NHT-3D User Manual
Contents
1. Fig 6 1 1 P N NHT 3D Part Number 2 SIN NHT 3D Serial Number 3 Prd NHT 3D production date 4 Cal NHT 3D calibration date Fig 6 2 shows the second screen displayed after the power on reporting memory status information and the setting of some parameters Fig 6 2 NHT 3D 6 Operazioni 5 FwVers Firmware version running on the instrument 6 Batt Batteries charge status 7 Snaps Number of single measurements stored in the NHT 3D internal memory After the power on information sequence if a probe is already connected to the instrument then the following information are displayed see fig 6 3 The same information are displayed each time a probe is connected to the instrument they persist on the screen for some second 11 13 Fig 6 3 9 P N Probe Part Number 10 S N Probe Serial Number 11 Probe production date 12 Cal Probe calibration date 13 Probe frequency interval In the absence of a probe if any probe is present or after a probe disconnection then the following screen is displayed Fig 6 4 Fig 6 4 16 NHT 3D 6 Operazioni The tool then performs a warm up phase during this phase the sequence of zeros blinks The session ends when the sequence of zeros stops blinking Fig 6 52. Fig 65 6 2 Main measuring screen After the power on operation and probe connection and elapsed a probe warm up time depending on the specific probe during the warm up phase the display shows zero blinking values finally the main measure screen appears Fig 6 6 10 11 vy Fig 6 6 1 Measurement unit As default the unit shows the parameter related to the connected probe V m for E probes uT for B probes 2 Temperature lt shows the environmental temperature measured by the integrated sensor on the front part of the unit The temperature value shown is surely reliable when the unit is working on a tripod and not in the user s hand that could affect the result 3 GPS coordinates Pressing GPS ON key the GPS integrated module is enabled after around 2 minutes in outdoor conditions it is possible to read the GPS coordinates related to the measuring site The Longitude and Latitude coordinates alternate on the display 4 Data and time Date and clock alternates on the display 17 NHT 3D 6 Operazioni 5 Charge status This icon refers to the charge status of batteries 6 Measured value It is the instantaneous isotropic measured field value 7 MAX value It displays the maximum value occurred since switching on or since the last reset This value is updated only if a higher value occurs To r
3. This key produces Root Mean Square which is shown in 5 the acquisition window in the time domain Indicates the maximum peak of the measured field Indicates the frequency with the highest spectral content This function allows the user to export continuous monitoring diagrams graphics in the time and frequency domains together with the parameters and indexes indicated on the control panel It is possible to carry out this operation export images without using the mouse by pressing the CTRL keys this facility is useful when the user wishes to insert markers at a specific point in an image and export the graphics together with the inserted markers 26 NHT 3D 7 Software Waves 7 5 Measurements functions All the automatic signal measurements and calculations are referred to the isotropic value of acquired data and not to the single axis signals it must be taken in account that from one side the WP index is calculated by the hardware on a signal band of 100kHz indipendently from selected span to the other side 1198 index is calculated by the software considering the available frequency samples and so it s strongly influenced by the selected span in example if the span is 2 KHz then it will be calculated for the signal components up to 2 kHz The calculated index and statistic values are described below Function Maximum value reached at the Weighted Peak filter output WP
4. 566 v m amp 16 10 41 03 12 13 46 7 Vim 55 0 0 0 0 20kHz Occ 21 1 J 6 03 12 13 16 14 50 18 2 Vim 21 6 V m 16 7 V m 32 9 v m 566 v m 16 10 41 03 12 13 44 7 Vim 56 0 01 0 0 20kHz Occ 19 8 J y 03 12 13 16 16 13 15 6 Vim 20 6 Vim 14 5 v m 29 6 v m 566 v m amp 16 10 41 03 12 13 42 9 Vim 57 0 01 001 20kHz 185 0 Snapshot 3 Probe Gps Data Lat 4294402015 Long 12 07 59 551 Date Time 151249 UTC Fig 7 4 Each measurement snapshot log is represented by each line in a table which contains the following information Progressive number from 1 to 1024 Date and time Instantaneous component values for the X Y Z fields Instantaneous isotropic values of the field ISO Maximum isotropic values SPT value WP10 or IB50 index based on the index which was displayed on the screen at the moment of acquisition Frequency span Reference Level Occupational or Population Temperature The details of the probe with which the measurement was taken can be obtained by clicking on spreadsheet field which then opens a window and displays all of the data associated with the particular probe being used GPS Lock Off if the GPS is active and locked on to a satellite during the measurement activity a Lock message appears By clicking on the message displayed the user can view the GPS coordinates and
