Separate mounting of microphone – 2N Lift8 v1.0 User Manual
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For mounting one needs (from the inner side of the panel) 4 electrically welded
(spotted)
or
screws and a sufficiently perforated surface for the speaker and
M3
M4
opening for microphone. As an emergency measure one can also install the announcer
with high-quality double-sided foam adhesive tape on a perfectly degreased surface.
Separate mounting of microphone
If the microphone is supplied separately on a 25×25mm board with self-adhesive film
and equipped with a cable, it is possible to mount it behind any hole in a board
(minimum diameter of hole is 5mm, or group of smaller holes with same overall area.
The microphone is stuck (from the back) directly in the required place (the surface
must be cleaned of dust and grease beforehand!).
Requirements :
The minimum distance between the centre of the speaker and
microphone is
90 mm. There could be feedback if the distance is shorter. But a
greater distance (within the range of the supplied 1m cable) does no harm.
The microphone must be stuck on so that it does not pick up (even in part!) the
acoustic pressure from the space behind the control panel. There would occur
acoustic feedback with the speaker, which sends out sound strongly into this
space.
Separate mounting of speaker
The speaker has a cable which can be separated from the electronics (simply pulled
out) in the range of the supplied wires (1m). This possibility is intended for cases
where it is necessary to install a speaker in a place where there is no space for all the
electronics. Adhere to the following instructions when fixing the speaker:
if you stick the speaker on, ensure such a procedure or type of glue so that the
membrane is not damaged by the glue and volatile substances or heat.
we recommend that the sealing be left on the speaker, it prevents vibration and
serves as electrical insulation.
Safety
There must be no gap between the lift control panel and the surface of
the announcer so that there is no acoustic shorting of the speaker and
acoustic feedback between the speaker and microphone.
It is not permitted to use this type of announcer other than when
mounted on a sufficiently large board. It is not possible to guarantee the
acoustic properties of an uninstalled announcer.