NARDA NBM-520 Operating Manual
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NARDA NBM-520 Operating Manual

Broadband field meter
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Narda Broadband Field Meter
Operating Manual
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  • Page 1 NBM-520 Narda Broadband Field Meter Operating Manual Arrow.com. Downloaded from...
  • Page 2 Narda Safety Test Solutions GmbH Sandwiesenstraße 7 72793 Pfullingen, Germany ® Names and Logo are registered trade- marks of Narda Safety Test Solutions GmbH - Trade names are trademarks of the owners. © 2022 Order no.: 2403/98.21 Edition: 05/01.2022, A...

  • Page 3: Table Of Contents

    Dangers from AC adapter/charger ..... . . 10 Preparing the NBM-520 for use ......11 Unpacking.
  • Page 4 Probe with threaded coupling connector ....21 Measuring with the NBM-520 ......23 Avoiding measurement errors .
  • Page 5 NBM-520.........
  • Page 6 Contents NBM-520 Narda Arrow.com. Downloaded from...

  • Page 7: Useful Information

    Useful information This chapter contains basic information about measuring electromagnetic fields and about using the NBM-520. Measuring electromagnetic fields (page 2) About this instrument (page 2) About this operating manual (page 4) Narda NBM-520 Arrow.com. Downloaded from...

  • Page 8: Measuring Electromagnetic Fields

    Probes for various measurement applications are connec- ted to the NBM-520 basic unit. Flat frequency response probes are available, as well as so-called shaped probes that evaluate the field according to a specific human safety standard.

  • Page 9: Applications

    1.2 About this instrument Applications The NBM-520 makes precision measurements for human safety purposes, particularly in workplace environments where high electric or magnetic field strengths are likely. It can also be used to demonstrate the electromagnetic com- patibility (EMC) of devices and equipment.

  • Page 10: About This Operating Manual

    Indicates a hazardous situation which, if not avoided, will DANGER result in death or serious injury. Structure of warnings All warnings are structured as follows: SIGNAL WORD Type and source of danger Consequences of failure to observe warning  Instructions for preventing danger NBM-520 Narda Arrow.com. Downloaded from...

  • Page 11: Terminology

    Indicates a cross reference to another part of the docu- ment. Click on the blue type in the PDF document to jump directly to the cross reference. Terminology Item Meaning Battery Rechargeable battery Dry battery Non-rechargeable battery Narda NBM-520 Arrow.com. Downloaded from...
  • Page 12 1 Useful information NBM-520 Narda Arrow.com. Downloaded from...

  • Page 13: Safety Instructions

    Safety instructions This chapter contains important instructions on how to use the NBM-520 safely. Please therefore read this chapter carefully and follow the instructions closely. Using this operating manual (page 8) Proper use (page 8) Improper use (page 8) Dangers from electromagnetic fields (page 9)

  • Page 14: Using This Operating Manual

    Improper use The NBM-520 is not a warning device that gives active notice of the existence of dangerous fields by means of a visible or audible warning signal.

  • Page 15: Dangers From Electromagnetic Fields

     Affix labels of any type only to the black probe shaft.  If the instrument malfunctions, take it out of service and contact your Narda Service Center. The addresses are listed at the end of this operating manual and on the In- ternet at http://www.narda-sts.com.

  • Page 16: Dangers When Handling Rechargeable Batteries

    Dangers when handling rechargeable batteries When handled improperly, rechargeable batteries can overheat, explode, or ignite.  Only use the NBM-520 with NiMH rechargeable batter- ies (AA, Mignon).  Do not use dry batteries.  Do not replace individual batteries; always replace the entire set.

  • Page 17: Preparing The Nbm-520 For Use

    Preparing the NBM-520 for This chapter describes all you need to do before starting to use the NBM-520. Unpacking (page 12) Instrument overview (page 15) Power supply (page 17) Connecting the probe (page 20) Narda NBM-520 Arrow.com. Downloaded from...

  • Page 18: Unpacking

    3 Preparing the NBM-520 for use Unpacking Packaging The packaging is designed to be re-used as long as it has not been damaged.  Keep the original packaging and use it whenever the in- strument needs to be shipped or transported.

  • Page 19: Transport Damage

     Check the instrument and all accessories for damage when you have unpacked them.  If the instrument is damaged, contact your Narda Ser- vice Center. The addresses of your Narda Service Center are listed at the end of this operating manual and on the Internet at http://www.narda-sts.com.

