Press Release Summary:
Model EFA-200 and EFA-300 analyze low-frequency magnetic and electrical fields to determine safety or potential for harm from high-voltage utility lines and industrial equipment such as resistance welders. Analyzers use Shaped Time Domain (STD) technology to measure in low frequency range of 5 Hz to 32 kHz. They calculate and display field strength levels as percent of industry or government standard, irrespective of signal frequency and waveform.
Original Press Release:
New Magnetic And Electrical Field Analyzers From Narda STS Measure Accurately Regardless Of Signal Shape & Complexity
MEASURE ACCURATELY REGARDLESS OF SIGNAL SHAPE & COMPLEXITY Major Safety Advance For Utility Workers; Aid to Insurers and Health Officials
HAUPPAUGE, N.Y., Jan. 7, 2002 -In an important step toward assuring the safety of utility workers and private citizens in proximity to power lines and high voltage equipment, Narda Safety Test Solutions has introduced new isotropic analyzers for low-frequency magnetic and electrical fields that produce fast, accurate measurements regardless of signal shape and complexity.
The new Model EFA-200 and EFA-300 Field Analyzers. designed for use in industry, by insurers, and by health and safety professionals, employ Narda's unique, innovative Shaped Time Domain (STD) technology. The complex STD circuitry calculates and displays field strength levels as a percentage of an industry or government standard. irrespective of signal frequency and waveform. allowing for an immediate determination of safety or potential for harm.
"The energy emitted by high-voltage utility lines and industrial equipment such as resistance welders can pose risks to personal safety," said Richard Strickland, Director of Business Development for Narda STS. "Until now, there haven't been instruments that could perform the level of analysis needed to confirm, quickly and conclusively, that a given environment complied with established standards for occupational or public safety. Formerly, accurate analysis also required technicians with detailed knowledge of the fields being measured, the instrumentation being used, and other factors. We've eliminated the complexity of the process and improved the accuracy of the instrumentation."
Both the EFA-200 and EFA-300 measure magnetic field strength, while the EFA-300 includes a cube-shaped module for isotropic measurement of electrical field (E-field) strength. The EFA-300 E-field module can be operated remotely from the base unit, so that field strength can be measured with little or no influence of a human body on the field being measured.
Designed to operate in a low frequency range of 5 Hz to 32 kHz. both models are equipped to perform RMS and peak value measurement. In the case of environments where multiple frequency signals are present. the analyzers can be optionally equipped to perform fast Fourier transform (FFT) spectral analysis. where all components, including harmonics, are evaluated simultaneously.
Both the EFA-200 and EFA-300 have built-in isotropic magnetic field probes, and both can also be used with an optional. large high-sensitivity probe for enhanced performance and measurement of dissimilar magnetic fields. B-field analysis can also be performed in hard to reach places with a miniature, 3 cm "sniffer" probe, also an option.
Depending on the application, the analyzers can be set to operate in broadband mode, covering the entire spectrum from 5 Hz to 32 kHz. For a more detailed field analysis, or in environments with multi-frequency fields, band pass and band reject filters are available in the range of 15 Hz to 2 kHz. User-editable filter lists can also be configured. For convenience, the analyzers are designed to allow fast switching between common filter settings, such as broadband and bandpass.
The backlit LCD display provides graphed and numeric indication of field strength and visual confirmation of operational mode, bandwidth, and other parameters.
Windows-based software allowing remote operation and the downloading and analysis of data stored in the analyzer is also available.