Sonel MMR-620 User Manual
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Sonel MMR-620 User Manual

Low-resistance meter
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Summary of Contents for Sonel MMR-620

  • Page 3 USER MANUAL LOW RESISTANCE METER MMR-620 ● MMR-630 SONEL S. A. Wokulskiego 11 58-100 Świdnica Poland Version 3.00 16.11.2021...
  • Page 4 We appreciate your having purchased our low-resistance meter. The MMR-620 / 630 meter is a mod- ern, high-quality measuring device, which is easy and safe to use. Please acquaint yourself with the present manual in order to avoid measuring errors and prevent possible problems related to operation of the meter.

  • Page 5: Table Of Contents

    8 Dismantling and utilization ................29 9 Technical data ....................30 10 Accessories ....................32 10.1 Standard accessories ..................... 32 10.2 Optional accessories ....................32 11 Manufacturer ....................33 12 Laboratory services ..................34 MMR-620 ● MMR-630 – USER MANUAL...

  • Page 6: Safety

    In case of measurements of installations, sub-assemblies and devices under a dangerous voltage, the MMR-620 / 630 meters may solely be operated by qualified personnel who are properly au- thorised to work on electric installations. Operation of the meter realised by unauthorised person- nel may result in damage to the device and constitute a source of danger for the user.

  • Page 7: Menu

    Menu The menu is available at any position of the knob but MEM. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 8: Lcd Contrast

    3. Start the appropriate programme in the computer and follow the instructions. Measurement mode The MENU-Measurement mode option is described in Chapter 3.1 Display settings The MMR-620 / 630 meter permits selection of two modes of presentation of measurement results: MMR-620 ● MMR-630 – USER MANUAL...

  • Page 9: Result Display Configuration

    ESC button. The limits of the acceptable range of the measurement results is set in MENU: MMR-620 ● MMR-630 – USER MANUAL...
  • Page 10 MMR-620 ● MMR-630 – USER MANUAL...

  • Page 11: Default Settings

     limits in the window mode: upper limit – 199,9Ω, lower limit – 0 Ω, upper limit – 1999,9Ω, lower limit – 0 Ω,  window mode off,  result display – all results. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 12: Selection Of The Language

    The user may perform manual calibration of the meter, provided they have standard resis- tors, minimum grade 0.05%, of the following nominal values: 0,2m, 2m, 20m, 200m, 2, 20, 200 and 2k. Calibration is performed separately for each range. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 13: Auto-Calibration

    It is possible to upgrade the control programme without having the meter serviced. Should upgrading be necessary, the following actions will be realised:  Download the meter programming software from the manufacturer’s web site (www.sonel.pl),  Connect the meter to a computer, ...

  • Page 14: Information On The Manufacturer And The Programme

    In order to obtain basic information on the manufacturer of the meter and the version of the pro- gramme, perform the following actions:  in MENU select About producer & programme,  press the button MMR-620 ● MMR-630 – USER MANUAL...

  • Page 15: Measurements

    This is done by selection of the appropriate options in MENU – Measurement mode. 3.1.1 Selection of the type of object The MMR-620 / 630 meter permits selection of one of the three types of objects: The measurement marked with the symbol is the shortest measurement (3s) and its purpose is to test objects of purely resistance-related character.

  • Page 16: Flow Of Current

    If the single-direction flow of current is selected the resistance value R is not displayed. 3.1.3 Measurement triggering The MMR-620 / 630 meter has three modes of measurement triggering: normal, automatic and continuous.  In the normal mode one measurement of resistance is performed.

  • Page 17: Saving To Memory

    3.1.5 Measurement range selection For the purpose of measurement of the resistance of the object the MMR-620 / 630 meter applies measurement currents within the range between 0.1mA and10A. The measurement range and thus the measurement current may be selected automatically or manually.

