Questions concerning waveform display

Hi folks,
I am in trouble again. I try to modify one example to achieve my own goal. But there are some questions I am confused.
I want to display a voltage signal with 0.5 V offset and 1 V amplitude from multimeter.In the labview VIs, I have to choose 'DC Voltage' in the 'Function' controller, but the data can't display correctly when I chose 'AC Voltage' (the range displayed is 0 to about 0.35 V).What's more, the graph in 'Waveform Chart' looks strange, I want to get some signal like Sine signal, but I don't know how.
Here is the VI front panel:
Attachments:
waveform_display.JPG ‏80 KB

Hi Dennis Knutson,
Frankly I am not sure how to change the scan rate of the multiple readings. Is it the 'sample count' controller in the front panel?
The frequency of the sine wave i use is 10 Hz, just for testing.
The actual VI is attached here:
Attachments:
display.vi ‏21 KB

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