JVC VN-V217VPU User Manual

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Thermal Simulation Is Key to JVC CCTV Product Reliabilityby Matt BarrettWith the continuing trend toward lower cost of manufacturing for electronic devices and greateruse of integrated components, we have become used to seeing manufacturer warranty periodswell in excess of the traditional 12 months. This does not necessarily mean that themanufacturer of the device actually expects the product to last as long as the warranty. Itsimply means the manufacturer has made a cost calculation that takes into account the factthat only a percentage of products that fail within the warranty period actually end up being thesubject of a warranty claim. With a relatively low-priced item like a CCTV camera, it is commonto simply purchase a replacement.However, the process of replacing that camera can be very expensive. Warranty or nowarranty, the cost of sending a technician up a ladder to replace a failed CCTV camera oftencosts more than the camera itself. Plus, it is important to consider the potential damage or theftwhere the camera is not providing surveillance.The best way to avoid the expense and inconvenience associated with a CCTV camera thatfails is for the camera not to fail in the first place. But if the warranty period is not a trueindicator of likely product lifespan, how is it possible to determine a realistic picture of expectedreliability?The answer is to examine data such as the FR (Failure Rate) and MTBF (Mean Time BetweenFailures) that a manufacturer may publish. JVC is one of the very few security productsmanufacturers that is proud to publish such data. FR and MTBF figures, established throughwell-established analytical modeling techniques, provide a clear guide for product lifetimeexpectations. JVC’s mini-dome cameras, for example, have a published MTBF figure of 90,000hours. That’s more than 10 years of 24/7 usage. These calculations are borne out in the fieldby users all over the world. For example, a well known national supermarket chain, which hashad more than 7,500 JVC security cameras installed over the past eight years, hasexperienced less than 40 failures. That’s less than one in 200 over a significant timespan.Causes of mechanical failureThe reason for the incredible longevity of JVC products can be traced to a fundamental designphilosophy relating to thermal and environmental issues. To a great extent, the longevity of keycomponents such as integrated circuits and capacitors determines the life span and failure rateof the products in which they are used.Reliability White Paper – Page 1 of 7©2011 JVC Professional Products Company