An ideal, point light source radiates its luminous flux evenly in all directions in the room, with its light intensity being equal in all directions. In practice, however, there is always an uneven spatial distribution of luminous flux, partly due to the lamp design and partly due to the manner in which the luminaire is formed. […]
HID prox cards are simply proximity cards branded by the HID global corporation, a worldwide leader in proximity cards and access control. Like other proximity and RFID cards, an HID card is simply an ID card which enables proximity technology in its everyday functions. HID cards, as well as other types of RFID cards and smart cards,
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The NEC requires that access and working space be provided and maintained around all electrical equipment to permit ready and safe access to and maintenance of the equipment. Depth of Electrical room The NEC provides minimum depths in two tables that list nominal voltages to ground. Table 10.26(A)(1) includes depths for voltages to ground up
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The function of a lightning protection system is to protect structures from fire or mechanical destruction and persons in the buildings from injury or even death. Components of a lightning protection system : Air-termination systems Down conductors systems Earth-termination systems separation distances Lighining equipotential system A lightning protection system consists of an external and an
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A camera with WDR wide dynamic range is able to operate in variable light conditions, especially in high contrast situations. When shooting in high contrast, backlight, glare and light reflection environments such as the entrance, ATM or the window side, the object will appear dark and unrecognizable. WDR (Wide Dynamic Range) technology can ensure an
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Video manager software mainly includes web-based software and central management software. Webbased software is built in the camera, allowing users to perform basic functions such as recording, monitoring and configurations. Relatively, central management software offers more powerful functions such as playback, remote monitoring in multiple monitors etc., to achieve efficient, flexible video management. Monitoring Users
An NVR (Network Video Recorder) is an IP-based recorder that operates independently from a PC or other operation systems. Aimed to store digital video streams from network cameras, an NVR is usually incorporated with a large-volume hard disk to allow for a long period of recording. An NVR differs from a traditional DVR in its
As CCTV is part of a multi-layered security approach, a CCTV system design should begin with a comprehensive needs assessment to ensure security risks and mitigation plans are identified. Clear requirements, a comprehensive site survey, and proper equipment selection and installation must all be considered when designing a CCTV system. Identifying Customers Needs Before deploying
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in order to achieve efficient video transmission, it is important to evaluate your bandwidth requirements before setting up an IP surveillance system using cctv storage calculator. Bandwidth requirements in cctv storage calculator vary with the following factors : Storage Besides bandwidth assessment, your storage space is also required to be evaluated, especially with megapixel images.
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Turnstile provide the ability to restrict passage to a single person at a time unlike a door that, once open, many individuals can pass through. Turnstiles and portals manage pedestrian traffic flow and access at checkpoints. Turnstile technologies range from a simple, stand-alone rotating tripod with no accounting functions to electrically activated barriers with optical
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