Voltage to temperature

[RSibagatullin]

Hi,
I wrote a basic voltage (thermocouple) to temperature  VI but  it seems to get the wrong temperature even though  it  reads proper  voltage values  from my HP34401a. Do I convert voltage to temperature  properly?  Please help.





Message Edited by RSibagatullin on 07-03-2008 03:53 PM

[RavensFan]

No.  It looks like you may have the 40.5 and the 1,000,000 inverted.  While you add 25 (I assume you are looking at deg C?),  you don't handle the note that says 1 mV output at 25 deg C on page 2 of the manual.

Do you have the reference bath set up?

If the output from the read VI is in Volts, subtract .001 (for 1 mV).  Divide by 1 million.  Multiply by 40.5.  Add 25.

Yours, you take 40.5 and divide by 1 million, then wind up dividing that into the output of your read function.

Message Edited by Ravens Fan on 07-04-2008 01:04 AM