Need Specs or Data Sheet for Old L&N 4333 Shunt

Started by Hawaii596, 11-19-2008 -- 17:12:55

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Hawaii596

11-19-2008 -- 17:12:55
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. 
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

flew-da-coup

#1
11-20-2008 -- 05:21:56
Quote from: Hawaii596 on 11-19-2008 -- 17:12:55
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. 
Actual value with stated uncert. will be fine. Label the shunt with the actual value.
You shall do no injustice in judgment, in measurement of length, weight, or volume.Leviticus 19:35

scottbp

#2
11-20-2008 -- 07:13:15
Wow... What kind of bridge do you have to maintain all those resistors?
Kirk: "Scotty you're confined to quarters." Scotty: "Thank you, Captain! Now I have a chance to catch up on my technical journals!"

Hawaii596

#3
11-21-2008 -- 13:17:26
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.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

Hackman

#4
12-30-2012 -- 09:54:17
 I worked at Leeds and Northrup from 1969-1994. I have a Catalog that shows the 4333 shunt if you are still interested.

Hawaii596

#5
01-02-2013 -- 15:50:23
Actually I do still need the specs.  I am getting ready to get more involved again in the 9975 project.  Thanks for the reply.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

dbaum49525

#6
04-24-2020 -- 14:06:20
I'm another L & N'er (79 - 94) and probably have the spec sheet around - somewhere.
Don, GR MI
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