NARDA EHP-50F User Manual
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NARDA EHP-50F User Manual

Electric and magnetic field probe - analyzer from 1 hz up to 400 khz
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NARDA
Safety
Test
Solutions
S.r.l. Socio Unico
http://www.narda-sts.it
User's Manual
ELECTRIC AND MAGNETIC
FIELD PROBE - ANALYZER
SERIAL NUMBER OF THE INSTRUMENT
You can find the Serial Number on the bottom cover of the instrument.
The Serial Number is in the form: 000XY00000.
The first three digits and the two letters are the Serial Number prefix, the last five
digits are the Serial Number suffix. The prefix is the same for identical instruments,
it changes only when a configuration change is made to the instrument.
The suffix is different for each instrument
Document EHP50FEN-50501-1.63 – Copyright © NARDA 2015
Sales & Support:
Via Leonardo da Vinci, 21/23
20090 Segrate (MI) - ITALY
Tel.: +39 02 2699871
Fax: +39 02 26998700
EHP-50F
From 1 Hz up to 400 kHz
Manufacturing Plant:
Via Benessea, 29/B
17035
Cisano sul Neva (SV)
Tel.: +39 0182 58641
Fax: +39 0182 586400

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  • Page 1 Serial Number suffix. The prefix is the same for identical instruments, it changes only when a configuration change is made to the instrument. The suffix is different for each instrument Document EHP50FEN-50501-1.63 – Copyright © NARDA 2015...
  • Page 2 NOTE: ® Names and Logo are registered trademarks of Narda Safety Test Solutions GmbH and L3 Communications Holdings, Inc. – Trade names are trademarks of the owners. If the instrument is used in any other way than as described in this Users Manual, it may become unsafe Before using this product, the related documentation must be read with great care and fully understood to familiarize with all the safety prescriptions.

  • Page 3: Table Of Contents

    1.1 Documentation............….………. 1.2 Introduction ……………….....……………………… 1.3 Configuration and Standard accessories....... 1.4 Optional accessories ..........………… 1.5 EHP-50F Main specifications........…………. 1.6 Isotropic E&H field analyzer EHP-50F typical uncertainty and Anisotropy………………………………………………….. 1.6.1 Typical uncertainty of EHP-50F…………………………….. 1.6.2 Explication Notes……………………………………………... 1.7 Anisotropy……………………………………………………….. 1.8 EHP-50F panel........………..………………...
  • Page 4 9 Accessories Page 9.1 Introduction………………….………………………………..9.1.1 Preliminary inspection……..…...………………………….. 9.1.2 Work environment….………………………………………... 9.1.3 Return for repair…………………………………………..… 9.1.4 Cleaning…………………………………………………..…. 9.1.5 Power supply and battery chargers…………………….… 9.2 NBM-550 Controller and display Unit for EHP-50F………. 9.3 USB-OC Optical USB Converter…………………………..9.3.1 Introduction………………………………………………….. 9.3.2 Installation…………………………………………………... Contents...
  • Page 5 Figures Figure Page Block Diagram of the EHP-50F …………………. 3D mesh measurements of magnetic probe……. EHP-50F panel ..………....………….. EHP-TS Installation……………………………….. EHP50-TS Main Window…….…………………… Defining frequency band through the PC mouse Zoom window………………………………………. Data section………………………………………… Waterfall - Graph 2D………………………………. 4-13 Waterfall Main Window…………………………….
  • Page 6 To prevent the possible danger of electrocution, do not remove any covers, panels or guards installed on the device, and refer only to NARDA Service Centers if maintenance should be necessary; To maintain adequate protection from fire hazards, replace fuses only with others of the same type and rating;...
  • Page 7 17035 Cisano sul Neva (SV) – ITALY based on the following harmonized European Standards, successfully applied: Safety: EN 61010-1 (2011) EMC: EN 61326-1 (2007) declares, under its sole responsibility, that the product: EHP-50F E&H Field Analyzer conforms with essential requirements...
  • Page 8 This page has been left blank intentionally VIII Safety Consideration...

  • Page 9: Documentation

    This section provides a general overview of EHP-50F Electric and Magnetic Field Analyzer. EHP-50F is a low frequency electric and magnetic isotropic field probe- analyzer. It provides an advanced technology solution for field analysis in the 1 Hz to 400 kHz frequency range in an extremely high dynamic range.

  • Page 10: Block Diagram Of The Ehp-50F

    EHP-50F is housed in a small cubic housing. The bottom side panel includes an optical fibre connector, extension rod screw, battery charger connector, ON/OFF button and Status LED. Fig. 1-1 Block diagram of the EHP-50F Analyzer The magnetic sensor system is composed by three magnetic loops positioned orthogonal each other.