5. 7 Software Waves ltem Soft Key Function Start and Stop monitoring activity Pressing START commences the acquisition sequence pressing the STOP key blocks the screen at the last acquisition recorded viewed Run Mode RUN STOP rrequency Span KHz Represents the window for choosing frequency 1 20 400 bandwidth The selected span is highlighted in red 3 Ref Level Represents the window for selecting the normative occ POP references regarding operators workers or population the selected reference indicator is highlighted in red This key enables and disables the manual trigger function when inserted it is possible using a mouse to Man set the threshold for the desired trigger by moving changing the reference in the time window Trigger 210 Axis This key enables and disables the ISO and the single 1 SO Y Z measurement axes X Y Z auto When activated this function is performed within the time domain and regulates the vertical zoom for better viewing Log this key switches from linear to logarithmic scale Fautolclog 10 and vice versa within the frequency domain m 10 this key provides the user with the possibility to filter spectral content in the frequency domain eliminating that content which has a value of less than 10 which is indicated below the red threshold line This function is specifically requested by CEI EN 50500 7 INDEXES WP10 198 1850 IRSS IRMS
6. Component replacement and internal adjustments must be made by qualified maintenance personnel Do not replace components with the power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power and discharge circuits before touching them DO NOT substitute parts or modify instrument To avoid the danger of introducing additional hazards do not install substitute parts or perform unauthorized modifications to the instrument Return the instrument to Microrad Service Center for service and repair to ensure that safety features are maintained in operational condition Certification and Warranty NHT 3D 1 Informazioni generli 3 CERTIFICATION AND WARRANTY 3 1 3 2 Microrad certifies that this product met its published specifications at the time of shipment from the factory Warranty This Microrad product is warranted against defects in material and workmanship for a period of 24 months Accessories are warranted for a period of 6 months During the warranty period Microrad will at its option either repair or replace products that prove to be defective For warranty service or repair this product must be returned to Microrad User shall prepay shipping charges to Microrad and manufacturer shall pay shipping charges to return the product to User Microrad warrants that its software and firmware designated by Microrad for use with a
7. 00 kHz It is user friendly and very reliable in the measurements it is also able to provide the environment temperature and GPS coordinates of measuring site to draw up a final report at the best Operating modes 1 3 1 Single EMF measurements Main application of NHT 3D is to execute single selective or wideband EMF measurements The system can manage several probes in order to take a measure of the physical parameter magnetic induction magnetic field and electric field and frequency band needed In a single screen on LCD display are always displayed Instantaneous isotropic value ISO of measured field level Battery charging level Frequency Span Occupational or Population environment Measurement unit GPS on off Temperature Date and time clock The instrument can be used in a standard mode directly operating through its frontal keyboard The acquisition of single measurement values is always done by user command STORE SINGLE Every single value is stored in a specific memory partition reserved for single measurements total 1024 values in conjunction with general information about date and time clock GPS coordinates and temperature NHT 3D 1 Informazioni generli 1 3 2 NHT 3D remote control using Waves software This operation mode is suggested to avoid as much as possible the user presence influencing the measurement environment mainly for electric fields analysis or if it is requ
8. 27 7 6 NHT PARAMETER CONFIGURATION AND 5 85 11 28 7 7 DOWNLOADING DATA FROM THE 3D DOWNLOAD eene 28 V COHngDSDOLlS SOC OTN i td mto tise 26 Ale SeGUDIEAMOERETS ZOOmrand Palast outdated atus 30 7 8 EXPORTING DATA IN TABULAR FORMAT EXPORT 31 739 GPSAND GOOGLE MAPS aoa cua e a 33 7 10UPDATING THE NHT FIRMWARE FW nnn nnns 34 1 1 1 1 2 1 3 GENERAL INFORMATIONS Applications The human exposure to electromagnetic fields not ionizing radiation is nowadays a very critical subject almost all countries in the world are dealing with Technical and normative bodies worked alongside government institutions to enact new guidelines and decrees about maximum permitted exposure levels for populations and workers The measurement equipment for this kind of analysis must suit the technical requirements from the guidelines and must provide the user with qualified physical parameters for comparing with law thresholds About the instrument NHT 3D is the new Microrad solution for the measurement and analysis of complex signals in the electromagnetic safety applications Besides being handy and compact the instrument operates in Selective mode in the frequency band 4
