Sonel WMGBMZC304F User Manual
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Sonel WMGBMZC304F User Manual

Fault loop impedance meter
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Summary of Contents for Sonel WMGBMZC304F

  • Page 3 USER MANUAL FAULT LOOP IMPEDANCE METER MZC-304F SONEL S.A. Wokulskiego 11 58-100 Świdnica Poland Version 1.01 12.05.2023...
  • Page 4 The MZC-304F is a modern, state-of-the art measuring instrument, easy to operate and safe. Read this manual to avoid mistakes during the measurements and prevent operational problems. MZC-304F – USER MANUAL...

  • Page 5: Table Of Contents

    CONTENTS 1 General information ..................5 1.1 Safety symbols ......................5 1.2 Safety ........................6 2 Quick start ......................7 2.1 Switching on and off, display backlight ..............7 2.2 Selecting general measurement parameters ............7 2.3 Remembering the last measurement result ............. 7 3 Measurements ....................
  • Page 6 10.1.2 Frequency measurement ....................37 10.1.3 Z fault loop impedance measurement ............37 L-PE 10.1.4 fault loop impedance measurement RCD (without tripping the RCD) ....... 38 L-PE 10.1.5 Low-voltage continuity and resistance measurement ............. 39 10.2 Other technical specifications ................39 10.3 Additional information ....................

  • Page 7: General Information

    General information Safety symbols The following international symbols are used in the device and/or in this manual: Warning; See explanation in Ground AC current/voltage the manual Declaration of Conform- Dual insulation ity with EU directives DC current/voltage (Protection class) (Conformité Européenne) Confirmed compliance Do not dispose of...

  • Page 8: Safety

    Safety The meter is designed for testing the protection against electric shock in the mains systems. The meter is used to make measurements which results determine the electrical installation safety level. Consequently, in order to ensure safe operation and correct measurement results, observe the follow- ing recommendations: ...

  • Page 9: Quick Start

    Quick start Switching on and off, display backlight To switch on the meter, briefly press the button. To switch off, press the same button longer (the message appears). To switch on/off the display and keypad backlight during the meter operation, briefly press the button.
  • Page 10 Meter settings – algorithm LOOP ► ► ► ► ► ► ◄ ◄ DISP ◄ ◄ ◄ ◄ ▪ - - - ▪ 220 V ▲ ▪ 50 Hz ▪ I ▪ U ▪ 300 s ▪ on ▪ 230 V ▼...
  • Page 11 FACT ► ► ► ► ► SUPP BEEP UPDT conf ◄ ◄ ◄ ◄ SETT ◄ ▪ ACCU ▪ on ▪ BATT ▪ off ▲ ▪ yes ▼ ▪ no ▲ ◄ ◄ ◄ … … … … ▼ ► ►...

  • Page 12: Measurements

    Measurements WARNING  During the measurements (fault loop impedance) never touch the earthed and accessible parts in the tested electrical installation.  During the measurement do not switch the rotary switch as this may cause dam- age of the meter and hazard for the user. Message indicates, that an incompatibile measurement adapter is connected to the meter.

  • Page 13: Checking The Correctness Of Pe (Protective Earth) Connections

    Checking the correctness of PE (protective earth) connections Connect the meters as shown in the figure, touch the contact electrode with your finger and wait about 1 second. When the voltage on the PE conductor is detected, the instrument displays the mes- sage (error in the installation, the PE conductor is connected to the phase conductor) and generates a continuous audio signal.

  • Page 14: Fault Loop Parameters

    Fault loop parameters NOTE!  If the tested mains includes residual current devices, for the duration of measure- ment they should be omitted by bypassing. Remember however that bypassing changes the tested circuit and the results may very slightly differ from the actual values.

  • Page 15: Prospective Short-Circuit Current

    3.4.2 Prospective short-circuit current The meter always measures the impedance, and the displayed short-circuit current is calculat- ed according to the following formula: I  where: – rated voltage of the tested mains, – measured impedance. Based on the rated voltage U selected in the general settings (section 2.2), the meter auto- matically detects the measurement with phase-to-neutral or phase-to-phase voltage and includes this in the calculations.

  • Page 16: Fault Loop Parameters In The L-N And L-L Circuits

    3.4.3 Fault loop parameters in the L-N and L-L circuits  Switch on the meter.  Set the rotary switch to the Z position.  Select the leads length as described in sec. 3.4.1 according to the needs. Connect the test leads as shown in the figure: for measurement in the L-N circuit, measurement in the L-L circuit The meter is ready for measurement.
  • Page 17 Read the main result: the fault loop impedance Z and the mains voltage during the measurement. Press ► to display additional results. Short-circuit current I Fault loop resistance R Fault loop reactance X MZC-304F – USER MANUAL...
  • Page 18  Save the result in the memory (see sections 4.1, 4.2) or press ESC to return to the voltage measurement.  Making a large number of tests over a short time causes the meter to emit a lot of heat. As a result the casing may become warm. This is normal. The meter has an overheat protection.

