EFA-300

EFA-300
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EFA-300

Product catalog summary
Overview: The EFA-300 is a field analyzer designed for measuring magnetic and electric fields in workplace and public environments. It is suitable for professionals in the power industry, municipal utilities, insurance, and health and safety sectors. The device supports isotropic measurement and offers innovative techniques for signal-shape-independent field measurements.
Key Features:
  • Frequency Range: 5 Hz to 32 kHz
  • Shaped Time Domain (STD) for signal-shape-independent measurements
  • Fast Fourier Transform (FFT) Spectral Analysis
  • Peak Value Measurement with Proper Phase
  • Large-Capacity Data Storage and Remote Control
Applications: The EFA-300 is ideal for measuring complex, non-sinusoidal signals common in industrial applications like resistance welding. It provides field analysis using FFT computation and displays results as a "Percent of Standard."
Basic Operation: The device includes built-in isotropic magnetic field probes and optional external probes for various applications. It features a cubic-shaped, isotropic E-field module that can operate independently, reducing human body influence on measurements.
Operating Modes: The EFA-300 simplifies measurement processes by including RMS and peak value measurements and the innovative STD mode. It automatically accounts for frequency variations and normalizes field strength results.
Field Strength Mode: The device supports selective and broadband field strength measurements, suitable for environments near high-voltage lines and transformer stations. It offers band pass and band reject filters for precise analysis.
STD Evaluation Mode: This mode simplifies the evaluation of exposure by incorporating frequency dependency of standards and allowing for real-time measurement over the entire frequency range.
Spectrum FFT Mode (Optional): This mode allows for quick evaluation of multi-frequency signals up to 32 kHz, using FFT to convert time-domain signals into frequency-domain data.
Harmonic Analysis Mode: Included with the Spectrum FFT Mode, this feature evaluates the harmonic spectrum and is useful for power quality verification.
Remote and Data Analysis Software (EFA-TS): This optional software provides remote control, data readout, and analysis, supporting measurement report preparation with graphical data representation.
Specifications:
  • Magnetic Field Probes: 100 cm², internal, and 3 cm probes
  • Electric Field: Plate Electrode
  • Measurement Range: 100 nT to 32 mT for magnetic fields, 10 V/m to 100 kV/m for electric fields
  • Noise Level and Uncertainty: Detailed specifications provided for various frequency ranges
General Specifications:
  • Display: LCD Dot Matrix with Backlight
  • Operating Temperature: 0°C to +50°C
  • Battery: NiMH, exchangeable
  • Dimensions and Weight: 110 x 200 x 60 mm, 1000 g
Ordering Information: The document provides detailed ordering information for the EFA-300 Electric and Magnetic Field Analyzer. The basic unit includes the EFA-300 system, calibrated for 5 Hz-32 kHz, with modes for field strength, exposure standard, and harmonic analysis. It comes with a hard case, an O/E converter, a fiber optic duplex cable, software tools, a power supply, and an operating manual available in English or German.
Probes and Sets: The EFA-300 can be ordered with an electric field probe, which is also calibrated for 5 Hz-32 kHz, and includes a power supply, a longer fiber optic cable, and a non-conductive tripod. There are options for sets that include the EFA-300 with the electric field probe and an FFT option for 32 kHz.
Options and Optional Probes: FFT options are available for different frequency ranges, requiring the serial number of the EFA-200 or EFA-300 and the probe. Optional probes for B-field measurements are also listed.
Software and Accessories: Remote and data analysis software (EFA-TS) is available, along with various accessories such as probe extension cables, tripods, and USB adapters.
Contact Information: Contact details for Narda Safety Test Solutions are provided for Germany, the USA, and Italy, including phone numbers, fax numbers, and email addresses.
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Catalog excerpts

EFA-300-1

For Isotropic Measurement of Magnetic and Electric Fields Evaluation of Field Exposure compared to Major Standards and Guidance (selectable) Shaped Time Domain (STD) – an innovative technique for signal-shape-independent field measurements Fast Fourier Transform (FFT) Spectral Analysis Peak Value Measurement with Proper Phase Large-Capacity Data Storage Remote Control Frequency Range 5 Hz to 32 kHz Subject to change without notice

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EFA-300-2

APPLICATIONS The EFA-300 is the ideal field analyzer for measuring magnetic and electric fields in the workplace and in public spaces. The unit is designed for professional users in the power industry, at municipal utilities, by insurers, and for health and safety professionals in industry. In the low frequency range, they handle any measurement, simply and precisely. This instrument provides field analysis using an FFT computation in addition to measuring magnetic and electric fields. The innovative STD mode opens up further application areas. With this new mode the measurement results for magnetic...

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EFA-300-3

/ Safety Test Solutions Various standards and guidance take into account the fact that signal shape plays a major role in determining the workplace limit. For example, in Germany the employer's liability insurance association guideline on "Electromagnetic Fields" specifies different evaluation guidelines for different field shapes. Stationary sinusoidal and pulsed fields are differentiated. Occasionally both the RMS value and the peak value, (with proper phase) are critical for assessing exposure in the low- frequency range. The aim of this new generation of equipment is to greatly simplify the...