9. 3668 0 oF ol 0 11860 0 0 3660 oi 0 j o 0 o 3670 0 0 0 0 11862 EE 113 5864826 3671 0 0 0 0 11863 0 0 3672 0 0 0 0 11864 0 0 0 0 3673 0 ol ol 0 11865 0 0 0 0 Fig 7 9 7 9 GPS and Google Maps If the GPS module is activated during outdoor measurement activities and the operators position is determined all of the measured data acquired single or continuous monitoring include the GPS coordinates from which they were measured Not only are the GPS coordinates and the time recorded but the user also has the facility to view using Google Maps the positions from which the measurements were taken This is done by establishing a connection between the PC and the internet and then clicking the Maps button which appears in the window as shown in Fig 7 10 r Monitoring Gps Data Lat Long Date 12 2835 624 24 08 10 UTC 14 49 00 UTC 33 NHT 3D 7 Software Waves This command automatically opens Google Maps in the predefined browser of the system and shows the position from which the measurement was taken on the map Fig 7 11 Measurement site Fig 7 11 7 10 Updating the NHT 3D firmware Fw Update The Waves software is designed to allow eventual updates to the firmware located inside the NHT 3D device after the device has left the factory The file containing the new version of the firmware is recognisable through the extensio
10. 8 2 79384 0 0 09978 2 7956212 7 9 278 0 29934 099824892 8199 0 9978 O 0 09978 1 0027766 8 16 16436 0 09978 0 09978 16 164976 8200 7 7828401 0 0 09978 7 7834796 9 16 634 1 0 0 09978 16 763337 8201 11 744 0 0 09978 11 774463 10 i AREE 10 976254 11 8 68086 0 09976 20186614335 8203 7 9824001 0 09978 0 09978 7 9836472 12 Lens DI DUE S004 71841601 009978 010088 56 7 1876238 13 10 57668 0 19956 0 09978 10 579033 8205 9 2795401 0 09978 0 09978 9 2806129 14 2 4 0 1157696 8206 1297272 0 0 12 37272 15 10 27734 0 998 1 0 10 277824 8207 13 4703 0 09978 0 09978 13 471039 16 9 57888 0 09 5788801 8208 11 07558 0 09978 0 09978 11 076479 17 12 07338 0 98 0 12 073792 8209 7 1841601 0 09978 0 09978 7 1855458 18 20 7 01846002 820 55676 0 008978 5 5885709 19 17 604 0 Ol 17 9604 8211 8 8141 amp 0 0 09978 8 2823411 20 13 86942 70 0 1386942 8212 11 704 70 0 11774064 21 6 4857 0 09978 0 09978 6 4872349 8213 11 07558 0 0 11 07558 Fig 7 8 2 NHT 3D 7 Software Waves FFT Samples n X uT Z uT ISO uT n Y uT Z uT ISO uT 3662 0 0 0 0 11854 139 5669641 0 139 5669641 3663 0 0 0 0 11855 0 0 3664 00 0 0 11856 136 2559212 136 2559212 3665 0 0 0 0 11857 138 7283297 138 7283297 _3666 oO 0 0 11858 E 0 3667 0 0 0 0 11859 124 5916979 124 5916979
11. 9 CERTIFICATION AND WARRANTY lla 7 3 1 WARRANTY ac mccain 7 3 2 LIMITATION OF WARRANTY ica 7 4 nc 8 4 1 KEYBOARD LEGEND cado nei bai ndo Ci na A EE RUN 8 4 2 LEGEND OF CONNECTORS AND 10 o PREPARATION FOR USE inopi Vi ere donde RUN PX ADR UU ER OX EFC EORR GRATANTER 12 S I UNPACKING ic Gneo 12 9 2 ddj d Cyr M 12 5 9 CONNECTING THE PROBE ca 13 POWER SUPPLY i ida qain ven cL RES EV VO end cendi a E v e db XC AIR RE E ERN oa 13 S41 Operating INE ici 14 6 OPERATION airina aa ai 15 SWITCHING ON iaia 15 6 2 MAIN MEASURING SGREEN sanc iaia 17 6 3 RECORDING MEASUREDVALUES i a 18 SINGICVAMESIO NG 19 6 4 DATA TRANSFER AND DISPLAY 19 6 5 SPATIAE MODE agnelli 19 6 6 ALERT 19 6 7 FACTORY RESET ica ala 20 7 WAWVESSOFIWARE lie 21 7 1 DESCRIPTION shi lalla 21 7 2 SOFITWAREINSTALLATION aa 21 7 3 COMMANDS E FUNCTIONS ila 22 7 4 CONFIGURATION 8 nnne enne nnn n nn nna nn auus nna asas ER Rua sERR Ra SER Rua sER Russ sas Rasa s suas nasus 25 7 9 MEASUREMENTS FUNCTIONS
12. LEMO Probes Input connector BARREL JACK Battery charge input GPS ANTENNA GPS Antenna Tab 4 3 Connectors Interfaces on the upper side Fig 4 3 5 PREPARATION FOR USE 5 1 Unpacking As soon as the instrument arrives at destination please carefully check the packages to verify possible damages caused by shipment If any damage is found inform Microrad immediately It is recommended to keep the original packages for a future shipment due to for instance repairing or setting 5 2 Storage After the material contained in the packages has been inspected and it has been verified for damages it shall be stored in its original packing until the time of installation The storage deposit must be well protected and free from humidity Avoid keeping the material in storage for a long time since this may cause some failures during the initial period of utilization If the instrument should be kept in storage for a long time it is advisable to insert hygroscopic substances such as silicon gel salts in the package NHT 3D 5 Preparazione per l uso 5 3 Connecting the probe The probe is equipped with a LEMO Push Pull connector To connect it to the NHT 3D unit push the probe plug straight down into the probe socket until it clicks into place the red mark on the probe plug must point towards the red mark on the unit socket To disconnect the probe slide the sleeve on the probe plug upwards and pull the probe upw
