DVR use and maintenance should pay attention to what matters is? 1. Please ensure the DVR away from heat and place the heat. 2. Please keep the DVR ventilated enclosure around for heat dissipation. 3, the dust on the circuit board in the damp easily cause a short circuit, affecting the normal operation of DVR and even damage the hard disk recorders, DVR in order to make long-term stability, regularly used for circuit boards, connectors, chassis fans, chassis, dust, etc. . 4. Please ensure CCTV project has a good grounding measures to avoid video and audio signal interference, while avoiding DVR by electrostatic or induced voltage damage. 5, audio and video signal lines and RS-232, RS-485 interfaces, Do not hot swap, or likely damage to these ports. 6. Do not use the TV monitoring system installed on the local hard disk video recorder output (VOUT) interface, or easily damaged DVR video output circuit. 7, DVR surveillance system installed off the supermarket, do not turn off the power switch, you should try to use the menu to shutdown, or off button on the front panel (often by more than three seconds), so the DVR to automatically turn off the power, to avoid damage to the hard disk. Monitor viewing area that is often overlooked is a problem, also known as the actual display size to install monitoring systems company, in size LCD monitor is calculated, such as 21-inch LCD monitor, 21 inch finger is the product casing diagonal size of 21 inches, while the actual display size we need to remove the frame to calculate plant installation monitoring system, which is the measurement of the inside of the diagonal length of the border, under normal circumstances outside dimensions of all manufacturers are fully guarantee or exceeded. However, the actual display size is part of this monitor for customer service. Tiger's actual display size 21-inch LED LCD monitor can be reached 20.89 inches, 22 inches and general visual dimensions similar. Belong to the same type of product in the greatest. Installation of surveillance systems company | Xinzheng install monitoring systems | Source maintenance provided by Zhengzhou source maintenance Electronic Technology Co., Zhengzhou source maintenance Electronic Technology Co., Ltd. (www.hnxywb.com) strong, credible, in Zhengzhou integrated monitoring systems and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead source maintenance and you work into the brilliant, for a better future!