Acumen all-weather cameras.
All-weather cameras Acumen Depending on natural conditions, the territory of Russia is divided into several climatic zones. In the northernmost parts of the country, the temperature can drop to -55 degrees Celsius, and in the southern regions in the summer there can be extreme heat for months. To ensure security all year round, it is recommended to design a video surveillance system based on all-weather cameras that can continue to function successfully, despite extreme temperature conditions, rain and snow.
Acumen has a wide range of all-weather cameras in its arsenal. The main criterion that distinguishes all-weather cameras is the level of dust and moisture resistance, the IP code. Ingress Protection Rating is a classification system for the degrees of protection of the casing of electrical equipment from the ingress of solid objects and water in accordance with the international standard IEC 60529 (DIN 40050, GOST 14254?96). The degree of protection is understood as a method of protection, verified by standard test methods, which is provided by the casing from access to hazardous parts (hazardous current-carrying and hazardous mechanical parts), ingress of external solid objects and (or) water into the casing. Marking the degree of protection of equipment is carried out using the international protection sign (IP) and two digits, the first of which means protection from the ingress of solid objects, the second — from water ingress. The first digit (from 0 to 6) indicates the degree of protection against penetration of foreign objects and dust into the product:
0 — no protection. Permitted use: in housings.
1 — protection against solid particles of 50 mm or more in size. Permitted use: in closed spaces (access to which is permitted only to authorized and trained persons).
2 — protection against solid particles of 12 mm in size. Permissible use: in normal rooms.
3 — protection against particles of 2.5 mm in size. Permissible use: in normal rooms.
4 — protection against particles of 1 mm in size. Permissible use: in normal rooms.
5 — partial protection against dust. Permissible use: in occasionally dusty rooms.
6 — complete protection against dust. Permissible use: in constantly dusty rooms.
The second digit (from 0 to 8) shows resistance to moisture. The higher the digit, the higher the protection:
0 — no protection. Permissible use: in dry rooms.
1 — against vertically falling drops. Permissible use: in damp rooms with the device in a given vertical position.
2 — against water drops falling at an angle of 15°. Permissible use: in damp rooms.
3 — against obliquely falling splashes, angle of inclination up to 60°. Permissible use: places exposed to rain, but not jets from below.
4 — splash-proof. Permissible use: places exposed to rain and jets (e.g. a station with passing vehicles).
5 — water jets. Permissible use: in places subject to washing with medium-power water jets.
6 — powerful water jets. Permissible use: in places subject to vigorous washing and storms (e.g. on piers).
7 — temporary immersion in water. Permissible use: in places temporarily flooded or permanently covered with snow.
8 — prolonged immersion in water
The higher the level of humidity and dustiness, the more logical it is to use equipment with a higher level of protection. An all-weather camera should have a protection rating starting from IP 64, the Acumen line of all-weather cameras has a protection rating of IP 67. The housing of the Acumen all-weather cameras is distinguished by increased tightness, which makes it possible to exclude from the design a visor, which is often used for additional protection of the camera from rain.
Another important factor is the temperature conditions at which the camera can continue to operate in normal operating mode. The entire line of all-weather Acumen cameras can successfully operate at a temperature of 55 degrees both positive and negative, which has been proven experimentally. In order to confirm the temperature resistance of the Acumen equipment, a series of experiments were conducted. To identify the maximum subzero temperature, the cameras were preliminarily «frozen» with dry ice in the disconnected state. Then they were connected and tested as part of the main test for 2.5 hours with monitoring of all current parameters, including visual assessment of the image.
To determine the maximum positive temperature, the Acumen equipment was tested in a high-temperature thermal chamber (t up to +400°C). During the experiment, the cameras were smoothly heated for 3 hours, starting from room temperature. The figure at which the video signal broadcast was interrupted was +95°C. The result was recorded and they began to slowly reduce the temperature of the thermal camera — the signal transmission was restored at +92°C.
Also, during the experiment, it was revealed that the built-in heater prevents fogging of the objective lenses and ensures stable operation of the camera as part of an outdoor video surveillance system during temperature changes. Acumen equipment, which has withstood the test in extreme conditions, easily solves all the problems when building an outdoor video surveillance system.