13. NHT 3D Complex Signal Analyzer User Manual MICR RAD Release 2 3 March 2014 Progettazione sviluppo e produzione MICRORAD P zza delle Azalee 13 14 05019 Orvieto TR ITALIA Tel 39 0763393291 Fax 39 0763394423 email info microrad it web www microrad it MICR RAD INDEX 1 5 ea 1 APPLICATIONS deal 1 1 2 ABOUT THE INSTRUMENT ibn 1 1 3 OPERATINGMODES isc 1 LOI EMF THECUSUNCINCN ec E 1 1 3 2 NHT 3D remote control using Waves software ierant rnnt taraen atta 2 1 3 8 Downloading data from NHT to PC using Waves software eres 2 LA MEASUREMENT PROBES RF ua 2 1 5 GPS MODULE AND TEMPERATURE nennen nnne tnnt nins ann narrans 3 1 6 ITEMS INCLUDED BASE enne enne nnn nnn nnn nnnm natnra 3 LZTECHNICALSPECIFICATIONS 5 a 4 LXI NHIESDU nICSDOOIHCOtl IIS suu diviti te ta e tata 4 1 8 STANDARDS COMPLIANCE dE dr Far km ta ovi E YE CR rd Prud 5 2 SAPETYSUMMARY acli 6 2 1 255 6 2 2 CORRECT USE sarai 6
14. ONS 00000 Battery Approx 3 hours backlight off Available as option battery for Operation time longer operation time Aprox gt 24h 22 o o Omma O Humidity Size hxwxd Weight AC charger fiber optic 10mt USB Optical Converter User MEUNI manual Waves software Iso 9001 2008 calibration certificate Note technical specifications are subject to change without any prior notice Note technical specifications are subject to change without any prior notice NHT 3D 1 Informazioni generli 1 8 Standards compliance Electrical equipment for measurement control and laboratory use EMC ESD e EMC requirements radiating emission radiating immunity in radio frequency CEI EN 61326 electrostatic discharge Safety requirements for electrical equipment for measurement control and SICUREZZA laboratory use General requirements CEI EN 61010 Marchio CE Europena Union OK Country of origin ITALY 2 SAFETY SUMMARY 2 1 Foreword 2 2 The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific WARNINGS elsewhere in this manual may impair the protection provided by the equipment Such noncompliance would also violate safety standards of design manufacture and intended use of the instrument Correct use Keep away from live circuits Operators must not remove instrument covers
15. ards to remove it WARNING To remove not turn the probe Slide the sleeve on the probe plug upwards and pull the probe upwards to remove it Probe sleeve Fig 5 1 5 4 Power supply NHT 3D operates with Li lon rechargeable batteries The battery charger provided as standard must be used to recharge the rechargeable batteries During the recharging cycle doesn t switch on and cant be used for measuring The batteries are usually delivered precharged but could need a complete charge before the first use A complete recharging cycle lasts about 3 hours The battery charge status is always showed in upper right corner of the display in every operating mode Fig 5 2 13 NHT 3D 5 Preparazione per l uso Fig 5 2 During the recharging cycle the blue led switches on a am pe PUI SENSOR Fig 5 3 5 4 1 Operating time The operating time of the standard provided batteries fully charged is more than 8 hours without interruption backlighting off It is strictly reccomended to use the standard battery charger provided with the kit using a battery charger different from the one provided may result in damage to both batteries and instrument 6 OPERATION 6 1 Switching on Press POWER ON key Tab 4 1 The instrument starts an autotest cycle and displays some device data Fig 6 1 shows the first screen displayed at power on reporting the identification data of the instrument
16. ately visible as shown in Fig 7 1 software shows the acquired samples in the time domain upper window and continuously executes FFT to display the spectrum of the frequency domain lower window MI Waves 3 i aa cs File Meter Help T 20 8 C GPS Off uT Control Run Mode START STOP Span kHz 1 20 400 f Level Trigger off Man Show Axis iso x 2 Options ption Tauto 10 Fig 7 1 2 7 2 Software Installation WAVES software is compatible with Vista OS Windows XP and Windows 7 and 8 operating systems 32 and 64 bit processors The installation setup file WAVES V3 0 can be downloaded from the MICRORAD website www microrad it within the download software page Once the file has been downloaded and clicked on the programme is automatically installed in the Programmes folder located on the PC s hard disk During this phase the drivers for the optical and USB cards are also installed and provide for the automatic recognition of the adaptor each time it is connected to the PC Tablet At the end of the installation a WAVES icon will automatically be created on the desktop and in the Windows launch menu NHT 3D 7 Software Waves 7 3 Commands e functions Programme functions can be accessed through the menu on the upper toolbar as Shown in the following screenshot F
