I need to measure continuity through anodized aluminum surface, i.e. punch through the surface and contact to the metal itself.
Does the clamp exist of some sort allowing me to grip the metal and do punching and measuring in one shot.
Appreciate all advices.
Regards,
Andrey Gleener
I've reliably measured low-ohm continuity through the bodies of plated aluminium-alloy military connectors with spring-loaded, single-point, needle-probes. (Hmm, managed three hyphens in a row there).
The probes were stainless steel with the finest point available in order to to get the highest llbs/square-inch. Two probes per contact, one for the stimulus current and the other for the mV pickup.
AFAIR we had a resolution of l milliohm and were looking for less than 10 milliohms continuity.
-- Tony Williams.
Thank you for your advice. Exactly what I am loking for. Where did you get such probes?
Regards,
Andrery
In message , dated Fri, 18 Aug 2006, Andrey writes
You can use ordinary steel pins, at a noticeable cost-saving. Your wife may supply samples FOC. (;-)
-- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
i'd use a test probe with a needle soldered to the tip
if you want a clamp maybe you can solder some needles to an existing clamp,
-- Bye. Jasen
The first probes were turned-up on the lathe and the springs were 2" long fingers of pcb material. I later found that ordinary bed-of-nails probes worked just as well.
For example, see part numbers 434-942 (needle point), or 434-324.
Although not such a good point I used the 434-324 because it has a small flange at the top. This is easier to mount, say in a threaded bolt.
-- Tony Williams.
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