the measurement of short circuit loop parameters using a two pole method 2p e measurement of touch voltage Usr or touch shock voltage Ur and their displaying instead of fre quency in the column of auxiliary results The selection is made as described in section 7 10 3 Test cable plm EFH 5 16 ZA Measurement 4p EH u Save YES fi Fig 27 MENU Loop measurement settings 7 10 5 Language Selection Submenu Language enables the user to select a language that the device will use to display all text 7 10 6 Advanced Functions 7 10 6 1 Expected Declension of Results If the result of the short circuit loop impedance measurement diverges from an anticipated value or there is no consistency of results within a series of measurements made you may use the function Expected Dieclension This function can be used to assess errors of loop impedance measurements resulting from the voltage instability at a given measurement point thus independent of the device pa rameters The device set and connected to the network as for the measurements of short circuit loop impedance 2p or Ap p
30. f the human body while the terminal Uer UB is to be connected to the probe that simulates human feet located on the ground Fig 19 whose properties and load are described by relevant standards 7 7 6 Selection of Test Cables Length For Measurements Using Two Pole Method Before starting a measurement a correct length of test leads should be selected CAUTION Using the proprietary test leads and the correct length selection guaranties that the de clared accuracy of measurements will be maintained Note It is assumed that only one test lead has the length selected in the MENU The other one is always 1 2m in length Non compliance with this assumption will cause additional measurement errors test leads resistance is always taken into account by the device In order to select the length of cables you need to e Press the key 13 MENU e Select Loop measurement parameters H In the item Cable 2p m select and save an appropriate value see section 7 10 4 MENU 7 7 7 Results Display If display of all results was selected the short circuit impedance Zs or expected short circuit cur rent Ix is shown as the main result On the right hand side of the screen the measurement components are displayed e Short circuit current lk or Zs e Resistance R e Reactance X As well as e Mains voltage at the time of the measurement Urn Uu Upe or U e Frequency at the time of the touch shock voltag
31. firmware Touch Voltage Measurement Us shock voltage Ur Basic error 0 100V 10 w w 2 digits e For Ur resistor simulating electrical resistance of the human body 1kQ 37 Measurement of Short Circuit Loop Using Standard Current 2p Imax 42A Measurement of short circuit loop impedance Zs Measurement range in accordance with IEC 61557 Test Lead Measurement Range Zs 0 13 199 9 0 0 15 199 9 Q 0 19 199 9 0 0 26 199 9 9 Display range Zs Short Circuit Resistance Rs and reactance Xs Display Range 0 00 19 99 Q 0 012 2 3 digits impedance reading for a pe dad i particular measurement 3 3 digits impedance reading for a aU Renee particular measurement Short Circuit Current Readings Ik Measurement Ranges wg IEC 61557 Measurement Range Measurement Range e Prospective fault current calculated and displayed by the meter may slightly differ from the value 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 Display ranges Calculated from the 200A 1999A short circuit error 2 00kA 19 99kA 0 01 kA 20 0kA 40 0kA Working Conditions e Rated voltage of tested circuits Un Pnase VGlIaJO wa a z nrinn A A Ad Ro EEE ow r w ba
32. inal Ust7 UB Terminal to connect the protective cable PE PEN in the function of touch voltage Ust measurement or an electrode probe in the touch shock voltage Ur measurement mode Test terminal RS 232C Terminal to connect a serial communications cable RS 232C 4 4 2 Keyboard Key O 8 Switching the device power supply on and off 9 Rotary mode switch Selection of measurement function e U_ measurement of alternating voltage e 2p Imax 42A measurement of short circuit loop impedance by the two pole method using a cur rent not exceeding 42A short circuit resistor Raw 109 e 4p Imax 280A measurement of short circuit loop impedance by the four pole method using a cur rent not exceeding 280A short circuit resistor Raw 1 5Q and touch voltage measurement e MEM memory browsing 10 Key START Starting the measurement of short circuit loop impedance or short circuit current 11 Keys ZE Set of cursor keys with auto repetition function activated by holding the key depressed e Selection of an option vertically change of the bank number Selection of an option horizontally change of the cell number 12 Key RA Confirmation of selected option On completing of the measurement Start of the memory write mode In the memory write mode storing the measurement result in the selected cell 13 Key MENU Selection of additiona
33. key being pressed and of a function being performed by the device e Transition from the greeting screen to a screen appropriate for the mode selected e Return to the home screen after displaying an error message e In MEM mode return to the main menu after erasing a cell a memory bank or the entire memory H Ready to perform a measurement displaying READY Long sound 0 5 sec e Signals turning the device ON e Signals that the meter has automatically switched off Three short sounds e Measurement result stored in the memory e Confirmation of new MENU settings e Cell bank or the entire memory erasure confirmation 4 7 Test Leads MZC 310S short circuit loop meters using a 2p method are factory calibrated to compensate for the resistance of the proprietary test leads that are supplied in the following lengths cable L e 1 2m cable PE N e 1 2m 5m H 10m 20m Cables used for measurements using the four pole method do not require calibration However they have to ensure an undisturbed flow of high currents 12 WARNING Connecting unsuitable or faulty cables can cause an electrical shock Note The manufacturer guarantees correct readings only if the original leads supplied with the device are used and if the correct length for 2p method has been selected in the MENU Extension leads or third party cables can be a source of additional errors Note Symbol CAT Ill 1000V shown on acc
