USB-6008/USB-6009 Getting Incorrect Voltage Readings
Hardware: Multifunction DAQ (MIO)>>Portable>>USB-6009
Whenever I connect my signals to the analog input channels of my USB-6008/6009, I get incorrect readings. This is regardless of the input configuration. What is wrong and how can I remedy this?
First, check to make sure you are actually reading the analog input channels with the specified input terminal configuration. If you are sure this is correct, you probably have the channels labeled incorrectly.
When you receive the USB-6008/6009, there are labels that you are supposed to adhere to the device. Make sure you place Labels 1 - 16 on the Analog side of the device and Labels 17 - 32 on the Digital side of the device.
Below are the pinouts for the USB-6008/6009. Make sure each channel corresponds to the correct input pin.
Another thing to note is that the pinouts for the USB 6008/6009 OEM cards are not the same as the pinouts for the non-OEM version. If you are using the OEM version, the correct pin diagrams (shown below) are found in the NI USB 6008/6009 OEM User Guide. Please note that the pinout diagram in Measurement and Automation Explorer is for the non-OEM version. If you are using the correct pinouts and are still reading incorrect values from your USB device, please contact National Instruments Technical Support.
Figure 3: USB-6008 OEM/USB 6009 OEM Pin Diagram
Product Manuals: USB-6008/6009 User Manual
KnowledgeBase 3RH97BRM: USB-6008/6009 Analog Input Reads Approximately -1.4V Offset with RSE Connections
Report Date: 03/10/2006
Last Updated: 11/30/2010
Document ID: 3V9J741O