Author Topic: T.C. measurements on precision resistors  (Read 244774 times)

0 Members and 1 Guest are viewing this topic.

Offline guenthert

  • Regular Contributor
  • *
  • Posts: 195
  • Country: us
Re: T.C. measurements on precision resistors
« Reply #1025 on: August 24, 2018, 08:58:24 pm »
guenthert,

Is it possible to determine the type of metal used in the binding posts? I have wondered about those resistors and what was used to make them. Are the posts silver plated or possibly ferrous?
I know next to nothing about materials.  All I can say is that it has the colour of steel (more or less -- the white balance in the picture above is off) and isn't (strongly) ferromagnetic.
 

Offline TiN

  • Super Contributor
  • ***
  • Posts: 3741
  • Country: tw
  • xDevs.com/live - 24/7 lab feed
    • xDevs.com
Re: T.C. measurements on precision resistors
« Reply #1026 on: August 24, 2018, 08:58:31 pm »
Annual stability 20ppm for 0.01 class tolerance, tempco determined by alpha, beta values, which provided for each standard experimentally :) anything else you want to know? :D
YouTube | Chat room | Live-cam | Have documentation to share? Upload here! No size limit, firmware dumps, photos.
 
The following users thanked this post: guenthert

Offline MegaVolt

  • Regular Contributor
  • *
  • Posts: 78
  • Country: by
Re: T.C. measurements on precision resistors
« Reply #1027 on: August 24, 2018, 11:36:18 pm »
Thanks a bunch.  Wished I'd be able to read Russian though.
Ask what is interesting I will translate :) I think it will be easier for me to type in Russian and translate into Google.
 

Offline TiN

  • Super Contributor
  • ***
  • Posts: 3741
  • Country: tw
  • xDevs.com/live - 24/7 lab feed
    • xDevs.com
Re: T.C. measurements on precision resistors
« Reply #1028 on: September 04, 2018, 10:19:24 pm »
Phew. My initial sorting of 75 recently acquired resistors completed.
Enjoy sorted table with results at attached. I sorted them by tempco.

It took a month of runtime my instruments, to collect the data. :)

« Last Edit: September 04, 2018, 10:23:00 pm by TiN »
YouTube | Chat room | Live-cam | Have documentation to share? Upload here! No size limit, firmware dumps, photos.
 
The following users thanked this post: Echo88, Dr. Frank, Andreas, e61_phil, doktor pyta, razvan784, Magnificent Bastard

Offline babysitter

  • Frequent Contributor
  • **
  • Posts: 765
  • Country: de
  • pushing silicon at work
Re: T.C. measurements on precision resistors
« Reply #1029 on: October 10, 2018, 02:39:31 am »
Time to enjoy a cool drink. Broken P331 give stylish cocktail containers when you replace the resistor windings in the hermetic part with alcohol-water-mix (as integrated cooling pad) and solder two tin layers with air gap (for isolation) into the bottom.

I'm not a feature, I'm a bug! ARC DG3HDA
 
The following users thanked this post: Dr. Frank, Andreas, Henrik_V

Offline Andreas

  • Super Contributor
  • ***
  • Posts: 2202
  • Country: de
Re: T.C. measurements on precision resistors
« Reply #1030 on: October 10, 2018, 05:01:30 am »
Hello,

I am missing the thermometer for the "measurement thread"

with best regards

Andreas
 

Offline thermistor-guy

  • Regular Contributor
  • *
  • Posts: 186
  • Country: au
Re: T.C. measurements on precision resistors
« Reply #1031 on: November 21, 2018, 01:52:54 pm »
I have just read the entire thread.

Thanks to Andreas for all the hard work, and to everyone who contributed their comments. There is a wealth of information here.
 
The following users thanked this post: Andreas


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf