ni 9219 _ measurement uncertainty _ sensitivity

[NProust]

Hello,

I'm using a NI 9219 in current mode to acquire several signals, and I need to calculate the measurement uncertainty due to the module.

In order to do so, I must know the resolution, the absolute accuracy and the sensitivity.

According to the manual (specifications start page 23) :

- Resolution is 24 bits

- Absolute accuracy is function of gain error and gain offset (For typical use : Absolute Accuracy = Gain error * measured value + gain offset * full range)

- Sensitivity is ???

How can I know the sensitivity of the module in current mode ?

Thank you & Regards

Noé

[Maxime_L]

Hi Noé,

If the sensitivity is not specified then it should be calculated dividing the range you use by the number of possible values.
As you use a 24 bits the result should be something like : (25 - (-25)) mA / 2^24 values.

I hope it helps even though I may be mistaking.