Is there a way to cycle a while loop on its own and only controlled by the number of cycles?

[migrod1]

Okay so took your advice and I cleaned up the VI a bit and now its working and cycling perfectly. Also the stop function now works. There's just one problem, my graph isn't plotting the temperatures at all.

Again sorry if this VI is crude, I'm still learning the program.

Also I'm using 2009

[kbbersch]

It looks better.  I'm not sure what kind of data you expect to be plotting but it looks like you only have one set of points each iteration and no historical data so you're not going to get anythig but one point on the graph.  Use a shift register and build array to track the data.  I've attached a 2009 VI with notes on the block diagram.