  • Page 11: Configuration And Standard Accessories

    The EHP-50F, Set for Stand-alone and PC use (P/N 2404/104), is supplied 1.3 Configuration and complete of the following items: Standard Accessories EHP-50F Basic Unit AC/DC Battery Charger Cable, FO Duplex, RP-02, 10m; O/E Converter USB, RP-02/USB Optical Bridge Connector RP-02;...

  • Page 12: Ehp-50F Main Specifications

    When not differently specified the following specifications are referred to operating ambient temperature 23°C and relative specifications humidity 50%. Table 1-1 Technical specifications of the EHP-50F Electric and Magnetic Field Analyzer Electric Field Magnetic Field AUX input (MMCX Zin 1k ) Frequency range 1 Hz ÷...

  • Page 13: And Anisotropy

    1.6 Isotropic E&H field analyzer EHP-50F typical uncertainty and anisotropy The uncertainties stated in this document have been determined according 1.6.1 Typical uncertainty to EA-4/2 [4]. of EHP-50F They were estimated as expanded uncertainty obtained multiplying the standard by the coverage factor k=2, corresponding to a confidence level of about 95%.

  • Page 14: Explication Notes

    a) If we have the certificate with different values of the uncertainty of 1.6.2 Explication Notes calibration, in order to calculate the total expanded uncertainty U , the uncertainty of calibration has to be taken into account: where is the standard uncertainty / 2 ) EHP50 is the standard uncertainty...

  • Page 15: Anisotropy

    1.7 Anisotropy 1) The IEEE 1309 [3] defined the anisotropy (A) as the maximum deviation from the geometric mean of the maximum response and minimum response when the probe is rotated around the ortho-axis (e.g. "virtual handle") as shown in the example in figure below. equation (1) where S is the measured amplitude in field strength units.

  • Page 16: Ehp-50F Panel

    Electromagnetic Field Sensors and probes, Excluding Antennas, from 9 kHz to 40 GHz”. [4] EA European co-operation for Accreditation – Public Reference EA-4/02 M:2013 1.8 EHP-50F Panel Key: 1. Led 2. Battery charger connector 3. ON/OFF button 4. Fiber optic connector Fig. 1-3 Panel of EHP-50F General Information...

  • Page 17: Introduction

    Temperature < 100% relative without condense Humidity When the meter needs to be returned to NARDA for repair, please 2.4 To return for repair complete the questionnaire appended to this User’s Manual, filling in all the data that will be useful for the service you have requested.
  • Page 18 EHP-50F has an internal rechargeable Li-Ion battery that can be recharged 2.6 Power supply and with the battery charger supplied with it. battery recharging Make a full charging cycle before using the Analyzer for longest battery operation time. ALWAYS connect the battery charger to the power supply BEFORE connecting it to the EHP-50F.

  • Page 19: Ehp-50F Connected To A Pc

    Mode connecting it to any external device. With EHP-50F is possible to collect data every 1 minute or every 30 seconds for 24 hours. Later on, it is possible to download all collected data to any PC by using the provided EHP-TS PC software.

  • Page 20: Avoiding Measurement Errors

    EHP-50F for supporting the Analyzer. We also recommend that the TR-02A optional tripod be used for positioning EHP-50F at the height set out in the reference standards for the measurement in progress and that this configuration is always maintained so that the measurements taken can be repeated.

  • Page 21: Ehp-Ts Installation

    EHP family Electromagnetic field analyzers. By means of the recently introduced USB-OC optical to USB converter, EHP-50F and EHP-200A can be connected to a PC USB port. Using the former optical/RS232 adapter, the selected COM port should be assigned to the application software (see cap.5 EHP-TS applications).

  • Page 22: Ehp-Ts Installation

    Before connecting the EM field analyzer to PC the EHP-TS software 3.3 Installing EHP-TS installation should be performed: Software Insert the EHP-TS CD into the driver of your PC and run the file “EHP-TS Setup.exe”. The User must have administrator privileges to install the EHP-TS software in Windows 7, Windows 8;...
  • Page 23 EHP-TS software...
  • Page 24 When asked for, reboot your system to complete installation EHP-TS software is now installed in your PC, you can remove it, if needed, simply running the “Uninstall EHP-TS” application (see cap.8). EHP-TS software...
  • Page 25 Chapter 3. EHP-TS software does not work with EHP50A/B. If the battery charger is plugged in to the EHP-50F while the software is running, the analyzer will be disconnected. During the charging process, always remove the bridge (stand-alone) connector from the EHP-50F Document EHP50FEN-50501-1.63 - ©...

