Why LV 6.1 and Nidaq 6.9.3 can't acquire low sampling rate and high frame size

[Kusumah]

My platform is LV 6.1, Nidaq 6.9 on win98
Everytime i want to acquire data with sampling rate 6 Hz
and frame size 7200, it acquire just 2 or more data (under 10 data), never 7200 data.

[JustinBritten]

Greetings,

I assume by "frame size" you are referring to the numbers of samples to acquire. Please launch the "Find Examples" browser in LabVIEW 6.1. Open the example "Acquire N Scans.vi." This VI has only 4 inputs. After setting your device and channel you will set number of scans to acquire to 7200 and your scan rate will be 6. Since you're only acquiring at 6Hz and wanting 7200 samples, this VI will take 20 minutes to run. At that point the graph will be updated with your data.

Regards,
Justin Britten

Applications Engineer
National Instruments