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waveform or frequency is no longer needed. The results are reliable, and speed and ease of use are significantly better than all traditional methods.

Exposure Level Tester ELT-400 (1 Hz-400 kHz) - 7092 BASIC OPERATION

The ELT-400 covers the wide frequency range of 1 Hz to 400 kHz. The measurement range of the ELT-400 is far wider than the reference limits of common guidelines. The instrument has an external isotropic magnetic field probe with a 100 cm
2 cross-sectional area. This is suitable for standards-compliant measurement even in non- homogeneous fields. The ELT-400 has a rugged housing and is easy to operate using only six buttons. The measurement result and the instrument settings are clearly displayed on a backlit LCD panel. The optional probe extension cable is specially designed for low influence on the frequency response and sensitivity of the instrument. The cable is a good choice in cases where the probe and instrument must be handled separately. Variants of the ELT-400 are available with different operating mode combinations, e.g. “Exposure STD” or “Field Strength”. Please refer to the Ordering Information section for details.

EXPOSURE STD (SHAPED TIME DOMAIN) MODE

Signal-Shaped-Independent Field Evaluation In EXPOSURE STD mode, the level of the magnetic (B) field is directly displayed as a “Percent of Standard” regardless of the signal shape and frequency. The numeric result clearly reflects the current situation and the remaining safety margin. The method employed can be compared to sound level meters that are commonly used to determine noise in the workplace. The variation with frequency specified in the standard is normalized by means of an appropriate filter. Users no longer need to know the frequency or the frequency-dependent limits. The standard is easily selected by pressing just one button. Multi-frequency signals are just as easy to measure as single frequencies. The newer safety standards and guidelines also specify waveform-specific evaluation procedures. For example, stationary sinusoidal and pulsed fields are differentiated. With the ELT-400 the waveform is automatically taken into account. Users no longer need any knowledge about the waveform or the duty cycle. Measurements on pulsed signals are also possible. Different evaluation patterns are occasionally specified in the standard for certain pulse waveforms. These patterns NSTS 0107-E0205I-0.0

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Subject to change without notice