What is the absolute range for the NI-DAQ?

I am trying to measure a 10 to 50 mV off of the NI-DAQ card NI-9205 .
I know that the range is from 200mV to 10V.  What am wondering is if there is a way to capture even smaller values?

Hi mike.tyler, 
The range of the DAQ card does not specify the minimum voltage you can measure, but rather how much that analog-digital converter (ADC) needs to amplify your signal. The range of the ADC is -10 to +10 volts, and when a range of -0.2 to +0.2 volts is specified, the signal is amplified to meet the voltage range of the ADC. LabVIEW automatically selects the voltage range based on the minimum and maximum voltages you specify when you create a DAQmx task. 
I think what you need to know is the smallest voltage change in your signal that you can detect. When using a 200 mV range, the smallest voltage change that that can be detected is 4 uV, which is given in the 9205 user manual. Thus, you should be able to measure your 10-50mV signal just fine. Sincerely, 
Julianne K
Systems Engineer, Embedded Systems
Certified LabVIEW Architect, Certified LabVIEW Embedded Systems Developer
National Instruments

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