  • Page 26: Ehp50-Ts Main Window

    Application software package. Connect EHP-50F to the USB port of your PC using provided optical fibre and USB-OC optical to USB converter. Optional 8053-OC optical to RS232 converter can be used, as an alternative, to connect the analyzer to the PC RS232 connector.
  • Page 27 Description: 1 - EHP50-TS software release, (communication port) 2 - Shows unit 3 - Click “?” to display EHP-50F analyzer informations 4 – Name and trace of selected Limit 5 - EHP-50F analyzer battery status 6 - Scan activation for each axis (default setting: all axis activated)

  • Page 28: Mode Section

    Dual (Low Range) shows Electric and Magnetic field which full range values are 1kV/m and 100 T respectively. Full scale ranges of Dual (High Range) are therefore 100kV/m and 10mT The EHP-50F is also equipped with an AUX Input (MMCX connector, Zin 1 k full scale value is 10 mV.

  • Page 29: Defining Frequency Band Through The Pc Mouse

    4.4 Span section EHP-50F includes an FFT analyzer to show frequency spectrum of measured field. The span section includes the following: Span: select one of the 8 available spans, keeping in mind that beside the EHP-50F minimum operating frequency of 1 Hz, the minimum start frequency of each Span is 1,2% of Span.

  • Page 30: Zoom Window

    Fig.4-3 Zoom window Also choosing the best scale range 120 dB or 140 dB can be helpful to better distinguish signals and disturbances. Sweep: the two radio buttons in this box allow the user to select the Linear or Logarithmic frequency scale. Logarithmic scale is used to emphathise and clearly display low frequencies even thow high ones are included in the graph.

  • Page 31: Standard

    Standard section allows the user to select standard ICNIRP, IEEE, BGV and 4.5 Standard EC limits, already included by the software installation, as well as user’s limits which can be created through the “Make Limit” function provided by this section. Safety Standard: This section can be used to load a default standard limit saved into the memory at the factory.
  • Page 32 Type frequency and field strength for each point of the required limit and click save to save it under the program directory. The limit file will be created as a linear interpolation between specified points. When the ICNIRP or IEEE limit is selected, the software automatically calculates the corresponding total integration of the measured signals, and compares the result with the threshold set by the standard, considering whether it is or is not exceeded.

  • Page 33: Data Section

    Even if EHP-50F takes measurement over the entire selected span, shown 4.6 Data section results are related to the displayed spectrum only, allowing thus detailed evaluation of user defineable frequency range through the zoom function. Fig.4-4 Data section The gray band on the left side of the graph highlights signals below the minimum start frequency (1,2 % of Span) which are affected by residual 0 Hz peak.
  • Page 34 Four additional frames, Acquisition, Marker, Save and Waterfall, are included in the Data section: Acquisition: spectrum is displayed in different acquisition modes. Here is the choice between instantaneous reading and Root Mean Squared over a certain period, which is set in the proper box. A Max Hold function is also available.
  • Page 35 It is also possible to insert a comment. The user can select the path where the files will be stored. The saved files will be structured as following: Under the selected folder (EHP50-TS in the example) a folder will be created and called like the current year (ex.
  • Page 36 Auto save text extract example Round frequency: when this label is ticked, the frequency indication of the Marker is corrected to the closest round value, thus avoiding approximation errors. Waterfall: press Start Waterfall to run the function, or Open Waterfall to load previously saved measurements.

  • Page 37: Waterfall - Graph 2D

    In addition to the spectrum view, another representation has been 4.6.1 Waterfall introduced in the software, commonly called Waterfall. The advantage of this view is that the disturbances are shown in a tridimensional plot. Two dimensions are, as usual, frequency and level, and the third is the time.

  • Page 38: Waterfall Main Window

    When entering the Open Waterfall function a screen similar to the following appears: Fig.4-6 Waterfall Main Window Like during the scan, on the left is the spectrogram of the measurements. The column in the middle, called Events Horizon, reports the Marker with its frequency and level and many parameters of the measurement setup and of the probe used.

  • Page 39: Waterfall - Graph 3D

    Fig.4-7 Waterfall - Graph 3D In the Graph 3D, one axis (blue) represents Frequency, another the Level (green) and the third the Time (red). So the Frequency can be on the horizontal axis, the Level on the vertical axis and the Time in depth. For this mode, another box, called Movement, will appear.
  • Page 40 Another option of the Graph 3D, the Time plot, is available when the Marker is active. Tick the Time label to enter this view. A new window pops up and the plot represents the level at the marker frequency versus time. The horizontal axis of the grid is the time and the vertical axis is the field level.

