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Checking the System
3-14
UDAS DriversUDAS Drivers
Verify the UDAS system driver is properly installed by following the instructions for the USB
Port (above).
Click on the plus sign (+) located next to the Universal serial bus controller. When the directory
opens, double-click III Taos USB Data Acquisition System. A pop-up window appears displaying a
message that reads, This device is working properly.
If the III Taos USB Data Acquisition System icon does not appear in the USB devices list, verify
that both of the LEDs located on the front panel of the UDAS unit are illuminated. Verify that
your external equipment is not consuming excessive power. Refer to the power test in the next
section.
Power TestPower Test
For proper operation, the power test requires:
• the UDAS device be powered.
• the UDAS device be connected to the USB.
• the UDAS device pass its power on self-test (POST).
• the UDAS device be initialized by the host computer.
To perform the power test:
1. Unplug the USB cable from the UDAS port.
2. Plug the USB unit cable back into the UDAS port.
• One LED illuminates immediately, indicating power.
• The computer monitor may display the Busy hourglass icon while the UDAS unit
initializes.
• The UDAS status LED illuminates after POST and host enumeration.
3. Verify the UDAS unit has two LEDs illuminated.
Troubleshooting Errors
If the two LEDs do not illuminate:
• Disconnect the I/O signals from the unit.
• Unplug the unit for several seconds then reconnect the unit to see if the LEDs illuminate.
Some built-in tests may fail if the board was incompletely reset, even for components that are
functioning normally.
• Verify the unit is receiving power and the power LED is illuminated.