Temperature measurements display incorrectly after opening a project.

Question

Dear All,
I am having some difficulty in setting up LabView SignalExpress version 5.0.0 to display RTD temperature measurements from the NI9217 module and the NI cDAQ-9178.
I have two problems:
1. I cannot set the waveform chart to show the desired time interval; I need to set the time interval displayed on the chart to 30 minutes. This means that before taking 30 minutes of continuous measurement the user would see a fixed grid with fixed time boudaries and the plot moving from the left hand side of the screen to the right hand side of the screen. After thirty minutes of measurements have been taken, the chart would begin to "scroll"  so that the earliest measurements move off the screen and the chart still displays the time interval of 30 minutes.
2. I need the chart to display correctly immediately after the project has been opened; When I open the project and click the 'run' button, the windows are all displayed correctly but the readings are not displayed correctly, the chart only displays one short line to the right of the screen and a very short time interval of less than a second. I can correct this by changing to a Time XY Graph and then back to a waveform chart but need this to display correctly as soon as the software is opened. The incorrect and the corrected chart are shown below:
The chart below is displayed when the software is opened and the run button is clicked. This chart style is incorrect because the temperature line is displayed in the bottom right of the chart and only for a short time interval.
The chart below is closer to the required graph described in point 1 but I cannot set the time interval to stay fixed at 30 minutes, nor can I make the software display the graph like this on opening, I always have to switch to a different chart type and then switch back to a Waveform chart to replace the format above with the format below:
Any help would be appreciated,
Thanks,
Matthew

Answer 1

Hi Matthew,
We should be able to used this function to save the graph settings as well. I have just tried it on my system and got it to work. the procedure I undertook was:
Open my Signal Express Project
Turn off x-axis auto scale (Right click on graph >> X Scale >>Auto scale)
Enter Properties (Right click on graph >> Properties)
Select the scales tab
Select 'Relative To' under the Timestamp Type.
Set the min as 0 and the max as 1800...Press OK
View >> Layouts >> Make Current Project Layout Default
Save
In this case I used the Relative Timestamp Type but you can use whatever time stamp you wish. When opening up this project after doing this the graph is formatted as required immediately.
Let me know how you get on with this.
Regards,
Aaron. E
Applications Engineer Team Lead
National Instruments
ni.com/support