Honeywell X-618 Commissioning Manual page 24

amplifier from DCS, and back to DCS after amplifying, the audio can't be played due to the loop or
device fault. Check box which shown as
use of amplifier is two channels or four channels, channel number in odd, such as No. 1, 3, 5,etc
should be enabled during the device fault setting. Channel number in even can't be selected,
otherwise the supervision will be incorrect.
6． AVC
The AVC Setting function allows users to set the parameters for the AVC, as shown below:

AVC Input
Select the AVC input channel, which should be matched with that in supervision module, and
check the box to enable the AVC function of the selected channel. If channel is not equipped with
noise detector, it can't be selected.
"Calculation" describes when there are many noise detectors in one line, the device can
automatically volume control (AVC) according to average or maximum value.

AVC Parameter Setting
 "Sampling Period" is the supervision cycle of ambient noise. Its setting range is related to
the No. of connected modules of device.
 "Sensor Deviation" means the deviation between the actual sound pressure level and the
one measured by noise detector. Actual sound pressure can be measured by the sound
pressure meter. Constant audio signal, such as white noise and sine wave can be played
during the commissioning. Then the deviation can be got through measuring by the
device and sound pressure meter. Any interference is forbidden during the measurement.
 "Reaction Level" with the unit of dB is the bound value to enable the AVC function. When
the sound pressure is equal or greater than this value, AVC function is enabled to adjust
output volume automatically. When it is less than the bound value, the output volume is
the minimum value.
 "Level deviation (min)" is used to set the minimum volume of the adjusting range.
 "Level deviation (max)" is used to set the maximum volume can be adjusted through the
AVC.
 "Factor" provides the function to set the volume adjusting ratio, same kind of sound
change, the bigger the adjusted ratio, the bigger the volume change.
means enable, and means disable. If the actual
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