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EFA-300-4

In broadband mode, the large, backlit display provides measurement and frequency results simultaneously. Two plug-in B-field probes extend the range of possibilities. The small "sniffer" probe has a 3 cm diameter while the larger, more sensitive probe, has a 100 cm2 cross-sectional area. Users can choose between RMS and peak value measurement from less than 1 nT to 31.6 mT. The EFA-300 can also measure the E-field from less than 1 V/m to 100 kV/m. STD (Shaped Time Domain) EVALUATION MODE Innovative Technique for Signal-Shape-Independent Field Measurements In many situations, detailed knowledge...

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EFA-300-5

Safety Test Solutions Spectrum analysis considerably simplifies the process of quickly evaluating multi-frequency signals up to 32 kHz. All spectral components are evaluated at once. To provide a spectrum, the signal curve versus time is recorded via the probe and converted into the frequency domain using a mathematical procedure known as "Fast Fourier Transform". The EFA-300 is so powerful that even transient events ranging up to 2 kHz can be analyzed in real time. Evaluation is supported by graphics to clearly show the frequency spectrum and by cursor functions with frequency and level indications....

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EFA-300-6

REMOTE AND DATA ANALYSIS SOFTWARE EFA-TS This optional software is used to: • • • • Provide remote control of the field analyzer and data readout Download the data stored in the device Save acquired data on the computer Analyze the data and provide a graphic representation of the results to support the user in the preparation of measurement reports Features • Windows interface to configure the instrument and/or to control it remotely. • Graphic representation of data stored in the internal memory of the instrument or in a file: o Line diagrams show field strength or Percent of Standard versus...

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EFA-300-7

SPECIFICATIONS EFA-300 Magnetic (B-) Field 100 cm² Probe Sensor System Measurement Axis, selectable FIELD STRENGTH MODE Broadband (+0/-3 dB), selectable Frequency Range Band Pass / Band Reject Filter, adjustable Noise level (RSM), typical Coil (internal or external) Tri- Axial (Isotropic) or Single Axis Plate Electrode Damage Level (Peak) Damage Level (Peak) Electric (E-) Field 3 cm Probe RMS (averaging time 1 sec.) Peak Value (proper phase) Detection, selectable Measurement Range Internal Probe Damage Level (Peak) For magnetic field probes depending on frequency Broadband, 30 Hz to 2 kHz Broadband,...

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EFA-300-8

Magnetic (B-) Field 100 cm² Probe EXPOSURE STD MODE Frequency Range (+0/-3 dB) Exposure Evaluation Measurement Range / Overload Limit 200% d Noise Level, typical <0.4% (for ICNIRP Occupational) b Uncertainty, typical (percent of reading) ±4% SPECTRUM FFT / HARMONICS MODE (Optional) Frequency Range Fundamental Range (HARMONICS only) Resolution by 2 kHz Range Marker: 32 kHz Range Frequency 2 kHz Range Scale, 32 kHz Range selectable: Detection, selectable Internal Probe Electric (E-) Field 3 cm Probe 5Hz to 32 kHz c Compared to Standards Stored in Meter 200% 200% 5 Hz to 2kHz 40 Hz to 32 kHz 10...

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EFA-300-9

GENERAL SPECIFICATIONS Display Alarm, Adjustable Threshold Current Documentation (Specific Modes Only) Interface (Remote Control, Data Memory) Operating Temperature Range Humidity Operating Continuous Interval, typical Measurement Programmed Sequence Time Calibration Interval, recommended Battery LCD Dot Matrix 128x64 Pixel with Backlight Via B-Field Unit Acoustical, Optical Via B-Field Unit Input of Prevailing and Reference Current Value; N/A Storage with Measurement Value of Field Optical, Serial (RS-232) 0°C to +50°C <95 % or <29 g/m³ Occasional Brief Condensation Tolerable 10 Hours 24 Hours...

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EFA-300-10

ORDERING INFORMATION EFA-300 Electric and Magnetic Field Analyzer Part number - Basic Unit (EFA-300, EM Field Analyzer System, 5 Hz-32kHz), Calibrated - Mode: FIELD STRENGTH, EXPOSURE STD, HARMONIC ANALYSIS - Hard case for EFA-300 - O/E Converter ORSD-9 Universal - Cable, Fiber Optic Duplex (1000µm), 2m - Software, EFA-200/-300 Tools - Power Supply 9VDC, 100V-240VAC, all Plugs - Operating Manual EFA-200/-300, English or German Probe, Electric Field for EFA-300 - E-Field-Probe 5 Hz-32 kHz for EFA-300, Calibrated - Power Supply 9VDC, 100V-240VAC, all Plugs - Cable, Fiber Optic Duplex (1000µm),...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.