Gigahertz Solutions NFA 400 Operating Manual
3d low frequency analyzer with data logger
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Summary of Contents for Gigahertz Solutions NFA 400
- Page 1 Made in Germany NFA 1000 NFAsoft Analysis and NFA 400 Configuration Software 3D Low Frequency Analyzer with Data Logger Operating Manual Version 7.4...
- Page 2 Please note: The only significant difference between the NFA 1000 and the NFA 400 in this manual is the fact that the NFA 1000 al- lows a three-dimensional potentialfree measurement of the E-field, while the NFA 400 can only be used for one- dimensional potentialfree measurements of the E-field.
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Page 3: Table Of Contents
This manual is based on the firmware version 75 and NFAsoft version 172. The firmware and software of the NFA will be continuously improved and made available via e-mail or download from our homepage. - 1 - © Gigahertz Solutions GmbH May 2017... -
Page 4: Quick Start Guide
By pressing the ‘mode’ but- ton you can easily switch from this to the Z-axis of the AC magnetic field on the display. > - 2 - May 2017 © Gigahertz Solutions GmbH... - Page 5 To allow a simplified freehand measurement, the meter is pre-adjusted with a 16 Hz high pass filter for the magnetic field and a 50 Hz high pass filter for the elec- tric field (see page 23 for measurements from 5 Hz onwards). - 3 - © Gigahertz Solutions GmbH May 2017...
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Page 6: Nfa 1000
Made in Germany 2 Front Cover NFA 1000 and NFA 400 Analogous front cover for NFA 1000 and NFA 400 NFA 1000 AC/DC 3D-NF-Analyser 5 Hz - 1000 kHz Mode Auto Band Freq. „Ey“ NFA 400: Signal Power tRMS TCO-Band... -
Page 7: Leds / Display / Audio Signals
During normal operation, how- ever, “FULL” means the SD memory card is full. „nbAt“: The processor cannot recognize the battery (see the note below) - 5 - © Gigahertz Solutions GmbH May 2017... - Page 8 With “Freq.” the actual mains frequency can be determined exactly. The LED’s for 16.7 Hz, mains frequency and its harmonics up to 2 kHz have a suitable lock-in range to cover mains fluctuations. - 6 - May 2017 © Gigahertz Solutions GmbH...
- Page 9 To make it more ergonomic for the user, frequencies below the nominal display resolution (that is < 0.1 V/m or < 1 nT) are not indicated by an LED-signal but will still be recorded down to the noise level. Hysteresis: 9/12% resp. 45/50%. - 7 - © Gigahertz Solutions GmbH May 2017...
- Page 10 (and finally: off), as long as no grounding cable is connected to the instrument. Please note: For extra-precise measurement requirements turn the acoustic signal volume down or even switch it off completely. - 8 - May 2017 © Gigahertz Solutions GmbH...
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Page 11: Switches / Push-Buttons / Connectors
“XYZ”, whereas the NFA 400 will only show the individual compo- nents of the magnetic field. Press the ‘Mode >’ button to switch from one axis to the other. - Page 12 For E-field measurements against earth potential, please plug in the grounding cable and switch to “M3D” (automatic adjustment) on the NFA 1000 switch to “Ey” on the NFA 400. 4.3 Sockets for Inputs and Grounding AC/DC = Combined AC/DC-Input The moment you connect an external sensor, its signal will automatically be displayed in mV and logged if required.
- Page 13 Socket for the TCO-conformed probe at the front end of the meter This is for the TCO-conformed probe available as an option- al accessory from Gigahertz Solutions. 4.4 Mode = Selection of Meas- urement Mode Selects all measurement and display op-...
- Page 14 Tolerances are much higher than using the tRMS analysis. It cannot be used with the floating potential E-field measurement for the time being. - 12 - May 2017 © Gigahertz Solutions GmbH...
- Page 15 „SDHC“ which is standard for units built 2008 or later. For older units inexpensive adaptors are available. The SD-card reader is included in the scope of supply of the NFA 1000 only. - 13 - © Gigahertz Solutions GmbH May 2017...
- Page 16 “Mode” and “Rec.” keys form part of the many special functions of this device. They are not needed for a simple measurement of the 3D magnetic field. - 14 - May 2017 © Gigahertz Solutions GmbH...
- Page 17 These audio notes will then be di- rectly allocated by NFAsoft to the corresponding recording times in the graphic. Please note that the WAV file needs to be saved in the same folder as the LOG file. - 15 - © Gigahertz Solutions GmbH May 2017...
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Page 18: How To Measure And Data-Log
10 cm off the bed’s edge). The NFA in combination with NFAsoft allows for a “guided measurement” in order to efficiently ac- complish data collection and evaluation. - 16 - May 2017 © Gigahertz Solutions GmbH... - Page 19 “hit“ the measurement point, if you use a holder then withdraw quickly to a minimum distance of 1.5 m and keep still there in order to avoid movement- induced "pseudo-fields”. - 17 - © Gigahertz Solutions GmbH May 2017...
