By setting the NTP server address, NTP port number and time interval, the device will perform time calibration once every set time.

NVR3.0 interface path:

Main menu-System Configuration-Network Configuration -NTP

NVR4.0 interface path:

System Management-Network Configuration-Basic Configuration -—NTP

Note: NTP calibration requires devices to access NTP software in the external network or local area network to form an NTP server.

Safety precautions for system events:

Equipment should be kept clean and dustproof in daily use, and frequent switching is strictly prohibited. For example, don't turn it off immediately after starting, which will easily damage the equipment. Although this matter has been noticed when the system control program was written, it has done some protection functions, so please pay attention when using it.

The mainframe of the central centralized control system and the video processing system can be powered on for a long time. It is suggested that the continuous power-on time of the projector should not exceed 10 hour.

Following the following safety principles will help to ensure your personal safety and avoid potential damage.

Don't try to repair all the devices that make up the system by yourself. Unless you are a maintenance technician trained in the system, please always use and maintain the system in strict accordance with the operation manual.

Please keep all equipment well ventilated, otherwise it may lead to short circuit of internal components of the equipment, which may lead to fire or electric shock, and even lead to the collapse of the whole system.

In order to avoid possible electric shock, please do not connect or disconnect any cables of the system in thunderstorm weather, and do not try to maintain and install the equipment of the system on line.

Most of the equipment in this system has passed strict electromagnetic radiation (EMC) or similar safety verification, and generally will not interfere with other electronic products. However, when the system needs to add electronic equipment, please pay attention to whether the products you choose have been verified by similar tests to avoid interference with the existing system.

When disconnecting all cables, please hold the connectors tightly for plugging and unplugging according to different cable connector modes, and do not use brute force to pull the cables. Before connecting cables, make sure that the two connectors are oriented correctly and aligned.

Do not attempt to restart the system or equipment immediately after it is shut down. The projector must wait for the cooling fan to stop completely before it can be restarted. The cooling time depends on the running state (it is generally recommended not to be less than 30 minutes). It is recommended that the restart interval of other electronic devices should not be less than 3 minutes.

The start-up time of the projector is about 60 seconds (after pressing the Stby key). After 30 seconds, the grating is turned on and the strong light is projected onto the screen. Please don't look directly at the lens during this process, so as not to burn your eyes when the grating is opened.

Keep the electronic system running in a basically clean environment, so that there is no smoke and dust, because smoke and dust do great damage to the projector and all electronic equipment, although the projector has a sealed, dustproof and smoke-proof DMD? Chip.

For other safety instructions or detailed precautions, please refer to the attached product manual.

Refer to the above? Baidu encyclopedia-monitoring