User’s Manual
377
section shall be more than 20mm
2
.
The ground cable of the monitor system cannot short circuit or mixed connected with the strong
alternative current cable.
For all the ground cables from the control room to the monitor system or ground cable of other
monitor devices, use the copper resistance soft cable and its section shall be more than 4 mm
2
.
The monitor system usually can adopt the one-point ground.
Connect the ground end of 3-pin socket in the monitor system to the ground port of the system
(protection ground cable)
Appendix 7.4
The Shortcut Way to Check the Electric System by
Digital Multimeter
For 220 VAC socket, from the top to the bottom, E (ground cable), N (neutral cable), L (live cable). Refer
to the following figure.
Appendix Figure 7-4
Socket
There is a shortcut way to check whether these three cables connection are standard or not (not the
accurate check).
In the following operations, the multimeter range shall be at 750 V.
For E (earth cable)
Turn the digital multimeter to 750 VAC, use your one hand to hold the metal end, and then the other
hand inserts the pen to the E port of the socket. See the following figure. If the multimeter shows 0,
then you can see current earth cable connection is standard. If the value is more than 10, then you can
know there is inductive current and the earth cable connection is not proper.
Содержание DH-XVR71 H-4K-I2 Series
Страница 24: ...User s Manual 15 Fasten screws...
Страница 67: ...User s Manual 58 TCP IP Configure the settings for network parameters...
Страница 103: ...User s Manual 94 Main menu...
Страница 114: ...User s Manual 105 Analog channel Digital channel Configure the settings for the image parameters...
Страница 189: ...User s Manual 180 Details Click Register ID Register ID Click to add a face picture...
Страница 212: ...User s Manual 203 Search results Click the picture that you want to play back Playback...
Страница 235: ...User s Manual 226 Search results Select the face that you want to play back Registered information...
Страница 239: ...User s Manual 230 Details Click Register ID Register ID Click to add a face picture...
Страница 254: ...User s Manual 245 Sensor pairing In the Access Type list select USB Gateway Click Add Add USB gateway Click Pair...
Страница 314: ...User s Manual 305 Main stream Sub stream...
Страница 347: ...User s Manual 338 Update Click Update Browse Click the file that you want to upgrade Click OK...
Страница 362: ...User s Manual 353 Legal information...
Страница 370: ...User s Manual 361 Abbreviations Full term VBR Variable Bit Rate VGA Video Graphics Array WAN Wide Area Network...
Страница 388: ...User s Manual 379 Appendix Figure 7 7 Check neutral cable connection...
Страница 394: ...User s Manual...