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Sonel WMGBMMR650 User Manual

Low resistance meter
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  • Page 3 LOW RESISTANCE METER MMR-650 USER MANUAL SONEL S.A. Wokulskiego 11 58-100 Świdnica Poland Version 1.12 05.07.2023...
  • Page 4 Thank you for purchasing our low-resistance meter. MMR-650 is a modern, high-quality measuring device, which is easy and safe to use. Please acquaint yourself with this manual in order to avoid measuring errors and prevent possible problems in operation of the meter. MMR-650 –...

  • Page 5: Table Of Contents

    CONTENTS 1 Safety ........................ 5 2 General settings – main menu ................ 6 2.1 Meter settings ......................6 2.1.1 Energy saving ........................6 2.1.2 Sound settings ........................7 2.1.3 PIN code settings ......................7 2.1.4 Display brightness settings ....................8 2.1.5 Wi-Fi configuration ......................
  • Page 6 4.5 Copying customer data from the memory to USB stick and vice versa ....55 4.6 Deleting data ......................56 Deleting the meter’s memory data ................... 56 4.6.1 4.6.2 Deleting a client ......................56 4.6.3 Deleting an object ......................57 5 Report printing ....................

  • Page 7: Safety

    Safety MMR-650 is a meter designed for measuring resistance of various types of connections (welded, soldered, butt) in electrical installations as well as in inductive devices (transformers, motors) and it is used to obtain results that determine safety condition of electrical installations. Therefore, in order to provide conditions for correct operation and accuracy of obtained results, the following recommenda- tions must be observed: ...

  • Page 8: General Settings - Main Menu

    General settings – main menu When the meter is turned on, it displays the main menu. Indication of over- Full memory indicator WiFi signal strength Power supply heating of the power from mains supply adapter, bat- tery or measuring cur- Battery charge rent controller and no level, x –...

  • Page 9: Sound Settings

    Set the inactivity time for blanking the screen and turn- ing off the meter. 2.1.2 Sound settings Click Sound settings button. Click the box to turn on ( or off the sound signals. 2.1.3 PIN code settings The PIN code is used for network connection with the meter. Click PIN code settings but- MMR-650 –...

  • Page 10: Display Brightness Settings

    Use "+" and "-" buttons to set the code and confirm it by pressing OK. The PIN code is used for communication with PC. The factory code is 123. 2.1.4 Display brightness settings Click Display brightness button. Use "+" and "-" buttons to set the desired brightness and confirm it by pressing OK.

  • Page 11: Wi-Fi Configuration

    2.1.5 Wi-Fi configuration Click WiFi configuration but- ton. To see local active WiFi net- works, click Search network button. The meter detected networks secured by password. Click the name of the network to en- ter the password. Enter the password and con- firm it by pressing The meter connects to the net- work, which is automatically...

  • Page 12: Printer Settings

    You may use off button to turn off WiFi. After clicking Prefered net- works button, the meter will display networks saved in its memory. You may delete the network by pressing button. 2.1.6 Printer settings The meter is compatible with Sato CG2 printer. Click Printer settings button.

  • Page 13: Memory Settings

    Memory settings In the main menu, click button. By pressing button, you may enter settings or enter the higher level in the set- tings. Click Memory settings but- ton. 2.2.1 Memory management Click Memory management button. This option allows you to read the % of the used memory and to clear it: after pressing Delete memory all clients are...

  • Page 14: Object Types Database

    2.2.2 Object types database This is a list of types of tested resistive and inductive objects. Click Object types database button. The meter has 4 default types saved in its memory. Use button to add a new type of the tested object. Enter a new type of the object being tested.

  • Page 15: Object Names Database

    2.2.3 Object names database It is a list of names of tested objects or measurement points. Click Object names data- base button. The meter has 4 default names saved in its memory. button to add a new name. Enter the name of the object. Added names may be deleted by pressing MMR-650 –...

  • Page 16: Resistance Limits Database

    2.2.4 Resistance limits database The specified limits may be used to automatically assess the validity of the results of resistance measurements. Click Resistance limits data- base button. Click button, to add a new limit. Click Limit’s name box. Enter the name of the limit. button to go to the lower limit setting.
  • Page 17 Enter the lower limit. Use button to go to the upper limit setting. You can set only one of the limits. button to save the limit in the memory. By press- you may exit without saving. button to cancel the limit.

