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User Guide

Univox® FSM Basic

AFILS Field Strength Meter

Part no 401014

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Содержание FSM Basic

Страница 1: ...User Guide Univox FSM Basic AFILS Field Strength Meter Part no 401014 ...

Страница 2: ...d assessment of background noise field strength and frequency response of the system to comply with the requirements of IEC 60118 4 Two different frequency response characteristics are provided NORMAL which is a restricted response similar to that of a hearing aid and FLAT which is a wide flat response similar to that of an equalized induction loop receiver for wide band communication The meter is...

Страница 3: ...read when held at the hearing position This meter is designed with high quality components for low noise and operates over a very wide range of 54dB in two stages The range in use is indicated by an LED as is a low battery condition warning Two measurement filter tone responses are provided The FLAT setting is provided only for measuring system frequency response in conjunction with an external si...

Страница 4: ...ackground noise levels within the listening area NOTE For long time listening the IEC 60118 4 recommended background noise level should be below 47dB If the background noise level exceeds 32dB the nature of the magnetic noise should be assessed and remedial measures to achieve lower background noise level should be considered For short time announcements background noise levels of up to 22dB can b...

Страница 5: ...3 Set the TONE filter switch to the FLAT position 6 4 The RANGE switch should be set to HI position 7 5 Hold the meter in a vertical position with the top at the listening height and measure the frequency response for 100kHz 1kHz and 5kHz The frequency response for 100Hz to 5kHz should be within the range 3dB with reference to the response at 1kHz If the deviation is larger try to adjust the frequ...

Страница 6: ...d the loop perimeter 6 Confirm that the field strength level does not vary more than 3dB within the listening area System commissioning 1 Connect the actual signal source s preferably speech and adjust the input level according the loop driver s manual if the primary sound source is unavailable haspeech wav or itu wav audio files can be used 2 Set the TONE filter switch to the NORM position 8 3 Se...

Страница 7: ... instrument should be recalibrated annually Have the calibration rechecked if the instrument is dropped or otherwise damaged Batteries Press and slide battery cover to remove Orientate the battery as shown in the battery compartment molding No harm will occur if the battery is reversed but the instrument will not work Rechargeable batteries are not recommended for infrequently used equipment due t...

Страница 8: ...d 24dB to 3dB with respect to 0 40A m Indicator style BBC EBU Peak Program Meter 3ms attack 650ms decay Resolution 3dB Absolute accuracy 0 5dB 0dB 400mA m and 27dB 18mA m reducing to 1 5dB 24dB 25mA m and 48dB 1 6mA m Filter characteristics NORM 3dB 630Hz 5kHz FLAT 3dB 40Hz 14Hz Headphone monitor Max 2x19mW into 32ohms Relevant standards EN 60118 4 Environment Please follow existing disposal regul...

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