Most stable VPG parts, HZ or VHP?

[leighcorrigall]

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I have not used that TXSFR standard myself, but it looks like it directly plugs into your (and my!) 6581T for cal purposes. I believe the same spacing is also useful for a 3458a. It is a nice feature of the 6581 and 3458a that they allow this type of calibration.

If the meter calibration requires leads I guess the company sells an adapter of some sort (or you can make one).

Although this is completely off-topic, I think a better solution would be:
https://www.ab-precision.de/products/electrical-standards/

The product is from a forum member named Adrian Bernhard. He also makes shielded cables. 

[leighcorrigall]

Leigh,
Just curious do you know that Texas Components sells metrologycalibration standard resistors? Seems like a good deal given what you are going through? Or not.

http://webdirect.texascomponents.com/SearchResults.asp?Cat=1839

In retrospect, I believe this turnkey product is just a Vishay resistor inside a pre-assembled box, judging by the language and diagrams from the datasheet. If this is true, then it's likely cheaper just to buy the top-quality VHP100 and an enclosure.

PS, I replaced the Advantest R6581T front banana jack sockets with LowThermal 2758 Series binding posts so that I could avoid calibrating the system with banana plug connections. I might be overthinking things...

[kj7e]

Leigh,
Just curious do you know that Texas Components sells metrologycalibration standard resistors? Seems like a good deal given what you are going through? Or not.

http://webdirect.texascomponents.com/SearchResults.asp?Cat=1839

In retrospect, I believe this turnkey product is just a Vishay resistor inside a pre-assembled box, judging by the language and diagrams from the datasheet. If this is true, then it's likely cheaper just to buy the top-quality VHP100 and an enclosure.

Sometimes that is exactly the case,  see this post for an example;
https://www.eevblog.com/forum/metrology/teardown-standard-resistors/msg891676/#msg891676

[leighcorrigall]

I have decided to purchase a 4-wire lead 10 kΩ resistor Y473310K0000S0L (VHA518-11Z) with post-manufacturing operations (PMO) from Vishay Precision Group to act as a transfer standard for my Advantest R6581T 8.5-digit multimeter.

...

This may seem trivial, but I noticed last week that on the bottom of page 4 of the HZ Series (Z-Foil) resistor datasheet the actual part number for a 4-terminal resistor is 302075-11Z (Y4733). Vishay should really standardize their part numbers. I really don't understand why there are multiple order numbers for the same part.