  • Page 20: Equipping The Case

    3 Preparing the NBM-520 for use Equipping the case You can use the case provided to store a wide range of optional accessories in addition to the items supplied. The figures below show the compartments in the case lid and case base.

  • Page 21: Instrument Overview

    3.2 Instrument overview Instrument overview Narda NBM-520 Arrow.com. Downloaded from...
  • Page 22 3 Preparing the NBM-520 for use Probe connector socket Display Operating panel Hold or Start / Stop button Freezes the display value, or start / stop measurement for spatial measurements Mode button Selects the display mode for the measured values...

  • Page 23: Power Supply

    We do not recommend that you operate the instrument with the AC Adapter / Charger connected, as this can signifi- cantly degrade the measurement performance of the NBM-520. The measurement accuracy figures given in the specifications cannot then be guaranteed. Operation from rechargeable batteries The rechargeable NiMH batteries for this device are packaged separately.
  • Page 24 3 Preparing the NBM-520 for use Charging the batteries If the device is probably not going to be used for several weeks, it should be recharged before being stored to avoid the possibility of deep discharge of the batteries. If storage is likely to be for a period of more than two months, remove the batteries from the device after recharging them.

  • Page 25: Charge State And Power Source Indicator

    The charge level is indicated in 20% steps by black bars within the battery symbol. The batteries are fully charged when all five bars are shown. Power is supplied by the AC Adapter / Charger. The batteries are charged at the same time. Narda NBM-520 Arrow.com. Downloaded from...

  • Page 26: Connecting The Probe

    “Ordering information” on page 55, as well as in the data sheets of the NBM-520 and NBM probes. These documents can also be downloaded from the Narda web site on the Internet at^http://www.narda-sts.com. NOTICE...

  • Page 27: Probe With "Push-Pull" Connector

     Push the probe plug (10) straight down into the probe socket (1) until it clicks into place.  The NBM-520 detects the probe type automatically. The probe type is displayed top left when you switch on the instrument.
  • Page 28 3 Preparing the NBM-520 for use NBM-520 Narda Arrow.com. Downloaded from...

  • Page 29: Measuring With The Nbm-520

    Measuring with the NBM-520 This chapter describes how to make measurements using the NBM-520. Avoiding measurement errors (page 24) Switching on (page 26) Displaying the instrument settings (page 26) Self test (page 29) Setting the contrast (page 29) Overview of the display (page 30)

  • Page 30: Avoiding Measurement Errors

    4 Measuring with the NBM-520 Avoiding measurement errors The measurement result can be falsified by external influences when measuring electromagnetic fields. Considerable measurement deviations can occur under certain circumstances, particularly when measuring low field strengths. The following tips may be of assistance in recognizing sources of interference so as to avoid measurement errors.

  • Page 31: Strong Low Frequency Fields

    Increase the distance from the source of low frequency interference or use a probe that has a higher frequency cutoff point at the lower end of its range. Further useful information can be found under FAQ at www.narda-sts.com Narda NBM-520 Arrow.com. Downloaded from...

  • Page 32: Switching On

    4 Measuring with the NBM-520 Switching on You can switch the instrument on as soon as you have pre- pared it for use.  Press the ON/OFF button to switch the instrument on.  The instrument displays the instrument settings and performs a self test.
  • Page 33 AVG TIME This value specifies the time period over which the results are averaged. You can use the PC software to set this time period between 4 s and 30 min in steps of 2 s. The default setting is 6 minutes. Narda NBM-520 Arrow.com. Downloaded from...
  • Page 34 4 Measuring with the NBM-520 SPATIAL This item displays the measurement method currently selected for determining the spatial average. The following settings are possible: • Spatial Discrete Individual measurement values are recorded and averaged. • Spatial Continuous The measurement values are recorded and averaged continuously.

  • Page 35: Self Test

     Press the ON/OFF button again to switch the instrument off and then switch it on again. If an error message is displayed again:  Switch the instrument off and contact your nearest Narda Service Center. Setting the contrast You can change the display contrast dependent of the envi- ronment lighting in order to achieve optimal instrument read-out.

  • Page 36: Overview Of The Display

    Field type / REMOTE displays during a remote con- trolled measurement Value is outside probe measurement range Selecting the result type The NBM-520 can display the results in various ways: • ACT (Actual) (page 31) • MAX (Maximum) (page 31) AVG (Average) (page 31) •...

