changing the amount of data displayed in a waveform chart

[nathanb]

Hi,
Thank you for your help in advance. I am trying to produce a waveform chart that will change the x axys (time) so that either 1, 30, or 60 minutes of data is in the display area (everything is in seconds, I've been lazy with the math here). The intention is that the user can, at any time, change the x axys during data aquisition. I have not had any luck using the property node's increment, multiplyer or offset properties.
Any ideas?

Thanks again.
Nathan

[Lab Viewer]

Hi Nathan,
Find attached VI ... you can optimize/change it as you want (this version is displaying last x measurements).
Let me know if you need help.