Complete the following steps to build a VI that uses the Thermometer VI to read a temperature once every second for a duration of one minute.

Front Panel Open a blank VI and build the front panel shown in .

Place a thermometer, located on the Controls>>Numeric Indicators palette, on the front panel. This provides a visual indication of the temperature reading. Place a numeric indicator, located on the Controls>>Numeric Indicators palette, on the front panel. Label this indicator

Seconds
		    Elapsed

. Right-click the indicator and select Representation>>I32 from the shortcut menu.

Block Diagram Build the block diagram shown in .

Place a For Loop, located on the


		    Functions>>All Functions>>Structures

palette, on the block diagram. Right-click the

Loop
		    Count

terminal in the upper left corner of the For Loop and select

Create
		    Constant

from the shortcut menu. Type 60 in the constant to set the

For
		    Loop

to repeat 60 times. Place the Thermometer VI on the block diagram. Select

Functions>>All Functions>>Select a
		    VI

and navigate to

C:\Exercises\LabVIEW
		    Basics I\Thermometer.vi

to place the VI. This VI reads the temperature from the DAQ device. Right-click the Temp Scale input and select Create>>Constant from the shortcut menu. Use a False constant for Fahrenheit or a True constant for Celsius. If you do not have a DAQ device with a temperature sensor on Channel 0, use the (Demo) Thermometer VI instead. Place the Wait Until Next ms Multiple function, located on the

Functions>>All
		    Functions>>Time & Dialog

palette, on the block diagram. Right-click the input and select Create>>Constant from the shortcut menu. Enter a value of 1000 to set the wait to every second. Place the Increment function, located on the

Functions>>Arithmetic &
		    Comparison>>Express Numeric

palette, on the block diagram. This function adds one to the iteration terminal output. Save this VI as Timed Temperature.vi in the C:\Exercises\LabVIEW Basics I directory. Run the VI. The first reading might take longer than one second to retrieve if the computer needs to configure the DAQ device. If time permits, complete the following optional and challenge steps, otherwise close the VI.

Optional Build a VI that generates random numbers in a While Loop and stops when you click a stop button on the front panel. Save the VI as General While Loop.vi in the C:\Exercises\LabVIEW Basics I directory.

Challenge Modify the General While Loop VI to stop when the stop button is clicked or when the

While
		Loop

reaches a number of iterations specified by a front panel control. Select File>>Save As to save the VI as Combo While-For Loop.vi in the C:\Exercises\LabVIEW Basics I directory.