  • Page 18: Temperature Limits Database

    2.2.5 Temperature limits database The specified limits may be used to automatically assess the validity of the results of temperature measurements. Click Temperature limits da- tabase button. Click button, to add a new limit. Enter and save the limits using the same method as de- scribed in section 2.3.4.

  • Page 19: Material Database

    2.2.6 Material database The database contains the temperature coefficients of resistance for different materials, used in measurements with temperature compensation. Click Material database but- ton. The meter has 5 defaults ma- terials saved in the memory, together with the thermal re- sistance coefficients of: cop- per, aluminium, tin, steel and silver.

  • Page 20: Software Update

    Software update The software of the meter is periodically modified. You may download its current version from www.sonel.pl. In the main menu, click icon Click Software update but- ton. Read the displayed text. To perform an update insert the USB drive with the update...

  • Page 21: Service

    Click OK to run the update or close the window to cancel. NOTE! Update is performed automatically and may be divided into a few stages. During the update, do not turn off the power supply of the meter and do not remove the USB drive. The update process is continued until the meter displays the main MENU screen.

  • Page 22: Language Selection

    2.5.1 Language selection Click Language button. Click the selected language. 2.5.2 Selecting temperature unit Click Temperature button. Click the button of selected unit. MMR-650 – USER MANUAL...

  • Page 23: Selecting The Startup Screen

    2.5.3 Selecting the startup screen Click Startup screen button. Click the selected startup screen (the screen will be au- tomatically shown after turn- ing on the meter). This fea- ture is useful for making measurements of a given type for a longer period. 2.5.4 Changing the date and time Click date button.

  • Page 24: Information About The Meter

    Information about the meter In the main menu, click icon Click About the meter button. The screen will display infor- mation on the meter and its manufacturer. MMR-650 – USER MANUAL...

  • Page 25: Factory (Default) Settings

    Factory (default) settings In the main menu, click icon Click Default settings button. Read the note and click the button to restore the default settings, click button to cancel and return to the menu. The following elements are restored to the default settings: ...

  • Page 26: Communication With Pc

    2.8 Communication with PC Press Connect to PC. On your PC run Sonel Reader or Sonel Reports PLUS. To terminate the connection press MMR-650 – USER MANUAL...

  • Page 27: Measurements

    Measurements  The measurement with temperature compensation is performed when the user wants to know the re- sistance of the object at a certain reference temperature, and the measurement is made at another temperature. Basing on the temperature coefficient of resistance 'α' of the measured object, the meter calculates the resistance value at the reference temperature.
  • Page 28 button to go to the next settings. Switching Unidirectional/Bidi- rectional measurement. Selecting trigger method: - manual: use START/STOP button - automatic: by connecting test leads to the object - continuous: the measurement is triggered and ended by pressing START/STOP button. Boxes for setting the range and measurement current on the screen above correspond to the same boxes shown in the previous screen.
  • Page 29 Click button to enter the temperature settings. After checking "Temperature compensa- tion" box, the meter uses the specified temperatures and temperature coefficient of re- sistance to calculate the resistance at the reference temperature. Turning on/ off the tempera- ture compensa- tion.
  • Page 30 Correct result: R within limits. Incorrect result" R outside limits. – resistance at reference temperature – resistance at the measuring current flowing in the assumed positive direction – resistance at the measuring current flowing in the assumed negative direction – ambient temperature –...

  • Page 31: Testing The Inductive Objects

    Testing the inductive objects When necessary, name the measuring point. When measuring inductive ob- jects, only Auto mode is avail- able - the measuring current is limited to a value not exceed- ing the set value, Setting the measuring current limits.
  • Page 32 Boxes for setting the range and measurement current on the screen above correspond to the same boxes shown in the previous screen.  Bidirectional measurement is used to compensate the potential present at the con- tact point of two different conductors. In this case, the main result of the measure- ment is the average of results from individual directions.
  • Page 33  When you activate the temperature compensation, set all the values (not necessarily the am- bient temperature) to exit to the measurement screen.  The ambient temperature is added to the measurement report. Press button to go to the measurement. Connect the meter to the tested object.
  • Page 34 Incorrect result" R outside limits. – resistance at the measuring current flowing in the assumed positive direction – resistance at the measuring current flowing in the assumed negative direction – ambient temperature – object temperature – reference temperature α - temperature coefficient of resistance –...

