User Manual
Contents
1. 3 Connect test leads according to one of the drawings OPERATING MANUAL MZC 306 version 1 05 15 Remaining issues connected with the measurements the same as those described for meas urements of the L PE circuit Note Maximum measurement time is about 32 seconds The measurement can be interrupted by press ing the ESC button In the electrical installations where RCD switches are used with short circuit current of 30 mA the sum of leakage currents of the installation and the test current may cut 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 READY The meter is ready for measurement L N Voltage on terminals L and N is not within the measura ble range L PE Voltage on terminals L and PE is not within the measura ble range Conductor N is not connected This message displayed after the measurement indicates major noise in the system during the measurement The measurement result may be affected by a large unspeci fied error All remaining messages as in case of measurement in L N and L L circuit 16 OPERATING MANUAL MZC 306 version 1 05 3 Memory of measurement results MZC 306 meters are equipped with the memory that can store 3500 single measurement results The whole memory is divided into 10 memory banks with 99 cells in each bank Thanks to dynamic memory allocation each2. P dad 19 3 3 DELETING MEMORY DATA a Re es sau pP Gaia 20 3 3 1 Peleng DONI eee tiit eA at P etae ti Ru e ER M MEE 20 3 3 2 Deleting the whole memory eese sees aaa nennen sess 21 3 4 COMMUNICATION WIH PC a aa Pause Eu open v yeu dad 22 3 4 1 Set of accessories to connect the meter to a 22 3 4 2 ME aM 22 3 4 3 sic eiie E E rie E 23 EROUBLESHOOTING cin 24 POWER SUPPLY OF THE METER dad 25 5 1 MONITORING OF THE POWER SUPPLY 25 5 2 REPLACING BATTERIES RECHARGEABLE BATTERIES eene 25 5 3 CHARGING RECHARGEABLE BATTERIES eese eene 26 5 4 GENERAL RULES OF USING THE NICKEL METAL HYDRIDE NI MH BATTERIES 27 CLEANING AND MAINTENANCE 22000200000000000000000000000000000000000000000000000000 28 SIORAGDB ideni penult Gd Rz diae 28 DISMANTLING AND DISPOSAL 22200222000000000000000000000000000000000000000000008 28 TECHNICAL SPECIFICATIONS alk 29 9 1 BASIC DATA NER RN I NU UU 20 OPERATING MANUAL MZC 306 version 1 05 3 9 2 ADDINONAE DAT 32 9 2 1 Additional uncertainties according to 61557 3 Z ccce 32 10 EQUIPMENT ai 32 IO T STANDARD EQUIPM
3. OPERATING MANUAL FAULT LOOP IMPEDANCE METER MZC 306 UOISSIUISUEJ pue Alowauw y pue NAN 4d y ul doo jo 2 217 1 110 N 1 By ur eouepeduul doo jo uaweunseau 77777 v77 Juauuno jenpises e 34 71 U eouepeduul doo oys jueujeunseeui JH Z uonounj ay SNOILONNA 9NILO23 13S HOLIMS yo uo Kejdsip y Buruan sBunjes 5 5 gS 19005 5 uoneoipu sdoo 5 M8IA8J 90E ZW lt lt N Ga 1 sjeuiuuo ay Buunsee 3jexoos pue 5 90 2ZIN A 3 N x 2 umop dn lt uonouny eu uonounj 264 opoJjoe 3 lt uelis S gt ner OPERATING MANUAL FAULT LOOP IMPEDANCE METER MZC 306 SONEL SA ul Wokulskiego 11 58 100 Swidnica Version 1 05 24 09 2014 The MZC 306
4. Press ENTER after finishing the measurement ENTER The meter is in the memory storing mode Ci Nu In You can change cell number by pressing and Wa bank number by pressing 4 and The cell is empty Bank Cell The cell contains the LPE d 25 LL 1 OPERATING MANUAL MZC 306 version 1 05 17 25 The contains the result of a different type than is to be entered The cell is completely 25 z full Es 2 You can view different types of results and their compo nents using buttons lt lt gt gt 3 Select the bank and number or leave the current number Then press ENTER again The screen shown below appears for a moment accompanied by three short beeps and then the meter returns to display the last result of the measurement 4 An attempt to overwrite a result causes the warning symbol to appear 18 OPERATING MANUAL MZC 306 version 1 05 CD A Bank Cell Press ENTER to overwrite the result or ESC ENTER ESC Note Complete set of results main result and supplementary results for a given measuring function and preset measurement settings are stored in the memory 3 2 Viewing memory data Turn on the meter oma Turn the rotary switch to the MEM position CI The content of the last saved cell appears Bank Cell n Changing the number of cells LN 9
