Preferences > Maximum Sample Rate
The Maximum Sample Rate of the DI-145 is fixed at 240 Hz and cannot be modified in WinDaq software (it is grayed out).
Minimum and maximum sample rate values vary by instrument, but a value that will work for most all instruments is 500 (you can find the absolute lowest maximum burst rate by entering an obviously low number in the text box, such as 10. The software will reject 10 and respond with a dialog box that states the minimum and maximum values for your particular hardware). As a general rule, use the following table: