Graph / Chart show system time in X-Axis.

I try to plot the temperature graph/ chart with respect to my system time. The problem is that the if i select the relative time it starts from 00:00 and if i select absolute time it always starts from 05:00 in 24Hrs.
I need X-Axis Chart/Graph show my system time and in Y- Axis it show the Temperature value which is received from serial port.
Attachments:
Temperature Recorder.vi ‏100 KB

First I am very thankful to you for your kind cooperation. As I am beginner
my questions may be the unintelligent.
I have tried it and now the system time shows in graph. I have also a time
sync problem. After initializing graph with the time being the value of time
does not match with system time. Some time it is faster with respect
to system clock and some time it is slower with respect to system clock. I
observed it is slow when the data of graph is 1 byte long and when the data is
2 or 3 bytes long it goes fast.
The another problem is the chart Y-Axis Interpret HEX value (00 to FF) means 0-255
points only. My data is ASCII string with 4 characters like ‘9562’. Every character
will show the weightage as shown in attached file. I want to use the same ASCII
string to the input of graph for single point. Instead of HEX value (00 to FF).
And the another help from your side can you send me the book name or softcopy of LAB
View tutorial (Easy understandable).
Regards,
Azhar
Attachments:
data.JPG ‏79 KB

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Graph / Chart show system time in X-Axis.

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