ETS-Lindgren HI-3603 VLF Survey Meter User Manual
Page 13
HI-3603 VDT/VLF Survey Meter
© ETS-Lindgren, August, 2005
Revision E, Part #H-600042
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Figure 2: Typical Frequency Response
Figure 2 demonstrates a typical frequency response plot for both
electric and magnetic fields for the HI-3603. Note that the
bandpass of the HI-3603 is designed to limit response to fields
generated by 60 Hz sources and other emissions below
approximately 5 kHz. In a similar fashion, high frequency
response is controlled to minimize detection of fields above
approximately 300 kHz.
The frequency response data plotted in Figure 2 were obtained
with applied field strengths of 143 V/m and 166 mA/m for
electrical and magnetic fields respectively with the HI-3603 in its
auto-range measurement mode. The bandwidth of the true RMS
detector is a function of the amplitude of the applied field. The
bandwidth of the HI-3603 is also related to the particular
measurement range selected. Thus, for a specific measurement,
the bandwidth exhibited may be greater or lessor than shown in
Figure 2. Generally maximum bandwidth, and thus accuracy, is
obtained for any given field strength by selecting the lowest
range that still permits an on-scale reading. Using the auto-range