Actually, it is very hard to read your vi..
What do you need to do is : make a subvi for ConfigureHeater and put on the front panel a ConfigureHeater button for both 1 and 2. Put some default values for the configuration: you are often going to use a K thermocouple so put a constant K. when you will change the thermocouple you can change the constant. You are not going to sell this software so don't put a lot of options on it. If you are the only one to use the software make it adapted to yourself. It may not be very good for your future career as a software engineer but that's not your problem at this moment.
Then, make a state machine : put a button Start.. When you press start the state machine will go on otherwise it will wait on a dummy state "idle" or so... Put a 250 msec wait in the while cycle...
After "Start" you pass on a state "Initialize Hardware" (or something like that) where all the values are initialized (Visa address, etc).. After that you go to the step "Set Temperature" then "Heat 1", then to Heat 2, then Measure dV, then Plot and Save, .. then go again to "Set Temperature".. or you stop if error occurs... There is a nice tutorial with a Coke machine somewhere on the Ni pages, look at that at make small subvis
nobody can correct your vi, for me it will be much easier to make a new one
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