How to choose sample fréquency

I have a chart of acquisition for Ni pci-6281M SERIE , my question is how to program low-pass filter and how to choose the frequency of sampling in mode continuous sampel, and cut's buffer in éxecution. I usethesoftwareLabVIEWsignalexpress

translate in english
Hi Andy-C and I thank you very much. I have a sensor for non-destructive control "eddy current" that a coil that has the following characteristics:
170 = number of turns
the inner radius = 2.35mm
the outer radius = 4.5mm
height = 2.2mm
I want to acquire with the pci-6281 voltage and current for a powersignal:
V = 2V rms
f = 100khz frequency
My question is how to choose the timing parameters (sampling rate and sample size to read) and how to measure the current. software used LabVIEW signalexpress .

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