long term analog signal acquire

[--Chris]

Is you acquisition configured at N-Samples or Continuous.  Configuring it for N-Samples will produce logs like this because the acquisition will not be a continuous stream of data.  Changing your acquisition to continuous should generate logs with a single waveform.

[sthu]

I was using the continuos samples configuration, but I will double check that tomorrow morning..
thanks

[sthu]

maybe I haven't been specific enough.
The signals inside signal express look fine. I have four signals (four acquired channels), each 15 sec long, but when I use the 'Save to ascii/vlm' function it saves several chunks of data, each 1 sec long (which corresponds to the acquisition settings).

save to ascii settings:
- overwrite once, then append to file
- labview measurement file (.lvm)

 I would like to access the files as a single chunk, that is 15 seconds long in labview.
so basicly the 'save to ascii' function is not doing what I want it to.... how do I get around that? didn't find anything usefull, except that the save to spreadsheat function saves the large single chunk - but I don't want to deal with excel files if possible..

[Mark_E]

Hi sthu,

You have to find the Append to File option. Here’s how to create the entire step. Add Step » Load/Save Signals » Analog (or Digital) Signals » Save to ASCII/LVM. In the File settings tab, choose an export file path. Choose Append to file. Choose Generic ASCII (.txt). In the X values, choose One column per channel. The column that stores the time is included with this option, which is good to know when the samples were taken in time. Without it, you don’t know what the time separation is. However, if you truly don’t want the time column at all, choose Empty time column. All options are described in further detail in the bottom right window.

I hope that helps. Best of luck with your application.

P.S. It’s best to post a new question as a new thread so that the community is aware of a new question (because it’s newer and there aren’t a lot of responses).