I've recently been tweaking my 4276A LCZ meter, and I am now at the point of needing 100pF and 1000pF capacitor standards.
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All the rest of the things are easy, I can measure resistors etc to sufficient digits, but the capacitors I'm less sure about.
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Does anyone have a good suggestion on how to measure capacitors accurately, assuming I have a full complement of test gear, but no reliable direct capacitance measurement gear beyond my 34461A multimeter in capacitance mode or my Der EE DE-5000 LCR meter? (I also have a 4263B LCR meter, but it is unknown regarding calibration and adjustment, and will have to remain so until I find a copy of the adjustment software, or reverse engineer it myself...)
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The 4276A calls for 100pF and 1000pF for adjustment procedures, and 1pF, 10pF, 100pF and 1000pF for performance verification, all calibrated to 0.01% accuracy at 1kHz and within 0.1% of their nominal values.
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I have made a bunch of 4-wire kelvin BNC adapter PCB's that attach directly to the instrument's BNC connectors, which work excellently for the open, short, and resistance values, so I can easily use them for the capacitors too.
Maybe polystyrene or mica are a reasonable choice?
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Any tips and help would be greatly appreciated.
Thanks!
Jared
Jared Cabot