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Alhua - Dahua DVR Manual

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Earthing 314
For L (live cable)
Turn the digital multimeter to 750V AC, use your one hand to hold the metal end, and then the
other hand insert the pen to the L port of the socket. See the following figure. If the multimeter
shows 125, then you can see current live cable connection is standard. If the value is less than
60, then you can know current live cable connection is not proper or it is not the live cable at all.
For N (Neutral cable)
Turn the digital multimeter to 750V AC, use your one hand to hold the metal end, and then the
other hand insert the pen to the N port of the socket. See the following figure. If the multimeter
shows 0, then you can see current N cable connection is standard. If the value is more than 10,
then you can see there is inductive current and the neutral cable connection is not proper. If the
value is 120, then you can know that you have misconnected the neutral cable to the live cable.
… 327 …


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  • We have lost power on our DVR, there is power up to the power supply,
    and the whole system is coupled to a UPS system for some time......
    we have had zero lightning and any effects of load shedding is nullified by UPS system,
    could you kindly inform what could be wrong PLEASE ?
    Chris Gibson 0827932600 Submitted on 22-2-2023 at 12:16

    Reply Report abuse


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