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passing data to a chart outside of loop with continuous updating

Hi.  I am sure someone's done this but i don't find it.  I am running a device in a loop to measure temperature.  i want to graph the temperature as a function of time, continuously.  after an event occurs, i want to change some values and keep reading temperature but updating the graph that i had.  like this:

1. start reading temperature, start continuous graphing of temperature

2. turn on heater

3. when temp reaches setpoint, change heater power

4. keep updating graph showing resulting change in temperature

5. when temp reaches new setpoint, change heater power

and so on

 

anyone know how to do this?  i am going to have many data points as i am collecting at 1kHz

 

thanks!!!

 

3.

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Please attach a simplified version of your VI.

 

Why is the "chart outside the loop"? What kind of "event" occurs?

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