01-06-2010 09:22 PM
Hello,
My USB-6289 has developed a sudden problem with its +5V DC out. I was checking the signal quality of the +5V signal on my oscilloscope, disconnected, connected a counter (PFI12, ctr0) to the scope, ran a few pulse trains (I am using Igor Pro to control the DAQ), stopped the counter, and reconnected the +5V signal to find that is dead.
I am not sure if I have inadverdantly overloaded the output somehow. The USB-6289 does self-test OK, and the digital and analog output still work fine. It is just the +5V that is not outputting -- is there a software option that may have accidentaly turned it off?
Regards,
Arun
01-06-2010 09:44 PM
Here is the DAQ Diagnostic Test 2.0 result. It shows that one of the DAC's (A0) is malfunctioning, but says that the digital i/o is ok -- what does this mean? Can there still be hardware damage?
Selected Device: Dev2
Device Type: USB-6289
Serial Number:
Device Support: UNKNOWN. The selected device may be newer than your version of the Diagnostic Utility. Although the tests may appear to run properly, the results could be inaccurate.
NI-DAQmx Version: 9.0 (PASS)
Device Reset: (PASS)
The device was last self-calibrated on: 5-28-2009 3:05:04 AM
Running Calibration ... (PASS)
-------------------- Testing Counters... --------------------
Testing CTR Buffered Pulse Generation... (PASS)
Testing CTR Single Pulse Generation... (PASS)
-------------------- Testing Analog Input... --------------------
Testing AI Ground Reference... (PASS)
Testing AI Voltage Reference... (PASS)
Testing AI Finite Sample Clock... (PASS)
Testing AI Finite Sample Clock Frequency... (PASS)
-------------------- Testing Analog Output... --------------------
Testing AO Finite Sample Clock... (PASS)
Testing AO Finite Sample Clock Frequency... (PASS)
Testing AO Single Point... (FAIL)
************ Test FAILED for the following reason ************
This test failed to output 9.000000 Volts on Dev2/ao0. The actual value written was 0.083467.
*******************************************************
Testing AO Accuracy... (FAIL)
************ Test FAILED for the following reason ************
This test failed to generate a voltage waveform with an error of less than 0.007621 Volts on Dev2/ao0. The actual average error was 0.557294 Volts.
*******************************************************
-------------------- Testing Digital IO... --------------------
Testing DIO Lines... (PASS)
Testing DIO Ports... (PASS)
----- DIAGNOSTIC TEST COMPLETE -----
01-07-2010 05:36 AM
The +5V pin should always be high. Are you sure it's not shorted to GND (or some other low signal), maybe in your DUT board?
If not, I fear the output stage is damaged...
01-07-2010 04:07 PM