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AFILS Field Strength Meter Instructions Version 1.3
Connevans AFILS Loop Field Strength Meter
User Instructions
The Connevans 40IFSCE
Audio Frequency Induction Loop
field strength meter is a
calibrated precision
measurement device.
It is designed to meet the
requirements of BS7594.
Two different frequency response characteristics are provided: ʻNORMALʼ which
is a restricted response, similar to that of a hearing aid, and ʻFLATʼ which is a wide,
flat response, similar to that of an equalized induction loop receiver for wide-
band communication. Both filter characteristics meet the requirements of
BS7594.
The meter is calibrated in two ranges; +3dB to -24dB and -24 to -51dB with
respect to the field strength of 0.56A/m recommended by BS7594, allowing
background magnetic noise levels to be measured as well as AFILS signal
strengths. The measured audio signal may be monitored using headphones on
all range and filter combinations.