5. M LI Note Enter the result into memory see section 3 2 or press ESC to return to the voltage measurement When many measurements are made in short time intervals the meter may emit a large amount of heat As a result of this the housing 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 controlled by the meter Ik short circuit current or Zs fault loop impedance R fault loop resistance XL fault loop reactance Mains volt age at the time of measurement which displays the message 6 informing that the measurement can be made OPERATING MANUAL MZC 306 version 1 05 Additional information displayed by the meter iy o The meter is The meter is ready for measurement for measurement L N Voltage on terminals L and N is not within the measura Error Error during the measurement the measurement Error during the measurement voltage loss after the measurement Short circuit malfunction L and N reversed Signalling works if you use WS xx lead or PE lead additionally 2 5 4 Measurement of fault loop parameters in the L PE circuit Turn on the meter cm Turn the rotary switch to the Z UL pe position 2 Depending on the needs select the measurement parameters ac cording to section 2 5 1 Connect t
6. Web page www sonel pl NOTE Service repairs must be performed solely by the manufacturer OPERATING MANUAL MZC 306 version 1 05 MPI 525 Multifunction Electrical s 6 IV DIC MRU 200 Earth Resistance and Resistivity Meter MIC 2 Insulation Resistance PQM 701 Power quality analyzer CMM 40 Industrial multimeter CMP 200 Digital Clamp on AC MPI 505 Multifunction Electrical Installations Meter Resistance m esistivi M KT 384 Thermal imager Datalogging Light Meter CMP 1006 Digital Clamp on multimeter DIT 500 IR thermometer 502 Multifunction Electrical Installations Meter MIC 30 Insulation Resistance Meter MMR 630 Microohmeters OPERATING MANUAL MZC 306 version 1 05 MIC 2510 Insulation Resistance Meter PAT 805 Portable appliance tester LKZ 700 Wire tracer 35 36 5 OPERATING MANUAL MZC 306 version 1 05 WARNINGS AND GENERAL INFORMATION DISPLAYED THE METER ATTENTION MZC 306 meter is designed to operate at the rated phase voltage 110V 115V 127V 220V 230V 240V 290V 400V and interphase voltage 190V 200V 220V 380V 400V 415V 500V and 690V Connecting voltage higher than allowed between any of the test terminals may damage the meter and cause a hazard to the user voltage is incorrect for making a measurement L PE 4 voltage is incorrect for making a measurement NPE O Volta
7. and remove defects The network with high Perform more measure noise or unstable volt ments average the re age sults Incorrectly selected test leads in the meter set OPERATING MANUAL MZC 306 version 1 05 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 RII Batteries rechargeable batteries charged d 1 Batteries rechargeable batteries discharged c bH Replace batteries or recharge rechargeable batteries Note e Symbol bAt in the display means that the supply voltage is too low and indicates that the batter ies must be replaced or recharged e Measurements performed with an insufficient supply voltage will be at risk of additional errors which the user is unable to evaluate 5 2 Replacing batteries rechargeable batteries MZC 306 meter is powered from SONEL NiMH rechargeable battery pack It is also possible to power the meter by using four LR14 batteries Battery charger is installed inside the meter and cooperates only with the manufacturer s accumu lator pack The charger is powered by external power supply adapter It can be also powered from the car cigarette lighter socket Both the accumulator pack and the adapter are standard components of the meter WARNING Before replacing the batteries or accumulators disconnec
8. e steady light end of charging In case when you insert the batteries and connect the adaptor the following message is displayed and charging is not started 26 OPERATING MANUAL MZC 306 version 1 05 HL L LI Note As a result of interferences in the network it is possible that the process of charging of accumulators will finish too fast When charging time is too short turn off the meter and start charging again 5 4 General rules of using the Nickel Metal Hydride Ni MH batter ies 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 is however recommended to discharge them com pletely every few cycles During
