USB-6001

[Aros]

I am very lost. I want to acquire several temperature readings from a setup using thermocouples, as well as some voltage and current measurements. I have a USB-6001, but from what I’ve learned, it’s not the most suitable device since it lacks CJC for the thermocouples and signal conditioning. As a result, I cannot read the thermocouple signal because it is in the millivolt range. Additionally, it does not have CJC. On top of that, the voltage I need to measure is around 0.3V (300 mV), so I’m also unsure whether I can read it without prior signal conditioning. What should I do?

[santo_13]

You need to buy a new set of hardware to do the thing correctly.

In your case, a cDAQ will be a better fit as you can mix and max modules that are best suited for each type of signal than a universal one.

Can you describe your application and number of required channels for each signal type?

[Aros]

I'm very new to all these topics, basically I would like to read 3 temperature signals around 40ºC with type J thermocouples. For the voltages and currents, which are in the order of (1000-50)mV, I have been able to obtain them directly without signal conditioning. I understand that I need 3 differential analog inputs (AI+ / AI-) for the thermocouples and 4 others for voltages/currents. I have 2 DAQ USB-6001 and a DAQ USB-6212. Buying additional hardware would not be an option, as I am an intern with a very limited budget.

Thank you

[santo_13]

USB6212 is best suited for your mixed application, given you cannot buy new hardware.

[Aros]

First of all, thank you for your time; I wasn’t expecting to receive a response. To wrap up the matter, and if it’s not too much trouble, could you guide me on the hardware I should use to condition the signal? Is there any affordable module that can do it easily? Additionally, I plan to use a thermocouple as a CJC since my DAQ doesn’t have an integrated CJC.

[RIObotics]

Hi there,

You can get this small thermocouple amplifier, I've seen it used with Arduino all the time.

https://www.adafruit.com/product/1778

Just replace Arduino with your USB DAQ.  See here for instructions on how to convert voltage into degrees C: https://learn.adafruit.com/ad8495-thermocouple-amplifier/arduino

BR

John

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[Aros]

Thank you!