Chorus Digital Vision - Technical System Manual
16
The upper side of the front door unit must be about 160-165cm from the
ground.
When using an audio/video module with telecamera, the front door unit must
not be positioned to face strong light sources, or in places where the person is
against the light (for instance, when the person calling has a lamp-post behind
him). A strong background light will, in fact, reduce the brightness and the
contrast of the image because the telecamera adjusts its exposure level to the
brightest areas of the image.
NB: to ensure the person is well-lit in the dark, you are advised to install an
outdoor light source.
If there is no other suitable place for the front door unit, you can try raising it to a height of 180cm from the ground, so the telecamera is
pointing downwards and thereby reduces the back lighting effect.
For further information about the creation of front door units, refer to
Combinations for front door units
.
For the degree of environmental protection (IP) and the operating temperatures of the front door unit modules, refer to
Technical characteristics
.
NB: if the front door unit is to be used mainly or wholly by people in wheelchairs, it may be better to install the position at a lower height.
The upper side of the apartment unit (video entryphone, flush-mounting
entryphone with speakerphone, or wall-mounting entryphone) must be about
160-165cm from the floor.
If the apartment unit is a video entryphone, make sure the screen is not hit by
a direct light (sunlight or lamps) as this would reduce the quality of the image
viewed.
If the apartment is inhabited by a person with mobility problems, it is a good
idea to lower the apartment unit to a height of about 120-125cm from the floor;
the standard height (160-165cm) does not prevent the apartment unit being
used by disabled people, but it does make it more difficult for them.
DESIGN
Positioning the apartment unit
`
165 cm
Positioning the front door unit
`
165 cm
Summary of Contents for Chorus Digital Vision
Page 1: ...Video Entryphone Technical Manual ...
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