  • Page 41: Data Recording

    The subsequent spectra are automatically recorded and saved in a single 4.6.1.1 Data recording file *.WF5 localized in the folder Waterfall in the program root, inclusive of all the analyzer settings. The stored files can be recalled when in Data mode or at startup entering the Open Waterfall window.

  • Page 42: Style Section

    This unit concerns the appearance of the program. 4.7 Style section Buttons and labels styles can be selected from a Style list Start and End Color buttons allow selection from a color palette Sample Button and Sample Label show the appearance preview Default button to set appearance to the default parameters Trace to set trace colours by means of the colour palette Tick the Disable colored bands box to avoid highlighting the bands for...

  • Page 43: Icnirp

    4.8 ICNIRP The International Commission on Non-Ionizing Radiation Protection establishes guidelines for limiting EMF exposure that could affect human health. Standard section allows the user to select standard ICNIRP limits, already included by the software installation. When the ICNIRP limit is selected, the software automatically calculates the corresponding total integration of the measured signals, and compares the result with the threshold set by the standard, considering whether it is or is not exceeded.
  • Page 44 In the screenshot above it is depicted an example how the software shows the calculation of the ICNIRP value for the Electric Field measurement. In the screenshot above it is depicted an example how the software shows the calculation of the ICNIRP value for the Magnetic Field measurement. The limit cannot be activated when using Dual Mode.

  • Page 45: Ieee

    4.9 IEEE One of the purposes of the Institute of Electrical and Electronic Engineers, Inc. ("IEEE") is to establish exposure standards. Standard section allows the user to select standard IEEE limits, already included by the software installation. When the IEEE limit is selected, the software automatically calculates the corresponding total integration of the measured signals, and compares the result with the threshold set by the standard, considering whether it is or is not exceeded.
  • Page 46 In the screenshot above it is depicted an example how the software shows the calculation of the IEEE value for the Electric Field measurement. The limit cannot be activated when using Dual Mode. 4-22 Description...

  • Page 47: Weighted Peak Requirements

    The EHP-50F Weighted Peak (Time Domain) option performs test in the 4.10 Weighted Peak range 1 Hz to 400 kHz to comply with the informative annex of the ICNIRP Function Guidelines 2010 (appendix “Determination of the weighted peak (Time Domain) exposure”) for coherent signal source.

  • Page 48: Ehp-Ts Settings

    4.10.2 EHP-TS Settings The Standard section allows the user to select one of the standard ICNIRP or EU limits for occupational or general public exposure, already included by the software installation. In the Mode section you can select Electric 1 kV/m or Electric 100 kV/m or Magnetic 100uT or Magnetic 10mT.

  • Page 49: Weighted Peak Mode

    Once the Weighted Peak has been enabled, the software shows the result 4.10.3 Weighted Peak of the calculation and its graph over the time. mode Result in percentage over the set hold time The User can set the Hold Time (in milliseconds): The Hold Time is the time resolution of the graph.
  • Page 50 The minimum hold time is of 500 milliseconds. The maximum is 10 minutes. The time span of the graph is 200 times the hold time. The rolling measurement memory deletes all values that date back longer than the set time period. The limit selected is shown in the higher right corner of the graph.

  • Page 51: Dynamic Ranges

    The User should make use the following information to choose the proper 4.10.3.1 Dynamic ranges setting for the desired measurement. For every situation, the best choice is to adopt the lower Full Scale available (for example 100 μT) until the meter indicates an over-range warning;...
  • Page 52 For convenience, a noise threshold has been established, under which the field indication becomes “LOW”, as in the example below. 4-28 Description...

  • Page 53: Shorting Loop

    Wait 24 hours for the completion of the one-day measurement. The led of EHP-50F will flash every second to inform that it is ON with red light. After every minute (or 30 sec) the led will become green for the time requested by the analyzer to perform one measurement.

  • Page 54: Ehp-50F Data Logger

    Once the data has been collected by EHP-50F, you should connect it to the 5.2 EHP-50F Data PC to download all measurement results. Logger Run “EHP-50F Stand Alone mode” application 5.2.1 Run EHP-50F-Stand Alone mode software During the communication process for searching the analyzer EHP-50F,...
  • Page 55 It is possible to set the date & clock inside the EHP-50F by transferring the actual date & time of your PC. Pushing the button Set Date & Clock you will get the following window: Answering YES, the date & time of your PC will be transferred inside the analyzer.
  • Page 56 If the checkbox Include Id is activated, a number representing the position of the data inside the EHP-50F memory will be shown, like in the following example. Push the button Download to transfer all data from the...

