sensitivity of DAQ 6281

[Billntinas]

Hi everyone

I have the DAQ card NI 6281 and I want to obtain analog voltage signal in the range of mV (0.001V - 0.010 V) . I would like to ask you is it possible to receive the signal in the aformentioned range? What is the sensitivity of my card? I checked in the detailed specifications and it is written for the analog input the input range is +/- 10V. +/- 5V. +/-2V, +/- 1V, +/- 0.5V, +/- 0.2V, +/- 0.1V. I would like someone to confirm me it will be possible to measure my signal or not...

Additionally I am using a BNC - 2090 rack - mount BNC accessory and I would like to ask you if this influences the sensitivity of my DAQ setup.

Kind regards from France

Vasileios

[Aaron_W.]

Vasileios,

NI has an Accuracy Calculator linked here. You can select the NI 6281 and put in the appropiate values for your application. Putting in some quick numbers you should be able to measure the 1 mV signal with around 20 uV or accuracy. There are details on the formulas used and the factors that will determine accuracy. 

As for the BNC-2090, I doubt that the terminal block itself is going to cause a lack of accuracy, however cable length, noise on the signal and other items are things to consider.

Hope this helps.

[johnsold]

Aaron,

That is a nice calculator. Any chance it will be updated to include all, or at least many, of the more modern devices?

Lynn

[Aaron_W.]

Lynn,

I'm not sure if NI is looking into that or not. You can always submit feedback for NI on their website. Probably the best place to start.

Feedback:

https://www.ni.com/contact-us/feedback/en-us/

[Billntinas]

Hi! thank you all for your time

Vasileios