17. bine 3 axe time samples Fig 7 8 Page 3 FFT data is the result of FFT values calculated by the device based on time samples measured the data is presented in 4 columns each containing 8192 lines for a total of 32 768 FFT values Fig 7 9 31 NHT 3D 7 Software Waves General Data Date 04 12 13 04 34 50 J 2 Gp Of 7 4 TRC 186 J 0 0 J Lo Meter Data ProbeData P N NH 3D 0B SIN M0000 5 A0 HOOT Prd 01 01 10 04 12 13 Cal 01 01 10 04 12 13 Fw v1 0 JMagnetic Field ELF 5Hz 400KHz po Settings RefLev Occupational Nsample 656 Tsampeu 005 Fresol Hz 3 5158 J J Trigger Filter o Cut 2 o Measure ISO Lo WP 0 3535629 0 Rms uT 10 648369 _ o Peak uT 14 87 Fmax Hz 50876 617 Fig 7 7 Time Samples Y uT Z u ISO uT n X uT Y uT uT ISO uT uT 1 15 4659 0 70 15 4659 8193 494717 _ 0 0 19 4571 2 9 1797601 0 09978 0 09978 9 18084466 8194 13 57008 0 0978 0 13 570447 3 289362 0 19956 0 29934 2 9158987 81955 4 4901 0 09978 0 09978 4 4923168 4 0 89802 0 19956 0 199560 9413226 8196 0 0 0 19956 0 19956 5 0 9846 0 0 09978 0 7055512 8197 1 97 0 0 19956 1 5099454 6 2 79384 0 19956 0 2 8009581 819
18. during the current acquisition More guidance on the practical implementation of the weighting determination of the weighted peak exposure for is given in the informative annex Appendix Determination of the weighted peak exposure of ICNIRP PUBLICATION 2010 ICNIRP GUIDELINES FOR LIMITING EXPOSURE TO TIME VARYING ELECTRIC AND MAGNETIC WP FIELDS 1 HZ 100 kHZ WP10 Maxy WP10 x WP10 2y WP10j lt 1 WP10 x yz 6 8 ef Joos 2t o f 198 index calculated as fmax i 1 Hz where E is the RMS field component at frequency i value and L normative reference level at frequency i value It must be taken in account that the selected span affects both maximum frequency value of calculation fmax and the frequency resolution e RMS RMS value ot acquired data i E Min Minimum value among acquired data Ce Fmax Frequency value of dominant spectral content 27 NHT 3D 7 Software Waves 7 6 NHT 3D parameter configuration and settings By clicking on the Set Alarm Thresholds icon the user can access the configuration screen Fig 7 3 and set the threshold level for the acoustic alarm of the NHT 3D device Alarm Threshold Level threshold level for acoustic alarm Alarm Settings Alarm Threshold Level Low Frequency Magnetic Probe bo mT Low Frequency Electric Probe 2000 vim Fig 7 3 The user has the possibility to choose between the e
19. e PC for further analysis and post processing Take Snapshot Allows the user to store each snapshot reading taken by the device in the appropriate storage media Clear Snapshots Erases all the acquisitions from the device s memory Meter Info Contains informazioni regarding the meter and the inserted probe Set Alarm Thresholds Allows the user to set the threshold for acoustic alarms on the NHT 3D 23 NHT 3D 7 Software Waves Sync Clock Syncronises information data and time between the PC and NHT 3D Firmware Update Updates the Firmware of the S measurement device Menu Help Content User Manual About Information regarding the version of software installed 24 NHT 3D 7 Software Waves 7 4 Configuration commands The following commands allow the user to configure the parameters for the measurement and management of the readings acquisitions and export of data and images Control Run Mode RUN STOP Frequency Span kHz Q 1 20 400 Ref Level Q Trigger i Off Man Show Axis Options Q 10 Measure 180 o 9 WP 0 02 Q RMS 0 09uT Peak 0 7uT Fmax 0 0 Hz HOLD Data Battery Fig 7 2 25 NHT 3D
20. ection of the instrument it is suggested to accept the related value only if the unit is installed on a tripod and not if in the operator s hand The shell of the meter is made by magnesium and it could conduct the hand heat and thus influence the showed temperature value 1 6 Items included Base Configuration The basic unit NHT 3D is delivered in the standard configuration including NHT 3D basic unit for measuring storing and display field data Fiber optic cable 10 meters lenght Fiber USB adapter to link fiber optic to PC USB adapter cable Battery charger Waves software and user manual available available on website in the download area www microrad it 2 SO 9001 2008 calibration certifictes In order to proper work the NHT 3D meter must be connected to a measurement probe to be chosen among the available ones NHT 3D 1 Informazioni generli 1 7 Technical specifications 1 7 4 NHT 3D unit specifications PROBE TYPES p Frequency range DC to 400kHz with different E and B H DISPLAY 7 128x64 dots MEASUREMENT FUNCTIONS Space Average 000000002 Space Average SPT Indexes on dispaly fo the meter WP10 e IB50 WP 10 198 B50 IRMS and IRSS STORAGE MODE 65 536 monitoring sequences 1024 snapshots INTERFACES Optical interface Serial full duplex Probe interface and play auto detection LEMO connector Model FALCOM FSA03 quadrifilar helix GENERAL SPECIFICAI
