Measuring Temperature of a Thermocouple

[sebgald179]

My partner and I composed a program in LabVIEW that reads the temperature of various thermocouples in our lab. However, we have a problem with the initial measurements. When the program starts, the first reading starts very high and then spikes to normal temperature (~20 degrees Celsius). Is there any reason as to why this is happening and is there a way to fix it so it starts off normally at 20 degrees?

[RavensFan]

No idea.  Could be software, could be hardware.

You haven't attached any VI to see if you programmed something wrong.

If haven't told us what DAQ devices you are using to measure the thermocouple or how you have connected things.

[crossrulz]

What hardware are you using to read the temperatures?  Most likely, you are not properly configuring the channel(s) before your initial read.

[sebgald179]

We are using an NI cRIO (I believe cRIO 9035).  And how can we configure the channels? We are using the variable from the project explorer, dragging it into the VI, and then putting the data into an array. 

[RavensFan]

The cRIO 9035 is just a controller.

What module are you using to read the thermocouple?

If you have a VI, then show it.  Since a cRIO really needs to be a part of a project, then zip of your entire project folder and attach that.  Are you using Scan mode?  Or are you running a VI on the FPGA?

[sebgald179]

We are using scan mode. As for the module, the only device I see in this lab that fits that description is an NI 9213. 

[RavensFan]

That is not your entire project folder.  It is just a lvproj file which is the top level definition of a project that describes the devices used and the VI's used in the project.  It does not include any actual VI's.

[sebgald179]

This is the VI that we made