  • Page 37: Act (Actual)

    6 minutes. The units of the measured value can be switched at any time without affecting the results already averaged. Narda NBM-520 Arrow.com. Downloaded from...

  • Page 38: Spatial (Spatial Average)

    4 Measuring with the NBM-520 The period of time over which the average is taken can be set using the PC software. The progress of forming the average is shown by the remaining time display. The time counts down to 0. When the averaging time has elapsed, the remaining time display is no longer shown.

  • Page 39: Selecting The Units

    2. Press the Hold button to start the measurement.  The elapsed measurement time is shown top left in the display. 3. Move the NBM-520 smoothly through the volume to be measured and then press the Hold button again to end the measurement.

  • Page 40: Freezing A Result

    4 Measuring with the NBM-520 The results from shaped probes are always displayed in %. A shaped probe provides a frequency sensitivity that mirrors a particular standard, such as ICNIRP. Values in % (of stan- dard) are related to the equivalent power density limit, not to the field strength.

  • Page 41: Using The Alarm Function

    (see “Overview of the display” on page 30). To deactivate the alarm function  Set the parameter ALARM to OFF using the PC soft- ware. Narda NBM-520 Arrow.com. Downloaded from...

  • Page 42: Remote Control

    The NBM-520 can be remote controlled using the NBM-TS software or from an NBM-550 measuring set. This allows you to use the NBM-520 in places that are difficult to reach and read the results without needing to see the actual dis- play on the NBM-520.

  • Page 43: Instrument Settings During Remote Control Operation With Nbm-Ts Or With Nbm-550 As The Controller

    Instrument settings during remote control operation with NBM-TS or with NBM-550 as the controller NBM-520 instrument settings are not changed in either of these remote control modes. While operating remotely, the instrument also displays the results in the measurement mode and the unit that were set before activating remote control operation.
  • Page 44 4 Measuring with the NBM-520 NBM-520 Narda Arrow.com. Downloaded from...

  • Page 45: Pc Software

    This chapter gives you some basic information about the NBM-TS PC software. It explains the possible applications of the software, how to connect the NBM-520 to the PC and the settings you need to make on the NBM-520. It also describes how to update the NBM-520 software using the PC software.

  • Page 46: Using The Pc Software

    • USB driver (installed with the software) Connecting the NBM-520 You can connect the NBM-520 to the PC using the optical interface and the O/E converter. Use the 2 m long optical data cable supplied with the NBM-520 for this purpose. Lon- ger cables are available as accessories.

  • Page 47: Changing The Instrument Settings

    • LIMIT SHAPED • ALARM Updating the firmware You can update the firmware of the NBM-520 in order to make use of new or improved functions. You can only update the firmware using a PC on which the NBM-TS PC software has been installed.
  • Page 48 The NBM-TS software automatically directs you with a simple mouse click to the corresponding web site in or- der to search for a newer version of both the NBM-520 firmware as well as the NBM-TS software. Always use the most recent NBM-TS version to perform a firmware update.

  • Page 49: Instrument Maintenance

    This chapter describes how to clean the instrument, replace the batteries, dispose the instrument and check the instru- ment for proper operation. Cleaning the instrument (page 44) Replacing / removing the batteries (page 44) Disposal (page 47) Checking for proper operation (page 48) Narda NBM-520 Arrow.com. Downloaded from...

  • Page 50: Cleaning The Instrument

    2. To prevent streaks and spots, wipe off the instrument with a dry cloth while it is still damp. Replacing / removing the batteries The rechargeable batteries have a useful life of about 1000 charge cycles or 3 years (whichever occurs soonest). NBM-520 Narda Arrow.com. Downloaded from...
  • Page 51 Improper replacement of batteries Overheating, explosion, or ignition of rechargeable batteries/batteries or their surroundings  Only use the NBM-520 with NiMH rechargeable batter- ies (AA, Mignon).  Do not use dry batteries.  Do not replace individual batteries; always replace the entire set.
  • Page 52 Make sure you insert them the right way round according to the diagram on the base of the battery compartment. 5. Close the battery compartment. 6. Connect the AC Adapter / Charger and charge the batteries (a complete charge cycle takes about 2 hours). NBM-520 Narda Arrow.com. Downloaded from...

  • Page 53: Disposal

    In the European Union, all electronic measuring systems purchased from Narda after August 13, 2005 can be returned at the end of their useful life.  For more information, please contact your Narda distrib- utor.

