k-type thermocouple

[Oscar97]

Hi, actually I wanted to graph the change of temperature of the thermocouple versus time. Does anybody has any idea other than thermocouple DAQ card?

[RTSLVU]

To read thermocouples you need to use a device that is intended for reading thermocouples, as these devices take care of the "cold junction" compensation needed to accurately take temperature measurements.

That being said there are less costly devices out there than a DAQ card.

Measurement Computing has some reasonably priced options. http://www.mccdaq.com/solutions/USB-Temperature-Solutions.aspx

If you want to go really cheap Adafruit has these Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) - v2.0 for about $15 each.

But they are I2C devices so you would also have to add in something to interface to I2C like an Arduino.

[_Bryan]

The thermocouple card would be the easiest and most straight forward.  But you could buy/build a themocouple amplifier that outputs voltage or mA.  Then you would need DAQ card to read the output.

Another way is if you had a device that could read the temperature and output it over tcip or rs232.  Then you could use LabVIEW to read the data.

It would help if you gave the reason why you do not want to use a TC DAC card.

[Oscar97]

hi, well i have this k-type omega thermocouple and i must procceed with that .The problem is that i dont know how should i connect that to computer and how the daq card will work with it.

[_Bryan]

---

@Oscar97 wrote:

hi, well i have this k-type omega thermocouple and i must procceed with that

---

That is fine, but you will need more than a thermocouple to do what you want.  Is this for school or work?  Either way you need some hardware to get the TC signal into the computer so LabVIEW can read it.  Is this the entire project?  Or is this a small part of it?

[Oscar97]

yes it is the entire project and from that i have to get the specific heat and latent heat. But im just give a thermocouple and I know he owns stuff for measuring the voltage(DAQ). 

[_Bryan]

Ok, we are one step closer.  So now you need to find out what kind of "stuff" he has for measuring voltage.  Maybe something he has will measure the thermocouple.