Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page
DAQ channel configuration
msinclair
Member
08-12-2004 10:17 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I have a data collection application using LabView 5.1. I am trying to collect a differential voltage signal at high speed using a PCI-1200 I/O board connected to a CB-50 LP. I have the two leads connected to ACH0 & ACH1 respectively.
I am using the High Speed Data Logger "solution" which dumps the data into a Binary File. I created another VI to copy that data batchwise into Spreadsheet files. This works well, but:
Each time I power up the system and collect data, it seems like I have a different "scaling" factor (though I didn't think binary data was scaled at all). I can always analyze the resulting data (and it is very consistent UNTIL I come back the next day and try to compare one day with the next . . . )
The other part of t
his that puzzles me is that I have several "virtual channels" configured (for the same device) which all look identical when I look at the configuration screens in the Data Neighborhood. Each gives radically different data from the other. I can't figure out what is different and/or where to get more configuration options.
I would greatly appreciate any thoughts on:
1. Why I get significantly different data from one day to the next with the same differential signal.
2. Where I can see more configuration options for the virtual channels.
Thanks in advance,
Marc
I am using the High Speed Data Logger "solution" which dumps the data into a Binary File. I created another VI to copy that data batchwise into Spreadsheet files. This works well, but:
Each time I power up the system and collect data, it seems like I have a different "scaling" factor (though I didn't think binary data was scaled at all). I can always analyze the resulting data (and it is very consistent UNTIL I come back the next day and try to compare one day with the next . . . )
The other part of t
his that puzzles me is that I have several "virtual channels" configured (for the same device) which all look identical when I look at the configuration screens in the Data Neighborhood. Each gives radically different data from the other. I can't figure out what is different and/or where to get more configuration options.
I would greatly appreciate any thoughts on:
1. Why I get significantly different data from one day to the next with the same differential signal.
2. Where I can see more configuration options for the virtual channels.
Thanks in advance,
Marc
