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Unbroken Chain to NIST or a Physical Property - Request for Peer Review

J

john ambrose

#1
I am an end user of calibration services at my employer. Curious if we had an unbroken chain to NIST or a physical property, I attempted to trace this back for my cal suppliers. The article is at T&MW's web site. If you search for my name, it will come up.

After scanning the pages here, I believe i have made some mistakes and errors of omission. Please let me know how I did.

Thank you.
 
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J

john ambrose

#4
Sorry about that. T&MW is Test and Measurement World. As a first time poster, I could not include a link.
 
D

dv8shane

#6
I am an end user of calibration services at my employer. Curious if we had an unbroken chain to NIST or a physical property, I attempted to trace this back for my cal suppliers. The article is at T&MW's web site. If you search for my name, it will come up.

After scanning the pages here, I believe i have made some mistakes and errors of omission. Please let me know how I did.

Thank you.
There are at least 9 questionable if not totally wrong parts of this diagram I found in less than five minutes.

First you have to fix resistance there is no traceability to your 4700 or your Fluke/BK workload dmm,s then take out WWVB from Agilent they use GPS, remove the ac measuring RLC meter connected to the standard resistors that are dc. Thermal ac dc transfer from a 4700 to a network analyzer WTF? Where is current and shunts to measure it for the 4700? Oh and Roseville is the specialist for the 3458A so I don't understand it being done at Loveland. Also where is the dc traceability for the Fluke temperature calibrator. If you want me to point out all the flaws email and I will discuss it with you

Overall a good attempt but it needs some luvin.

Shane
 
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J

john ambrose

#7
Thank you for the feedback.

I am sure you are right on the mistakes, except, for the 3458A. I just sent our unit in for calibration (OPT 002) and asked for the Josephson Junction calibration. They had me send it to Loveland, CO. All of our 34401A meters go to Roseville, as you said.
 
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