Author Topic: Gaussian Resistors  (Read 18332 times)

0 Members and 1 Guest are viewing this topic.

Offline grenert

  • Frequent Contributor
  • **
  • Posts: 446
Re: Gaussian Resistors
« Reply #25 on: November 14, 2011, 04:53:57 am »
Robrenz, those clips are the same ones that Agilent sells for $45 a pair!   ;D
http://www.home.agilent.com/agilent/product.jspx?nid=-536902470.536880336.00&lc=eng&cc=US

Would you mind explaining how reversing the current changes the thermal EMF?  I thought the EMF is the result of dissimilar metals in contact, and would not be affected by the current direction.
 

Offline robrenz

  • Super Contributor
  • ***
  • Posts: 3035
  • Country: us
  • Real Machinist, Wannabe EE
Re: Gaussian Resistors
« Reply #26 on: November 14, 2011, 12:56:39 pm »
Robrenz, those clips are the same ones that Agilent sells for $45 a pair!   ;D
http://www.home.agilent.com/agilent/product.jspx?nid=-536902470.536880336.00&lc=eng&cc=US

Would you mind explaining how reversing the current changes the thermal EMF?  I thought the EMF is the result of dissimilar metals in contact, and would not be affected by the current direction.

It does not change the thermal emf.

read Section 3-19 on current reversal method.  The whole book is excellent.

http://www.keithley.com/knowledgecenter/knowledgecenter_pdf/LowLevMsHandbk_1.pdf

Offline scopeman

  • Regular Contributor
  • *
  • Posts: 159
Re: Gaussian Resistors
« Reply #27 on: November 21, 2011, 01:51:36 pm »
Hello Dave,

You probably know this but there is a statistics add in for Excel that will do all of the statistical analysis for you. Just look under Tools> Data Analysis > Descriptive Statistics.

It is a free add in that most Excel users never turn on.

I find it quite useful.

Sam
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf