convert binary data to scaled data

[jeongho20000]

Hi,

If I got a binary data from DAQmx Read.VI (Analog 2D I16 Nchan Nsamp), how can I convert this to scaled data?

Best,

Jay

[Dennis_Knutson]

Depends. If you have a new M series board, with it's advanced calibration technique, you have to apply the scaling coefficients. There is are examples called Cont Acq&Graph Voltage-To File(Binary).vi and Graph Acquired Binary Data.vi that show how top obtain the property and how to scale data with the coefficients.

If you are converting to scaled data in your acquisition VI, why acquire as I16?

[jeongho20000]

Dear Dennis,

Thanks for your reply. I have E series board. In this case, I can't ues the property node, can I? Is there any alternate way?

I am acquiring as I16 since I need bouth I16 and scaled data.

Thanks,

Jay

[Dennis_Knutson]

Then it's linear. Get your voltage range, and divide by how many steps you can have (if you have a 12 bit a/d, this 2**12). This is your scaling factor.

[jeongho20000]

Thanks, Dennis.

But could you tell me in detail? I've just started to learn LV recently, so I need your more explanation.

Thanks, again.

Jay 

[jeongho20000]

I have a voltage range -5/+5. I'm not sure what you meant by number of steps. I don't know what a/d is.

Thanks,

Jay

[Dennis_Knutson · Accepted solution]

See if this makes sense. There's probably a property for the number of bits the A/D has but I can't think of it right now and can't spend toom much time looking.

[jeongho20000]

Thank you so much, Dennis. You save me. 🙂

Best,

Jay