21. er Off Man Show Axis 150 X Y 2 Options Hlog 10 dX 10 0238 ms ISO WP 0 00 78 06uT 200 0uT 5 0 kHz D 5 03 kHz 30 95 dBuT 35 28 uT Fig 7 5 Regarding the exporting of images and graphics operator can access saved image files through a window by clicking on the icon as in Fig 6 30 NHT 3D 7 Software Waves Inverted Original Fig 7 6 The system allows the user to choose the format BMP JPG when saving files Files can also be saved in inverted colour format white background which enables the user to reduce user printing costs 7 8 Exporting data in tabular format Export Data 4 2 This function allows the user to export data generated from continuous monitoring activities from the NHT 3D to the PC using the Waves software programme The user may choose to name and save the file which contains the data from the monitoring activity completed using a xls extension MS Excel compatible The exported file in MS Excel format contains three pages with the following data Page 1 Generic data regarding the meter and the probe being utilised Fig 7 7 Page 2 Displays the time samples acquired or measured during the continuous monitoring activity The data is displayed in 8 columns each of which contains 8192 lines giving a total of 65 536 com
22. eset this value press RESET MAX 8 ALM level or SPT value ALM level or SPT value Pressing the ALARM ON key the threshold value for activating a warning acoustic alarm appears This threshold can be configured through the Waves software Alternated to the alarm level in the same region is also displayed the space average value SPT 9 WP Index Press the INDEX key for seeing one of the available indexes WP10 or IB50 10 SPAN The value of the SPAN can be selected from those available 1 kHz 20 kHz and 400 kHz by pressing SPAN 11 POP Using the SHIFT MODE LEVEL can be passed from the block of limitations applied to employees occ those related to population pop and viceversa 12 X Y Z These values represent the X Y Z field components Fig 6 7 They take the place of the AVG MAX and ALM values after pressing the SELECT INDEX key Fig 6 7 6 3 Recording measured values The user can record the measured values using two different ways Manual storing of the single measured value Automatic storing of a measurement sequence monitoring The instrument reserves two different memory spaces for the two recording modes Available space for single measured value 1024 measurements Available space for monitoring sequence 65 536 measurements NHT 3D 6 Operazioni 6 3 1 Single value storing Each time the user wishes to save preliminary values and to immediately acq
23. ested to install the measuring system in a screened and controlled space anechoic chamber for EMC testing In such situation is strongly suggested a wooden tripod with variable height optional NHT 3D can be managed in remoting mode through a fiber optic connection transparent not conductive material to an external PC Waves allows the total remote control of the NHT 3D unit displaying the measured values the indexes and the masks relating to occupational or population regulations Simultaneously it displays the graphic curves Amplitude vs Time and Amplitude vs Frequency upper and lower windows on the screen respectively 1 3 3 Downloading data from NHT 3D to PC using Waves software All measured values recorded both as single store must be downloaded to an external PC through the fiber cable and Waves software to be viewed and analyzed Waves allows to configurate the data of the device such as to set the threshold for an alarm of high field the frequency span the date and time and erase the memory of the individual measurements acquired snapshots 1 4 Measurement probes oeveral measurement probes are available to be used in conjunction with NHT 3D in the frequency range from DC to 400kHz the available probes are 10B for measurements of magnetic induction B frequency range from 5Hz to 400kHz dynamic range from 0 1uT to 1mT gt 11E for measurements of electric field E frequency range from 5Hz a 400kHz range d
24. ht of display SHIFT CONT continuous back light of display SHIFT key Enables all orange defined functions POWER Key ON switches the instrument on SHIFT OFF switches the instrument off GPS Key ON enables the GPS module SHIFT OFF disables the GPS module Blue LED of battery charging in progress BATTERY Led on bright light batteries charging CHARGING Led on weak light battery maintenance charge battery charging level gt 90 Led off Battery charging is complete NHT 3D 4 Legenda dell unit base RESET Key MAX reset of MAX value measured SHIFT SPT resets the value of the space average SPT SELECT Key INDEX sequentially selects the indexes axes WP10 IB50 axes X Y Z SHIFT ALARM Enables and disables acoustic alarm of exceeding exposure threshold TOPT Key ON future additional function Options SHIFT OFF future additional function Options Tab 4 1 Keyboard legend 4 2 Legend of connectors and interfaces The tables below refer to the connectors and interfaces available on the back and at the top of the base unit Fig 4 1 Function Fiber optic cable interface for connection to a OPTICAL SERIAL emote PC NHT 3D 4 Legenda dell unit base Tab 4 2 Connectors Interfaces on the rear part of NHT 3D Fig 4 3 Name Function _
