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Old 3rd Mar 2020, 11:52 pm   #21
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 13,403
Default Re: Which bench multimeter?

Another use for a high resolution DVM is tracing shorts on boards. A multilayer PCB with a ground plane and a power plane with one shorted device or decoupler pulling the supply down is a classic puzzle.

With a current limited PSU putting a moderate current into the thing, you can plot a contour map of the relative potentials of all the accessible points for each plane. You can even measure the voltage drop along the j-lead of an SMT chip.

Cheating? yes, but it doesn't half make life easier.

Once you have some good tackle, you find new ways of using it.

Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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Old 4th Mar 2020, 12:46 am   #22
Join Date: May 2007
Location: Liss, Hampshire, UK.
Posts: 1,085
Default Re: Which bench multimeter?

We had both the Keithley and the few of the HP's (although branded Keysight) where I used to work which were probably bought from an end of year surplus. When I first saw them I thought what are we ever going to use these for? However, the portable multimeters kept on disappearing while these ones stayed on the shelf so I gave them a try and I certainly found them very useful - especially the high resistance range on the HP which was very useful for finding leaking connectors.
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