  • Page 18: Connection Of The Meter And Start Of Measurements

    Press button to go to the measurement mode. Connection of the meter and start of measurements NOTE! Connection of a voltage exceeding 440VAC between any two measurement termi- nals may cause damage to the meter. MMR-620 ● MMR-630 – USER MANUAL...
  • Page 19 The appearance of the screen may differ depending on the configuration of MENU – Meas- urement mode. MMR-620 ● MMR-630 – USER MANUAL...
  • Page 20 During the measurement a moving horizontal line is displayed. The measurement may be interrupted pressing button ESC. Depending on the measured object, the measurement may last between 3s ( ) to a couple of minutes ( MMR-620 ● MMR-630 – USER MANUAL...
  • Page 21 This is also signalled by the symbol „OFL”, which is displayed once the measurement has concluded. NOTE! Measurement leads must not be disconnected from the object during its discharg- ing. MMR-620 ● MMR-630 – USER MANUAL...
  • Page 22  after the START button is in I circuit! pushed. Unstable conditions due to incorrect contact of the measurement Unstable conditions! leads or excessive inductivity of the object, which preclude measure- ments. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 23: Memory Of The Measurement Results

    Memory of the measurement results MMR-620 / 630 meters are equipped with a memory of 990 resistance measurement results. The location within the memory where a single result is saved is called a memory cell. The whole memory is divided into 10 banks comprising 99 cells. Each result may be saved in a cell of a selected...

  • Page 24: Automatic Saving Of Measurement Results In The Memory

    - In the automatic mode of measurement release after a modification of the number of the bank or cell, exit the setting mode using the button or ESC, or start the first measurement using the button START. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 25: Memory Browsing

    Memory browsing Memory erasing MMR-620 ● MMR-630 – USER MANUAL...
  • Page 26 MMR-620 ● MMR-630 – USER MANUAL...

  • Page 27: Power Supply

    Replacement of accumulators The MMR-620 / 630 meter is equipped with a package of NiMH accumulators and a charger. Those accumulators have a series of advantages, such as lack of harmful substances, no memory ef- fect, higher capacity as compared to NiCd accumulators at the same size.

  • Page 28: Charging Of Accumulators

    After approximately 5 seconds (the time is roughly indicated by the progress bar) the meter automati- cally passes to the charging mode indicated with a frame. In order to change the charging mode, pro- ceed as follows: MMR-620 ● MMR-630 – USER MANUAL...
  • Page 29 - As a result of interferences in the network it is possible that the process of charging of accumulators will finish too fast. In the case too short a time of charging is detected it is necessary to remove the plug of the charger and start charging anew. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 30: General Principles Regarding Using Ni-Mh Accumulators

    However charging at a high temperature of the environment apart from reducing the lifetime causes an accelerated increase of the temperature of the accumulator, which will be not charged to its full capacity. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 31: Cleaning And Maintenance

    Worn-out electronic equipment should be sent to a collection point in accordance with the law of worn-out electric and electronic equipment. Before the equipment is sent to a collection point, do not dismantle any elements. Observe the local regulations concerning disposal of packages, worn-out batteries and ac- cumulators MMR-620 ● MMR-630 – USER MANUAL...

  • Page 32: Technical Data

    Basic uncertainty Current 0...999,9 0,1 1,0000...1,9999m 0,0001m 2,000...19,999m 0,001m 20,00...199,99m 0,01m (0,25% m.v. + 2 digits) 200,0...999,9m 0,1m 0,1A 1,0000...1,9999 0,0001 10mA 2,000...19,999 0,001 20,00...199,99 0,01 0,1mA 200,0... 1999,9 0,1  Input voltmeter impedance: 200k MMR-620 ● MMR-630 – USER MANUAL...
  • Page 33 Protection grade of the casing in accordance with EN 60529 ........IP54 d) Protection from external voltage ..........up to 440V AC for 10s e) Power supply of the meter ..package of ACCUMULATORS SONEL/NiMH 4,8V 3Ah Power supply of the charger ..........100..250V/50..60Hz, 200mA g) Charging time ................

  • Page 34: Accessories

    10.2 Optional accessories Furthermore, the manufacturer and authorised distributors offer the following elements which are not included in the basic accessories package: WAZACKEL1 WAADAUSBRS232   USB/RS232 adapter Kelvin clamp with a double cable MMR-620 ● MMR-630 – USER MANUAL...

  • Page 35: Manufacturer

    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 Note: Solely the manufacturer is entitled to provide guarantee service. MMR-620 ● MMR-630 – USER MANUAL...

  • Page 36: 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 37 NOTES MMR-620 ● MMR-630 – USER MANUAL...
  • Page 38 NOTES MMR-620 ● MMR-630 – USER MANUAL...

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Mmr-630

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