9. the fol lowing Standards cto eo ceat cr an EN 61326 1 2006 and EN 61326 2 2 2006 OPERATING MANUAL MZC 306 version 1 05 31 9 2 Additional data Data on additional uncertainties are useful mainly when the meter is used in non standard condi tions and for metrological laboratories for the purpose of calibration 9 2 1 Additional uncertainties according to IEC 61557 3 Z Significant parameter Additional uncertaint 0 095 BAT is not lit SE Ez 1 2 m lead 00 5 m lead 0 0110 Temperature 0 35 C 10 m lead 0 0190 20 m lead 0 0350 WS 01 lead WS 05 0 0150 2 Er _ E ERG 4 Phase angle 0 30 at the bot tom of test range E2 E3 E6 2 E7 Eg 10Equipment 10 1 Standard equipment Standard set of equioment supplied by the manufacturer includes MZC 306 meter WMPLMZC306 set of test leads WS 05 adapter with UNI Schuko angled plug WAADAWS05 1 2m leads with banana plugs pcs yellow WAPRZ1X2YEBB red WAPRZ1X2REBB and blue WAPRZ1X2BUBB USB interface cable WAPRZUSB crocodile 2 pcs blue WAKROBU20K02 and red WAKRORE20K02 test probe with banana socket 3 pcs yellow WASONYEOGB 1 red WASONREOGB1 and blue WASONBUOGB 1 meter case L 4 WAFUTLA meter harness WAPOZSZE2 operating manual guarantee card calibration certificate NiMH 4 8 V 4 2 Ah accumulator package WAAKUO7 Z7 charger
10. ENT a aid obese dte LE AEO 32 10 7 OPTIONAL ACCESSORIES ER rA r AEC 33 MANUFACTURER ient EH epe een nee 34 4 OPERATING MANUAL MZC 306 version 1 05 1 Safety MZC 306 meter is designed for performing check tests of protection against electric shock in mains systems The meter is used for making measurements and providing results to determine safe ty of electrical installations Therefore in order to provide conditions for correct operation and accura of obtained results the following recommendations must be observed Before you proceed to operate the meter acquaint yourself thoroughly with this manual and ob serve the safety regulations and specifications provided by the producer Any application that differs from those specified in the manual may result in a damage to the de vice and constitute a source of danger for the user MZC 306 meters must be operated only by appropriately qualified personnel with relevant certifi cates authorising the personnel to perform works on electric systems Operating the meter by un authorised personnel may result in damage to the device and constitute a source of danger for 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 e
11. TER Use the same button to recall the last result after powering the meter off and on if the position of function selector has not been changed OPERATING MANUAL MZC 306 version 1 05 7 2 3 Measurement of alternating voltage The meter measures and displays alternating mains voltage before the measurement This voltage is measured for the frequencies within the range of 45 65 Hz The test leads should be con nected as for a given measuring function 2 4 Checking the correctness of PE protective earth connections After connecting the meter according to the drawing touch the contact electrode with a finger and wait for about 1 second When volt age is found on PE the meter displays symbol PE error in the installation PE connected to the phase conductor and generates a continuous beep This option is available for the 2 measurements Note WARNING When a dangerous voltage is detected on PE conductor measurements must be immediately stopped and a fault in the installation must be removed The person making a measurement must ensure that he she is standing on a non insulated floor during the measurement otherwise the result may be incorrect The threshold value which triggers the signal of exceeded allowable voltage on PE conduit is ap proximately 50 V In the 4 and functions when only the phase conductor is connected to one of the measuring terminals of the meter L N PE
12. WAZASZ7 32 OPERATING MANUAL MZC 306 version 1 05 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 WAPRZO05REBB WAPRZOTOREBB e 5m lead red e 10m lead red WAPRZO20REBB WAADAWSO01 ILE e 20m lead red e WS 01 adapter for triggering the meas WAADAAGT16P five wire version urement with the UNI Schuko plug WAADAAGT16C four wire version WAADAAGT32P five wire version 33 s WAADAAGT32C four wire version ets AGT 16P adapter three phase sock WAADAAGT63P five wire version d s T 32P adapter for three phase sock TN 2 p cable for charging the accumulator pack age from the car cigarette lighter socket AGT 63P adapter for three phase sock ets OPERATING MANUAL MZC 306 version 1 05 33 34 WAPROSONPE5 LSWPLMZC306 Odczyt danych z miernika i e calibration certificate e SONEL Pomiary Elektryczne SONEL Electrical Measurements software for generating measurement reports Note The software is supported by the following systems Windows XP Service Pack 2 Windows Vista and Windows 7 11 Manufacturer The manufacturer of the device and provider of warranty and post warranty service SONEL S A ul Wokulskiego 11 58 100 Swidnica Poland tel 48 74 858 38 60 fax 48 74 858 38 09 E mail export sonel pl
