Data Display

LabVIEW:

The LabVIEW and stepper motor program has already been written for the user. The LabVIEW program accounts for current being applied, stepper motor calibration, and reading of needed data. The following paragraphs are simply a brief overview of this program. All information comes from National Instruments.

LabVIEW is a graphical programming language that uses icons instead of lines of text to create applications. In contrast to text-based programming languages, where instructions determine program execution, LabView uses dataflow programming, where the flow of data determines execution.

In LabVIEW, you build a user interface by using a set of tools and objects. The user interface is known as the front panel. You then add code using graphical representations of functions to control the front panel objects. The block diagram contains this code. In some way, the block diagram resembles a flowchart.

For more information on LabVIEW consult National Instruments (www.ni.com).

Schematic:

Button Operation:

Refer to Schematic.

File Data:

This is the area in which background information pertaining to each sample is located. This area is used for organization and further review purposes.

Sample Description - Description of the superconductor being tested, which includes

Composition

Tap Length – The distance in cm between the voltage taps on each sample.

Date – Date of experiment

Description Box – This area allows for further description of each sample

Controls:

Power On/Off – Switch used to access power in LabVIEW.

Run – Begins testing of sample

Stop – Ends testing of sample

File Name: Displays name of file to be saved.

Counter: Run time display during testing of sample.

Data Display Curve: A graph of volts/in vs. current

Power Button: This button is lit when power is on, and unlit when power is off.