Vonnic Standalone DVR Manuel d'utilisateur télécharger pdf (Page 5)

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Camera Specifications continued

The IP Code or International Protection rating classifies the degrees of protection provided

against the intrusion of solid objects, dust, and water in electrical enclosures. The first num-

ber you see in an IP rating indicates the effectiveness against intrusion from foreign objects

and dust. The second number indicates its effectiveness to protect from the ingress of water.

The scale goes from 0-6 for each digit. If you are planning to install outdoor cameras, you

will want to use those with an IP 66 rating. This indicates the camera is weatherproof and is

safe for outdoor installations.

Vandal proof cameras are those that are tamper resistant. They are enclosed in aluminum or

special polymer housings that provide protection in locations such as convenience stores

where the camera could be tampered with or hit with an object.

Mounting options are available if standard mounting does not suit your needs. Many brackets

are available including pole mount, ceiling mount and corner mount brackets. Having these

options increases flexibility when configuring your field of view coverage.

Lenses

A lens is an optical device which transmits and refracts light. When choosing the proper

CCTV camera lens, you must consider the following:

Varifocal or Fixed are the two basic types of lenses. Varifocal lenses are adjustable whereas

fixed lenses are not. Varifocal lenses are more expensive but are ideal in places where the

focal point may change or vary. Fixed lenses typically come as a 3.6mm or 4mm an accom-

modate most scenarios.

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Vonnic Standalone DVR Manuel d'utilisateur Page 5