  • Page 54: Checking For Proper Operation

    This is espe- cially important for thermocouples because the sen- sors can be affected by various mechanical and environmental stressors. Narda offers portable sources to accomplish this im- “Accessories” portant step (see on page 57).
  • Page 55 The meaning of the channels varies depending on the type of probe and is irrelevant for this test. For more details about the probe, refer to the data sheet. Narda NBM-520 Arrow.com. Downloaded from...

  • Page 56: Appropriate Test Sources

     HF3061   HF0191   EA5091 –  EB5091 –  EC5091 –  ED5091 –  EF5091 –  EF5092 –  1) PMR Pocket Radios are commonly available in electronics stores. NBM-520 Narda Arrow.com. Downloaded from...

  • Page 57: Specifications

    Specifications This chapter lists the specifications of the NBM-520. The technical specifications may change due to product developments. The latest technical specifications can be found in the datasheet of the product. The datasheet can be downloaded from the Narda website www.narda-sts.com...

  • Page 58: Display

    1 start bit, 1 stop bit Probe connection Plug and play with automatic recognition, compatible with all NBM-series probes, integration time for measuring input approx. 270 ms, measurement sampling rate 5 Hz (5/50/60 Hz for remote operation) NBM-520 Narda Arrow.com. Downloaded from...

  • Page 59: General Specifications

    2K4 (IEC 60721-3) restricted to -30 °C to +70 °C Operating 7K2 (IEC 60721-3) for the basic unit extended to -10 °C to +50 °C Mechanical Storage 1M3 (IEC 60721-3) Transport 2M3 (IEC 60721-3) Operating 7M3 (IEC 60721-3) Ingress Protection IP 42 (IEC 60529) Narda NBM-520 Arrow.com. Downloaded from...

  • Page 60: Ac Adapter / Charger Unit

    • Operation 0 °C to +40 °C Declaration of Conformity Hereby, Narda STS declares that this device is in compli- ance with the directives 2014/30/EU, EN 61326-1:2013, 2014/35/EU, EN 61010-1:2010, and 2011/65/EU. The full text of the EU declaration of conformity is available at www.narda-sts.com.

  • Page 61: Ordering Information

    Ordering information This chapter lists the ordering information for the NBM-520, probes and accessories. NBM-520 (page 56) Probes (page 56) Accessories (page 57) Narda NBM-520 Arrow.com. Downloaded from...

  • Page 62: Nbm-520

    8 Ordering information NBM-520 NBM-500 Set 2, Narda Broadband Field Meter 2400/102B contains: • NBM-520 Basic Unit (2403/01B) • Rigid shell case for basic unit and up to two probes (2400/90.07) • Power supply, 9 VDC, 100 - 240 VAC (2259/92.06)

  • Page 63: Accessories

    Cable, FO Duplex (1000 m) RP-02, 5 m 2260/91.09 Cable, FO Duplex (1000 m) RP-02, 10 m 2260/91.07 Cable, FO Duplex (1000 m) RP-02, 20 m 2260/91.03 Cable, FO Duplex (1000 m) RP-02, 50 m 2260/91.04 Narda NBM-520 Arrow.com. Downloaded from...
  • Page 64 8 Ordering information NBM-520 Narda Arrow.com. Downloaded from...

  • Page 65: Index

    Declaration of origin 54 Proper use 8 Discrete spatial measurement 32 Display backlight 27 Disposal 47 Rechargeable batteries Proper handling of 19 Remote control 36 Electromagnetic fields, Dangers from 9 Error message 29 Safety instructions 7 Narda NBM-520 Arrow.com. Downloaded from...
  • Page 66 Specifications 51 Switching off 37 Switching on 26 Symbols and marks 5 Terminology 5 Test sources 50 Transport and storage 14 Transport case 14 Transport damage 13 UNIT 28 Unpacking 12 Using the alarm function 35 NBM-520 Narda Arrow.com. Downloaded from...
  • Page 67 Arrow.com. Downloaded from...
  • Page 68 Narda Safety Test Solutions GmbH Sandwiesenstrasse 7 72793 Pfullingen, Germany Phone +49 7121 97 32 0 info@narda-sts.com Narda Safety Test Solutions North America Representative Office 435 Moreland Road Hauppauge, NY11788, USA Phone +1 631 231 1700 info@narda-sts.com Narda Safety Test Solutions S.r.l.

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