13. and the bank and viewing the results is performed as in sec 2 tion 3 1 I IL um hi Additional information displayed by the meter Measurement made in L N loop for 21 Zi L function LPE LP alternating with rcd OPERATING MANUAL MZC 306 version 1 05 19 3 3 Deleting memory data 3 3 1 Deleting bank data Turn on the meter oma the rotary switch to the MEM position 2 m Set the bank number wink can to be deleted Set the cell number L n 1 1 the number dis Bank Cell appears and the 4 symbol indicating the readiness to delete appears AL LLL Press ENTER push button CI and A sym bols appear ask ing you to confirm deletion Bank Cell JE LLL 4 Press ENTER to start deleting or ESC deletion pro ewm tO abort gress is shown on the display in When deletion is complete the me ter generates three 20 OPERATING MANUAL MZC 306 version 1 05 CED Short beeps and sets the cell num ber to 1 Bank Cell 3 3 2 Deleting the whole memory 1 aa i Turn on the meter oma the rotary switch to the MEM position 2 CED d Set the bank number between 0 and 9 Bank Cell the bank number disappears and sym bol d Lis displayed indicating the readi ness to delete Bank Cell JL ILL and 4 sym bols appear ask in
14. 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 short circuit loop impedance ZL pE without triggering of RCD Measurement of short circuit loop impedance 25 Test range according to IEC 61557 Display range Basic uncertainty 0 19 99 0 01 Q 6 m v 10 digits 20 0 199 9 0 200 1999 0 RAS It will not trip RCD s of lan 2 30mA Rated operating voltage Un 110V 115V 127V 220V 230V 240V 390V 400V Operating voltage range 100 440V Rated mains frequency fn 50Hz 60Hz Operating frequency range 45 65Hz Control of correctness of PE terminal connection by means of a touch electrode Indications of short circuit loop resistance Rs and short circuit loop reactance Xs Display range Basic uncertainty 0 19 99 0 0 01 0 19 1015 of Zs 20 0 199 9 Q 6 5 digits of Zs 30 Calculated and displayed for 25 lt 200 OPERATING MANUAL MZC 306 version 1 05 Indications of short circuit current Ik Test range according to IEC 61557 can be calculated on the basis of test ranges Zs and rated voltag es Display range Resolution Basic uncertainty 0 055 1999A 0001A 200 1999A X Calc
15. displayed Before starting the measurement with test leads terminated with banana plugs select the ap propriate length of the phase conductor compatible with the length of the test lead used for measurement L im L Sm s gt t gt Ves Approval Phase conductor length Parameter OPERATING MANUAL MZC 306 version 1 05 Note Cables from known manufacturers and selection of the correct length guaran tees the declared measurement accuracy A The leads with Uni Schuko plugs can be used only in mains below 250V 2 5 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 network being tested is outside the tolerance range the meter will not be able to determine 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 10 OPERATING MANUAL MZC 306 version 1 05 The voltage range for which the impedance measurement is
16. es an inactive parameter 2 Set the parameters according to the following algorithm OPERATING MANUAL MZC 306 version 1 05 4001 vw 290V w 240V vw 230V PES w 220V bf 127V a vw 115V na l w a gt YES 4 N e Main result of System Auto fault loop im voltage OFF pedance measurement Parameter L N Symbol s ln HaFF d P Press ENTER to validate the changes and go to the ENTER measurement function ESC Press ESC to go the measurement function without validat ing the changes 3 Note Before the first measurements select the mains rated voltage Un 110 190V 115 200V 127 220V 220 380V 230 400V 240 415V 290 500V or 400 690V used in the area where measurements are made This voltage value is used for calculating the values of prospective short circuit current After turning the meter on and displaying the software version a current nominal system voltage is displayed phase voltage in the main field and interphase voltage in the auxiliary one 2 2 Remembering the last measurement result The result of the latest measurement is remembered by the meter until a next measurement is started or measurement settings are changed or the measuring function is changed by means of the rotary switch When you go to the voltage measurement screen with the ESC button you can recall this result by pressing EN