34. l functions Display contrast adjustment Starting the data transmission mode Setting the measurement and display parameters Language selection Advanced functions Manufacturer and software info 14 Key esc e Exit from selected option e Return to the previous screen 15 Key EN Switching the LCD illumination on and off 4 5 Graphical Display Panel LCD 16 Ef Device overheating symbol replaces READY flag 17 WI Battery status 18 Battery low needs replacement 19 Sending results to the memory Measurement function Battery status EC CRT ES Value of voltage Frequency of voltage being measured being measured Fig 2 Screen layout in alternating voltage measurement mode Bank and cell number in store in memory mode or the text READY advising about the capability to make the measurement or the temperature excess symbol Length of measurement cables for 2p Measurement function cf Battery status LOOP a ae eee ees I 13160 A E 178 9mi HL 36 71mi 174 BmQ 2853 ULn EU f SH fHz tt SH 1Hz Main result or messages Current value of U and I Complementary results or messages Fig 3 Screen layout in short circuit loop impedance measurement mode all results 10 Length of measurement cables for 2p Text READY advising about the capability Measurement function B
35. lts In The Memory Only the results of measurements made with the rotary switch set to the position 2p or 4p may be stored in the memory To do this follow the steps below Press the key 12 EJ The currently used bank number and the address of the currently used cell will be displayed on the screen Fig 24 The border around the bank number means that at least one cell in the bank is occupied The border around the cell number means that the cell is occupied BL GA d Lmd UL H PU f SH iHz 1316A sl d mi Fig 24 The layout of the screen in the store in memory mode a empty cell b cell with the rec orded result the main result is displayed in grey e Using the keys D and select the bank number and using the keys and select the cell number or keep the current numbers recommended if the bank has been erased before the measurements Press the key 12 fe again The main result and its components as well as the values of network voltage frequency at the time of making the measurement and the network rated voltage will be stored in the memory An attempt to make an entry to the occupied cell will result in a warning signal instead of the main result displayed on the screen Cell occupied Overwrite Pressing the key 12 Fi will cause the new result to be saved and the previous one will be lost In order to cancel the entry and to select an
36. n sure correct operations of the device and reliability of measurements you need to adhere to the fol lowing rules e Before starting to use the meter you have to become thoroughly familiar with this manual e The device should be operated only by persons holding appropriate qualifications and who at tended appropriate occupational health and safety training H It is not acceptable to o Use the meter that is damaged in any way o Use leads with damaged insulation o Use a meter stored in inappropriate conditions e g high humidity for a prolonged pe riod of time e Before commencing a measurement select the desired mode and make sure that the test leads are connected to the appropriate terminals Repairs can be performed by an authorised service agent only Additional points to remember e The text BAT appearing in the right upper corner of the display instead of the battery symbol in dicates insufficient power supply voltage and signals a need to replace the batteries e Measurements made with the meter with the supply voltage being too low are burdened with some additional errors that are impossible for the user to evaluate and therefore must not be relayed up on when assessing if the installation tested is sufficiently protected 4 Device Description and Its Functionality 4 1 M2ZC 310S Characteristics MZC 310S is designed to measure short circuit loop impedance and alternating voltages Main features of MZC 310S
37. n SE 220V lub 230V Phase t phase Voltage i nse inaran A O W TA aaa Daea EA AT AE ENEE ney 380V lub 400V e Voltage range for loop testing 180 440V e Rated frequency of tested cru 50Hz i 60Hz 45 65Hz Maximum test current 2p w Tor 230V EE 24A 10ms ez e FOr AE EE 42A 10ms 38 Maximum test current 4p e Tor 230V 5 oo aaa aaa aaa aaa aaa aaa aaa 160A 30ms OB OE CRC ORAZ 280A 30ms Other technical data a Insulation class double insulation complying with PN EN 61010 1and IEC 61557 b Metrological Category EE s IV 300V lt 2000m above sea level IV 255V lt 3000m above sea level EN 61010 1 compliant c Housing protection class as per PN EN 60529 eee eee eee IP20 d Meter power supply R14 alkaline batteries 5 pcs el DIMENSIONS saneras ad Ab pat Ew aa Ginna dian dentin 295 x 222 x 95 mm Dr Weight zwana deters aici ce dA KE A A tus neta A acticin AO ad ca 2 2 kg g Storage temperature 20 60 C hi Operating 16m TEE 0 440 C I dinn e EE 20 80 j Rated temperature sys zza dE aana eege dace 20 425 C k reference humidity ou saa i edel o kd da abb nae On See ci dE dysk 40 60 Temperature coefficient 0 1 of measured value C m Time before automatic ebutdown eee eee esse eee aaa aaa aan naaania enea 120 sec n Number of short circuit loop measurements min 4000 2 measurements min e DISDIAY