  • Page 19: Fault Loop Parameters In The L-Pe Circuit

    3.4.4 Fault loop parameters in the L-PE circuit  Switch on the meter.  Set the rotary switch to the Z position. L-PE  Select the leads length as described in sec. 3.4.1 according to the needs. Connect the test leads as shown in one of the figures. Measurement in L-PE circuit Checking effectiveness of protection against electric shock of the meter housing in case of:...
  • Page 20 The meter is ready for measurement. Phase conductor length or the symbol. voltage L-PE Press START to perform the measurement. The remaining measurement issues are analogous to the ones described for the measurements in the L-N or L-L systems. A double-lead measurement is possible when selecting the test lead other than with the socket adapter.

  • Page 21: Fault Loop Impedance In L-Pe Circuit Protected With A Residual Current Device (Rcd)

    3.4.5 Fault loop impedance in L-PE circuit protected with a residual cur- rent device (RCD) The meter allows the fault loop impedance measurements without making changes in the mains with the residual current devices with rated current of minimum 30 mA. ...
  • Page 22  You can discontinue the measurement by pressing the ESC button.  In a mains without interferences, the measurement takes ca. 8 seconds. If interfer- ences occur, this time may be longer.  In the electrical installations with the 30 mA residual current devices the sum of the installation leakage currents and the test current may trip the RCD.

  • Page 23: Low-Voltage Resistance Measurement

    Low-voltage resistance measurement NOTE! Do not connect to the meter voltage above 440 V DC as this can damage the in- strument. Test leads resistance compensation – auto-zeroing 3.5.1  Switch on the meter.  Set the rotary switch to the R or R position.

  • Page 24: Low-Current Resistance Measurement

    When auto-zeroing is completed, the meter auto- matically goes to the “ready for measurement” screen.  message is still displayed after switching to one of the measurement functions (resistance or continuity measurement) in order to indicate that the meas- urement is being made with compensated test leads resistance. ...
  • Page 25 Connect the test leads as shown in the figure. Read the measurement result. Additional information displayed by the meter Tested facility is live. The measurement is blocked. Im- mediately disconnect the meter from the facility (both leads). Message (displayed after the measurement) indicates sig- nificant disturbances in the mains during measurement.

  • Page 26: Measurement Of Resistance Of Protective Conductors And Equipotential Bonding With ±200 Ma Current

    3.5.3 Measurement of resistance of protective conductors and equipoten- tial bonding with ±200 mA current  Switch on the meter.  Set the rotary switch to the R position. CONT The meter is ready for measurement. Connect the test leads as shown in the figure. The measurement starts automatically for resistance values below 100 Ω.
  • Page 27 Press ► to read additional results. – resistance measured with 200 mA CONT- negative polarity current – resistance measured with 200 mA CONT+ positive polarity current Press START to start the next measurement without disconnecting the test leads or to measure the resistance above >100 Ω.

  • Page 28: Memory Of Measurement Results

    Memory of measurement results The meter has the memory for 10 000 individual measurement results. The whole memory is di- vided into 10 banks with 99 cells each. Due to dynamic memory allocation, each cell can contain a different number of individual results, depending on the needs. This ensures optimum memory use. Each result can be saved in a cell of a specified number and in a chosen bank, thus allowing the user to assign the cell numbers to measurement points, and the bank numbers to tested facilities, make the measurement in any sequence and repeat the measurements without losing other data.
  • Page 29 Confirm by pressing ENTER. An attempt to overwrite the results triggers the warning message. ▼ Press ENTER to overwrite the result or ESC to abort. The screen shown left appears for a moment ac- companied by three short audio signals. Then, the meter again displays the last measurement result.

  • Page 30: Changing The Cell And Bank Number

    Changing the cell and bank number After the measurement, press ENTER. The meter is in the memory enter mode. The cell number is flashing. Use the ▲▼ arrows to change the cell number. Use the SET/SEL button to set the active (flash- ing) cell or bank number.
  • Page 31 The sequence of saving the individual measurement results is given in the table below: Measurement function Component results (result group) or Z or U L-N, L-L and U L-PE L-PE or Z L-PE L-PE CONT CONT CONT- CONT+ MZC-304F – USER MANUAL...

  • Page 32: Clearing The Memory

    Clearing the memory 4.4.1 Clearing the bank  Switch on the meter.  Set the rotary switch to the MEM position. Set the number of bank to be cleared as described in sec. 4.2. Set the cell number to (before 1). The message appears, signaling that the meter is ready to delete.

  • Page 33: Clearing The Whole Memory

    4.4.2 Clearing the whole memory  Switch on the meter.  Set the rotary switch to the MEM position. Set the bank number to (before 0). The message appears, signaling that the meter is ready to delete. Press ENTER. The symbols appear, requiring confir- mation.

  • Page 34: Communication With Computer

    In order to ensure the communication of the meter with a computer, additional Bluetooth module and software is required. A program that may be used for this purpose is Sonel Reader. It allows us- ers to read and display the measurement data stored in the meter memory. This program may be downloaded free from the manufacturer's website.

