holrum at hotmail.com
Thu Dec 31 07:56:16 UTC 2009
I have a Fluke 732A voltage standard and SR-104 resistance standard (and a couple of HP standard resistors). Also two HP 3458As to measure them with (a man with two 3458A's never knows that volt/ohm/amp it is... something tells me I need another one)
I also have a couple of Valhalla 2724A synthetic resistance standards, a Fluke 343A DC calibrator, Valhalla DC calibrator, Fluke 5200A AC calibrator, a couple of Valhalla voltage to current converters, Fluke 720A KVD, an Dytronics (ESI) 7 decade ratio transformer, a couple of ESI DB877 decade resistors, 5 x HP 3457A's etc.
I just got in the SR-104 a few weeks ago. I would love to get a fresh calibration for it... without spending the $880 that IET wants... It was last characterized 30 years ago...
If I can get good calibration constants for the SR-104, I can mount it in a sealed box and use the Thunderbolt temperature stabilization code to control the temperature at one of the two sweet spots where it measures precisely, exactly, 10,000 ohms. Every .01C moves the resistance around 27 micro-ohms...
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