Connecting multiple thermocouple indicators to one DAQ Assistant block diagram

[Squinn21]

I am a new user. I have 3 thermocouples connected to a DAQ card and I put all 3 channels on one of the DAQ assistant blocks in the block diagram. When I connect the data to the 3 thermocouple indicators, they all read the values from the 1st channel. How do I get them to read the other 2 channels?

thanks, Scott

[aeastet]

Are you using MIMAX to veiw the channels and the outputs? If you did check to make sure that you have set each thermocouple up with it's own chammel. See attached

[Squinn21]

I did that. The indicators are only reading the 1st channel I specify in the configuration window in the DAQ assistant setup. Should there be an optioin somewhere to select which channels go with which indicators?

[aeastet]

How are you looking at the output values?

[Squinn21]

Not sure what you mean. I inserted 3 thermocouple indicators and connected each of them to the data link on the DAQ assistant.

[aeastet]

So you have three thermocouples wired to a break out board or something of that nature. Then you opened Labview and started a daq Assistant to view the data. Correct?

Do you have your code for me to look at?

[Squinn21]

I'm not that computer savy so lets try this another way. I have 3 thermocouples conected to a NI CB-68LP, which connects to a DAQCard-6024E. What is the easiest way to set labview so I can view all 3 indicators in the same window and export the data to one file?

thanks for your patients and help, Scott

[Alain_S]

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Squinn21 wrote:

... ... What is the easiest way to set labview so I ... ...

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The easiest way is to use the "Help" and then "Find Examples"

On the bottom of the window there's a "Hardware" drop down box.

If you select there your DAQ 6024 card, only examples related to that card will be showed.

Once you selected one, modify it to your needs and if you still encouter problems, come back with some code 🙂

[aeastet]

Thermocouples put out an extreamly small change in voltage. Normally you would have to amplify the signal and compensate for cold junction to ensure that your readings are accurate. This can de done many different ways. NI has a few modules that can do that for you or there are other companies that also have things like this. This card is really not made to measure unamplifed thermocouples. We may get it to work but since it is a 12 bit card you may not get good accuracy especially if the signal is not conditioned.

Can you save your code and send it to me so I can try and take a look at what you have so far.

[Squinn21]

I have attached my file. hopefully someone can help.