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1 Introduction
1.1 About this instrument
1.1.1 Application
Magnetic fields are present in production areas, public places and the
everyday environment. Measurements are often made in these areas to
ensure that people are not exposed to fields that could cause injuries.
Global efforts to provide effective protection have resulted in a range of
national and international guidelines and standards in recent years, which
specify reference limit values for field strengths for various frequency ranges
and signal shapes.
In practice, simple equipment must be used to determine the fields that
occur and to check that the limit values are not exceeded.
The ELT-400 is a completely new type of tester for workplace and public
area exposure to magnetic radiation. It was developed specially for the
above areas, for use by health and safety representatives in industry,
insurers, and service providers.
Production areas
The ELT-400 is particularly suitable for applications involving production
plant, including welding, smelting and heating, as well as most magnetic
stirring equipment. It can handle special requirements such as the pulsed
signals or phase control encountered in resistance welding without
problems.
Everyday environment
Magnetic fields occur everywhere in the everyday environment, being
produced by everything from power supply plant through to medical
equipment.
For example, the electromagnetic and magneto-acoustic security systems
used in department stores also operate within the frequency range of the
ELT-400.
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