17. est leads according to one of the drawings Checking effectiveness of protection against electric shock of the enclosure in case of a TN b TT 14 OPERATING MANUAL MZC 306 version 1 05 4 dll The meter is ready for measurement lt lt phase conductor L m length or the symbol wA NA wa W 1 pe voltage L A AL sj Make measurement by pressing START push o button Remaining issues connected with the measurements are the same as those described for meas urements in L N circuit or L L circuit Note If you do not use the lead with AC power plug a double cable measurement is possible Additional information displayed by the meter READY The meter is ready for measurement L N For the lead with the plug voltage on terminals L and N is not within the measurable range L PE Voltage on terminals L and PE is not within the measura ble range All remaining messages as in case of measurement in L N and L L circuit 2 5 5 Measurement of short circuit loop impedance in L PE circuit protected with a residual current device RCD The MZC 306 enables the fault loop impedance measurements without altering the mains with RCD s with the rated current of at least 30mA 0 ES Turn on the meter cam Turn the rotary switch rv to position Depending on the needs select the measurement parameters ac cording to section 2 5 1
18. g you to confirm Press ENTER push button deletion OPERATING MANUAL MZC 306 version 1 05 21 CED h Bank Cell 4 Press ENTER to start deleting or ESC deletion pro sem to abort gress is shown on the display in 96 CED dg When deletion is complete the me kase did ter generates three i short beeps and i sets the cell num ber to 1 3 4 Communication with PC Remarks Data transmission is not possible during the charging of accumulators 3 4 4 Set of accessories to connect the meter to a PC In order to operate the meter with a PC a cable for serial transmission and appropriate software are required 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 4 2 Data transmission If the switch is in the MEM position after detecting the USB connection with the computer the meter automatically goes to the data transmission mode and displays the fol lowing screen 22 OPERATING MANUAL MZC 306 version 1 05 To transmit data follow the instructions of the software 3 4 3 Software update on the meter by pressing and keeping ENTER and SET buttons The meter displays the following screen SET uob HEIL LI LIL After connecting the meter to a PC using a USB cable follow the instructions
19. ge voltage exceeds allowable value 1 68 Phase connected to terminal N instead of L READY The meter is ready for measurement This message displayed after the measurement indicates major noise in the system during the measurement The measurement result may be affected by a large unspecified error 80 BEL Measurement blocked by the thermal protection Long beep after pressing the START button BILL Status of batteries or accumulators Batteries or accumulators charged Batteries accumulators discharged BAHE Batteries accumulators fully discharged Ru Attempting to charge the battery SONEL S A Wokulskiego 11 St 58 100 Swidnica Poland Ty 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
20. l all Gasse cens odds o nt det tmn me e CR innen he 20 60 C ZW 0 45 temperature range suitable for initiating battery 10 C to 40 C temperatures at which loading is interrupted below 5 C and above or equal to 50 C md 20 80 reference temporale e uite eau AE MEE EE 23 2 C relerence HUMANA does leben d ba racha 40 60 altitude above sea level iius dea ete duode octets a esee 2000 m OAU OEF HOP 300 seconds number of Z measurements for alkaline batterieS gt 5000 2 measurements per minute CISD AY cen ras o Al ron um RE modular LCD memory of measurement results ee ooo enea aaa naa aaa naa eene enne nnne nnn nnn 990 cells data transmissions sesto eet pate PA ENCIMA MU EPA ON CALO CM DUM ca Qe USB quality design and manufacturing are ISO 9001 compliant the device meets the requirements of IEC 61557 standard the product meets EMC requirements immunity for industrial environment according to
