[volt-nuts] Keithley triax cables, 6011 and 1506/1507

[Russ Ramirez]

Andrea, I can comment on the Triax cabling in that the Pomona and others
you see on ebay are not compatible for the Keithley units generally. I have
a 617 electrometer that I acquired from the designer of it, and he told me
that Keithley Sr made sure the triax design was unique; a Keithley designed
3-lug Triax BNC design. Then as you already are aware, there is the
performance of the Keithley cable itself. I also was told to create a
Faraday Shield 'box' with alligator clip leads, attached to the Triax
chassis connector internally with solid wires (just used Cat-5 wire pieces)
so that outside EM would not add to the noise level on low current
measurements. That actually does make a huge difference and allow for
extremely low voltage and current measurements with greater certainty. This
instrument is a real pleasure to work with.

Russ

On Thu, Nov 19, 2015 at 8:12 AM, Andrea Baldoni <erm191ba3 at ermione.com>
wrote:

> Hello.
>
> I will soon acquire a nVmeter, a current source and an electrometer made by
> Keithley. They will come without any cable and manuals and in unknown
> working
> condition.
>
> One of the first steps is obtaining the cables.
> I saw some of them for sale on Ebay, but I can roll my own, if it's
> possible
> to do it without recurring to poisonous cadmium solder and the like (for
> the
> nVmeter; the electrometer too will advantage from low EMF cables but maybe
> it's
> not so important, or not? More important would be the cable insulation and
> triboelectricity).
>
> Someone already did it? What components (connectors, cable) do you suggest?
>
> Best regards,
> Andrea Baldoni
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