38. n with a high level of interference or unstable voltage Perform more measurements Average the results Use the MENU option Expected declension see section 7 9 5 1 Measurement errors when the de vice is moved from a cold to a warm and humid environment Need for acclimatizing Do not use the device until it reaches the ambient temperature approx 30 min and dries out The meter shows values close to ze ro or zero irrespective of the meas Fault in the short circuit loop Send the device to a service agent urement place and the values devi ate considerably from the anticipated values 9 Cleaning and Maintenance The housing of the meter should be cleaned with a soft damp cloth using a general purpose de tergent Do not use any solvents or any abrasive cleaning agents The electronic system of the meter does not require any maintenance 10 Decommissioning And Recycling Decommissioned electrical and electronic equipment should be collected separately from any oth er types of waste Decommissioned electronic equipment should be sent to a recycling depot in conformance with waste management guidelines Do not remove any components from electronic equipment before sending it to a waste depot Local legislation and guidelines regulating disposal of packaging and batteries should be followed 36 11 Appendices 11 1 Technical Specifications The abbreviation i v in th
39. or Messages If as a result of the self test the instrument detects an error it stops the normal operation and displays an error message The following messages can appear Internal error Damaged FLASH kernel Damaged calibration data The message that appears may be caused by a momentary interference or an external factor You should therefore switch the device off and then on to determine if this is the case If the problem per sists the device should be sent to a service agent 8 3 Before You Send the Device for Repairs Before you send the device to a service agent you should contact the technical support to ensure that the problem is a result of a fault and is not caused by some other factors The repairs should be carried out only by service agents authorised by the manufacturer In the table below you will find the procedures that should be followed in a case of a malfunction 35 Symptom Reason Action The meter does not switch on with the push button 8 ol While measuring the symbol 18 is displayed Batteries discharged or inserted incorrectly Make sure that the batteries are correctly inserted Replace the batteries If the problem persists send the device to the service agent Consecutive results obtained in the same measuring point differ markedly Faulty connection in the installation being tested Find and remove faulty connec tions Installatio
40. ropriate message is displayed f lt 45Hz or f gt 65Hz 7 7 Short Circuit Loop Measurement WARNING You must not leave disconnected leads while some of them remains connected to the tested installation You must not leave the device unattended while it is connected to the tested installation You must not touch appliances connected to the tested installation 22 CAUTION If the tested installation includes RCD circuit breakers you should bridge them for the duration of the test You should keep in mind however that doing so you modify the tested circuit and consequently the results can marginally differ from the expected results Remember to remove any modifications of the installations that were introduced and check the functioning of the RCD circuit breakers Note Performing a large number of consecutive measurements in short intervals can cause the re sistor limiting the current flowing through the device to produce large amounts of heat which in turn can cause the device s housing to become hot This is quite normal The device has a built in overheating protection During measurements with a current of an order of 280A the instrument if necessary acti vates a fan that reduces the instrument cool down time Note The minimum time interval between successive measurements is5 seconds The text START displayed on the screen informs the user that the device is ready to p
41. st prod with a female connector WASONYEOGB1 3 m two wire cable 2 pcs WAPRZ003DZBB Black crocodile clip KO3 4 pcs WAKROBL30K03 Kelvin s crocodile clip 2 pcs WAKROKELK06 High current prod with a female connector WASONSPGB1 Carrying case L1 for the meter and its accessories WAFUTL1 Serial transmission cable RS 232 WAPRZRS232 Meter carrying harness WAPOZSZE1 Service manual Calibration certificate LSWPLMZC310 5 R14 batteries Note In order to measure touch voltage use the 20 m cable included among the accessories 4 3 Optional Accessories ture e Additional accessories that are not a part of the standard kit can be purchased from the manufac r or from suppliers USB RS232 adapter WAADAUSBRS232 Yellow cables with pin plugs for measurements of loop impedance by means of the bipolar method 2 pcs Length 5m WAPRZOO5YEBB Length 10m WAPRZ010YEBB Length 20m WAPRZO20YEBB SONEL Electric measurements software aiding preparation of complete measurement documen tation WAPROSONPE3 Software generating drafts electric installation schematic diagrams SONEL Schematic WAPROSCHEM Measurement calculation software SONEL PE Calculations WAPROKAL 4 4 Terminals and Keys Layout MZC 310S ch m AL 2p ln 42A Ap 0 200A TEJ S UES A Lech Tl S E A _ J RE
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