  • Page 57: Use Ehp-50F Logger

    Starting date and time All values collected 5.2.3 EHP-50F battery If the battery charger is plugged to the EHP-50F while the software is running, the analyzer will be disconnected and the software will display: charging and the led is flashing quickly.
  • Page 58 This page has been left blank intentionally EHP-50F Stand alone mode...

  • Page 59: Ehp-50F Upgrading Utility Main Window

    This section provides all the information required for firmware updating. The Update Firmware Program is available after EHP-TS package installation. Turn off the EHP-50F and connect it to a free USB or RS232 port of the 6.2 To run the update software Run EHP-50F Update Firmware to start the update program.
  • Page 60 In case the software doesn’t detect any EHP-50F in the USB port, the following message will be displayed. As soon as the connection is established, a message informs to turn the EHP-50F OFF and turn it ON again; press OK to confirm.
  • Page 61 At the end, a message informs if the update has been successfully performed. Turn the EHP-50F OFF (it could seem to be already OFF but it is not) and turn it ON again. The EHP-50F is now updated with the new version of the internal firmware or FPGA.
  • Page 62 This page has been intentionally left blank Firmware Update...

  • Page 63: Uninstalling Ehp-Ts

    Fig. 7-1 Uninstalling EHP-TS Before removing any shared system file, the uninstaller will ask for a confirmation. Answer “NO” in case you are not sure whether the showed system file is required for other applications. Document EHP50FEN-50501-1.63 - © NARDA 2015 Uninstalling Software...
  • Page 64 EHP-TS software is now removed from the system, click “Finish” to close uninstaller utility Uninstalling Software...

  • Page 65: Uninstalling Usb-Oc

    The following procedure shows how to remove the driver in Windows XP environment. It may be different depending on the operating system in use. Open the Windows Control Panel. Double click “Application Installation”. Document EHP50FEN-50501-1.63 - © NARDA 2015 Uninstalling USB-OC...
  • Page 66 From the application list select “FTDI FTD2XX USB Drivers” and click “Change/Remove”. Fig.8-1 Uninstalling USB-OC Unplug the USB-OC converter, if connected, and click “Continue”. Click “finish” to exit the uninstaller, USB driver is now removed from your system. Uninstalling USB-OC...

  • Page 67: Introduction

    Battery Charger) < 95% relative Humidity When the Accessories need to be returned to NARDA for repair, please 9.1.3 Return for repair complete the questionnaire appended to this User’s Manual, filling in all the data that will be useful for the service you have requested.
  • Page 68 EHP-50F accessories are powered by either internal rechargeable 9.1.5 Power supply and batteries or directly from other devices to which they are connected. battery chargers The AC/DC battery charger can be used with a power frequency at either 50 Hz or 60 Hz with a supply voltage between 100 and 240 AC Volt.

  • Page 69: Nbm-550 Controller And Display Unit For Ehp-50F

    NBM-550 Controller and Display Unit for EHP-50F EHP-50F can be easily operated using the Broadband Field Meter NBM- 550 as a controller and display unit. In order not to influence the field to be measured, communication between the EHP-50F Analyzer and the NBM Unit is through a rugged optical fibre cable.
  • Page 70 NBM-550 screenshots of EHP-50F results: Fig. 9-3 Monitor Mode Fig. 9-4 XYZ Mode Fig. 9-5 Spectrum Mode Fig. 9-6 Standard Mode (ICNIRP) Fig. 9-7 Weighted Peak Mode Fig. 9-8 Weighted Peak Marker Accessories...

  • Page 71: Usb-Oc Adapters

    NBM-550 Broadband meter Either USB-OC or 8053-OC is indispensable for updating the internal firmware of the above-mentioned items via a Personal Computer and the relative update software is available free-of-charge on NARDA’s Web site at: http://narda-sts.it 9.3.2 Installation Insert USB-OC in the connector of a free USB port of the PC, connect the fiber optic coming from the probe or other Accessories treating the locating key with care.
  • Page 72 This page has been intentionally left blank Accessories...
  • Page 73 Moreover, we are continuously improving our quality, but we know this is a never ending process. We would be glad if our present efforts are pleasing you. Should one of your pieces of NARDA equipment need servicing you can help us serve you more effectively filling out this card and enclosing it with the product.
  • Page 74 Suggerimenti / Commenti / Note: Suggestions / Comments / Note:...

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