VR

Main Functions and Features :

• Test the information of standard/non-standard PoE device, such as voltage, polarity, midspan or endspan.

• Identify the type of PSE, it is af or at standard.

• Test of real-time power consumed by PD devices in PoE power supply systems.

• Test the open, short, cross status in the network cable.

• Test the power consumed by DC appliances.

• The loop test function of the switch.


Main menu for the tester:

(1) POE --- POE switch test and POE power test.

(2) CONT---Test open,short, and cross.ect.

(3) Power---Test voltage and current between the power adapter and the powered device, as well as calculate the power consumed by the powered device.

(4) Setting---Set up , backlight time, auto power off time, contrast, and versions.


PoE testing function:

Connect a Lan cable with PoE switch and NF-488 (PoE port). After the correct connection, a fluctuating voltage value will display at the screen. 

At this time, press "Enter" to start testing, and the result will display on the screen.


a. Standard PoE equipment:

If the tested PoE switch is a standard one, the testing result will display as the following image.                                             



b. Non-standard PoE equipment:

If the tested PoE switch is non standard one, the testing result will display as the following image.


c. Error connection

If the test result display connector.it means that the connection is not normal or other PoE devices are connected to the circuit.After reconnecting correctly,you can test again.



d. No connection

If the testing results is unconnected,it means the PoE equipment is not detected.

PoE power test:

In the PoE power test, a PoE power supply device and a PoE powered device (such as a PoE switch and a PoE camera) need to be connected to NF-488(PoE port).

After the correct connection, a fluctuating voltage value will display at the screen. A few seconds later, and it will automatically enter the power testing interface.The display information is like the following image.

When the screen is displaying PoE power, press the Enter key to identify the type of PSE easily. If the "Non-standard" appears, it means the PoE power supply device does not comply with the PoE standard. If no new message appears, it indicates that the PoE power supply device complies with the PoE standard. (PoE power is the power currently consumed by the PoE powered device.)u can use the PoE switch test function to test separately.



Special circumstances:

If a PoE device is connected to NF-488 and enters the power display interface directly like the following first image, it means that the PoE device is non-standard type. Under this condition, press the Enter key to see the screen prompt message as "Non-standard" like the following second image.



Wire Mapping Test:

This function is to check cable short, open , and cross status. The tested cable can be UTP 8-core network cable or STP 9- core network cable.

Good connection status.


a. If there is only short circuit, or short & cross, open status exists together, the device would only display short circuit, not other status:

b. Other status display.


c. If the test result is "Cable open*', it might be these reasons,

1. cable is indeed open,

2. the cable is not connected to the emitter,

3. disconnect the remote at the remote end.


Power Test Function

This function is to test voltage , current and power between the power adapter and the powered device. Connect your power source adaptor to "DC in" port of NF-488, and use a DC-DC cable (included in the accessories) to connect to "DC out" port of NF-488, the other end to the powered device like a camera, then choose "Power" at the menu, then the results will display immediately as below image.


Loop-back Test

This function is to test whether the loopback of the network cable that connected to switch is working properly.

Connect the switch port to the loop-back port of NF-488 with a network cable.If the indicator is on,it means the loop is proper.lf the indicator is off,it means that there are problems in the loop.and"Loop testing will be always on the screen in this working mode,which is normal.




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