PMEL Forum

K Sections => K1/8 - DC/Low Frequency => Topic started by: Hawaii596 on 11-19-2008 -- 23:12:55

Title: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: Hawaii596 on 11-19-2008 -- 23:12:55
You know what I love about my job?  I really love working with high accuracy standards.  I started my new position in Texas a little over a month ago, and am in process of pulling together the somewhat idle standards lab.  I have an assortment of Fluke 742A's, Tinsley 5685A's (very nice), some Guildline 9330 series, a Thomas 1 Ohm, an SR104 10KOhm, and others.

I have a couple of Leeds & Northrup 4333 0.001 Ohm, 30 Amp Shunt resistors.  There is some cal history on them, so I have some ideas.  A couple of the certs state a +/-0.005% tolerance; all the rest just state the measurement uncertainty (one was really nice - - +/-0.58 ppm).

Anyway....  does anyone have a datasheet on the L&N 4333, or something documented as to its various specs?  I'll be working on accreditation scope in coming months, and would love to be able to include them. 
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: flew-da-coup on 11-20-2008 -- 11:21:56
You know what I love about my job?  I really love working with high accuracy standards.  I started my new position in Texas a little over a month ago, and am in process of pulling together the somewhat idle standards lab.  I have an assortment of Fluke 742A's, Tinsley 5685A's (very nice), some Guildline 9330 series, a Thomas 1 Ohm, an SR104 10KOhm, and others.

I have a couple of Leeds & Northrup 4333 0.001 Ohm, 30 Amp Shunt resistors.  There is some cal history on them, so I have some ideas.  A couple of the certs state a +/-0.005% tolerance; all the rest just state the measurement uncertainty (one was really nice - - +/-0.58 ppm).

Anyway....  does anyone have a datasheet on the L&N 4333, or something documented as to its various specs?  I'll be working on accreditation scope in coming months, and would love to be able to include them. 
Actual value with stated uncert. will be fine. Label the shunt with the actual value.
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: scottbp on 11-20-2008 -- 13:13:15
Wow... What kind of bridge do you have to maintain all those resistors?
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: Hawaii596 on 11-21-2008 -- 19:17:26
I've got an old Guildline 9975 that I am also trying to resurrect.  I got operators instructions faxed to me from the OEM a couple of years ago, and we just found some GIDEP stuff.
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: Hackman on 12-30-2012 -- 15:54:17
 I worked at Leeds and Northrup from 1969-1994. I have a Catalog that shows the 4333 shunt if you are still interested.
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: Hawaii596 on 01-02-2013 -- 21:50:23
Actually I do still need the specs.  I am getting ready to get more involved again in the 9975 project.  Thanks for the reply.
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: dbaum49525 on 04-24-2020 -- 19:06:20
I'm another L & N'er (79 - 94) and probably have the spec sheet around - somewhere.
Don, GR MI
Title: Re: Need Specs or Data Sheet for Old L&N 4333 Shunt
Post by: USMCPMEL on 05-12-2020 -- 16:59:58
We have some really good uncertainties on resistors.

https://cabportal.touchstone.a2la.org/index.cfm?event=directory.detail&labPID=2F94CC06-D233-4F9D-A815-697C49DAC447