DAQ USB 6009 slow

[Saille]

Hi everyone

I'm measuring the charge and discharge of a capacitor using the DAQ USB6009.

But the graph and data stored start to get slow after a few hours

Do you know why?

[GerdW]

Why?

Because you seem to create ever growing arrays?

Because you seem to open and close files in each iteration?

Do you really think you need to convert a waveform into a string array to get a minimum value?

[Saille]

I need to collect the tensions per second, and saves them in real time, and then generate a table.

I realized that after 2000 seconds a instability in measurements, it begins and become slow.

Question: How do I set up DAQ so I get a smaller number of sample per second?

[Hooovahh]

---

@Saille wrote:

Question: How do I set up DAQ so I get a smaller number of sample per second?

---

In the DAQmx Timing function specify the sample rate.