- Page 20 E-field if the field selection switch is set to M3D and the AC/DC socket is not connected. However, if an HF analyzer is connected to the AC/DC socket, it will automatically rec- ord the output of this external device. - 18 - May 2017 © Gigahertz Solutions GmbH...
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Page 21: Power Supply
250-500 complete charge cycles. In this case please always replace both batteries. Please see chapter 9 for information on the initialization of the capacity display. - 19 - © Gigahertz Solutions GmbH May 2017... - Page 22 Disconnect the adapter from the NFA without changing its position and ori- entation; wait for the display to stabilize. Evaluating the logged data on the PC will potentially show difference that can be corrected, if necessary. - 20 - May 2017 © Gigahertz Solutions GmbH...
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Page 23: Nfasoft
(the consecutive numbering is independent from the file type) LOG00001.TXT log file (long time recording) LOG00002.9PM 9-Point-Measurement (sleeping area) LOG00003.6PM 6-Point-Measurement (workplace) REC00004.WAV audio file (recorded note). - 21 - © Gigahertz Solutions GmbH May 2017... - Page 24 (= bold) channel. It will be bold for the one and regular for the other, equalling the markings in the “Channels” window. - 22 - May 2017 © Gigahertz Solutions GmbH...
- Page 25 When you click Ok, the comment will be embedded into the data, marking an event or section of interest. . - 23 - © Gigahertz Solutions GmbH May 2017...
- Page 26 All other edit options are self explanatory. The 95th percentile is calculated heuristically. If the possible deviation exceeds 10%, it will be noted in parenthesis after the figure in absolute terms. - 24 - May 2017 © Gigahertz Solutions GmbH...
- Page 27 “Edge Display” of the plot. This threshold can be selected individually for every channel. Standard values have been pre-selected as defaults. - 25 - © Gigahertz Solutions GmbH May 2017...
- Page 28 HF-Analyser settings during the recording period. nT <> mG This function allows to subsequently convert a chosen channel’s data from milliGauss to nanoTesla and vice versa. - 26 - May 2017 © Gigahertz Solutions GmbH...
- Page 29 “Edit” in the menu offers you the possibility to copy the illustrations into your report, also individually. The evaluation of the 6-Point-Measurement is done analo- gous to the 9-Point-Measurement. - 27 - © Gigahertz Solutions GmbH May 2017...
- Page 30 “save as pre-setting for NFA- soft”. All pre-settings are stored in the file “NFAsoft.ini” and are available for NFAsoft provided that this file is in the same folder. - 28 - May 2017 © Gigahertz Solutions GmbH...
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Page 31: Firmware-Update
Please differentiate: With „NFAsoft“ the firmware can be configured and the user settings stored in the file „CONFIG.NFA“. This has nothing to do with the firm- ware itself. - 29 - © Gigahertz Solutions GmbH May 2017... - Page 32 Do not switch the meter off during the update process! Please remember to unlock the SD-card after applying the new firmware! Recalibration of the battery capacity display (please see next page: Chapter 9) - 30 - May 2017 © Gigahertz Solutions GmbH...
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Page 33: What If
There is no recording (status LED does not turn green) Insert or unlock SD-card! (Push micro switch on the left of the card upwards) - 31 - © Gigahertz Solutions GmbH May 2017... - Page 34 “All3D”. For example, if you take 500 nT at 16.7 Hz plus 1000 nT at 50 Hz, a simple addition will amount to 1500 nT, whereas the quadratical addition (= “All3D”) will amount to only 1118 nT. - 32 - May 2017 © Gigahertz Solutions GmbH...
- Page 35 Therefore you cannot use NFA- soft to check the configuration of the NFA, but only to instal new configurations. You can save frequently used configu- rations as presets to a dropdown menu in NFAsoft. - 33 - © Gigahertz Solutions GmbH May 2017...
- Page 36 “normal” measurement This is nearly always a matter of “pseudo fields” caused by movements or electrostatics in the area of the meter (for instance by the person moving away from the - 34 - May 2017 © Gigahertz Solutions GmbH...
- Page 37 There are very many small TXT-files on the SD-card? Solution 1: You have activated the function “permanent logging”, which causes the meter to log not only when switched to “Log”. This option will cause a new file to - 35 - © Gigahertz Solutions GmbH May 2017...
- Page 38 NFAsoft. The audio files (.wav) will only be displayed in the dia- gram if they are stored in the same folder as the LOG- file and if they are not renamed - 36 - May 2017 © Gigahertz Solutions GmbH...
- Page 39 Made in Germany...
- Page 40 Made in Germany Hersteller / Manufacturer Gigahertz Solutions GmbH Am Galgenberg 12 90579 Langenzenn Germany Tel : +49 (9101) 9093-0 Fax : +49 (9101) 9093-23 www.gigahertz-solutions.de / www.gigahertz-solutions.com Ihr Partner vor Ort / Your local partner...