Hi TrH_Linh,
It is beginning to sound like your board may need to be sent
in for repair. Before going through that
process, let’s try doing a loopback test.
The loopback test makes use of your board’s internal channels and so no
external wiring will be necessary. Go
ahead and disconnect any wires or other connections you have made prior to
starting the test, and also close any NI software programs that you may have open.
Directions for Loopback Test:
Purpose: Read an
analog output signal on an analog input channel using internal connections.
- Open
Measurement & Automation Explorer (MAX) and find the entry for your
device. It can be located by looking under My System >> Devices and Interfaces
>> NI-DAQmx Devices >> NI USB-6259.
Right-Click on the entry for the NI USB-6259 and select Test Panels.
- In the Test
Panel, go to the Analog Output tab and choose the following settings:
- Channel Name - Dev1/ao0 (your device number maybe different)
- Mode - DC Value
- Output Value - 5
- Click "Update" to
begin outputting a DC voltage at 5 volts
- Open LabVIEW 8.2. Go to Help >> Find Examples. In the Example Finder, use the folders on the
right hand side to find the following example: Hardware Input and Output >> DAQmx
>> Analog Measurements >> Voltage >> Acq&Graph
Voltage-Int Clk.vi
- On the front panel of the Acq&Graph
Voltage-Int Clk VI right-click on the drop down box for “Physical Channel” and
select “I/O Name Filtering…”
- In the Filter Names dialog box,
check the box next to “Internal Channels” and then click ok.
- In the drop down box for “Physical
Channel” select “Dev1/_ao0_vs_aognd” (Again, your device number maybe
different). Selecting Dev1/_ao0_vs_aognd
will allow us to make an internal connection to the analog output channel.
- Run the VI.
In the graph on the front panel of the Acq&Graph
Voltage-Int Clk VI you should now see a reading of 5 volts.
If you can read 5 volts, you might try a sine
wave by going back to the Test Panel and changing the mode to “Sinewave
Generation.”
If you cannot get a reading of 5 volts, then most likely
your board needs to be sent in for repair.
Please go to http://www.ni.com/support/
and click “Ask an Engineer” to generate a service request and get the repair
process started.
Jared T.
