LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

Amplifying Type K Thermocouple for high temp reading with USB 6008

Solved!
Go to solution
Highlighted

I am attempting to amplify a type K thermocouple so that the signal can be read somewhat accurately by a USB-6008. I have looked at the AD595 chip but it states a maximum useful temperature of 100 C and I am going to need to be reading up to 700 C. 

 

Is there another amplifier chip that would work up to this temperature, or should I resign myself to using the signal unamplified and getting a very inaccurate (~30 C/division) reading for temperature?

 

 

0 Kudos
Message 1 of 5
(1,494 Views)
Solution
Accepted by topic author Homericus

The AD595 has a range of -200C to 1250C, here is the data sheet:

 

http://www.mne.psu.edu/sommer/me445/AD595.pdf

 

-AK2DM

~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~
Message 2 of 5
(1,476 Views)

The amplifier itself has an operating temperature range to 125 degrees. Perhaps you confused that with the thermocouple temperature range?

 

Lynn 

Message 3 of 5
(1,471 Views)
Bleh, I feel pretty silly now, especially because I looked over the data sheet a number of times before posting. I was in fact assuming the operating temperature limits as the effective readout temperature limits. Thanks for the help!
0 Kudos
Message 4 of 5
(1,461 Views)

A heads up- some people have ran into issues using the chip with the USB-600x devices, various solutions. You may want to browse of these posts ahead of time:

 

http://forums.ni.com/ni/search?board_id=170&submitted=true&q=AD595

 

-AK2DM

~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~
Message 5 of 5
(1,453 Views)