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Field Strength Meter

User Guide

IL-CONTACTA-FSM

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Summary of Contents for IL-CONTACTA-FSM

Page 1: ...1 Field Strength Meter User Guide IL CONTACTA FSM ...

Page 2: ...op Systems be installed and certified to the new IEC 60118 4 standard When these standards are met the user experience will be equal wherever they have the opportunity to use their T coils Our design team interviewed many installers throughout the industry which resulted in the following design goals 1 Very accurate and easy to read 2 Simple straightforward operation 3 Based on the IEC 60118 4 spe...

Page 3: ...current mode and the next press advances to the next meter mode 1 Background Noise Test with Max indication 2 Signal Strength A weighted RMS Peak 3 Field Strength Flat RMS Max 4 Third Octave Levels 100 200 500 1K 2 5K 5KHz B Button functions In modes 1 3 pressing the B button reset the MAX or PEAK readings In mode 4 pressing the B button advances the center frequency of the third octave filters Se...

Page 4: ...m will be used holding the meter in a vertical position at the listening plane height The important reading will be the MAX reading However it is important to watch the RMS reading If the MAX reading exceeds 32dBA readings above 32dBA will have a lower negative number for example 30dBA means there is more background noise than 35dBA you will need to document the areas where those higher noise leve...

Page 5: ...vel does not vary by more than 3dBA This lets you know that the perceived signal level in the hearing aids will be the same no matter where the person is sitting Next using program audio similar to what is normally used in the facility adjust the audio program level to a level just above normal Now turn on the hearing loop system and adjust the drive level until a 3dBA to 0dBA PEAK level is obtain...

Page 6: ... 500 Hz 1000 Hz 2500 Hz and 5000 Hz Using the Flat Spectrum mode record the RMS level generated by each of these To meet the IEC specification the levels should not vary by any more than 3dB Method II Pink noise signal Send a pink noise signal into the hearing loop system and select the Third Octave mode on the meter It will initially start at a 1000Hz center frequency Pressing button B will cycle...

Page 7: ...level headphone output type headphone volume display units dB mG uT and power timeout 5 to 30 or none 7 Method II Pink noise signal Cont Record the RMS level readings for each of the frequencies As in method I if the level does not vary by more than 3dB the sys tem as installed will meet the IEC specification This method was requested by the field engineer so they could run the test with one instr...

Page 8: ... last mode on the FSM and displays an accurate level which can then be demonstrated to the building We advise a level between 10dBV and 0dBV To use this feature cycle through the various mode un til you see Line In Flat Response on the display Now connect up the XLR adapter which has an XLR female on one end and an 1 8 TRS connector on the other end If you wish to make up your own adapter use the ...

Page 9: ... 0dB 400mA m 3 0 1dB resolution for levels over 32dB 0 1 dB True RMS on all features Pickup Coil Length wise of meter s longer dimension and Parallel to meter face Position noted on Product Calibrated at 1 000 Hz sine to read 0 dB at 5 03 mG Flat 1dB from 50 Hz to 10 000 Hz Class 2 meter specified in IEC 61672 1 Single 9v Battery External Power Jack Output A Weighted or Flat selectable 16x2 LCD Ch...

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Page 12: ...12 Local dealer UK ROW 44 0 1732 223900 sales contacta co uk US Canada 1 616 392 3400 info contactainc com www contacta co uk ...

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