You've posted to the board for NI DMMs and should have posted to the Instrument Control board.
In any case, if you want more samples than what can be stored internally, you can perform a series of multipoint readings but you will have some gaps as you have to transfer what is stored before you can initiate another reading. Depending on what kind of sample rate you need, you might be able to perform that number of single readings. Place the Fetch Measurement in a loop. If your desired sample rate is higher than what the instrument can do, you might want to look at using different hardware. A DAQ board is going to have significantly higher sample rates and transfer speeds.
