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The Connevans FSM2 Audio Frequency Induction Loop field strength meter is a digital meter and audio monitor for testing Audio Frequency Induction Loop Systems (AFILS). This meter is a calibrated precision measurement device, designed for both professional and non-professional users and provides a quick and accurate method of monitoring and setting the performance of loop systems.
The FSM2 is the latest generation Field Strength Meter from Connevans. It allows background magnetic noise levels to be measured as well as AFILS signal strength and the measured audio signal may be monitored using headphones. The FSM2 is perfect for checking whether a room is suitable for the installation of a loop system, checking a previously installed loop system and for setting up a new loop system. We recommend the regular testing of all public induction loops and a field strength meter should be purchased with all new induction loop installations.
A suite of free audio test signals is available for free download from https://www.connevans.co.uk/FSM2-loop-test-signals.zip
These may be used on any convenient device such as tablets, mobile phones, music players and laptops.
The FSM2 covers a wide dynamic range of magnetic field strength from -44 to 8dB re 400mA/m in two ranges along with A weighted and flat frequency responses, true RMS and PPM (Peak Programme Meter) display time responses. RMS mode is specified in EN IEC 60118-4, however PPM mode is widely considered to be advantageous for moving signals such as speech and music etc. and is recommended over RMS mode in EN IEC 60118-4, EN 62489-1, IEC TR 63079, all previous publications of BS7594 and is used for broadcast monitoring. The FMS2 offers both.
The audio monitor output matches the display EQ setting, either Flat or A weighted. Low range offers A weighting only, for measuring noise.
The FSM2 is calibrated at
manufacture to meet EN IEC 60118-4. Connevans offer a calibration
service and to maintain accuracy, it should be re-calibrated
annually. A four point calibration at 0dB, 8dB, -18dB and -26dB
is standard at time of manufacture but a full multi-point
calibration option is available.
Key Features:
Includes: FSM2 Loop Field Strength Meter, blue silicone case, carry case, headphones, 2 x AA batteries & instructions.
Specifications
Relevant Standards:
IEC 60118-4 System performance requirements.
EN 62489-1 Methods of measuring and specifying the
performance of system components.
IEC 61672-1 Sound level meters (A weighting & integration
time).
IEC 60268-10 Peak Programme Level Meters.
IEC TR 63079 Code of practice for hearing loop systems.
BS7594 Code of practice for AFILS.
EN 61000-6-3 EMC emissions.
EN 61000-6-1 EMC immunity.
RoHS: 2011/65/EU.
WEEE: 2021/19/EU
Click here to view user
instructions
Download sound files here:
https://www.connevans.co.uk/FSM2-loop-test-signals.zip