  • Page 35: Measurement With Automatic Method Selection

    Measurement with automatic method selection The measurement is per- formed as in the case of test- ing the inductive objects If based on the difference be- tween the instantaneous and average resistance during the result stabilization, the meter determines that the object is resistive, it will complete the measurement faster.
  • Page 36 Switching between Auto/Manual mode: Auto - the measuring current is limited to a value not exceeding the set value, Manual - measuring current has the set value. When measuring inductive ob- jects, only Auto mode is available. Setting the measuring current val- ues or limits.
  • Page 37 Press button, to enter the logger. Connect the meter to the tested object. Press START/STOP. Sample No./number of samples Time interval Logging time button to display the graph of resistance over time - both during the logging pro- cess and after its completion. After the logging process, the result may be entered into the memory by pressing button (see sec.

  • Page 38: Core Demagnetization

    Core demagnetization After completing the winding resistance measurement, the magnetic core of the power transformer or measurement transformer may be magnetized. The demagnetization should be carried out to elimi- nate a source of potential problems. Demagnetization of the magnetic core requires the application of alternating current with decreasing the amplitude to zero.

  • Page 39: Temperature Measurement

    3.6.1 Temperature measurement Connect the temperature probe to the appropriate socket in the meter. Read the temperature. 3.6.2 Windings temperature measurement This function allows to calculate the temperature of windings for a heated object - e.g. motor, basing on the measured winding resistance at ambient temperature and after a period of operation, taking into account the temperature coefficient of resistance known for the winding material.
  • Page 40 The method of supplying the measuring current is non-ad- justable and set on Auto mode - the measuring current is lim- ited to a value not exceeding the set value. Setting the measuring current values or limits. button to go to limit settings (mode, measurement and triggering are set as non- adjustable).
  • Page 41 Click button to enter the temperature settings. Enter the ambient temperature – op- Select a material from tional the database or enter α coefficient for the tested object Enter the tempera- ture of the object or measure it with a thermometer connected to the meter socket.
  • Page 42 Disconnect the test leads from the motor, start the motor. After the desired working time turn off the engine, reconnect the meter to the motor winding and press START/STOP. – resistance of the cold winding – resistance of the hot winding –...

  • Page 43: Memory

    Memory Memory management (clients, objects, measuring points and logs)  The memory may be organized before the measurements, or on a regular basis, af- ter the measurement.  button to enter the memory management for measurements results or to enter a higher level in the memory. 4.1.1 Entering the clients Click button, to enter the...

  • Page 44: Entering Objects, Subobjects, Measurement Points And Logs

    button to save cli- ent's data in the memory. 4.1.2 Entering objects, subobjects, measurement points and logs 4.1.2.1 Entering objects and subobjects Click of the selected cli- ent. To add an object, measuring point or log, click button. MMR-650 – USER MANUAL...
  • Page 45 Click Object button. Click Object name box, to name the object - mandatory. Select one of the default names or enter your own. You may attach an additional description by clicking De- scription box. By clicking Object type box, you may se- lect the default type of or en- ter your own.
  • Page 46 Select one of the default names or enter your own. button, to save the object in the memory. By clicking you can add more objects. By clicking the object field and button, you may enter subobjects in the object etc.- up to 4 levels. MMR-650 –...

  • Page 47: Entering Measurement Points And Logs

    4.1.2.2 Entering measurement points and logs Measuring points and logs may be entered at any memory level, i.e. at the level of client object or subobject. Log is a measuring point distinguished due to performing a series of measurements in one point.
  • Page 48 Select one of the default names or enter your own. By clicking Measurement point’s type box, you may select the default type of or enter your own. For logging, it is possible to add an additional description, similarly as for the object. button to enter a measuring point or log to the memory.

  • Page 49: Storing The Measurement Results In The Memory

    Storing the measurement results in the memory NOTE!  Before performing the next series of measurements at the same measuring points, the previous results must be archived, because for one measuring point, you can save only one result and entering the next will erase the previous one. ...

  • Page 50: Entering The Results Of Measurements Without Previously Organized Memory

    Select the measuring point by clicking its name (indicated by orange border). Save the result by clicking button. 4.2.2 Entering the results of measurements without previously organized memory Method 1 Press button after finishing the measurement. Click button to add a client. MMR-650 –...
  • Page 51 After saving the client click its button and then click button to add the object. After adding and saving the object (also subobjects if nec- essary), click button to add the measurement point. After adding and saving the measuring point, click The result is saved to memory, the meter returns to the measuring mode.
  • Page 52 Method 2 After the measurement or be- fore click Measurement point’s name and enter the name. Press button after finishing the measurement. Click button to add a client. After saving the client click its button and then click button to add the object. MMR-650 –...