21. meter is a modern easy and safe in use measuring device Please acquaint yourself with the present manual in order to avoid measuring errors and prevent possible problems related to operation of the meter 2 OPERATING MANUAL MZC 306 version 1 05 1 2 3 4 5 6 7 8 9 CONTENTS SAEI oni unten npa mies 5 NIEASURENIENT Sza aa BAN eun oe ve s ei 6 2 1 SELECTION OF GENERAL MEASUREMENT PARAMETERS eene 6 22 REMEMBERING THE LAST MEASUREMENT RESULT 7 2 3 MEASUREMENT OF ALTERNATING VOLTAGE eene eene en entente 8 2 4 CHECKING THE CORRECTNESS OF PROTECTIVE EARTH CONNECTIONS 8 259 MEASUREMENT OF FAULT LOOP PARAMETERS 9 2 04 Selection of measurement parameters 9 29 2 PYOSPECIIVE CULT ONG PRU EN 10 2 5 3 Measurement of fault loop parameters in the L N and L L circuits 11 2 5 4 Measurement of fault loop parameters in the L PE circuit 14 2 9 3 Measurement of short circuit loop impedance in L PE circuit protected with a residual current device dok Od eeu peo 15 MEMORY OF MEASUREMENT RESULTS 22220002200000000000000000000000000 17 3 STORING THE MEASUREMENT RESULTS DATA IN THE MEMORY 17 3 2 VIEWING MEMORY DATA Ga Eee
22. ntenance methods presented by the manufacturer in this manual Clean the meter casing and the case with a wet cloth using generally available detergents Do not use any solvents and cleaning media which could scratch the casing powder paste etc 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 28 OPERATING MANUAL MZC 306 version 1 05 9 Technical specifications 9 1 Basic data Abbreviation used in the specification of measurement uncertainty means a standard measured value Voltage measurement Basic uncertainty 0 0 249 9 V 296 m v 4 digits 250 750V 296 m v 2 digits e Frequency
23. nvironments e g potentially fire risk explosive environment it is necessary to consult it with the person responsible for health and safety It is unacceptable to operate adamaged meter which is completely or partially out of order ameter with damaged insulation a meter stored for an excessive period of time in disadvantageous conditions e g excessive humidity If the meter has been transferred from a cool to a warm environment with a high level of relative humidity do not start measurements until the meter is warmed up to the am bient temperature approximately 30 minutes One should remember that when the word bAt appears on the display it indicates insufficient voltage of power supply and the need to charge the accumulator or replace batteries Measure ments performed by means of the meter whose supply voltage is too low are burdened with addi tional errors that are impossible to be estimated by the user Such measurements must not be re lied on in order to state correctness of protection of a network tested Battery spill and damage to the meter may occur if discharged batteries are left in the meter Before measurements may commence make sure the leads are connected to the appropriate measurement sockets Do not operate a meter with an open or incorrectly closed battery accumulator compartment or power it from other sources than those specified in the present manual Repairs may be performed only by an auth
24. of the memory cells can contain different quantity of single measurement re sults depending on the needs Optimal use of the memory can be ensured in this way Each meas urement 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 option assign memory cell num bers to individual measurement points and the memory bank numbers to individual facilities The user may also perform measurements in any chosen sequence and repeat them without losing other data Memory of measurement results 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 memory 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 Set the appropriate cell number to allow entering to a single cell of successive measurement results relat ing to a given measuring point facility Only the results of measurements triggered by START push button may be stored in the memory It is recommended to delete the memory after reading the data or before performing a new series of measurements that may be stored into the same memory cells as the previous ones 3 1 Storing the measurement results data in the memory 1
