Electronics > Projects, Designs, and Technical Stuff
Idea need how to measure "high" DC current with dmm
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ejeffrey:
Those should work.  You can also use the shunt with your own DMM which might have better resolution than the cheap panel meter.  The big downside of shunts is that you have to insert them inline with the circuit.  That's why clamp meters are so nice, you don't have to mess with the wiring.

The hall effect ammeter you linked to should also work fine, although it appears to be a single piece pickup coil which is not as convenient as a clamp meter.  It is a lot cheaper.

Don't measure a high side current shunt (including a fuse) with an oscilloscope unless you have a differential probe or a floating scope.
joeqsmith:
I use the UNI-T UT210E just for this.  At $30 it has paid for itself a few times.  The switch has started to go bad on the one I use most often but other than that, I really like the clamp.   
SilverSolder:

+1 for the UT210E.  I even managed to measure 200A with it (it is rated for 100A), by using a "calibrated piece of wood" to increase the air gap in the clamp!  Worked a treat to check starter current, proved the starter was bad, and got the job done.
Chriss:
I must order something cos I need it some time but very rare and just in vehicle repairing.
Nothing to deal with high side current...

But I have to figure out quickly something how to check now on a car does the 25A fuse blow slowly cos the circuit current consumption is really near the fuse rating or something other is going on...
SilverSolder:

Clamp meters are great because they work on both high and low sides.

You'll find it useful inside the house too, you can measure currents going to various circuits in the house from the breaker box...

The accuracy is actually surprisingly good, I checked the Uni-T with my lab power supply and found it to be close to bang on...
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