25. i acquisizione da 20V m a 20kV m CW gt 20B for measurements of magnetic induction B frequency range from S5Hz a 20kHz range di acquisizione da 300nT 16mT gt 30B for measurements of magnetic induction B frequency range from 5Hz a 400kHz range di acquisizione da 300nT a 16mT 20H for measurements of magnetic induction B frequency range from OHz a 1000Hz range di acquisizione da 1mT a 15T gt 30H for measurements of magnetic induction B frequency range from 1000Hz range di acquisizione da 200uT 600mT Each probe is automatically recognized by the NHT 3D when inserted Please refer to our website for additional technical details of the Probes www microrad it NHT 3D 1 Informazioni generli 1 5 GPS module and temperature sensor NHT 3D integrates a GPS module to acquire geographic coordinates as reference to performed measurements In case of outdoor activities it is always suggested to add the GPS data related to the measurement site in order to mention them in the final report No other external device is required to perform these operations as the NHT 3D performs the measurement and automatically provides field values together with GPS coordinates of the site The Waves software can directly show it on Google Maps In addition NHT 3D integrates a temperature sensor acquiring the temperature value during measurement execution Since the sensor is installed in the front s
26. ile Open Waveform Save Waveform Load Snapshots Export Data Export Image Exit NU Waves 3 File Meter Help Open Waveform Ctrl 0 Save Waveform Ctrl S Load Snapshots Ctrl L 43 Export Data Ctrl T Export Image Ctrl I Exit Ctrl Alt Q Meter Download Snapshots Take Snapshot Clear Snapshots Meter Info Set Alarm Thresholds Sync Clock Firmware Update laves 3 Meter Help Download Snapshots Ctrl Alt D icy Take Snapshot Ctrl Alt T Clear Snapshots N Meter Info Ctrl Alt I m Set Alarm Thresholds Sync Clock Firmware Update Help Contents About Help Contents Ctrl H 9 About X Ctrl A 22 NHT 3D Menu File 1 E Menu Meter 7 Software Waves Open Waveform Opens saved files continuous monitoring and or single snapshot Save Waveform Saves a new continuous monitoring single snapshot file on a memory device HD USB external memorv device etc Load Snapshots Loads data acquired through snapshots from the device meter to the PC Export Data Exports continuously monitored data in tabulated form Export Image Exports continuous monitoring images in Jpeg or Bitmap format Exit Exit from programme Download Snapshots Transfers single snapshhot taken by the device to th
27. is enabled by pressing the ALARM ON key NHT 3D 6 Operazioni Everyway in addition to this function that is user configurable the NHT 3D alerts the user when the measured field exceeds the 95 of the probe range This is accomplished both showing an E character Fig 6 9 and using acoustic signals The E character always appears near the isotropic value moreover if the single components are displayed then the E character also appears near axes surpassing the 95 of range limit Fig 6 9 At last when the field is so strong that absolutely overcomes the 100 probe range then the message OVER RANGE Fig 6 10 appears on the screen in place of the isotropic value the message is always coupled to an acoustic signal Fig 6 10 6 7 Factory reset To perform a factory reset on NHT 3D unit press the RESET key and hold it for 10 seconds This action will erase all measurement data and will restore all NHT 3D parameters to factory default 7 WAVES SOFTWARE 7 1 Description Waves is a PC Tablet based software package which allows the user to interact with the NHT 3D device The device must be switched on and connected to the PC in order to run the software programme When the NHT 3D is switched on and connected to the PC the Waves software programme opens with automatic execution of the programme which will measure the time domain signal upper window and the frequency domain signal lower window are immedi
28. lectric field or the magnetic field The field type is automatically recognised by the device based on the type of probe inserted 7 7 Downloading data from the NHT 3D Download b n Once the NHT 3D device has been connected to the PC via an optical cable and converter which are included with the device the user then clicks on the Download Snapshots icon After this operation the system allows the user to store the measurement data image on the PC as a file Data is saved as a file using the extension sdf and may be loaded using the Load Snapshots command which can be found within the File menu 7 7 1 Snapshots section SnapShots measurements which are acquired on a one by one basis 28 NHT 3D 7 Software Waves Snapshots Nr Time X f 7 Iso Max Spt WP10 50 Span Level T Probe 1 03 12 13 16 08 58 10 9 v m 89 1 45 8 W m 101 v m 246 v m 16 08 54 03 12 13 101 v m 51 0 06 0 01 20kHz Occ 24 6 O 2 03 12 13 16 12 09 5 70 Vim 7 14 v m 5 93 V m 10 9 v m 566 v m 16 10 41 03 12 13 71 7 Vim 52 0 0 0 0 20kHz Occ 23 5 3 03 12 13 16 12 47 7 93 Vim 11 4 W m 5 47 Vim 14 9V m 566 V m 16 10 41 03 12 13 59 1 V m 53 0 0 0 0 20kHz Occ ZIONI 4 03 12 13 16 13 25 5 37 V m 5 73 V m 12 2 v m 15 1 566 v m amp 16 10 41 03 12 13 51 8 V m 54 0 0 0 0 20kHz Occ 21 1 11 9 03 12 13 16 13 55 8 43 Vim 6 28 v m 9 61 V m 14 2 V m