  • Page 35: Troubleshooting

    Troubleshooting Before sending the instrument for repairs, call our service. Perhaps the meter is not damaged, and the problem has been caused by some other reasons. The meter can be repaired only at outlets authorized by the manufacturer. Troubleshooting of typical problems during the use of the meter is described in the table below. Measurement Symptom Cause...

  • Page 36: Power Supply

    Power supply Monitoring the power supply voltage The batteries charging level is indicated by the symbol located in the top right-hand corner of the screen: Batteries charged. Batteries discharged. Replace or charge the batteries! Remember that:  message on the display indicates insufficient power supply voltage and the need to re- place or charge the batteries, ...

  • Page 37: General Rules Of Using The Nickel Metal Hydride (Ni-Mh) Batteries

    General rules of using the Nickel Metal Hydride (Ni-MH) batteries  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.

  • Page 38: Storage

    Storage When storing the instrument, observe the following recommendations:  disconnect all leads from the meter,  thoroughly clean the meter and all accessories,  if you are not going to use the instrument for a longer time, remove the batteries, ...

  • Page 39: Technical Data

    10 Technical data 10.1 Basic information  “m.v.” abbreviation in determination of accuracy means a standard measured value. 10.1.1 Voltage measurement Range Resolution Accuracy (2% m.v. + 6 digits) 0.0…299.9 V 0.1 V (2% m.v. + 2 digits) 300…500 V ...

  • Page 40: Z L-Pe Fault Loop Impedance Measurement Rcd (Without Tripping The Rcd)

    Readings of short-circuit current I Measurement ranges according to IEC 61557 can be calculated from the measurement ranges Z and rated voltages. Display range Resolution Accuracy 0.110…1.999 A 0.001 A 2.00…19.99 A 0.01 A Calculated on the basis of accuracy for the fault loop 20.0…199.9 A 0.1 A 200…9999 A...

  • Page 41: Low-Voltage Continuity And Resistance Measurement

    EMC requirements (resistance for industrial environments) according to the standards ..................EN 61326-1 and EN 61326-2-2 SONEL S.A. hereby declares that the radio device type MZC-304F complies with Directive 2014/53/EU. The full text of the EU Declaration of Conformity is available at the following website address: https://sonel.pl/en/download/declaration-of-conformity/...

  • Page 42: Additional Information

    10.3 Additional information Information about additional uncertainty is useful mainly when the meter is used in untypical con- ditions and for the measurements laboratories during calibration. 10.3.1 Additional uncertainty according to IEC 61557-3 (Z) Influencing value Designation Additional uncertainty Location Supply voltage 0% (BAT is not displayed) 1.2 m, WS-07 lead –...

  • Page 43: Accessories

    11 Accessories The current list of accessories can be found on the manufacturer's website. 11.1 Standard accessories The standard kit delivered by the manufacturer includes: Name MZC-304F  √ MZC-304F meter  √ WS-05 adapter with START button with UNI-SCHUKO plug – WAADAWS05 ...

  • Page 44: Optional Accessories

    11.2 Optional accessories In addition, the following items not included in the standard kit can be purchased from the manu- facturer or the distributors:  WS-04 adapter with UNI- Foldable pin probe, 1 kV, 2 m General measure- SCHUKO angular plug (without (banana socket) ments triggering)
  • Page 45  5-lead version 4-lead version Three-phase socket adapter 32 A AGT-32P AGT-32C WAADAAGT32P WAADAAGT32C  5-lead version Three-phase socket adapter 63 A AGT-63P WAADAAGT63P  AGT-16T 16 A AGT-32T 32 A Industrial socket phase adapter WAADAAGT16T WAADAAGT32T  Calibration certificate with accreditation MZC-304F –...

  • Page 46: Manufacturer

    12 Manufacturer The manufacturer of the equipment and provider of service during and past the warranty period: SONEL S.A. Wokulskiego 11 58-100 Świdnica Poland tel. +48 74 858 38 60 fax +48 74 858 38 09 E-mail: export@sonel.pl Web page: www.sonel.pl...

  • Page 47: Laboratory Services

    National Metrological Institute. According to ILAC-G24 „Guidelines for determination of calibration intervals of measuring instru- ments”, SONEL S.A. recommends periodical metrological inspection of the instruments it manufac- tures no less frequently than once every 12 months.
  • Page 48 NOTES MZC-304F – USER MANUAL...
  • Page 49 NOTES MZC-304F – USER MANUAL...
  • Page 50 NOTES MZC-304F – USER MANUAL...
  • Page 51 MEASUREMENT MESSAGES NOTE! The meter is designed for operation at rated phase voltages of 220 V, 230 V and 240 V and phase-to-phase voltages of 380 V, 400 V, 415 V. Connecting voltage higher than allowed between any of the test terminals may damage the meter and cause a hazard to the user.

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