25. of the software OPERATING MANUAL MZC 306 version 1 05 23 4 Troubleshooting problem has occurred for another reason during operation of the meter 24 The meter start after pressing but ton During the measurement lowing symbol played ht The meter turns off dur ing the initial test Measurement errors af ter moving the meter from cold environment to a warm and humid place Consecutive results ob tained in the same measuring point significantly different from each other voltage the fol is dis The meter indicates the values close to zero or zero irrespective of the location of measure ment and these values are significantly different than expected does Discharged or incorrect Before returning the meter for repair call the service perhaps the meter is not damaged and the The meter repairs should be carried out only in the outlets authorized by the manufacturer The following table describes recommended activities in some situations that may occur Check if the batteries are ly placed batteries re placed correctly replace chargeable batteries No acclimatization tings and or recharge the re chargeable batteries this does not help sent the meter for servicing Do not perform the meas urements until the meter reaches the ambient tem perature about 30 minutes and dries ns Incorrect connections in Check the connectio the tested system
26. orised service point ATTENTION Only standard and additional accessories for a given device should be used as listed in the Equipment section Using other accessories may cause damage to measuring termi nals and introduce additional measurement uncertainty 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 306 version 1 05 2 1 Note Due to continuous development of the meter s software the actual appearance of the display in case of some of the functions may slightly differ from the dis play presented in this operating manual 2 Measurements WARNING During measurements the earthed parts and parts accessible in the electrical 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 Selection of general measurement parameters SET y Keeping SET button pressed turn on the meter and wait for the pa rameter selection screen Use and P buttons to go to the next parame ter T Use A and W buttons to change the parameter value The value or symbol to be changed is flashing Symbol YES indicates an active parameter while W symbol indicat
27. performed 110 190 00 121 171 209 UM OX 115 00 sag 00103 127 180 220 Y U IV 427 90 ax u 1zzy 100 114 140 198 242 UM u 230v 100 M 207 230 253 AW 360 440 The voltage range U Ln for which the short The voltage range U L for which the short circuit current is calculated circuit current is calculated d 290 319 4550 750 U 290V 261 1 450 500 U V 400 Y 400 360 440 621 690 750 U V The voltage range for which the impedance measurement is performed 2 5 3 Measurement of fault loop parameters in the L N and L L circuits Turn on the meter Turn the rotary switch to the Z UL N L L position Depending on the needs select the measurement parameters ac cording to section 2 5 1 OPERATING MANUAL MZC 306 version 1 05 11 12 Connect test leads according to the drawing a for meas urement in the L N circuit or b for meas urement in the L L circuit 4 ANE meter is ready for measurement Ie TT Phase conductor length or the sym bol U WA wa W lt UL N voltage N E JILI 5 i Make measurement by pressing START push button Read the main meas urement result fault loop impedance Zs or short circuit current lk To read additional results press the lt lt Q Q gt OPERATING MANUAL MZC 306 version 1 05 V U 233r