29. n rom and may be transmitted or received via electronic mail or downloaded from the Microrad website www microrad it To carry out an update the following procedure is used Make sure the NHT 3D device is switched off before connecting it to the PC via the optical cable supplied with the kit Press the RESET button key keeping this key pressed contemporarily press the POWER ON key of the system Release POWER ON key but keep the RESET button key pressed until the following message appears on the screen FIRMWARE UPDATE MODE 34 NHT 3D 7 Software Waves Release the RESET button key Waves Software once the device is in Upgrade mode and the waves software has been launched click on the Meter menu and then on Firmware Update A window then opens which allows the user to locate the rom file which has been previously loaded by the user on the PC s hard disk Click on the file and the update procedure should begin automatically At the end of the procedure the Waves software sends a message that the update procedure has been successful The 3D will then reboot automatically 35
30. n instrument will execute its programming instruction when property installed on that instrument Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by User User supplied software or interfacing unauthorized modification or misuse operation outside the environmental specifications for the product or improper site preparation or maintenance 10 11 LEGEND OF BASIC UNIT Keyboard legend The following table refers to Figure 4 1 which shows the numeric and function keys on the front panel of the base unit Some keys have a second function indicated in orange which can be enabled by pushing the middle button in advance SHIFT 12 14 15 NHT 3D 4 Legenda dell unit base Fig 4 1 Item Device Key GPS antenna 2 Probe connector Battery charger input FI Display and Backlight Temperature sensor MODE Key SPAN sequentially selects the frequency span 1 kHz 20 kHz e 400 kHz SHIFT LEVEL select the application environment by Occupational OCC in Population POP and viceversa STORE Key SINGL pressing this key for storing a single value of measurement snapshot SHIFT REC Not available LIGHT Key TEMP temporary back lig
31. time at which measurement was taken the Map key allows automatic viewing of the coordinates in Google Maps once the PC has been connected to the Internet as explained in paragraph 7 9 29 NHT 3D 7 7 2 7 Software Waves Section Markers Zoom and Pan This section summarises the options available to the user for viewing the graphics output in the time frequency domain Fig 7 from the continuous monitoring activity underway MU Waves 3 Markers the user can use a mouse to place two markers at the points of interest within the time domain Once positioned the field values of the relative difference both in terms of time horizontal axis and amplitude vertical axis are indicated The value of the field indicated by the marker relates to the first of the active axe highlighted in red in sequential order from left to right ISO X Y Z Zoom e Pan the operator can use the mouse to select and enlarge that area of the time or frequency graph which is of interest The Pan function is activated only after having performed a zoom Once the area of interest has been enlarged the operator can pan across the screen by dragging the mouse holding down the left key of the mouse and moving it up and down or left and right along the two axe i File Meter Help uT 100 0 PER Cnr T 20 8 C GPS Off ry Control Run Mode START STOP Frequency Span kHz 1 20 400 Ref Level occ POP Trigg
32. uire the what is displayed he has to just press the STORE SINGLE key This action stores the instantaneous measurement value together with related display data ISO X Y Z values time date GPS coordinates when active temperature MAX value probe data During this storing the display shows the message as Fig 6 8 it informs about number of stored values vs total available Fig 6 8 6 4 Data transfer and display In order to show the recording data independently from storing modes they must first be transferred to a PC through the fiber optic cable the Fiber USB adapter and the Waves software included in the standard package See chapter 7 Waves software for the detailed procedure 6 5 Spatial Mode It is now possible to save single values pressing STORE SINGLE as described in chapter 6 3 1 and display on the screen a label SPT providing the square average value calculated on all the N single instantaneous values stored Pressing the SHIFT button SHIFT RESET SPT resets the value of the space average The reset of the media takes place automatically at each change of probe This function can be useful in order to quickly get the average of two or more values acquired in different space points 6 6 Alert level The NHT 3D features a function capable to alert the user by means of an acoustic signal meaning that the measured field exceeds a threshold user configurable by using the Waves software this alert function
Download Pdf Manuals
Related Search