Anybody used a Fluke 771 or similar clip on ammeter?

[uoficowboy]

I recently became aware of the Fluke 771. It seems pretty cool - you can clip it on to a wire and then get a current measurement with pretty high accuracy and resolution. It only has two ranges - a 20ma and a 100ma range - so that's a bit limiting. But overall this seems like a really cool tool.

I also saw an HP 428B recently. Similar idea, but wider current measurement range. It is a pretty massive tool though and vacuum tube based, so less attractive, but still cool.

Anybody here have a clip on ammeter that can do low current measurements? Before seeing these two I thought that only worked for high current stuff, but clearly I was mistaken! Do you find them to be useful tools?

Thanks!

[georges80]

I use an Extech that can resolve to 10mA DC. It's handy for quick checks of input/output current on my LED drivers. Accuracy is not wonderful since the sensing can be 'influenced' by external magnetic fields, but fine for my go/no-go testing/verifying.

I use a Tek AC/DC 50MHz clamp probe system when I need to 'see' waveform details on my scope.

cheers,
george.