  • Page 53: Viewing Memory Data

    After adding and saving the object (also subobjects ac- cording to the needs), click the object and then button - the measuring point with the measurement result will be saved automatically. Having selected the client and object (subobjects) and performing a series of measure- ments on one object, after the measurement and entering the name of the measuring point, click and the click again...
  • Page 54 When using the logger, click- ing the field with results will cause the meter to display the individual samples. You may scroll them using but- tons. Use button to dis- play the graph. MMR-650 – USER MANUAL...

  • Page 55: Search" In The Memory

    "Search" in the memory In order to facilitate searching for an object or device in the memory, a function of memory search is added. To start the function of searching in the memory: Click button. Click of the selected client. In any of the client's window, click button.
  • Page 56 After entering all the search criteria, click button again.  To perform the search, enter the name (or its part) or one of the dates.  The size of letters in the name of searched item is ignored. MMR-650 – USER MANUAL...

  • Page 57: Copying Customer Data From The Memory To Usb Stick And Vice Versa

    Copying customer data from the memory to USB stick and vice versa In the main menu, click then Memory settings and Memory management. Insert the USB stick into the appropriate USB slot of the meter. Click button. Click , to save data in the USB stick or to copy data from the USB stick to the...

  • Page 58: Deleting Data

    Deleting data 4.6.1 Deleting the meter’s memory data ► Memory settings ► Memory management To delete the whole memory, click Delete memory button. 4.6.2 Deleting a client To delete a client: Main menu ►  in location 1 select a client and then icon at the bottom bar,...

  • Page 59: Deleting An Object

    Click YES to confirm deleting or NO to cancel it. 4.6.3 Deleting an object To delete an object or measur- ing point:  go to location Main menu ►  icon go to the client’s using content,  using icon start to edit the selected object…...

  • Page 60: Report Printing

    Report printing Sato CG2 printer must be connected to any of the USB socket of "Host" type. You can print meas- urement results directly after the measurement or stored in memory. Click icon to print it. The printout includes all the results and parameters of the measurement, assessment (positive/neg- ative), the date and time of measurement and data of person performing it, entered in the printer settings.

  • Page 61: Replacing The Battery Pack

    Replacing the battery pack MMR-650 is equipped with a rechargeable lithium-ion battery pack and a charger for charging it. The battery pack is placed in the battery compartment. Battery charger is installed inside the housing of the meter and is compatible only with the manufacturer’s rechargeable battery pack. WARNING If the power cord is left in the socket during replacement of the battery pack, there is a risk of electric shock with a dangerous voltage.

  • Page 62: Cleaning And Maintenance

    - If the electrolyte contained in the Lithium-Ion battery pack, contacts eyes or skin, immediately rinse the affected place with plenty of water and consult a doctor. Protect the battery against unauthorised per- sons and children. - When you notice any changes in the Lithium-Ion battery pack (e.g. changes in colour, swelling, exces- sive temperature), stop using the battery pack.

  • Page 63: Technical Data

    10 Technical data 10.1 Basic data  Abbreviation "m.v." used in the specification of accuracy means a standard measured value. Uncertainty values stated in the table refer to the measurement with bidirectional current and relate to the average of two measurements according to the following formula: ...

  • Page 64: Other Technical Data

    The LAN port may be used to communicate with an external system. This function is optional, available on special order.  SONEL S.A. hereby declares that the radio device type MMR-650 complies with Di- rective 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 65: Manufacturer

    11 Manufacturer The manufacturer of the device and provider of guarantee and post-guarantee service: SONEL S.A. Wokulskiego 11 58-100 Świdnica Poland tel. +48 74 884 10 53 (Customer Service) e-mail: customerservice@sonel.com web page: www.sonel.com NOTE! Service repairs must be performed only by the manufacturer.
  • Page 66 NOTES MMR-650 – USER MANUAL...
  • Page 67 SYMBOLS DISPLAYED BY THE METER Memory Measurement setup mode Settings Saving to memory Return to the main menu Report print Temperature measurement, refer- Help ence temperature Adding a client, object or measuring Presentation of measurement re- point sults in the form of a time chart Searching for an object or measure- Exit from the option ment point...

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Mmr-650

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