Fluke 884X-SHORT VS Keithley 8610 Shorting Plug 4-Wire (multimeter calibration)

[Kiriakos GR]

I wrote all ready too much, about  Fluke 884X-SHORT.
But there is one detail, that I could not leave as unexplored.
And finally, and after all these years, I did discover solid proofs directly from the mouth of the beast. 

Fluke 884X-SHORT this is development of 1996
FLUKE 45 Dual Display Multimeter this is another development of that era.

According to FLUKE 45 service manual...
FLUKE calibrator operator, he should use the shorting bar (SHORT) so to discharge and to null out front end offsets.
These offsets were generated at the calibration of 1000V range DC. 

Second use, at FLUKE 45 performance verification.....
Lowest mV DC range,  the shorting bar (SHORT) this was assisting DMM electronics, going down to lowest Noise floor faster.
100 mV (slow)  |  SHORT  |  expected display reading  -0.006   ~  +0.006


Now according to 8846A calibration certificate year 2023 (Everett Service Center)
FLUKE Calibration, they are using shorting bar (SHORT), again so to discharge and to null out front end offsets.
ZERO OFFSET TESTS (Front Input)
Configuration:  1st Range locked and maximum resolution.
Zeroed (use of SHORT) prior to measurements on the 10 and 100 ohm ranges in 2-Wire mode.
And they do that so the 13 VDC source, this not containing any other DCV electric charge.

And the Fluke 884X-SHORT, this has no other use.

And here comes the last bit of information,  when the calibrator output this is DCV  0.0000 mV
8846A measured result  -0.0003
At calibration certificate year 2011, this measurement is -0.0005

Now I can die in peace ...   
 

[overvolt]

New myth-busting moment!
And another milestone, Kiriakos experiences pack this grow further more. 

 
I am also welcoming our new Italian member 

[Kiriakos GR]

New myth-busting moment!

Indeed 

From the camp of Keithley Calibration procedures (year 2010).
Keithley Model 2010 ,  plus Keithley 8610 Shorting Plug.

They are two significant instructions, when the lab this has controlled room temperature.
1) Warm up the instrument for two hours.
2) Plug in Keithley 8610 Shorting Plug, and wait three minutes for thermal equilibrium.
Do not allow air drafts near this 8610 Shorting Plug.

This last detail, now explains of why this new designed Keithley 8620 enclosed version, this actually came out so to replace Keithley 8610 (Design of year 1991).     

https://download.tek.com/manual/2010-902-01(D-Oct2003)(Service).pdf

Today that I have finally gathered sum of baseline information's, these coming from both sources, I declare this ITTSB article as complete.
I do not own anything from Keithley, an so I never had a motive so to explore their own paper work in depth.