28. range 45 65Hz Measurement of short circuit loop impedance ZL PE 21 214 Measurement of short circuit loop impedance Zs Test range according to IEC 61557 Display range 596 m v 3 digits 496 m v 3 digits 496 m v 3 digits e Rated operating voltage Unt n 110 190V 115 200V 127 220V 220 380V 230 400V 240 415V 290 500V 400 690V perating voltage range 100 440V for Zi pg and oraz 100 750V for Zi 4 Rated mains frequency fn 50Hz 60Hz Operating frequency range 45 65Hz Maximum measuring current 36 7A 10ms for 690V 21 3A 10ms for 400V 24 5A 10ms for 230V 12 2A 10ms for 115V e Checking the correctness of PE terminal connection by means of a contact electrode applica ble to ZL PE Indications of short circuit loop resistance Rs and short circuit loop reactance Xs Display range Basic uncertainty 0 19 99 Q 0 01 Q 5 5 digits value Zs 20 0 199 9 Q 5 5 digits value Zs e Calculated and displayed for Zs lt 200 Q OPERATING MANUAL MZC 306 version 1 05 29 Indications of short circuit current Ik Test range according to IEC 61557 can be calculated on the basis of test ranges Zs and rated voltag es Display range Basic uncertainty 0 055 1 999 0 001 2 00 19 99 0 01 Calculated on the basis of uncertainty for fault loop fault current calculated and ERA by the meter may slightly differ from the ue
29. t the test leads from the meter In order to replace the package of accumulators it is necessary to do the following Remove all the test leads from the sockets and turn the meter off e Remove the four screws of the accumulators batteries compartment in the lower part of the cas ing Remove the compartment Remove the compartment cover and remove the batteries accumulators Insert a new package of accumulators Insert snap the compartment cover Insert the compartment in the meter Screw the four screws of the accumulators batteries compartment OPERATING MANUAL MZC 306 version 1 05 25 Do not use the meter when the accumulator compartment is removed or open or power it from other sources than those mentioned in this manual ATTENTION Have the meter serviced in case of battery leakage inside the compartment 5 3 Charging rechargeable batteries Charging commences after connecting the meter to the power supply regardless of the fact if the meter is switched on or off The rechargeable batteries are charged in accordance with the algorithm of quick charge this process reduces the charging to approx four hours In order to turn the device off unplug the power charger The charging process is indicated by displaying consecutive segments of the battery on LCD In addition the charging status is indicated by LED diode e Slow blinking charging in progress e fast blinking emergency status
30. the PE alarm will be generated when the contact elec trode is touched When in the 4 and _ functions only L and N conductors are connected respectively to the meters L and N terminals the PE alarm may be triggered when the contact electrode is touched but sometimes this does not happen this depends among other things on the floor re sistance mains voltage footwear etc 8 OPERATING MANUAL MZC 306 version 1 05 2 5 Measurement of fault loop parameters If there are residual current devices in the network tested they should by passed 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 After completing measurements always remove modifications introduced to the tested system for the period of measurements and check the operation of the residual current switch The above remark does not apply to measurements of short circuit loop imped ance with 21 function 2 5 1 Selection of measurement parameters Turn the rotary switch to one of the loop impedance measure ment ranges 2 Set the phase conductor length according to the following algorithm and according to the rules described in general parameters setting NOTE The Uni Schuko WS xx lead is detected by the me ter and it is then impossible to select the cable length the Esymbol is
31. 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 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 OPERATING MANUAL MZC 306 version 1 05 27 6 Cleaning and maintenance NOTE Use only the mai
32. ulated on the basis of uncertainty for fault loop 200 1999kA LL 200 400kA OKA 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 Other technical data gt lt cct co gt gt type of insulation es aaa ananasa zana aa zanaaazazacanana double EN 61010 1 and IEC 61557 compliant measurement IV 600V III 10000 acc to EN 61010 1 degree of protection of housing acc to 60529 IP54 power SUDDIV OF Ie ac actes a POETA alkaline batteries 4x1 5 V LR14 C or accumulator package SONEL NiMH 4 8 V 4 2 Ah parameters of AC adapter for the battery charge 100 V 240 V 50 Hz 60 Hz RE T CIR E LU MET 288 x 223 x 75 mm meter weight with batteries or rechargeable about 2 kg Storage Tempe
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